Mafic Inclusions, Aggregates, and Dikes in 

Granitoid Rocks, Central Sierra Nevada 

Batholith, California-Analytic Data 

U.S. GEOLOGICAL SURVEY BULLETIN 1899 
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Mafic Inclusions, Aggregates, and Dikes in 

Granitoid Rocks, Central Sierra Nevada 

Batholith, California-Analytic Data 

By BERNARD BARBARIN, F.C.W. DODGE, R.W. KISTLER, 

and P.C. BATEMAN 

U.S. GEOLOGICAL SURVEY BULLETIN 1899 
DEPARTMENT OF THE INTERIOR 

MANUEL LUJAN, JR., Secretary 

U.S. GEOLOGICAL SURVEY 

Dallas L. Peck, Director 

Any use of trade, product, or firm names in this publication 

is for descriptive purposes only and does not imply 

endorsement by the U.S. Government 

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1989 

For sale by the Books and 

Open-File Reports Section, 

U.S. Geological Survey 

Federal Center, Box 25425 

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Library of Congress Cataloging-in-Publication Data 

Mafic inclusions, aggregates, and dikes in granitoid rocks, Central Sierra Nevada batholith, California-analytic data I by Bernard Barbarin ... [et al.] 

p. em.- (U.S. Geological Survey bulletin; 1899) 

Includes bibliographical references. 

Supt. of Docs. no.: I 19.3; 1899 

1. Granite-California-sierra Nevada Region-Inclusions. 2. Rocks, Ultrabasic-California-sierra Nevada Region. 3. Geology-California-sierra Nevada Region. I. Barbarin, Bernard. II. Series. 

QE75.89 no. 1899 557.3 s-clc20 89-600250 

[QE462.G7] [552' .3] CIP 
CONTENTS 

Abstract 1 

Introduction 1 

Occurrence and distribution 2 

Sampling and analytical methods 2 

Host rocks 3 

Aggregates 3 

Inclusions and dike rocks 3 

Mineral compositions 3 

References cited 3 

FIGURES 

1. Simplified geologic map of the Sierra Nevada between latitudes 37° and 

38° N. 7 

2. Modal plots of mafic inclusions, aggregates, dikes, and their host 

granitoids 8 

3. Normative plots of mafic inclusions, aggregates, dikes, and their host 

granitoids 8 

4. Plot of mutually exclusive normative constituents of mafic inclusions, aggregates, dikes, and their host granitoids 9 

TABLES 

1. Location and rock unit of collected samples 10 

2. Modal analyses, in volume percent, of mafic inclusions, aggregates, dikes, and 

their host granitoids and associated gabbroid 11 

3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and 

their host granitoids, associated gabbroid, and aplite 13 

4. CIPW norms of mafic inclusions, aggregates, dikes, and their host granitoids, 

associated gabbroid, and aplite 21 

5. Average chemical analyses, in weight percent, of biotite in mafic inclusions, 

dikes, aggregates, and their host granitoids 24 

6. Average chemical analyses, in weight percent, of hornblende in mafic inclusions, dikes, aggregates, and their host granitoids and associated 

gabbroid 26 

7. Rb-Sr isotopic data on mafic inclusions, dikes, aggregates, and their host 

granitoids 28 

8. Sm-Nd isotopic data on mafic inclusions, aggregates, and associated 

rocks 29 

Contents Ill 

Mafic Inclusions, Aggregates, and Dikes in Granito_id Rocks, 

Central Sierra Nevada Batholith, California-Analytic Data 

By Bernard Barbarin, 1 F.C.W. Dodge, R.W. Kistler, and P.C. Bateman 

ABSTRACT 

Analytic data are reported herein for a comprehensively 

studied suite of samples of mafic inclusions, aggregates or 

schliere, and dikes and their host granitoids from 121ocalities 

in the central Sierra Nevada. Modes are given for 61 of the 

samples, and major-element oxides and selected traceelement concentrations are tabulated for 81. Chemical analyses are presented for coexisting hornblendes and biotites in 

the inclusions, dikes, aggregates, and their host granitoids. 

INTRODUCTION 

During the past 25 years, analytic data on granitoid 

rocks of the central Sierra Nevada have been included in 

numerous reports of the U.S. Geological Survey by 

geologists studying 15-minute quadrangles in the region 

between latitudes 37° and 38° N. (for example, Bateman, 

1965a; Bateman and Busacca, 1983; Bateman and others, 

1984; Bateman and Lockwood, 1970, 1976; Bateman and 

Wones, 1972a; Dodge and Calk, 1986). These data are 

typical of large parts of mapped granitoid bodies of the 

Sierra Nevada batholith. However, many of these large 

granitoid units contain mafic inclusions, streaky aggregates, and dikes that generally have not been collected 

and analyzed. This report provides modal, chemical, and 

isotopic data on such rocks and their hosts, and it 

provides chemical data on constituent hornblendes and 

biotites from a dozen localities selected from four 

mapped granitoid units. Limited additional data were 

obtained on samples taken from other localities; however, these data are incomplete and are not included 

herein. 

Recent reports on the Sierra Nevada have referred 

to dark, fine-grained clots as "mafic inclusions" or "mafic 

enclaves" to avoid any genetic implications. Similar inclusions have been called basic concretions, autoliths, xenoliths, magmatic enclaves, or other names that usually 

Manuscript approved for publication June 14, 1989. 1 U niversite de Paris-Sud, Laboratoire de Petrographie-Volcanologie, Bfit. 504, F-91405 Orsay Cedex, France. 

have a genetic connotation. These inclusions, althou~h 

variable in size, have well-defined shapes, are generally m 

sharp contact with their hosts, and typically are distinctly 

finer grained than their hosts. Less-compact aggregates 

of mafic minerals commonly have diffuse, irregular outlines and may show little difference in grain size compared with their hosts. Both gradations and abrupt discontinuities are present between aggregates and host 

granitoids, but only abrupt discontinuities are present 

between inclusions and host granitoids. Streaky aggregates consisting principally of mafic minerals are locally 

associated with the inclusions. Although all elongate 

mafic aggregates or segregations, including elongate 

inclusions, could be included under the term "schlieren," 

geologists in the Sierra Nevada have followed the usage 

of Cloos (1936), who restricted the term to composite 

layers within plutons that grade from mafic, fine-grained 

rock to more felsic, coarser grained rock. Therefore, we 

have simply called all irregular, streaky concentrations of 

mafic minerals, whether or not layered, aggregates. 

Mafic dikes occur as both continuous and fragmental 

sheetlike or tabular bodies that commonly cut primary 

foliations, whereas inclusions commonly define the foliations. 

A Ph.D. thesis study by Adolf Pabst over 60 years 

ago resulted in the publication of his often-cited classic 

paper on inclusions in Sierra Nevada granitoids (Pabst, 

1928). More recently, these mafic inclusions have been 

the prime subject of a few studies (Link, 1968; Reid and 

others, 1983; Furman and Spera, 1985), but they have 

also been mentioned in several broader investigations 

(Bateman, 1965b, in press; Loomis, 1983; Moore, 1963; 

Noyes and others, 1983; Piwinskii, 1968; Sherlock and 

Hamilton, 1958). The present. study began ~hen :.c. 

Bateman and F.C.W. Dodge started collecting mclus10ns 

and associated rocks as an adjunct to regional studies in 

the central Sierra Nevada. Subsequently, Bernard Barbarin collected additional samples from localities in 

regions mapped by Bateman, Dodge, and other U.S. 

Geological Survey geologists (Bateman, 1965a; Bateman 

and Busacca, 1982; Bateman and others, 1971; Bateman 

and Wones, 1972b; Dodge and Calk, 1987; Lockwood 

Introduction 
and Bateman, 1976) and conducted an intensive study of 

all collected samples. Barbarin's work was done while he 

was the recipient of a "Lavoisier" grant from the French 

government and with U.S. Geological Survey support. 

OCCURRENCE AND DISTRIBUTION 

Mafic inclusions, although widespread, are almost 

exclusively restricted to hornblende-bearing granitoids 

and are most common in felsic tonalites and mafic 

granodiorites. Commonly they are uniformly distributed 

over broad areas, although local concentrations are not 

uncommon. Local accumulations mainly occur near contacts of one granitoid body with another, but they are also 

found far from contacts. In compositionally zoned granitoid bodies, the abundance of inclusions commonly varies 

sympathetically with the mafic mineral content of the 

host, generally decreasing from margins to interiors of 

granitoid bodies. Moore (1963, p. 119) showed that 

thicker plutons have smaller proportions of inclusions 

than thinner ones, regardless of mafic mineral content. 

Inclusion abundance and age are not apparently correlative; inclusions are present in rocks ranging from Late 

Triassic to Late Cretaceous, the entire age span of 

granitoids in the central Sierra Nevada. 

Unlike mafic inclusions, streaky aggregates of mafic minerals are locally concentrated in granitoids of all 

compositions; the occurrence of these aggregates rarely 

exceeds such local concentrations. Zones of aggregates 

are most common near contacts between granitoids of 

markedly different compositions or near contacts of 

granitoids with country rocks, but they also occur within 

plutons, far from external contacts. Mafic inclusions are 

typically associated with the aggregates, particularly near 

contacts and where the host granitoid composition is 

appropriate. 

Mafic dikes occur sporadically, singly, and in small 

groups as well as in large, pervasive multitudes, as in the 

Independence and Sonora dike swarms (Moore and 

Hopson, 1961; Schweickert and Bogen, 1983). Dikes may 

be common in one part of a pluton but sparse or 

nonexistent elsewhere, and they are totally absent in 

many plutons, particularly those that are felsic. Typically, 

individual dikes are a few centimeters to a few meters 

thick and generally are vertical or dip gently, as along 

Stevenson Creek, a tributary of the San Joaquin River. 

Most dikes have sharp walls that cut across the foliation 

of enclosing rocks, although some appear to have been 

deformed and cleaved along with their hosts. Rarely, as at 

Retch Hetchy, the dikes are disrupted or broken up into 

inclusion-like bodies, although such dikes maintained 

their original continuity. Some dikes are net veined with 

felsic aplitic material that may compose a large portion of 

the dike. Contacts between the felsic and mafic parts of 

these dikes are typically crenulate. 

SAMPLING AND ANALYTICAL METHODS 

Various numbering schemes were used when samples were originally collected. For consistency, samples 

were redesignated using a uniform system. The first two 

letters reflect the sample locality (see Table 1). These 

capital letters are followed by the number of samples 

collected from the locality; a lowercase letter following a 

number indicates whether more than one sample, and 

how many, have been collected from a single dike or 

inclusion. The alphanumeric string is followed by a dash 

and a capital letter designating sample type: H, host 

granitoid; A, aggregate; D, dike; I, inclusion; G, gabbraid; AP, aplite. For some samples this letter is followed 

by "m" or "c" indicating the margin or core of an 

inclusion or by ''x:" or "i" indicating exterior or interior of 

a dike. Thus, MHb9b-Ic refers to the core of an inclusion 

collected from Camp 61. 

Location and the distribution of rock units from 

which samples were taken are given in table 1 and shown 

in figure 1. The size of sampled outcrop varies but 

typically is within an area of tens of square meters or less. 

Modal analyses of medium- to coarse-grained 

rocks were determined by combining the point counts of 

selectively stained rock slabs (Norman, 1974) with those 

of thin sections; modal analyses of fine-grained rocks 

were determined from thin sections only. Sixty-one 

modal analyses, including 33 of inclusions, 13 of host 

rocks, 7 each of mafic aggregates and dike rocks, and 1 

gabbro, are given in table 2. Chemical and trace-element 

analyses of 39 mafic inclusions, 15 host rocks, 14 dike 

rocks, 10 mafic aggregates, 1 aplite, 1 gabbro, and 1 

hornfels inclusion are given in table 3; CIPW norms 

computed from the chemical analyses are given in table 

4. All samples were thoroughly examined and carefully 

prepared to ensure that only the designated rock type was 

contained in the analyzed material. 

Electron microprobe analyses of biotite and hornblende, 67 of each mineral, are given in tables 5 and 6. 

Each quoted analysis represents the mean of three to 

nine individual analyses of mineral grains from a specific 

rock type within a sample. Whenever possible, microprobe mounts were prepared to include parts of host 

rock, inclusion, and aggregate so that minerals from all 

the rock types could be analyzed from a single mount. 

Separate analyses are presented for hornblendes and 

biotites from cores or darker areas of a few inclusions. 

The modal amounts of plagioclase, mafic plus 

accessory minerals, and quartz plus potassium feldspar, 

and the amounts of plagioclase, quartz, and potassium 

feldspar recalculated to 100 percent are plotted on 

ternary diagrams (fig. 2). Similarly, percentage of normative albite plus anorthite, quartz plus orthoclase, and all 

other constituents, and the percentage of normative 

albite plus anorthite, quartz, and orthoclase recalculated 

to 100 percent are plotted (fig. 3). In addition, the 

2 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
amounts of the mutually exclusive normative constituents olivine or quartz and diopside or corundum, indicators of silica and alumina under- or oversaturation, are 

shown in figure 4. 

A total of 65 strontium and 11 neodymium isotopic 

analyses of host rock, inclusions, mafic aggregates, and 

dike rocks are given in tables 7 and 8, respectively. Errors 

reported are within two standard deviations of the mean. 

Values of 87Sr/6

Sr are normalized to a value of 86Sr/8

Sr=0.1194 and replicate analyses of SrC03 standard NBS 987 give a value of 87Sr/6

Sr=0.710236±3. 

Values of 143Nd/ 44Nd are normalized to a value of 146Nd/144Nd=0.7219 and replicate analyses of USGS 

rock standard BCR-1 give a value of 143Nd/ 44Nd= 

0.512642. 

HOST ROCKS 

Compositions of host rocks are restricted to but 

span the entire granodiorite and tonalite fields. The 

amount of mafic minerals generally ranges between 10 

and 25 percent, although it is greater for a few of the 

samples. Silica contents range between 60 and 70 weight 

percent and potassium-oxide contents range between 1.7 

and 4.0 percent. Norms of the host rocks are more closely 

clustered on the ternary diagrams than are the modes. 

All the granitoid hosts are quartz normative and most are 

weakly alumina saturated, falling within the field defined 

by norms of other Sierra Nevada plutonic rocks. Traceelement contents are similar to those reported by Dodge 

and others (1982) for hornblende-bearing Sierra Nevada 

granitoid rocks. 

AGGREGATES 

Because of their inherent inhomogeneity, analytical data of the mafic aggregates or schliere are difficult to 

evaluate. Commonly, the analytical data overlap those of 

the other groups and all plots show considerable scatter. 

INCLUSIONS AND DIKE ROCKS 

Modes of inclusions tend to plot along the 

plagioclase-quartz join of the quartz-potassium feldsparplagioclase diagram within the diorite, quartz diorite, and 

tonalite fields. Mafic and accessory minerals make up 

less than 25 to more than 60 volume percent of the 

inclusions but generally are between 30 and 55 percent. 

On the triangular plot of all constituents, the modes of 

host rocks and inclusions form an arcuate field with mafic 

inclusions forming the end of the field closer toward 

mafic plus accessory minerals and their hosts forming the 

end closer toward quartz plus alkali feldspar. Although 

the field is continuous, there is little overlap between the 

two groups. A similar relation is shown by norms, 

although norms are displaced toward the quartz plus 

orthoclase corner, which reflects the content of potassium in biotite in computing normative orthoclase. Also, 

at least in part because of biotite, the inclusions tend to 

lie on or near the orthoclase-albite plus anorthite join of 

the quartz-albite plus anorthite-orthoclase diagram, even 

though all the inclusions contain at least minor or trace 

amounts of modal quartz. In fact, about half the inclusions are olivine normative. Only two quartz-normative 

inclusions contain normative corundum. Silica contents 

range from 46 to 63 weight percent and generally are 

between 50 and 60 percent, and potassium-oxide contents range from 0.72 to 3.93 percent but commonly are 

between 1.5 and 2.5 percent. Of the trace elements, the 

"compatible" or transition elements Sc, V, Cr, and Co 

are concentrated in inclusions relative to host rocks. 

Concentration of Zr is about the same in inclusions as in 

host rocks. Concentration of Ba tends to be lower in 

inclusions, but concentration of Rb is generally greater. 

Rare-earth elements are commonly less fractionated in 

inclusions than in the host granitoids, and La/Yb ratios of 

the inclusions are about half those of the hosts, although 

total rare-earth-element contents are greater in the inclusions. 

Generally, the analytic data on samples of mafic 

dikes are similar to those of the mafic inclusions, particularly the more quartz-rich inclusions. 

MINERAL COMPOSITIONS 

Biotite and hornblende in mafic inclusions, dikes, 

and aggregates have the same chemical composition as in 

the contiguous granitoids, regardless of differences in 

grain size, morphology, crystal habit, or location within 

the inclusions. Atomic Fe/Fe+ Mg ratios clearly show 

this relation. Where compositions of the mafic minerals 

change from one locality to another within a pluton, 

parallel changes occur within the inclusions. These compositional variations also occur in biotite and hornblende 

from closely spaced inclusion-granitoid pairs from the 

same locality. 

REFERENCES CITED 

Bateman, P.C., 1965a, Geologic map of the Blackcap Mountain 

quadrangle, Fresno County, California: U.S. Geological 

Survey Geologic Quadrangle Map GQ-428, scale 

1:62,500. 

--1965b, Geology and tungsten mineralization of the 

Bishop district, California: U.S. Geological Survey Professional Paper 4 70, 208 p. 

--in press, Constitution and genesis of the central part of 

the Sierra Nevada batholith, California: U.S. Geological 

References Cited 3 
Survey Professional Paper 1483. 

Bateman, P.C., and Busacca, A.J., 1982, Geologic map of the 

Millerton Lake quadrangle, west-central Sierra Nevada, 

California: U.S. Geological Survey Geologic Quadrangle 

Map GQ-1548, scale 1:62,500. 

---1983, Millerton Lake quadrangle, west-central Sierra 

Nevada, California: U.S. Geological Survey Professional 

Paper 1261, 20 p. 

Bateman, P.C., Dodge, F.C.W., and Bruggman, P.E., 1984, 

Major oxide analyses, CIPW norms, modes, and bulk 

specific gravities of plutonic rocks from the Mariposa 1 o 

by 2° sheet, central Sierra Nevada, California: U.S. 

Geological Survey Open-File Report 84-162, 50 p. 

Bateman, P.C., and Lockwood, J.P., 1970, Kaiser Peak quadrangle, central Sierra Nevada, California-analytic data: 

U.S. Geological Survey Professional Paper 644-C, p. 

C1-C15. 

---1976, Shaver Lake quadrangle, central Sierra Nevada, 

California-analytic data: U.S. Geological Survey Professional Paper 774-D, p. D1-D20. 

Bateman, P.C., Lockwood, J.F., and Lydon, P.A., 1971, Geologic map of the Kaiser Peak quadrangle, central Sierra 

Nevada, California: U.S. Geological Survey Geologic 

Quadrangle Map GQ-894, scale 1:62,500. 

Bateman, P.C., and Wones, D.R., 1972a, Huntington Lake 

quadrangle, central Sierra Nevada, California-analytic 

data: U.S. Geological Survey Professional Paper 724-A, 

p. A1-A18. 

---1972b, Geologic map of the Huntington Lake quadrangle, central Sierra Nevada, California: U.S. Geological 

Survey Geologic Quadrangle Map GQ-987, scale 

1:62,500. 

Cloos, Ernst, 1936, Der Sierra-Nevada-Pluton in Californien: 

Neues Jahrbuch fiir Mineralogie, Geologie und Palaentologie, supp., v. 76, no. 3, sec. B, p. 355-450. 

Dodge, F.C.W., and Calk, L.C., 1986, Lake Eleanor quadrangle, central Sierra Nevada, California-analytic data: 

U.S. Geological Survey Bulletin 1565, 20 p. 

---1987, Geologic map of the Lake Eleanor quadrangle, 

central Sierra Nevada, California: U.S. Geological Survey Geologic Quadrangle Map GQ-1639, scale 1:62,500. 

Dodge, F.C.W., Millard, H.T., Jr., and Elsheimer, H.N., 1982, 

Compositional variations and abundances of selected 

elements in granitoid rocks and constituent minerals, 

central Sierra Nevada batholith, California: U.S. Geological Survey Professional Paper 1248, 24 p. 

Domenick, M.A., Kistler, R.W., Dodge, F.C.W., and Tatsumoto, M, 1983, Nd and Sr isotopic study of crustal and 

mantle inclusions from the Sierra Nevada and implications for batholith petrogenesis: Geological Society of 

America Bulletin, v. 94, p. 713-719. 

Furman, Tanya, and Spera, F.J., 1985, Co-mingling of acid and 

basic magma with implications for the origin of mafic 

I-type xenoliths: Field and petrochemical relations of an 

unusual dike complex at Eagle Lake, Sequoia National 

Park, California, U.S.A.: Journal of Volcanology and 

Geothermal Research, v. 24, p. 151-178. 

Link, A., 1968, Inclusions in the Half Dome Quartz Monzonite, 

Yosemite National Park, California: Evanston, Ill., 

Northwestern University, unpublished Ph.D. thesis. 

Lockwood, J.P., and Bateman, P.C., 1976, Geologic map of the 

Shaver Lake quadrangle, central Sierra Nevada, California: U.S. Geological Survey Geologic Quadrangle Map 

GQ-1271, scale 1:62,500. 

Loomis, A.A., 1983, Geology of the Fallen Leaf Lake 15' 

quadrangle, El Dorado County, California: California 

Division of Mines and Geology Map Sheet 32, scale 

1:62,500. 

Moore, J.G., 1963, Geology of the Mount Pinchot quadrangle, 

southern Sierra Nevada, California: U.S. Geological 

Survey Bulletin 1130, 152 p. 

Moore, J.G., and Hopson, C.A., 1961, The Independence dike 

swarm in eastern California: American Journal of Science,v. 259,p. 241-259. 

Norman, M.B., 1974, Improved techniques for selective staining of feldspar and other minerals using amaranth: U.S. 

Geological Survey Journal of Research, v. 2, p. 73-79. 

Noyes, H.J., Frey, F.A., and Wones, D.R., 1983, A tale of two 

plutons: Geochemical evidence bearing on the origin and 

differention of the Red Lake and Eagle Peak plutons, 

central Sierra Nevada, California: Journal of Geology, v. 

91,no.5,p.487-509. 

Pabst, Adolf, 1928, Observations on inclusions in granitic rocks 

of the Sierra Nevada: University of California Publications, Bulletin of Sciences, v. 17, p. 325-386. 

Piwinskii, A.J., 1968, Studies of batholithic feldspars: Sierra 

Nevada, California: Contributions to Mineralogy and 

Petrology, v. 17, p. 204-223. 

Reid, J.B., Jr., Evans, O.C., and Fates, D.G., 1983, Magma 

mixing in granitic rocks of the central Sierra Nevada, 

California: Earth and Planetary Science Letters, v. 66, p. 

243-261. 

Schweickert, R.A., and Bogen, N.L., 1983, Tectonic transect of 

Sierran Paleozoic through Jurassic accreted belts: Society of Economic Paleontologists and Mineralogists, 

Pacific Section, 22 p. 

Sherlock, D.G., and Hamilton, W.B., 1958, Geology of the 

north half of the Mount Abbot quadrangle, Sierra 

Nevada, California: Geological Society of America Bulletin, v. 69, p. 1245-1267. 

Streckeisen, A.L., 1973, Plutonic rocks: Oassification and 

nomenclature recommended by the lUGS subcommission on the systematics of igneous rocks: Geotimes, v. 18, 

no. 10, p. 26--30. 

4 Mafic Inclusions, Aggregates, and .Dikes In Granitoid Rocks, California 
FIGURES 1-4; TABLES 1-8 

120° ~0.----,--~----------------~~~~~--------------~~~~~~~~~--~~~~~ 

.. '~ ~ .. :·;::;:;/:: ~;·~:::::~~~<;~;: ~::. ·:: :~ ::: .:·.~ : .. :.:·~: \·.:.·/ ~ ·. ·~ .... ·. :: .. : .'::.::. ·.~·.·:·:·:·:··~·:.-.-::. . . .. ' .... . . . . . . .. . . . ·: 

0 20 KILOMETERS 

EXPLANATION 

I:'.: .. · _'· . .'·1 Cenozoic deposits 

Granodiorite of 

Red Lake 

Mount Givens 

Granodiorite 

Bass Lake Tonalite 

D Other granitic rocks 

~ Country rock 

Dinkey Creek 

Granodiorite 

eHH Sample locality-See table 1 

Figure 1. Simplified geologic map of the Sierra Nevada between latitudes 37° and 38° N. showing distribution of granitoid rock 

units and locations from which samples were taken. 

Figures 1-4; Tables 1-8 7 
Q 

• 

EXPlANATION 

Q Quartz 

PF Potassium feldspar 

P Plagioclase feldspar 

+ Host granitoid 

• Aggregate 

• Inclusion 

PF 

A 

60 70 80 90 p 

Q 

A 10 35 65 

8 

M+A 

v v v v v 

p 10 20 30 40 50 60 

c 

EXPI.ANA TION 

Q Quartz 

A Alkali feldspar 

P Plagioclase feldspar 

p 

EXPI.ANA TION 

M+A Mafic+ accessory 

minerals 

P Plagioclase 

Q+P Quartz + potassium 

feldspar 

+ Host granitoid 

• Aggregate 

• Inclusion 

Figure 2. Modal plots of mafic inclusions, aggregates, dikes, 

and their host granitoids. A, Plot on plagioclase-quartzpotassium feldspar diagram. 8, Classification from Streckeisen and others (1973). C, Plot on diagram of all modal 

constituents. 

0 

A 

10 

p 

8 

20 

50 

10 20 

Q 

AO 

60 \ 

•• 

• 

• 

~ ~· , -: . ~~--: .. "" • ."\t + 

+ 

30 40 50 

EXPlANATION 

Q Quartz 

0 Orthoclase 

P Plagioclase (ab+an) 

+ Host granitoid 

• Aggregate 

• Inclusion 

• Dike 

• 40 

+~ 30 

+l•+ • .... 20 ..... , 

'-

• ~·· 

60 

10 

.. 70 80 90 p 

EXPLANATION 

A 0 All olhers 

P Plagioclase (ab+an) 

Q+O Quartz + orthoclase 

+ Host granitoid 

• Aggregate 

• Inclusion 

• Dike 

Figure 3. Normative plots of mafic inclusions, aggregates, 

dikes, and their host granitoids. A, Plot on albite+ anorthitequartz-orthoclase diagram. 8, Plot on diagram of all normative constituents. 

8 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
10 

5 

Corundum 

diopside 

4 

4 4 

4 

• 4 4 4 

4 4 

20 15 10 

4 4 

4 • • 4 

4 4 

~ 

• • i 4 •• 

• 

44 

• 

Ill •• 

• • • • 

• 4 

• 

• 

4 

• 

• 

EXPlANATION 

+ Host granitoid 

• Aggregate 

• Inclusion 

• Dike 

olivine Quartz 

5 0 5 10 15 20 25 

SILICA CONTENT, IN WEIGHT PERCENT 

30 35 40 

Figure 4. Plot of mutually exclusive normative constituents of mafic inclusions, aggregates, dikes, and their host granitoids 

showing silica and alumina over- or under-saturation. Outlined field includes more than 90 percent of CIPW norms of Sierra 

Nevada plutonic rocks from Bateman and others (1984). 

Table 1. Location and rock unit of collected samples 

Map lat. long. 

Symbol locality (N.) (W.) Rock unit 

(fig.l) 

HH Hetch Hetchy 37°56.8' 119°47.2' Bass Lake Tonalite 

NF North Fork 37°11.6' 119°35.8' Do. 

ML Meadow Lakes 37°04.4' 119°24.5' Do. 

sc Stevenson Creek 37°11.2' 119°20.9' Do. 

SQ Shaver Lake quarry 37°09.3' 119°17.7' Dinkey Creek Granodiorite 

cs Camp Sierra 37°11.6' 119°15.6' Do. 

MK Markwood Creek 37°05.8' 119°14.7' Do. 

DR Deer Creek 37°00.3' 119°04.0' Do. 

WR Wishon Reservoir 36°59.9' 118°57.6' Do. 

CP Chinese Peak 37°13.3' 119°09.3' Granodiorite of Red Lake 

MHa Mono Hot Springs 37°19.5' 119°00.8' Mount Givens Granodiorite 

MHb Camp 61 3]0 19.1' 119°03.7' Do. 

CR Courtright Reservoir 37°04.4' 118°58.0' Do. 

Figures 1-4; Tables 1-8 9 
Table 2. Modal analyses, in volume percent, of mafic inclusions, aggregates, dikes, and their host granitoids and 

associated gabbroid 

[Analyses by B. Barbarin. Rock type indicated by letter following hyphen: H, host granitoid; A, aggregate; I, inclusion; D, dike. Letter 

following rock type: x, exterior; i, interior; m, margin; c, core] 

Bass Lake Tonalite 

Hetch Hetchy North Fork 

Tonalite Aggregate Inclusion Dike rock Tonalite Inclusion 

HH1-H HH3-A HH4-I HH6a-D HH6b-D HH6d-D NF1-H NF2-I NF3-I 

Quartz 26.6 

K-feldspar 19.2 

Plagioclase 37.3 

Biotite 8.7 

Hornblende 6.3 

Sphene } 

Opaque _1.9 

Other 

Total 100.0 

20.8 

0.6 

50.4 

15.0 

11.5 

} 1.7 

100.0 

2.7 

0 

49.9 

21.5 

23.3 

1.1 

1.1 

0.4 

100.0 

3.9 

0.8 

49.1 

13.3 

30.0 

2.1 

0.3 

_QJ 

100.0 

Bass Lake Tonalite-Continued 

9.6 

0.1 

47.5 

12.6 

27.8 

1.3 

0.3 

0.8 

100.0 

North Fork-Continued Meadow Lakes 

Quartz 

K-feldspar 

Plagioclase 

Biotite 

Hornblende 

Sphene 

Opaque 

Other 

Total 

Dike rock 

NF4a-D 

1.4 

0 

52.3 

9.8 

32.9 

0.4 

2.5 

0.7 

100.0 

NF4b-D 

0.8 

0 

43.7 

16.9 

36.2 

0 

1.7 

0.7 

100.0 

Gabbro 

NFS-G 

Tonalite 

ML1-H 

16.8 20.3 

0.4 2.8 

43.7 47.8 

15.4 15.9 

22.7 11.6 

} 1.0 } 1.6 

100.0 100.0 

Inclusion 

ML2-I 

3.1 

0.4 

50.1 

12.1 

29.6 

1.2 

2.5 

1.0 

100.0 

20.2 

0.5 

49.4 

16.0 

12.4 

} 1.5 

100.0 

25.9 4.2 1.7 

9.5 1.4 0 

44.8 50.3 51.0 

12.3 13.2 18.6 

6.7 30.6 28.6 

}~ } 0.3 }~ 100.1 100.0 100.0 

Dinkey Creek Granodiorite 

Shaver Lake quarry 

Granodiorite Inclusion 

SQ1-H 

27.1 

13.9 

40.2 

12.1 

4.4 

SQ2-H 

25.4 

12.3 

41.3 

12.0 

7.5 

SQ3-I 

4.2 

0 

46.0 

18.0 

30.6 

SQS-1 

5.8 

0.6 

47.3 

18.2 

27.2 

} 2.3 } 1.5 } 1.2 } 0.9 

100.0 100.0 100.0 100.0 

Dinkey Creek Granodiorite-Continued 

Quartz 

K-feldspar 

Plagioclase 

Biotite 

Hornblende 

Sphene 

Opaque 

Other 

Total 

Quartz 

K-feldspar 

Plagioclase 

Biotite 

Hornblende 

Sphene 

Opaque 

Other 

Total 

Shaver Lake quarry-Continued Camp Sierra 

Inclusion-Continued 

SQ6-I SQ9-1 

1.2 17.2 

0 0.8 

49.7 49.0 

23.2 13.7 

24.9 18.4 

}~ }~ 100.0 100.0 

Markwood Creek 

Granodiorite 

MK1-H 

Inclusion 

MK2-I 

SQ10-I 

5.2 

0.1 

46.4 

25.5 

21.0 

1.4 

0.4 

_o_ 

100.0 

Tonalite 

DRla-H 

23.1 1.2 13.7 

8.5 0.4 0 

47.5 42.9 49.0 

11~ 1&0 1~7 

8.4 3~7 1~2 

}~ }~ }~ 100.0 100.0 100.0 

Dike rock 

Granodiorite Inclusion 

SQ11-I 

0.8 

0.7 

37.6 

24.6 

35.6 

}~ 100.0 

SQ12-Dx 

13.4 

2.6 

25.6 

33.2 

22.5 

1.0 

0.8 

~ 

100.0 

SQ12-Di CSl-H CS2-1 

11.9 22.2 20.9 

0.2 6.0 0.2 

40.5 52.3 50.3 

32.2 15.5 18.1 

14.0 2.9 9.0 

}~ }~ }~ 100.0 100.0 100.0 

CS3-I 

9.7 

1.7 

58.2 

14.4 

14.9 

}~ 100.0 

Dinkey Creek Granodiorite-Continued 

Deer Creek 

DRlb-1 

1.6 

0.1 

43.0 

18.8 

34.7 

0.1 

1.8 

_u 

100.0 

Inclusion 

DR4a-l 

0.3 

0 

44.4 

2.6 

46.9* 

0 

4.5 

0.3 

100.0 

DR4b-l 

2.1 

0 

53.7 

5.9 

34.7* 

1.7 

3.3 

0.6 

100.0 

Wishon Reservoir 

Granodiorite Aggregate Inclusion 

WR1-H WR2-A WR3-I 

23.7 14.3 

6.0 9.0 

46.4 24.3 

13.0 23.9 

10.1 26.0 

} 0.8 } 0.2 

100.0 100.0 

1.7 

0 

43.0 

23.7 

30.6 

}~ 100.0 

10 Mafic Inclusions, Aggregates, and Dikes In Granitoid Rocks, California 
Table 2. Modal analyses, in volume percent, of mafic inclusions, aggregates, dikes, and their host granitoids and 

associated gabbroid-Continued 

Granodiorite of Red Lake Mount Givens Granodiorite 

Chinese Peak Mono Hot Springs Camp 61 

Grano- Granodiorite inclusion diorite Inclusion Granodiorite Aggregate 

RL1-H RL2-I RL3-I MHa1-H MHa2-l MHb1-H MHb3-H MHb4-A MHbS-A 

Quartz 26.8 1.7 3.7 26.2 4.2 21.2 24.7 15.7 14.4 

K-feldspar 12.3 3.3 2.7 16.8 5.5 19.6 20.5 12.2 19.1 

Plagioclase 49.1 56.1 53.6 39.9 52.9 44.5 39.3 32.7 35.4 

Biotite 8.7 20.1 32.9 8.2 8.0 8.3 9.0 18.3 14.2 

Hornblende 2.1 16.5 6.0 7.6 28.3 5.0 5.3 16.9 12.2 

Sphene } } } } } } } 1.8 1.1 

Opaque 1.0 1.5 1.1 1.3 1.1 1.4 1.2 2.2 1.6 

Other -- 0.2 _LQ -- -- Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 

Mount Givens Granodiorite-Continued 

Camp 6l-Continued 

Inclusion 

MHb6-l MHb7-l MHb8-l MHb9a-lm MHb9b-lc MHb10-l MHb11-l MHb12-l MHb15-l 

Quartz 4.8 2.3 4.5 0.3 2.3 1.8 12.5 7.8 16.6 

K-feldspar 0 0.4 10.5 0 0 0 0.4 0.4 0.8 

Plagioclase 51.4 55.2 25.6 47.9 55.3 44.9 54.7 58.6 50.4 

Biotite 22.3 20.9 31.7 17.6 18.2 18.3 19.3 20.9 16.7 

Hornblende 20.6 19.4 26.7 32.3 22.9 33.6 10.6 10.4 13.7 

Sphene } } } } } } 0.7 0.3 } Opaque 0.9 1.8 1.0 1.9 1.3 1.4 1.1 1.2 1.8 

Other 0.7 0.4 -- -- -- -- -- Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 

Mount Givens Granodiorite-Continued 

Courtright Reservoir 

Aggregate Inclusion 

CR3a-A CR4-A CRS-A CR3b-l CR6-I CRB-1 CR10-I 

Quartz 18.0 24.0 6.4 7.2 2.7 0.6 2.1 

K-feldspar 0 3.4 9.8 4.4 0.9 0 1.6 

Plagioclase 35.9 34.8 28.6 42.0 53.8 50.9 38.5 

Biotite 37.6 26.8 39.9 8.4 19.8 16.7 5.3 

Hornblende 5.0 7.4 9.2 36.0 18.2 29.6 51.6 

Sphene 1.6 1.6 3.2 } 2.5 0.7 } Opaque 1.4 1.4 2.5 2.0 0.9 1.2 0.9 

Other 0.5 _____!!:§ 0.4 1.2 0.3 -- -- Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 

*Includes clinopyroxene. 

Figures 1-4; Tables 1 -8 11 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite 

[Chemical analyses by A.J. Bartel, K Stewart, J. Taggart, H. Neiman, E. Engleman, M. Maneer, C. Stone, G. Mason, J. Ryder, and L. Espos using 

a combination of X-ray fluorescence and chemical methods. Trace-element analyses by P. Bruggman, J. Budahn, R. Knight, L.J. Schwartz, J. Storey, 

S. Danahey, R.B. Vaughn, J.G. Crock, J. Consul, and R. Lerner using X-ray fluorescence, instrumental neutron-activation, delayed neutron, 

induced coupled plasma, or emission-spectrographic methods. -,no data.] 

Bass Lake Tonalite 

Hetch Hetchy 

Tonalite Aggregate Inclusion Dike rock 

HH1-H HH2-A HH3-A HH4-I HHSa-D HHSb-D HHSc-D HHSd-D HH6a-D HH6b-D 

Chemical analyses (weight percent) 

Si02 66.9 57.2 59.4 50.4 51.9 53.4 56.2 57.2 53.1 54.4 

~03 15.2 17.5 17.0 19.1 18.8 18.3 17.6 17.5 18.4 17.7 

Fe2

0 3 1.49 2.32 2.33 3.38 2.76 2.55 2.48 2.47 2.51 2.61 

FeO 2.27 4.52 4.13 6.05 5.37 5.09 4.72 4.40 5.3 5.22 

MgO 1.51 3.20 2.93 4.44 4.11 3.81 3.66 3.38 4.17 4.01 

CaO 3.62 6.59 6.07 7.81 7.80 7.55 7.11 6.95 8.15 7.74 

Na2

0 2.96 3.28 3.24 3.71 3.72 3.61 3.57 3.46 3.68 3.51 

~0 3.47 2.03 1.89 2.07 1.98 2.05 1.86 1.78 1.71 1.62 

H20+ 0.38 0.73 0.72 1.03 0.94 0.94 0.88 0.85 0.93 1.00 

H20- 0.19 0.20 0.20 0.22 0.25 0.25 0.24 0.25 0.22 0.19 

Ti02 0.50 0.91 0.85 1.11 1.43 1.33 1.19 1.08 1.18 1.18 

P20s 0.12 0.23 0.22 0.29 0.38 0.35 0.25 0.25 0.23 0.19 

MnO 0.06 0.13 0.12 0.19 0.16 0.13 0.12 0.11 0.15 0.14 

C02 <0.02 0.07 0.06 0.07 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 

Total 98.7 98.9 99.2 99.9 99.6 99.4 99.9 99.7 99.7 99.5 

Trace-element analyses (parts per million) 

Rb 103. 65.3 68.8 86.1 74.1 63.8 61.3 54.9 58.1 61.8 

Sr 360. 488. 455. 486. 665. 654. 619. 595. 580. 569. 

Cs 

Ba 1544. 707. 591. 423. 507. 721. 648. 617. 582. 576. 

La 18.4 37.4 19.0 21.9 21.7 24.5 23.9 23.5 23.7 20.9 

Ce 35.9 78.3 40.1 54.1 50.8 53.6 48.8 48.3 49.3 42.8 

Pr 1.0 3.5 3.5 4.8 3.6 0.6 1.7 1.5 2.0 1.0 

Nd 13.9 38.4 24.0 34.6 31.5 30.0 24.7 24.6 25.3 21.4 

Sm 1.3 5.4 3.8 5.9 4.0 1.5 1.7 1.5 1.8 1.3 

Eu 1.00 1.82 1.51 1.96 2.14 2.11 1.63 1.60 1.79 1.51 

Gd 2.5 8.0 5.6 8.1 6.0 5.9 5.0 4.9 5.4 5.0 

Tb 0.4 0.9 0.7 1.0 0.6 0.7 0.7 0.6 0.5 0.5 

Dy 1.6 6.9 4.6 7.1 4.0 4.1 3.6 3.5 4.2 4.1 

Ho 0.34 1.35 0.91 1.38 0.71 0.69 0.66 0.68 0.79 0.77 

Er 1.0 3.5 2.5 3.8 1.7 1.5 1.6 1.6 2.0 2.2 

Tm 0.07 0.54 0.31 0.52 0.20 0.22 0.20 0.20 0.25 0.27 

Yb 1.23 3.25 2.30 3.58 1.48 1.35 1.45 1.48 1.90 1.76 

Lu 0.18 0.47 0.33 0.50 0.18 0.15 0.18 0.19 0.25 0.26 

y 12. 28. 21. 29. 18. 17. 16. 15. 21. 19. 

Zr 134. 164. 119. 152. 145. 137. 131. 123. 132. 118. 

Hf 

Nb 3. 7. 8. 8. 7. 7. 5. 5. 6. 3. 

Ta 

Th 12.8 10.9 4.5 4.6 3.99 5.76 5.76 5.00 4.4 6.16 

u 3.19 1.80 3.03 2.73 1.80 3.21 2.29 3.33 2.55 2.38 

Sc 7.5 22. 18. 24. 18. 16. 19. 17. 23. 24. 

v 57. 130. 120. 170. 180. 160. 180. 160. 200. 220. 

Cr 

Co 8. 19. 16. 22. 22. 22. 23. 19. 23. 25. 

Zn 

Sb 

12 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Ta.ble 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite-Continued 

Bass lake Tonalite-Continued 

Meadow 

Hetch Hetchy---Continued North Fork lakes 

Dike rock Aplite Tonalite Inclusion Dike rock Gabbro Tonalite 

HH6c-D HH6d-D HH6e-AP NF1-H NF2-I NF3-I NF4a-D NF4b-D NFS-G Mll-H 

Chemical analyses (weight percent) 

Si02 54.3 58.4 72.5 63.6 51.3 51.2 49.6 48.4 58.6 62.4 

A4_03 18.1 17.4 14.0 16.8 17.9 18.2 20.1 19.8 14.8 16.9 

Fe2

0 3 2.30 2.44 0.81 1.12 2.00 2.12 1.33 1.73 2.21 1.48 

FeO 5.20 4.23 0.92 3.30 7.55 7.35 6.64 7.35 5.59 3.56 

MgO 3.93 3.11 0.55 2.04 4.62 4.47 4.22 4.78 4.66 2.24 

CaO 7.71 6.59 2.25 5.13 8.31 7.59 10.0 9.43 7.95 5.59 

N~O 3.34 3.70 2.42 3.43 3.46 3.34 2.62 3.16 2.22 3.44 

~0 1.77 1.62 4.93 1.88 1.75 2.15 1.40 1.46 1.53 1.97 

H20+ 0.96 0.78 0.27 0.79 1.17 1.30 1.15 1.30 1.03 0.73 

H20- 0.22 0.18 0.16 0.19 0.24 0.25 0.31 0.30 0.20 0.05 

Ti02 1.12 0.98 0.23 0.53 0.77 0.85 1.71 1.26 0.60 0.86 

P20S 0.25 0.21 0.06 0.11 0.13 0.17 0.44 0.32 0.21 0.19 

MnO 0.11 0.13 0.07 0.22 0.19 0.10 0.14 0.17 0.08 

C02 <0.02 <0.02 <0.02 0.02 0.06 0.02 0.02 0.02 0.03 0.03 

Total 99.3 99.8 99.1 99.0 99.5 99.2 99.6 99.5 99.8 99.5 

Trace-element analyses (parts per million) 

Rb 54.4 68.8 90.1 66.5 61.7 87.8 34.3 40.6 43.9 64. 

Sr 637. 525. 385. 276. 245. 253. 769. 620. 450. 513. 

Cs 2.61 2.55 3.75 0.94 0.77 1.86 

Ba 657. 419. 1693. 587. 336. 438. 519. 556. 588. 718. 

La 25.7 24.6 35.8 11.8 12.5 15.3 17.5 15.4 14.0 

Ce 52.3 47.4 63.4 25.3 37.0 44.2 45.4 39.1 29.7 

Pr 1.8 2.2 4.3 2.8 5.1 5.2 5.7 4.8 3.3 

Nd 26.6 22.6 22.8 13.0 29.5 25.4 30.2 24.4 14.7 

Sm 1.9 2.1 2.0 3.1 8.3 6.9 6.6 5.7 3.8 

Eu 1.65 1.54 0.90 0.93 1.48 1.34 1.87 1.72 1.13 

Gd 5.3 4.8 3.2 3.6 9.7 7.7 5.6 5.2 3.9 

Tb 0.6 0.7 0.2 0.6 1.6 1.3 0.8 0.9 0.6 

Dy 3.9 3.6 2.4 3.4 10.6 8.7 4.4 5.1 4.3 

Ho 0.72 0.73 0.45 0.78 2.46 1.90 0.89 1.07 0.95 

Er 1.7 1.9 1.2 2.2 7.1 5.6 2.2 2.8 2.6 

Tm 0.20 0.22 0.16 0.33 1.08 0.84 0.27 0.38 0.38 

Yb 1.44 1.83 1.35 2.04 6.75 5.56 1.54 2.20 2.20 

Lu 0.35 0.25 0.19 0.30 1.01 0.85 0.20 0.32 0.31 

y 18. 17. 15. 19. 48. 38. 17. 23. 21. 20. 

'Z:r 128. 122. 127. 95. 106. 92. 57. 104. 91. 162. 

Hf 3.18 3.57 3.09 1.40 2.72 1.96 

Nb 6. 8. 6. 3. 6. 7. 9. 6. 6. 10. 

Ta 0.576 0.578 0.591 0.554 0.394 0.324 

Th 4.22 7.94 17.9 5.47 3.36 6.96 2.12 0.96 2.98 

u 0.78 4.78 4.00 3.08 0.879 1.08 0.681 0.545 0.969 

Sc 17. 18. 3. 13.8 38.2 31.5 19.0 26.1 33.3 

v 160. 170. 20. 

Cr 16.2 57.2 32.3 11.0 22.1 88.5 

Co 20. 20. 3. 12.1 24.3 24.9 22.8 25.0 25.5 

Zn 

Sb 0.169 0.084 0.16 

Figures 1-4; Tables 1-8 13 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, 

associated gabbroid, and aplite-Continued 

Bass Lake TonaliteContinued Dinkey Creek Granodiorite 

Meadow Stevenson 

Lakes- Creek Shaver Lake quarry 

Continued 

Inclusion Dike rock Granodiorite Inclusion 

ML2-I SC1-D SQ1-H SQ2-H SQ3-I SQ4-I SQS-1 SQ6-I SQ7-I SQS-1 SQ9-I 

Chemical analyses (weight percent) 

Si02 48.7 54.4 66.6 65.1 52.2 63.2 51.3 57.1 54.6 58.3 56.6 

A~03 18.5 18.3 15.1 15.3 17.8 15.6 17.8 17.1 17.4 15.7 17.6 

Fe2

0 3 2.91 1.87 1.16 1.53 2.54 1.74 2.98 2.35 2.42 2.31 2.62 

FeO 7.37 5.78 2.82 3.12 6.71 4.14 7.22 5.38 5.99 5.63 5.67 

MgO 4.51 3.95 1.58 1.76 4.16 2.77 4.26 3.25 3.85 3.62 2.87 

CaO 8.56 7.55 3.87 4.49 7.81 5.65 7.50 6.80 7.42 6.46 5.78 

N~O 3.61 3.19 2.70 2.96 3.51 3.18 3.52 3.44 3.46 3.11 3.62 

~0- 1.64 1.66 4.03 3.04 1.91 1.88 2.21 1.86 1.82 1.88 2.36 

H20+ 1.20 0.97 0.58 0.60 1.12 0.72 1.14 0.86 0.88 0.81 0.88 

H20 0.06 0.18 0.04 0.16 0.05 0.22 0.28 0.20 0.24 0.22 0.20 

Ti02 1.99 1.12 0.55 0.64 1.12 0.82 1.16 1.01 1.05 0.96 1.28 

P20S 0.39 0.22 0.12 0.14 0.23 0.17 0.21 0.22 0.21 0.20 0.30 

MnO 0.21 0.15 0.06 0.08 0.18 0.10 0.21 0.14 0.16 0.15 0.12 

C02 0.05 0.07 0.04 <0.02 0.06 <0.02 0.08 0.13 0.07 0.08 0.08 

Total 99.7 99.4 99.3 98.9 99.4 100.2 99.9 99.8 99.6 99.4 100.0 

Trace-element analyses (parts per million) 

Rb 56. 64. 132. 125. 103. 101. 142. 110. 96.4 161. 110. 

Sr 483. 455. 310. 330. 336. 328. 292. 321. 344. 321. 281. 

Cs - Ba 460. 457. 954. 755. 324. 323. 358. 359. 336. 321. 299. 

La 14.0 21.2 13.9 18.5 15.2 18.9 26.8 12.7 

Ce 29.5 45.7 34.9 54.1 41.2 53.7 57.0 35.8 

Pr 2.0 5.0 3.9 7.9 3.9 6.4 5.9 5.2 

Nd 17.9 21.9 19.7 39.0 29.4 36.3 26.7 25.0 

Sm 1.8 3.9 3.5 8.1 5.3 6.6 4.8 5.6 

Eu 1.49 1.18 1.13 1.70 1.46 1.70 1.19 1.19 

Gd 4.9 4.6 4.5 10.2 7.4 7.9 5.5 6.4 

Tb 0.4 0.6 0.6 2.0 1.1 1.3 0.7 1.0 

Dy 3.8 3.4 2.3 9.3 6.5 7.0 3.9 5.2 

Ho 0.68 0.74 0.64 1.85 1.28 1.38 0.77 1.01 

Er 1.7 1.9 1.7 5.7 3.6 3.8 1.9 3.0 

Tm 0.17 0.20 0.14 0.74 0.48 0.52 0.27 0.42 

Yb 1.59 1.96 1.73 4.77 3.33 3.72 1.78 2.97 

Lu 0.19 0.29 0.26 0.79 0.49 0.54 0.25 0.41 

y 31. 17. 21. 22. 40. 21. 37. 27. 31. 21. 28. 

Zr 167. 109. 116. 143. 180. 137. 152. 134. 152. 176. 130. 

Hf 

Nb 19. 5. 8. 9. 14. 10. 16. 10. 13. 11. 13. 

Ta 

Th 6.5 6.41 4.5 4.1 10.4 4.5 

u 1.7 4.18 3.21 3.84 4.79 1.51 2.17 2.97 

Sc 19. 10. 14. 30. 19. 22. 18. 18. 

v 140. 80. 108. 190. 130. 170. 145. 125. 

Cr 

Co 21. 12. 16. 21. 17. 22. 17. 17. 

Zn 

Sb 

14 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite-Continued 

Dinkey Creek Granodiorite--Continued 

Shaver Lake quarry-Continued Camp Sierra Markwood Creek Deer Creek 

Grano- Grano- GranoInclusion Dike rock diorite Inclusion diorite Inclusion diorite 

SQ10- I SQ12-aD SQ12-Dx SQ12-Di CS1-H CS2-I CS3-I MK1-H MK2-I DRl-aH 

Chemical analyses (weight percent) 

Si02 50.6 53.9 52.6 54.4 62.4 60.5 59.2 63.3 50.1 57.2 

~03 18.7 14.1 17.6 13.1 16.2 16.8 17.6 16.2 17.4 17.3 

~~3 2.90 3.51 2.81 3.37 1.46 2.12 1.79 1.76 3.19 2.27 

6.84 8.18 7.19 8.94 4.34 4.80 4.52 3.47 7.66 5.09 

MgO 4.03 4.61 3.98 4.81 2.30 2.15 2.41 2.16 4.83 3.57 

CaO 7.14 6.28 6.88 5.73 5.22 5.46 6.19 5.06 8.32 7.26 

N~O 3.63 2.57 3.65 2.21 2.98 3.50 3.52 3.19 3.35 2.98 

KzO 2.52 2.97 2.39 3.32 2.58 1.93 1.87 2.59 1.86 1.73 

H20+ 1.14 1.16 0.93 1.18 0.73 0.69 0.79 0.79 1.20 0.82 

H20- 0.23 0.24 0.20 0.20 0.13 0.11 0.16 0.10 0.14 0.15 

Ti02 1.27 1.39 1.25 1.57 0.80 1.00 0.92 0.73 1.16 1.03 

~0 0.29 0.30 0.27 0.33 0.17 0.31 0.20 0.16 0.23 0.23 

0.18 0.24 0.20 0.24 0.09 0.08 0.09 0.09 0.22 0.13 

C02 0.11 <0.02 <0.02 0.07 0.01 0.01 0.01 0.07 0.09 0.14 

Total 99.6 99.5 100.0 99.5 99.4 99.5 99.3 99.7 99.8 99.9 

Trace-element analyses (parts per million) 

Rb 169. 161. 156. 196. 105. 96. 86. 100. 91. 62.6 

Sr 330. 207. 276. 180. 378. 424. 431. 369. 318 .. 471. 

Cs 

Ba 237. 443. 316. 542. 760. 506. 573. 764. 255. 516. 

La 74.1 26.1 170.0 28.9 16.9 

Ce 155.0 64.7 322.0 60.3 41.0 

Pr 18.8 9.7 33.1 7.7 

Nd 73.7 40.8 118.0 31.6 26.9 

Sm 15.0 9.9 18.3 5.1 

Eu 2.03 1.66 2.34 1.71 1.76 

Gd 14.3 9.9 17.0 7.1 

Tb 2.2 1.6 2.5 1.1 

Dy 12.8 9.1 12.6 5.2 

Ho 2.46 1.79 2.65 1.01 1.17 

Er 6.8 5.1 7.0 2.8 

Tm 0.99 0.73 0.90 0.30 0.44 

Yb 6.49 4.73 6.92 2.55 2.60 

Lu 0.91 0.71 0.99 0.41 0.36 

y 33. 56. 40. 57. 27. 21. 23. 28. 47. 23. 

Zr 177. 266. 184. 304. 191. 145. 162. 146. 146. 136. 

Hf 

Nb 16. 22. 19. 25. 9. 8. 7. 10. 15. 9. 

Ta 

Th 41.5 11.2 67.5 7.47 3.00 

u 7.44 4.49 8.33 3.22 1.20 

Sc 40. 30. 40. 22. 48. 

v 210. 180. 225. 160. 300. 

Cr 

Co 22. 20. 24. 18. 25. 

Zn 

Sb 

Figures 1-4; Tables 1-8 15 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite-Continued 

Dinkey Creek Granodiorite-Continued Granodiorite of Red Lake 

Deer Creek-Continued Wishon Reservoir Chinese Peak 

Grano- GranoAggregate Inclusion diorite Aggregate Inclusion diorite Inclusion 

DR2-S DR3-I DR4a-l DRS-I WR1-H WR2-A WR3-I RL1-H RL2-1 RL3-I 

Chemical analyses (weight percent) 

Si02 55.6 48.3 46.1 49.1 60.8 56.0 48.1 69.3 52.7 53.0 

~03 15.5 18.4 19.9 20.0 16.0 13.4 17.8 15.2 18.2 18.6 

~~3 3.00 3.42 3.52 1.81 1.46 3.20 2.82 1.16 2.67 2.54 

6.57 6.82 7.63 6.74 4.64 7.29 8.44 1.58 5.78 4.91 

MgO 4.94 5.29 5.18 6.77 2.80 5.03 5.06 0.94 4.10 3.51 

CaO 7.14 10.20 10.80 10.90 6.07 6.40 8.38 3.20 5.99 6.81 

N~O 2.46 1.90 2.42 2.23 2.92 2.02 3.02 3.58 4.21 4.29 

~0- 2.03 1.27 0.46 0.51 2.25 3.14 2.47 2.90 2.62 2.11 

H20+ 1.29 1.98 1.54 1.15 0.77 1.38 1.38 0.37 1.12 0.99 

H20 0.31 0.31 0.22 0.19 0.05 0.26 0.10 0.04 0.19 0.24 

Ti02 1.32 1.50 1.60 0.57 0.88 1.36 1.35 0.42 1.12 1.30 

~0 0.29 0.28 0.31 0.12 0.19 0.28 0.44 0.14 0.31 0.42 

0.17 0.15 0.19 0.18 0.10 0.21 0.20 0.04 0.20 0.19 

C02 <0.02 0.32 0.25 <0.02 0.03 0.09 0.07 0.04 0.06 <0.02 

Total 100.6 100.1 100.1 100.3 99.0 100.1 99.6 98.9 99.3 98.9 

Trace-element analyses (parts per million) 

Rb 50.6 76.6 15.4 13.1 96.1 124. 1240. 93. 125. 95. 

Sr 471. 382. 578. 575. 402. 257. 380. 572. 552. 539. 

Cs 4.23 7.4 1.69 8.24 

Ba 290. 550. 158. 186. 573. 732. 431. 1156. 1016. 556. 

La 31.3 18.5 14.6 30.1 76.0 23.8 29.4 15.8 31.9 

Ce 71.8 44.4 34.0 57.2 144.0 61.1 52.0 29.4 68.0 

Pr 5.2 10.0 6.0 4.9 13.2 5.5 3.8 5.4 

Nd 39.8 28.2 19.9 27.0 64.7 40.0 23.0 21.0 32.0 

Sm 6.7 8.5 5.8 4.3 5.7 9.7 8.4 3.9 3.7 3.8 

Eu 1.64 1.85 1.59 1.17 2.23 1.52 0.82 0.81 2.38 

Gd 7.3 8.1 6.4 4.2 4.8 12.6 8.0 3.6 4.0 5.5 

Tb 1.2 1.1 1.0 0.7 0.7 2.0 1.2 0.3 0.4 0.8 

Dy 6.4 7.0 5.6 3.5 10.5 1.7 2.4 3.4 

Ho 1.33 1.10 0.68 2.03 0.35 0.52 0.61 

Er 3.2 3.7 3.1 1.9 5.5 0.9 1.4 1.4 

Tm 0.54 0.45 0.26 0.32 0.69 0.47 0.12 0.19 

Yb 3.56 2.89 1.76 2.22 5.21 3.52 0.91 1.22 1.45 

Lu 0.50 0.44 0.29 0.36 0.73 0.52 0.13 0.21 0.22 

y 26. 31. 27. 18. 26. 38. 37. 14. 17. 17. 

Zr 77. 149. 51. 92. 143. 185. 162. 162. 166. 156. 

Hf 4.95 4.71 3.98 4.58 

Nb 9. 11. 11. 5. 13. 14. 12. 8. 10. 10. 

Ta 1.48 1.07 0.65 0.59 

Th 5.56 17.8 17.9 3.58 10.9 3.31 8.05 

u 2.37 0.367 0.443 6.2 7.68 2.6 1.92 3.3 3.14 

Sc 29. 34. 14. 16.6 32. 29.6 3.53 21.1 13. 

v 200. 250. 85. 7.68 160. 

Cr 15.8 87.1 3.4 19.9 

Co 24. 26. 29. 14.8 25. 31.7 4.13 19.2 18. 

Zn 82. 163. 56. 212. 

Sb 0.45 0.58 0.20 1.51 

16 Mafic Inclusions, Aggregates, and Dikes In Granitoid Rocks, California 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite-Continued 

Mount Givens Granodiorite 

Camp 61 

Granodiorite Inclusion Granodiorite Aggregate Inclusion 

MHal-H MHa2-l MHbl-H MHb2-H MHb3-H MHb4-A MHbS-A MHb6-l MHb7-l MHb8-l 

Chemical analyses (weight percent) 

Si02 64.7 52.3 66.9 67.1 66.6 54.9 61.7 55.3 53.4 52.0 

A~03 15.9 17.6 15.4 15.2 15.1 13.3 15.4 17.0 17.6 17.1 

Fe20 3 1.58 3.12 1.54 1.71 1.72 4.74 2.61 2.08 3.70 2.47 

FeO 2.52 5.95 2.13 2.01 2.15 6.53 3.49 5.51 5.18 5.67 

MgO 1.74 4.55 1.55 1.53 1.60 5.08 2.76 4.63 3.98 5.48 

CaO 4.60 7.91 3.78 3.76 3.96 4.80 4.66 6.69 6.~0 5.72 

N~O 3.25 3.91 3.26 3.18 3.36 2.24 3.26 3.90 4.47 3.63 

~0- 2.79 1.61 3.60 3.56 3.08 3.93 3.31 2.00 1.42 3.93 

H20+ 0.48 0.95 0.43 0.53 0.51 1.26 0.72 0.83 1.26 1.21 

H20 0.04 0.07 0.03 0.14 0.25 0.18 0.16 0.03 0.06 0.08 

Ti02 0.54 0.96 0.57 0.53 0.62 1.38 0.78 0.99 0.80 0.99 

~05 0.14 0.20 0.16 0.16 0.16 0.35 0.22 0.26 0.25 0.42 

nO 0.07 0.23 0.06 0.06 0.06 0.23 0.13 0.21 0.21 0.21 

C02 0.04 0.04 0.04 <0.02 <0.02 <0.02 <0.02 0.03 0.09 0.05 

Total 98.4 9".4 99.5 99.5 99.2 98.9 99.2 99.5 99.3 99.0 

Trace-element analyses (parts per million) 

Rb 116. 94. 130. 129. 126. 207. 142. 141. 77. 291. 

Sr 431. 376. 414. 425. 434. 262. 387. 356. 40?. 360. 

Cs 6.79 13.8 4.04 19.8 

Ba 616. 195. 764. 863. 732. 845. 630. 359. 281. 611. 

La 28.4 35.2 54.3 64.7 45.9 25.2 25.0 33.9 

Ce 54.5 60.2 93.0 123.0 86.2 58.6 56.0 61.2 

Pr 5.8 3.9 8.1 13.6 8.5 6.3 7.0 6.5 

Nd 25.0 23.0 34.1 56.6 39.2 27.0 37.0 28.0 

Sm 4.6 1.6 3.8 10.1 6.4 7.2 8.7 5.9 

Eu 0.88 1.05 1.29 1.69 1.44 1.08 1.27 0.80 

Gd 4.2 4.1 5.5 10.3 7.3 6.4 6.4 5.3 

Tb 0.4 0.4 0.6 1.5 1.1 0.9 1.2 0.8 

Dy 2.7 2.7 3.3 8.2 5.7 5.1 6.7 4.5 

Ho 0.60 0.56 0.68 1.56 1.09 0.98 1.33 0.95 

Er 1.7 1.4 1.7 4.1 2.9 2.2 3.2 2.5 

Tm 0.24 0.14 0.14 0.56 0.37 0.25 0.39 0.33 

Yb 1.52 1.49 1.81 4.06 2.86 2.35 2.76 2.26 

Lu 0.25 0.21 0.26 0.61 0.42 0.39 0.42 0.35 

y 23. 42. 22. 21. 18. 38. 27. 31. 32. 31. 

Zr 123. 141. 136. 130. 129. 266. 184. 151. 111. 225. 

Hf 4.52 4.68 3.84 5.19 

Nb 5. 15. 10. 8. 7. 20. 12. 11. 14. 8. 

Ta 1.31 1.09 1.15 0.96 

Th 24.1 22.3 21.1 38.2 27.6 8.25 8.77 7.83 

u 5.6 5.00 4.30 10.20 9.20 8.1 15.8 4.1 

Sc 7.82 7.5 6.5 30. 20. 28.8 35.9 22.4 

v 66. 64. 190. 100. 

Cr 9.4 83.2 30.2 92.9 

Co 8.14 9. 9. 23. 13. 25.8 23.0 28.2 

Zn 57. 161. 165. 188. 

Sb 0.67 0.44 1.42 0.50 

Figures 1-4; Tables 1-8 17 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite-Continued 

Mount Givens Granodiorite--Continued 

Camp 61-Continued Courtright Reservoir 

GranoInclusion-Continued diorite Aggregate 

MHb9a-lm MHb9b-lc MHbl0-1 MHb11-l MHb12-l MHb13-l MHb14-l MHblS-1 CR1-H CR2a-A 

Chemical analyses (weight percent) 

Si02 50.6 54.5 50.8 56.7 55.3 52.2 50.4 59.2 65.5 61.2 

A~03 17.8 17.2 17.7 17.1 17.6 17.1 20.0 17.3 17.0 15.5 

Fe20 3 2.89 2.40 2.86 2.56 3.26 3.79 3.45 2.10 0.80 2.04 

FeO 6.40 5.22 6.13 4.76 4.48 5.24 5.54 3.97 2.01 3.95 

MgO 5.33 4.65 5.42 3.86 3.65 5.55 3.77 3.08 0.95 2.70 

CaO 6.87 7.23 7.41 5.39 7.03 6.60 6.55 5.93 2.73 4.07 

N~O 3.89 4.07 3.95 3.79 4.19 3.98 4.74 4.09 3.39 3.00 

~0- 2.53 1.67 2.18 2.23 1.35 2.25 2.26 1.49 5.95 4.02 

H20+ 1.27 1.05 1.20 1.13 0.97 1.24 1.07 0.78 0.43 0.80 

H20 0.30 0.19 0.18 0.18 0.26 0.21 0.19 0.21 0.17 0.19 

Ti02 1.23 1.10 1.24 0.96 1.00 1.07 1.25 0.82 0.47 1.13 

P20s 0.37 0.32 0.37 0.24 0.25 0.27 0.47 0.20 0.14 0.33 

MnO 0.23 0.20 0.23 0.16 0.17 0.25 0.16 0.13 0.06 0.10 

C02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 <0.02 0.06 

Total 99.7 99.8 99.7 99.1 99.5 99.8 99.9 99.3 99.6 99.1 

Trace-element analyses (parts per million) 

Rb 167. 103. 172. 177. 78.8 210. 193. 98.1 184. 120. 

Sr 362. 364. 375. 419. 426. 329. 410. 403. 484. 533. 

Cs 

Ba 484. 370. 355. 379. 362. 377. 293. 293. 3161. 2622. 

La 35.8 40.6 40.0 21.1 42.0 27.3 49.6 25.6 36.6 56.6 

Ce 70.3 84.5 89.6 37.5 85.2. 55.2 89.5 50.2 57.9 122.0 

Pr 5.5 5.2 8.3 1.2 4.4 7.0 5.8 3.8 4.8 12.5 

Nd 36.7 38.6 47.4 16.3 30.2 28.4 33.9 25.2 18.4 52.4 

Sm 6.0 4.5 7.4 1.6 1.0 6.1 3.0 3.2 1.7 7.5 

Eu 1.29 1.43 1.67 0.85 1.48 1.00 1.29 1.02 0.94 2.12 

Gd 8.9 8.3 10.2 4.3 5.6 6.0 5.7 5.3 3.3 7.0 

Tb 1.1 0.9 1.2 0.6 0.6 0.8 0.8 0.7 0.2 1.0 

Dy 6.1 6.1 7.6 2.8 4.1 4.4 4.2 4.2 0.8 4.6 

Ho 1.15 1.17 1.41 0.54 0.81 0.84 0.79 0.75 0.15 0.83 

Er 2.9 3.0 3.7 1.3 2.0 2.2 1.9 1.9 0.4 2.0 

Tm 0.33 0.40 0.47 0.11 0.29 0.28 0.23 0.21 <0.05 0.25 

Yb 2.38 2.93 3.32 1.31 2.32 1.92 1.89 1.67 0.38 1.87 

Lu 0.33 0.41 0.45 0.18 0.38 0.36 0.30 0.28 0.04 0.26 

y 30. 28. 33. 18. 22. 23. 21. 21. 12. 22. 

Zr 160. 145. 140. 73. 154. 110. 173. 131. 130. 161. 

Hf 

Nb 12. 13. 13. 6. 16. 10. 10. 6. 4. 14. 

Ta 

Th 5.70 6.34 5.89 7.22 6.35 12.9 19.0 

u 3.26 4.23 3.33 6.13 9.99 5.74 6.39 2.74 2.55 3.05 

Sc 28. 20. 19. 20. 25. 26. 17. 16. 7.5 13. 

v 170. 164. 180. 118. 136. 160. 190. 110. 45. 110. 

Cr 

Co 25. 21. 26. 19. 18. 24. 23. 15. 7. 12. 

Zn 

Sb 

18 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Table 3. Chemical and trace-element analyses of mafic inclusions, aggregates, dikes, and their host granitoids, associated 

gabbroid, and aplite-Continued 

Mount Givens Granodiorite-Continued 

Courtright Reservoir-Continued 

Aggregate-Continued Inclusion Hornfels 

CR3a-A CR4-A CRS-A CR2b-l CR3b-l CR6-I CR7-I CRB-1 CR9-I CR12-I 

Chemical analyses (weight percent) 

Si02 56.6 57.8 51.9 55.0 56.8 53.5 52.3 51.4 54.2 54.6 

Alz03 14.2 14.0 14.1 18.4 13.6 18.1 18.6 17.8 18.0 16.5 

Fe2

0 3 2.81 2.99 5.23 2.78 2.93 3.64 3.49 3.25 2.72 1.05 

FeO 6.83 5.91 6.90 5.19 6.54 4.82 4.96 5.42 5.11 5.98 

MgO 4.42 3.84 5.28 3.44 5.30 4.12 4.15 5.13 4.18 2.57 

CaO 4.02 4.36 4.42 5.74 6.00 6.17 6.81 7.73 5.09 16.30 

N~O 2.48 2.55 2.25 4.21 2.81 4.29 4.57 4.42 4.24 0.94 

~0- 3.42 3.66 5.04 2.16 2.05 2.10 2.06 1.70 2.67 0.14 

H20+ 1.50 1.19 1.39 1.05 1.66 1.16 0.92 0.99 1.76 0.38 

H20 0.25 0.30 0.26 0.25 0.23 0.29 0.21 0.24 0.29 0.15 

Ti02 2.05 1.78 2.37 1.12 0.94 1.12 1.19 1.20 1.08 1.03 

P20s 0.55 0.54 0.71 0.37 0.11 0.34 0.42 0.34 0.31 0.33 

MnO 0.16 0.15 0.20 0.14 0.25 0.15 0.15 0.18 0.18 0.35 

C02 <0.02 0.09 <0.02 0.07 0.07 0.06 0.06 <0.02 0.09 <0.02 

Total 99.3 99.2 100.1 99.9 99.3 99.9 99.9 99.8 99.9 100.3 

Trace-element analyses (parts per million) 

Rb 163. 141. 286. 104. 84.8 115. 115. 101. 175. 3. 

Sr 390. 395. 330. 553. 352. 522. 516. 510. 512. 275. 

Cs 

Ba 1382. 1945. 1109. 739. 819. 332. 347. 249. 403. 66. 

La 79.0 83.2 96.5 28.3 23.5 38.7 41.9 41.0 31.8 30.6 

Ce 192.0 188.0 210.0 58.3 53.5 69.6 79.3 85.1 56.6 56.3 

Pr 21.4 21.8 24.6 5.3 6.9 5.4 4.4 7.4 5.3 6.0 

Nd 82.6 85.9 91.9 26.7 31.0 26.0 34.3 32.9 19.0 26.5 

Sm 12.5 13.3 14.3 3.5 6.1 2.9 3.0 5.0 3.4 5.4 

Eu 3.12 3.29 3.64 1.31 1.68 1.19 1.42 1.57 0.90 1.75 

Gd 10.6 12.5 11.6 4.5 6.4 4.9 5.7 5.9 3.5 6.8 

Tb 1.4 1.6 1.3 0.5 0.9 0.4 0.9 0.7 0.3 1.0 

Dy 6.3 8.2 7.4 2.8 4.1 2.4 3.7 3.5 2.1 6.3 

Ho 1.15 1.50 1.36 0.49 0.82 0.51 0.61 0.66 0.40 1.36 

Er 2.6 3.9 3.2 1.2 2.1 1.1 1.4 1.7 1.0 4.0 

Tm 0.22 0.45 0.37 0.13 0.26 0.05 0.17 0.20 0.15 0.60 

Yb 2.48 3.01 3.20 1.16 2.13 1.13 1.39 1.47 1.01 4.07 

Lu 0.32 0.48 0.46 0.16 0.33 0.19 0.18 0.21 0.15 0.56 

y 30. 33. 29. 16. 21. 14. 20. 17. 18. 34. 

Zr 289. 254. 312. 135. 101. 134. 193. 141. 136. 169. 

Hf 

Nb 23. 25. 21. 8. 7. 8. 12. 8. 9. 6. 

Ta 

Th 24.0 24.5 17.5 7.44 7.17 7.40 7.41 6.28 7.75 7.61 

u 5.80 4.36 9.72 3.07 2.56 3.28 3.80 2.45 4.96 4.04 

Sc 17. 18. 16. 13. 34. 16. 17. 23. 20. 27. 

v 250. 220. 215. 170. 175. 180. 165. 190. 185. 260. 

Cr 

Co 25. 23. 27. 16. 20. 20. 19. 24. 24. 17. 

Zn 

Sb 

Figures 1-4; Tables 1 -8 19 
Table 4. CIPW norms of mafic inclusions, aggregates, dikes, and their host granitoids, associated gabbroid, 

and aplite 

[tr, trace; -, not calculated] 

Bass lake Tonalite 

Hetch Hetchy 

Tonalite Aggregate Inclusion Dike rock 

HH1-H HH2-A HH3-A HH4-I HHSa-0 HHSb-0 HHSc-0 HHSd-0 HH6a-D HH6b-D HH6c-D HH6d-D 

Q 25.7 10.8 15.1 tr 2.9 7.7 10.3 1.6 5.2 5.3 11.7 

or 20.5 12.0 11.2 12.2 11.7 12.1 11.0 10.5 10.1 9.6 10.5 9.6 

ab 25.1 27.8 27.4 31.4 31.5 30.6 30.2 29.3 31.1 29.7 28.3 31.3 

an 17.2 27.0 26.3 29.4 28.8 27.7 26.5 27.0 28.6 27.8 29.2 26.1 

c 0.3 

di 3.0 1.7 5.8 6.1 6.1 5.8 4.8 8.4 7.6 6.1 4.3 

hy 6.0 11.6 11.0 3.9 12.8 11.8 11.2 10.7 12.3 12.0 12.8 10.1 

mt 2.2 3.4 3.4 4.9 4.0 3.7 3.6 3.6 3.6 3.8 3.3 3.5 

ne 

ol 8.1 

il 1.0 1.7 1.6 2.1 2.7 2.5 2.3 2.1 2.2 2.2 2.1 1.9 

ap 0.3 0.5 0.5 0.7 0.9 0.8 0.6 0.6 0.5 0.4 0.6 0.5 

cc 0.2 0.1 0.2 

Total 98.3 98.0 98.3 98.7 98.5 98.2 98.9 98.9 98.4 98.3 98.2 99.0 

Bass lake Tonalite-Continued Dinkey Creek Granodiorite 

Hetch 

Hetchy- North Fork 

Continued 

Meadow lakes Shaver lake quarry 

Aplite Tonalite Inclusion Dike rock Gabbro Tonalite Inclusion Granodiorite Inclusion ------

HH6e-AP NF1-H NF2-I NF3-I NF4a-D NF4b-D NFS-G Ml1-H Ml2-l SQ1-H SQ2-H SQ3-I 

Q 33.8 20.8 0.4 15.6 18.6 23.9 23.2 0.5 

or 29.1 11.1 10.3 12.7 8.3 8.6 9.0 11.6 9.7 23.8 18.0 11.3 

ab 20.5 29.0 29.3 28.3 22.2 26.7 18.8 29.1 30.6 22.9 25.1 29.7 

an 10.8 24.6 28.1 28.3 39.0 35.5 25.9 24.9 29.4 17.2 19.5 27.2 

c 0.7 0.1 

di 9.8 6.7 6.3 7.4 9.8 1.2 8.3 0.8 1.5 8.0 

hy 2.0 9.5 9.3 11.1 15.9 1.0 14.6 9.0 0.7 7.0 7.2 15.1 

mt 1.2 1.6 2.9 3.1 1.9 2.5 3.2 2.2 4.2 1.7 2.2 3.7 

ne 

ol 6.4 5.5 12.9 10.8 

il 0.4 1.0 1.5 1.6 3.3 2.4 1.1 1.6 3.8 1.0 1.2 2.1 

ap 0.1 0.3 0.3 0.4 1.0 0.7 0.5 0.4 0.9 0.3 0.3 0.5 

cc 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 

Total 98.6 98.1 98.0 97.8 98.4 97.8 98.6 98.7 98.5 98.7 98.2 98.2 

Dinkey Creek Granodiorite-Continued 

Stevenson Camp 

Shaver lake quarry-Continued Creek Sierra 

Granolncl usion-Conti nued Dike rock diorite 

SQ4-I SQS-1 SQ6-I SQ7-1 SQS-1 SQ9-I SQ1 0-1 SQ12a- SQ12a- SQ12a- SC1-D CS1-H 

D Di Ox 

Q 20.4 9.8 5.0 12.8 8.3 5.8 7.4 5.9 18.9 

or 11.1 13.1 11.0 10.8 11.1 14.0 14.9 17.6 14.1 19.6 9.8 15.3 

ab 26.9 29.8 29.1 29.3 26.3 30.6 30.7 21.8 30.9 18.7 27.0 25.2 

an 22.7 26.2 25.7 26.6 23.3 24.8 27.3 18.2 24.6 16.0 30.7 23.2 

c 

di 3.4 7.5 4.7 6.9 5.7 1.2 4.6 9.1 6.4 8.1 4.0 1.3 

hy 10.2 10.5 12.3 13.8 13.4 12.9 5.0 17.3 15.2 19.5 15.4 10.7 

mt 2.5 4.3 3.4 3.5 3.4 3.8 4.2 5.1 4.1 4.9 2.7 2.1 

ne 

ol 4.2 8.2 0.5 

il 1.6 2.2 1.9 2.0 1.8 2.4 2.4 2.6 2.4 3.0 2.1 1.5 

ap 0.4 0.5 0.5 0.5 0.5 0.7 0.7 0.7 0.6 0.8 0.5 0.4 

cc 0.2 0.3 0.2 0.2 0.2 0.3 0.2 0.2 tr 

Total 99.2 98.5 98.7 98.6 98.5 98.9 98.3 98.2 98.8 98.2 98.3 98.6 

20 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Table 4. CIPW norms of mafic inclusions, aggregates, dikes, and their host granitoids, associated gabbroid, 

and aplite-Continued 

Dinkey Creek Granodiorite-Continued 

Camp SierraContinued Markwood Creek Deer Creek Wishon Reservoir 

Grano- Grano- Grano- AggreInclusion diorite Inclusion diorite Aggregate Inclusion diorite gate Inclusion ------ CS2-I CS3-I MKl-H MK2-I DR1-H DR2-A DR3-I DR4-I DRS-I WR1-H WR2-A WR3-I 

Q 16.3 13.4 19.9 11.7 10.0 2.8 16.9 10.4 

or 11.4 11.1 15.3 11.0 10.2 12.0 7.5 2.7 3.0 13.3 18.6 14.6 

ab 29.6 29.8 27.0 28.4 25.2 20.8 16.1 20.5 18.9 24.7 17.1 24.1 

an 24.4 26.7 22.2 27.0 28.7 25.3 37.9 42.1 43.1 23.9 18.2 27.7 

c 

di 0.5 2.2 1.1 10.1 4.0 6.7 7.2 6.5 8.3 3.9 9.1 8.7 

by 10.7 10.4 8.7 7.6 12.9 16.7 17.2 13.6 17.9 11.1 17.0 

mt 3.1 2.6 2.6 4.6 3.3 4.4 5.0 5.1 2.6 2.1 4.6 4.1 

ne 0.8 

ol 6.9 3.7 3.8 14.4 

il 1.9 1.8 1.4 2.2 2.0 2.5 2.9 3.0 1.1 1.7 2.6 2.6 

ap 0.7 0.5 0.4 0.5 0.5 0.7 0.6 0.7 0.3 0.4 0.7 1.0 

cc tr tr 0.2 0.2 0.3 0.7 0.6 0.1 0.2 0.2 

Total 98.6 98.5 98.8 98.5 98.8 99.1 97.9 98.5 98.9 98.1 98.5 98.2 

Granodiorite of Red Lake Mount Givens Granodiorite 

Chinese Peak Mono Hot Springs Camp 61 

Grano- Granodiorite Inclusion diorite Inclusion Granodiorite Aggregate Inclusion ------ RL1-H RL2-1 RL3-I MHa1-H MHa2-l MHb1-H MHb2-H MHb3-H MHb4-A MHbS-A MHb6-l MHb7-l 

Q 29.0 0.2 22.2 23.6 24.6 24.5 8.6 16.0 3.1 1.5 

or 17.1 15.5 12.5 16.5 9.5 21.3 21.0 18.2 23.2 19.6 11.8 8.4 

ab 30.3 35.6 36.3 27.5 33.1 27.6 26.9 28.4 19.0 27.6 33.0 37.8 

an 14.7 23.0 25.3 20.6 25.7 16.8 16.7 17.0 14.6 17.6 23.0 23.8 

c 0.8 

di 3.5 4.7 0.9 9.8 0.6 0.7 1.3 5.6 3.3 6.8 6.7 

by 3.7 8.2 11.6 6.5 12.5 5.4 5.0 5.0 16.2 8.5 15.4 12.2 

mt 1.7 3.9 3.7 2.3 4.5 2.2 2.5 2.5 6.9 3.8 3.0 5.4 

ne 

ol 5.3 1.0 

il 0.8 2.1 2.5 1.0 1.8 1.1 1.0 1.2 2.6 1.5 1.9 1.5 

ap 0.3 0.7 1.0 0.3 0.5 0.4 0.4 0.4 0.8 0.5 0.6 0.6 

cc 0.1 0.1 0.1 0.1 0.1 0.1 0.2 

Total 98.5 97.9 97.8 97.9 98.5 99.1 98.8 98.5 97.5 98.5 98.8 97.9 

Mount Givens Granodiorite-Continued 

Camp 61-Continued Courtright Reservoir 

GranoInclusion diorite Aggregate 

MHb8-l MHb9a- MHb9b- MHb10-l MHb11-1 MHb12-l MHb13-l MHb14-l MHb15-l CR1-H CR2a-A CR3a-A 

lm lc 

Q 2.3 7.5 5.8 11.7 15.1 15.1 12.2 

or 23.2 15.0 9.9 12.9 13.2 8.0 13.3 13.4 8.8 35.2 23.8 20.2 

ab 30.5 32.4 34.4 33.4 32.1 35.5 33.7 35.2 34.6 28.7 25.4 21.0 

an 18.8 23.6 23.7 24.1 23.1 25.2 22.2 26.6 24.5 12.6 17.0 16.4 

c 0.4 0.4 

di 5.3 6.5 8.2 8.3 1.7 6.4 7.1 2.2 3.0 0.6 

by 13.8 0.2 14.1 10.2 9.6 10.7 4.7 10.3 18.1 

mt 3.6 4.2 3.5 4.2 3.7 4.7 5.5 5.0 3.0 1.2 3.0 4.1 

ne 0.1 0.3 2.7 

ol 13.2 13.0 12.0 4.3 10.1 

il 1.9 2.3 2.1 2.4 1.8 1.9 2.0 2.4 1.6 0.9 2.2 3.9 

ap 1.0 0.9 0.7 0.9 0.6 0.6 0.6 1.1 0.5 0.2 0.8 1.3 

cc 0.1 

Total 97.7 98.2 98.6 98.4 97.8 98.3 98.3 98.7 9"8.4 99.0 98.2 97.6 

Figures 1-4; Tables 1-8 21 
Table 4. CIPW norms of mafic inclusions, aggregates, dikes, and their host granitoids, 

associated gabbroid, and aplite-Continued 

Mount Givens Granodiorite-Continued 

Courtright Reservoir--Continued 

Aggregate Inclusion Hornfels 

CR4-A CRS-A CR2b-1 CR3b-l CR6-I CR7-1 CR8-I CR9-I CR12-I 

Q 13.4 28 3.6 10.7 12 0.8 14.9 

or 21.6 29.8 128 121 124 127 10.1 15.8 0.8 

ab 21.6 19.0 35.6 23.8 36.3 38.7 37.0 35.9 8.0 

an 16.0 13.5 24.9 18.4 23.9 24.6 23.7 22.2 40.4 

c 

di 1.3 3.1 0.6 8.3 3.3 5.3 10.0 0.4 30.9 

hy 14.7 16.5 13.9 17.7 13.0 4.2 15.9 

mt 4.3 7.6 4.0 4.3 5.3 5.1 4.7 3.9 1.5 

ne 0.2 

ol 5.9 9.8 

il 3.4 4.5 2.1 1.8 2.1 2.3 2.3 2.1 2.0 

ap 1.3 1.6 0.9 0.3 0.8 1.0 0.8 0.7 0.8 

cc 0.2 0.2 0.2 0.1 0.1 0.2 

Total 97.8 98.4 98.6 97.6 98.4 99.9 98.6 97.9 99.3 

22 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Table 5. Average chemical analyses, in weight percent, of biotite in mafic inclusions, dikes, aggregates, 

and their host granitoids 

[Chemical analyses by B. Barbarin using an electrort microprobe; n, number of analyzed spots included in average; at., 

atomic; FeO*, total iron as FeO; m, margin; c, core] 

Unit Bass Lake Tonalite Dinkey Creek Granodiorite 

locality North Fork (NF) Meadow Lakes (Ml) Shaver lake quarry (SQ) 

Sample No. 2 3 4a 4b 2 4a 

Description H D D H H A H 

n 6 6 7 5 5 4 4 6 5 6 5 4 

Si02 35.1 34.8 36.7 36.4 37.2 36.9 37.0 37.2 36.0 36.0 36.1 36.0 

Alp3 16.1 15.8 15.4 15.6 15.8 15.7 15.4 15.8 15.3 14.8 14.7 15.6 

FeO* 20.8 21.0 21.1 20.0 19.3 20.9 20.9 20.9 22.3 22.4 22.8 21.7 

MgO 9.78 9.70 9.94 10.24 11.25 9.87 9.51 10.18 9.24 9.87 9.54 9.65 

CaO 0.04 0.04 0.04 0.02 0.03 0.02 0.03 0.03 0.01 0.02 0.01 0.02 

N~O 0.08 0.09 0.09 0.14 0.09 0.09 0.10 0.09 0.07 0.07 0.07 0.07 

~0 9.47 9.34 9.51 9.52 9.42 9.50 9.45 9.46 9.43 9.45 9.48 9.66 

Ti02 3.17 3.38 3.21 3.93 3.14 3.07 3.53 291 3.45 3.25 3.47 3.13 

MnO 0.30 0.30 0.28 0.12 0.28 0.29 0.29 0.22 0.35 0.34 0.34 0.31 

Total 94.8 94.5 96.3 96.0 96.5 96.3 96.2 96.8 96.2 96.2 96.5 96.1 

at.Fe/Fe+Mg 0.54 0.55 0.54 0.52 0.49 0.54 0.55 0.54 0.58 0.56 0.57 0.56 

Unit Dinkey Creek GranodioritiK:ontinued 

locality Shaver Lake quarry (SQ)-Continued 

Sample No. 4a-Continued 4b 5 6 9 10 

Description A l(dark) l(light) H H H H 

n 9 3 4 4 3 7 4 6 3 7 4 7 

Si02 36.2 36.5 35.7 35.7 36.5 36.6 36.3 36.3 36.3 36.6 36.2 36.5 

Alp3 15.6 15.7 15.5 15.8 15.7 15.3 15.1 15.2 15.6 15.8 15.7 16.0 

FeO* 21.6 21.3 20.8 20.8 21.5 21.4 21.4 21.4 21.7 21.5 21.5 21.4 

MgO 9.15 9.93 9.94 10.20 9.40 9.79 9.35 9.74 9.68 9.86 9.46 9.90 

CaO 0.03 0.02 0.04 0.02 0.03 0.03 0.01 0.04 0.03 0.06 0.03 0.05 

N~O 0.07 0.08 0.07 0.07 0.08 0.09 0.08 0.07 0.08 0.08 0.07 0.08 

~0 9.72 9.86 9.56 9.51 9.61 9.50 9.39 9.36 9.33 9.24 9.30 9.25 

Ti02 3.17 3.05 3.36 2.74 3.20 283 3.35 3.08 2.95 2.88 3.20 2.50 

MnO 0.31 0.33 0.31 0.30 0.33 0.34 0.33 0.33 0.34 0.35 0.34 0.34 

Total 96.5 96.8 95.3 95.2 96.4 95.9 95.3 95.5 96.0 96.4 95.8 96.0 

at.Fe/Fe+Mg 0.55 0.55 0.54 0.53 0.56 0.55 0.56 0.55 0.56 0.55 0.56 0.55 

Unit Dinkey Creek Granodiorite-Continued 

locality Shaver lake quarry (SQ)-Continued Markwood Creek (MK) Deer Creek (DR) 

Sample No. 12 13 1 2 2 3 4 -- -- -- Description H H H H H A I H 

n 5 5 4 6 5 7 s 7 9 6 s 7 

Si02 36.1 36.1 36.2 36.4 36.0 36.4 36.3 36.3 36.9 37.2 36.9 37.3 

Alz03 15.7 15.7 15.7 15.6 15.9 16.0 15.7 15.6 15.2 16.0 15.4 15.7 

FeO* 21.7 21.6 21.8 21.6 22.2 22.4 22.2 20.4 20.1 19.6 19.6 18.0 

MgO 9.50 9.47 9.35 9.54 9.35 9.37 9.5 10.64 10.84 11.27 11.17 12.11 

CaO 0.01 0.02 0.01 0.02 0.03 0.01 0.01 0.01 0.03 0.02 0.03 0.05 

N~O 0.07 0.07 0.08 0.08 0.08 0.08 0.08 0.15 0.16 0.14 0.15 0.14 

KzO 9.15 9.76 9.78 9.78 9.39 9.58 9.55 9.44 9.42 9.47 9.50 9.55 

Ti02 3.23 3.46 3.63 3.18 3.59 3.50 4.16 3.62 3.34 2.76 3.24 2.96 

MnO 0.35 0.36 0.33 0.34 0.32 0.29 0.31 0.26 0.22 0.16 0.15 0.09 

Total 96.4 96.5 96.9 96.5 96.9 97.6 97.8 96.4 96.2 96.6 96.1 95.9 

at.Fe/Fe+Mg 0.56 0.56 0.57 0.56 0.57 0.57 0.51 0.52 0.51 0.49 0.50 0.46 

Figures 1-4; Tables 1-8 23 
Table 5. Average chemical analyses, in weight percent, of biotite in mafic inclusions, dikes, aggregates, 

and their host granitoids-Continued 

Granodiorite 

Unit Dinkey Creek Granodiorite-Continued of Red lake 

Locality Deer Creek (DR)-Continued Wishon Reservoir (WR) Chinese Peak (CP) 

Sample No. 5 6 2 3 

Description H H A H H I (c) 

n 5 3 4 5 5 4 6 4 4 7 5 5 

Si02 36.9 37.0 37.3 36.5 36.9 36.2 37.0 36.9 37.0 37.2 37.0 37.1 

Alp3 16.2 16.4 16.0 16.1 16.0 15.8 15.9 15.7 15.8 15.8 14.9 14.6 

FeO* 19.1 18.3 19.2 18.8 18.4 20.3 21.3 21.1 21.6 21.2 20.7 20.4 

MgO 11.44 12.04 11.38 11.97 12.10 11.06 10.50 10.69 10.23 10.45 10.47 10.50 

CaO 0.02 0.05 0.02 0.03 0.02 0.03 0.02 0.03 0.03 0.01 0.01 0.01 

Na20 0.17 0.12 0.12 0.16 0.17 0.09 0.08 0.08 0.08 0.08 0.10 0.10 

Kp 9.42 9.64 9.59 9.54 9.54 9.46 9.32 9.23 9.22 9.30 9.17 9.23 

Ti02 2.88 2.26 3.00 2.49 3.10 2.96 2.48 2.28 2.70 2.56 3.77 3.88 

MnO 0.14 0.11 0.13 0.13 0.10 0.37 0.30 0.29 0.28 0.29 0.48 0.42 

Total 96.3 95.9 96.7 95.7 96.3 96.3 96.9 96.3 96.9 96.9 96.6 96.2 

at.Fe/Fe+Mg 0.48 0.46 0.49 0.47 0.46 0.51 0.53 0.53 0.54 0.53 0.53 0.52 

Granodiorite of 

Red Lake- Mount Givens Granodiorite 

Unit Continued 

Chinese Peak 

(CP)- Mono Hot Springs (MHa) Camp 61 (MHb) 

Locality Continued 

Sample No. 2 2 6 7 8 9 

Description l(m) H H H H l(c) l(m) 

n 6 5 4 4 6 7 6 5 4 3 5 6 

Si02 37.3 36.4 37.3 36.8 36.8 38.3 35.8 36.2 36.2 35.9 36.3 36.1 

Al20 3 14.8 14.7 15.8 16.0 15.7 15.6 15.1 15.5 15.5 15.5 15.4 15.4 

FeO* 20.0 20.7 19.9 21.1 21.4 18.6 18.6 18.7 17.9 18.7 18.7 18.7 

MgO 10.79 10.60 11.2 10.4 10.4 12.4 11.6 11.7 12.6 11.6 11.7 11.7 

CaO 0.03 0.03 0.02 0.02 0.02 0.03 0.01 0.01 0.05 0.02 0.03 0.04 

Na20 0.11 0.10 0.08 0.08 0.09 0.09 0.08 0.09 0.07 0.08 0.08 0.08 

K20 9.25 9.66 9.26 9.25 9.17 9.49 9.47 9.47 9.66 9.45 9.55 9.45 

Ti02 3.62 3.68 2.72 2.42 2.51 2.37 3.23 2.43 1.93 2.87 3.06 2.80 

MnO 0.43 0.40 0.44 0.29 0.30 0.47 0.39 0.46 0.35 0.41 0.35 0.39 

Total 96.3 96.3 96.7 96.4 96.4 97.4 94.3 94.6 94.3 94.5 95.2 94.7 

at.Fe/Fe+Mg 0.51 0.52 0.50 0.54 0.54 0.46 0.47 0.47 0.45 0.48 0.47 0.47 

Unit Mount Givens Granodiorite-Continued 

Locality Camp 61 (MH b)-Continued 

Sample No. 10 11 12 

Description H l(c) l(m) H H 

n 4 6 4 6 5 4 7 

Si02 36.2 36.3 36.3 36.7 36.8 36.8 36.8 

Alp3 15.3 15.6 15.7 15.5 15.4 15.4 15.3 

FeO* 18.7 18.7 18.3 18.8 18.8 18.7 18.8 

MgO 11.8 11.8 11.9· 11.7 11.5 11.7 11.8 

CaO 0.02 0.04 0.06 0.02 0.02 0.01 0.03 

N~O 0.07 0.07 0.07 0.08 0.08 0.09 0.08 

K20 9.51 9.48 9.37 9.58 9.59 9.66 9.54 

Ti02 2.85 2.72 2.35 2.62 3.11 2.61 2.67 

MnO 0.37 0.38 0.41 0.42 0.39 0.43 0.39 

Total 94.8 95.1 94.5 95.4 95.7 95.4 95.4 

at.Fe/Fe+Mg 0.47 0.47 0.46 0.47 0.48 0.47 0.47 

24 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Table 6. Average chemical analyses, in wei~ht percent, of hornblende in mafic inclusions, dikes, aggregates, and 

their host granitoids and associated gabbr01d 

[Chemical analyses by B. Barbarin using an electron microprobe; n, number of analyzed spots included in average; at., atomic; FeO*, 

total iron as FeO; m, margin; c, core] 

Unit Bass Lake Tonalite Dinkey Creek Granodiorite 

Locality North Fork (NF) Meadow Lakes (ML) Shaver Lake quarry (SQ) 

Sample No. 2 3 4a 5 2 4a 

Description H D G H H A H 

n 4 6 6 5 5 5 3 5 5 4 6 4 

Si02 44.2 43.5 46.3 46.5 46.7 45.4 45.6 45.6 44.6 44.5 44.3 44.3 

~03 8.77 8.81 8.35 8.85 8.48 8.69 8.75 8.61 8.33 8.31 8.39 8.25 

FeO* 18.1 18.2 18.6 16.1 16.6 18.5 18.9 18.5 19.7 19.8 20.3 19.2 

MgO 10.07 9.87 10.08 11.31 11.50 9.99 9.68 10.01 9.70 9.67 9.34 9.82 

CaO 12.5 12.7 12.4 12.3 12.1 12.2 12.4 12.4 11.9 11.8 12.0 12.9 

N~O 1.07 1.01 1.00 1.09 0.99 1.09 0.97 1.01 1.13 1.30 1.18 1.04 

~0 0.75 0.84 0.82 0.44 0.83 0.88 0.93 0.89 0.92 0.91 0.94 0.86 

~6 1.23 0.96 0.91 1.27 1.11 1.43 1.24 1.45 1.39 1.54 1.33 1.28 

0.51 0.51 0.50 0.29 0.49 0.46 0.44 0.43 0.53 0.52 0.54 0.50 

Total 97.2 96.4 99.0 98.2 98.8 98.6 98.9 98.9 98.2 98.4 98.3 98.2 

at.Fe/Fe+Mg 0.50 0.51 0.51 0.45 0.45 0.51 0.52 0.51 0.53 0.54 0.55 0.52 

Unit Dinkey Creek Granodiorite-Continued 

Locality Shaver Lake quarry (SQ)-Conti nued 

Sample No. 4-Conti nued 5 6 9 10 

Description A I (dark) I (light) H H H H 

n 7 3 6 4 4 7 4 6 3 7 4 7 

Si02 44.8 45.1 44.1 44.7 45.3 44.6 45.0 44.8 44.5 45.1 44.2 44.4 

~03 8.31 8.52 8.13 8.16 8.08 8.66 8.21 8.32 8.48 8.49 8.67 8.91 

FeO* 18.9 19.2 18.4 18.1 19.0 19.6 19.0 19.4 19.1 19.3 19.5 19.7 

MgO 10.00 9.89 10.23 10.40 9.91 9.33 9.73 9.49 9.81 9.71 9.22 9.30 

CaO 12.6 12.6 13.2 13.0 11.9 12.0 12.1 12.2 11.8 12.4 12.1 12.4 

N~O 1.12 1.02 0.97 0.98 1.10 1.11 1.09 1.02 1.17 1.01 1.07 0.99 

~0 0.88 0.90 0.83 0.85 0.88 0.99 0.89 0.91 0.92 0.89 0.95 0.92 

Ti02 1.44 1.19 1.19 1.21 1.30 1.31 1.38 1.24 1.43 1.20 1.32 1.19 

MnO 0.50 0.49 0.49 0.47 0.53 0.53 0.50 0.49 0.48 0.54 0.53 0.51 

Total 98.6 98.9 97.5 97.9 98.0 98.1 97.9 97.9 97.7 98.6 97.6 98.30 

at.Fe/Fe+Mg 0.51 0.52 0.50 0.49 0.52 0.54 0.52 0.54 0.52 0.53 0.54 0.54 

Unit Dinkey Creek Granodiorite-Continued 

Locality Shaver lake quarry (SQ)-Continued Markwood Creek (MK) Deer Creek (DR) 

Sample No. 12 13 2 2 3 4 

Description H H H H H A H 

n 5 6 3 7 5 5 7 7 9 6 5 7 

Si02 44.2 44.3 44.7 44.5 45.1 44.6 44.2 45.4 46.0 47.1 45.9 45.5 

~03 8.68 8.70 8.35 8.68 8.51 8.87 9.32 8.52 8.14 8.27 8.70 9.47 

FeO 19.7 19.6 19.6 19.6 19.8 20.1 20.0 17.8 15.6 15.0 16.2 16.1 

MgO 9.34 9.35 9.53 9.43 9.72 9.52 9.37 10.89 10.95 13.01 12.12 11.81 

CaO 11.8 11.9 11.7 11.8 12.0 12.0 12.1 11.9 12.4 11.9 11.7 11.8 

N~O 1.13 1.06 1.15 1.06 1.06 1.12 1.10 1.09 1.03 0.99 1.06 1.05 

~0 0.97 0.95 0.95 0.96 0.92 1.00 1.05 0.83 0.82 0.63 0.63 0.59 

Ti02 1.36 1.20 1.32 1.27 1.39 1.37 1.38 1.48 1.49 1.65 1.64 1.69 

MnO 0.53 0.53 0.52 0.52 0.49 0.49 0.48 0.46 0.43 0.31 0.32 0.28 

Total 97.7 97.6 97.8 97.8 99.0 99.1 99.0 98.4 96.9 98.9 98.3 98.3 

at.Fe/Fe+Mg 0.54 0.54 0.54 0.54 0.53 0.54 0.55 0.48 0.47 0.39 0.43 0.43 

Figures 1-4; Tables 1-8 25 
Table 6. Average chemical analyses, in weight percent, of hornblende in mafic inclusions, dikes, aggregates, and 

their host granitoids and associated gabbroid-Continued 

Granodiorite 

Unit Dinkey Creek Granodiorite-Continued of Red lake 

Locality Deer Creek (DR)-Conti nued Wishon Reservoir (WR) Chinese Peak (CP) 

Sample No. 5 6 2 3 

Description H H A H H l(c) 

n 5 3 4 5 5 4 6 4 4 7 4 5 

Si02 46.6 46.2 46.8 45.4 46.3 46.0 46.4 46.0 46.3 46.5 46.4 46.3 

Al203 8.94 9.25 8.75 9.09 8.64 7.87 8.32 8.75 8.57 8.44 8.26 8.07 

FeO 16.1 16.1 16.1 16.2 16.1 17.7 18.4 18.9 18.4 18.5 16.8 17.3 

MgO 12.13 11.94 12.15 12.02 12.30 11.21 10.54 10.11 10.42 10.38 11.54 11.07 

CaO 12.5 11.5 11.4 11.2 11.2 12.3 12.4 12.5 12.3 12.5 12.1 12.2 

N~O 0.98 0.96 0.95 1.05 0.93 0.99 0.97 0.92 1.01 0.96 1.36 1.27 

~0 0.63 0.60 0.54 0.75 0.56 0.75 0.83 0.85 0.81 0.80 0.81 0.80 

Ti02 1.56 1.64 1.38 1.80 1.41 1.20 1.42 1.08 1.28 1.19 1.30 1.29 

MnO 0.32 0.29 0.37 0.30 0.33 0.55 0.47 0.46 0.46 0.47 0.58 0.65 

Total 99.8 98.5 98.4 97.8 97.8 98.6 99.8 99.6 99.6 99.7 99.2 99.0 

at.Fe/Fe+Mg 0.43 0.43 0.43 0.43 0.42 0.47 0.50 0.51 0.50 0.50 0.45 0.47 

Granodiorite of 

Red Lake- Mount Givens Granodiorite 

Unit Continued 

Chinese Peak (CP)-

Locality Continued Mono Hot Springs (MHa) Camp 61 (MHb) 

Sample No. 1 2 1 2 1 6 7 8 9 -- -- -- Description l(m) H H H l(c) l(m) 

n 5 5 4 4 6 5 6 5 5 3 6 9 

Si02 41:6 46.5 46.8 45.8 45.7 48.4 45.3 45.9 47.5 45.4 45.1 45.2 

Al203 7.31 7.25 8.11 8.80 8.64 7.42 7.28 7.19 6.07 7.84 7.81 7.98 

FeO* 16.5 16.5 17.1 18.9 18.8 16.1 15.8 15.9 14.8 16.0 16.2 16.4 

MgO 11.96 11.93 11.5 10.0 10.0 12.4 12.1 12.1 13.5 12.0 11.9 11.6 

CaO 12.1 11.7 12.3 12.4 12.4 12.6 13.3 13.1 12.7 13.0 13.2 13.2 

N~O 1.20 1.29 1.04 1.01 0.97 1.05 0.96 0.99 0.78 1.10 1.06 1.01 

~0 0.67 0.70 0.78 0.85 0.82 0.71 0.67 0.69 0.51 0.81 0.79 0.78 

Ti02 1.23 1.26 1.28 1.22 1.27 1.10 1.14 1.22 0.65 1.32 1.23 1.18 

MnO 0.61 0.58 0.59 0.47 0.47 0.64 0.60 0.63 0.54 0.58 0.56 0.58 

Total 99.2 97.7 99.5 99.5 99.1 100.4 97.2 97.7 97.1 98.1 97.9 97.9 

at.Fe/Fe+Mg 0.44 0.44 0.46 0.52 0.51 0.42 0.42 0.43 0.38 0.43 0.43 0.44 

Unit Mount Givens Granodiorite-Continued 

Locality Camp 61 (MHb)-Continued 

Sample No. 10 11 12 

Description H l(c) l(m) H H 

n 4 4 6 5 6 5 7 

SiOO 45.1 45.5 45.9 47.0 46.7 46.6 46.5 

A~ 3 7.90 7.64 7.52 7.26 7.95 7.49 7.42 

FeO* 15.7 16.5 16.1 15.8 15.8 15.9 16.2 

MgO 12.2 11.6 12.0 12.4 12.2 12.3 12.1 

CaO 13.0 13.3 13.1 12.2 12.2 12.1 12.1 

~bo 1.15 0.97 0.95 0.94 0.94 1.04 0.98 

0.79 0.71 0.68 0.69 0.71 0.74 0.74 

Ti02 1.29 1.02 1.12 1.00 1.14 1.07 1.03 

MnO 0.53 0.56 0.56 0.60 0.61 0.57 0.57 

Total 97.7 97.8 97.9 97.9 98.3 97.8 97.6 

at.Fe/Fe+Mg 0.42 0.44 0.43 0.42 0.42 0.42 0.43 

26 Mafic Inclusions, Aggregates, and Dikes in Granitoid Rocks, California 
Table 7. Rb-Sr isotopic data on mafic inclusions, dikes, aggregates, and their host granitoids 

[Rb and Sr concentrations by energy dispersive X-ray fluorescence. Analyses by A.C. Robinson and M. Wilcox. c, coarse; f, fine] 

Sample Rb(ppm) Sr(ppm) 87Rb/86Sr 87Sr/ 86Sr Sample Rb(ppm) Sr(ppm) 87Rb/86Sr 87Sr/86Sr 

Bass Lake Tonalite Dinkey Creek Granodiorite--Continued 

HH1-H 103 360 0.83 0.70723±6 DR2-A 76.6 382 0.58 0.70797±3 

HH2-A 65.3 488 0.39 0.70650±6 DR3-I 50.6 471 0.31 0.70744±4 

HH3-A 68.8 455 0.44 0.70677±6 DR4a-I 15.4 578 0.08 0.70745±4 

HH4-I 86.1 486 0.51 0.70676±5 DRS-I 13.1 575 0.07 0.70739±3 

HHSa-D 74.1 665 0.32 0.70653±3 WR1-H 96.1 402 0.69 0.70834±3 

HHSb-D 63.8 654 0.28 0.70640±3 WR2-A 124 257 1.40 0.70920±4 

HHSc-D 61.3 619 0.29 0.70608±4 WR3-I 124 380 0.94 0.70852±3 

HHSd-D 54.9 595 0.27 0.70643±3 

HH6a-D 58.1 580 0.29 0.70566±4 Mount Givens Granodiorite 

HH6b-D 61.8 569 0.31 0.70565±5 

HH6c-D 54.4 637 0.25 0.70652±5 MHb1-H 130 414 0.91 0.70765±4 

HH6d-D 68.8 525 0.38 0.70612±3 MHb2-H 129 425 0.88 0.70762±3 

HH6e-AP 90.1 385 0.68 0.70684±6 MHb3-H 126 434 0.84 0.70757±8 

NF1-H 66.5 276 0.70 0.70562±4 MHb4-A 207 262 2.29 0.70942±6 

NF2-I 61.7 245 0.73 0.70573±4 MHb5-A 142 387 1.06 0.70781±3 

NF3-I 87.8 253 1.00 0.70616±4 MHb6-l 141 356 1.15 0.70783±5 

NF4a-D 34.3 769 0.13 0.70633±3 MHb7-I 77.0 403 0.55 0.70717±4 

NF4b-D 40.6 620 0.19 0.70565±4 MHb8-I 291 360 2.34 0.70925±3 

NFS-G 43.9 450 0.28 0.70541±4 MHb9a-Irn 167 362 1.33 0.70814±5 

MHb9b-lc 103 364 0.82 0.70731±5 

Dinkey Creek Granodiorite MHb10-I 172 375 1.33 0.70816±5 

MHb13-I 210 329 2.43 0.70875±8 

SQ1-H 132 310 1.23 0.70930±4 MHb14-l 193 410 1.36 0.70819±6 

SQ2-H 125 330 1.10 0.70914±5 MHb15-I 98.1 403 0.70 0.70737±3 

SQ3-I 103 336 0.89 0.70886±5 CR1-H 184 484 1.10 0.70807±5 

SQ3a-A 161 207 2.25 0.71089±5 CR2a-A 120 533 0.65 0.70734±3 

SQ3b-Ac 196 180 3.15 0.71215±5 CR2b-l 104 553 0.54 0.70721±3 

SQ3b-Af 156 276 1.64 0.70980±6 CR3a-A 163 390 1.21 0.70805±5 

SQ4-I 101 328 0.89 0.70881±5 CR3b-l 84.8 352 0.70 0.70733±3 

SQS-1 142 292 1.41 0.70945±4 CR4-A 141 395 1.03 0.70780±4 

SQ6-I 110 321 0.99 0.70893±5 CR5-A 286 330 2.51 0.70966±4 

SQ7-I 96.3 344 0.81 0.70874±4 CR6-I 115 522 0.64 0.70732±4 

SQ8-I 161 321 1.45 0.70966±4 CR7-I 115 516 0.64 0.70735±5 

SQ9-I 110 281 1.13 0.70916±5 CR8-I 101 510 0.57 0.70727±5 

SQll-1 169 330 1.48 0.70969±3 CR9-I 175 512 0.99 0.70774±6 

DR1a-H 62.6 471 0.38 0.70787±5 CR10-I 0.2 275 0.003 9.70987±1 

Figures 1-4; Tables 1-8 27 
Table 8. Sm-Nd isotopic data on mafic inclusions, aggregates, and associated rocks 

[Sm and Nd concentrations from table 3. Data for SLb96X3, host 

granitoid, from Domenick and others (1983)] 

Sample Sm (ppm) Nd (ppm) 147srrf«Nd 143Ndf44Nd 

No. 

Bass Lake Tonalite 

HH1-H 1.3 13.9 0.057 0.51231±3 

HH4-I 5.9 34.6 0.103 0.51237±2 

HH6a-D 1.8 25.3 0.043 0.51246±2 

Dinkey Creek Granodiorite 

Slb96X3 5.6 32.2 0.105 0.51218±1 

SQ2-H 3.9 21.9 0.107 0.51220±2 

SQ5-I 8.1 39.0 0.126 0.51225±2 

SQ9-I 5.6 25.0 0.135 0.51233±2 

DR2-A 6.7 26.9 0.151 0.51229±3 

Mount Givens Granodiorite 

MHb3-H 3.8 34.1 0.067 0.51237±2 

MHb4-A 10.1 56.6 0.108 0.51246±2 

MHb13-I 6.1 28.4 0.130 0.51248±2 

28 Mafic Inclusions, Aggregates, and Dikes In Granitoid Rocks, California 
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