Huntington Lake Quadrangle, 

Central Sierra Nevada, 

California Analytic Data

GEOLOGICAL SURVEY PROFESSIONAL PAPER 724-A
Huntington Lake Quadrangle, 

Central Sierra Nevada, 

California Analytic Data

By PAUL C. BATEMAN and DAVID R. WONES

SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

GEOLOGICAL SURVEY PROFESSIONAL PAPER 724-A

Chemical, spectrographic, and modal analyses 

and potassium-argon age determinations 

on granitic rocks supplement Geologic 

Quadrangle Map (GQ-987)

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1972
UNITED STATES DEPARTMENT OF THE INTERIOR 

ROGERS C. B. MORTON, Secretary

GEOLOGICAL SURVEY 

V. E. McKelvey, Director

Library of Congress catalog-card No. 72-600073

For sale by the Superintendent of Documents, U.S. Government Printing Office

Washington, D.C. 20402 - Price 55 cents

Stock Number 2401-00226
CONTENTS

Page

Abstract.............................................................................................................................. .... Al

Introduction.............................................................................................................................. 1

General geology....................................................................................................... .............. 1

Analytic data....................................................................................................... .................. 2

References................................................................................................... ........................... 2

ILLUSTRATIONS

Page

FIGURES 1-7. Simplified geologic map of Huntington Lake 

quadrangle showing 

1. Location of chemically analyzed samples and samples 

on which potassium-argon age determinations 

have been made................................................ ... ...... A4

2. Quartz................................................................................... . . . 6

3. Potassium feldspar......................................................................... 7

4. Plagioclase. ........... ................................................................... 8

5. Mafic minerals .. ......................... ......... . .. .... 9

6. Specific gravity.............-.-...-..........................................--.-----.---.. . 10

7. Steeply dipping regional joints.....-............---..---------...---..------.-... 11

8. Plot of modes for Upper Cretaceous granitic rocks.... . ........ 12

9. Plot of modes for Lower Cretaceous granitic rocks................................ 13

10. Plot of norms for granitic rocks.------................................................. ...... 14

TABLES

Page

TABLE 1. Chemical and spectrographic analyses, norms, and modes of

representative granitic rocks........--.....--................-..-..... ......................... A15

2. Potassium-argon age determinations on biotite and hornblende

from granitic rocks of the Huntington Lake quadrangle. .............. 18

ill
SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

HUNTINGTON LAKE QUADRANGLE, 

CENTRAL SIERRA NEVADA, CALIFORNIA ANALYTIC DATA

By PAUL C. BATEMAN and DAVID R. WONES

ABSTRACT

Samples of granitic rocks collected during the geologic 

mapping of the Huntington Lake quadrangle (Bateman and 

Wones, 1972) were chemically, spectrographically, and modally analyzed. The volume percentages of quartz, potassium 

feldspar, plagioclase, and mafic minerals and the bulk specific 

gravities of 314 samples are plotted separately and partly 

contoured on a simplified geologic base map to show zonal 

patterns within plutons. Chemical and spectrographic analyses 

of 31 samples and ternary plots of norms and modes indicate 

that the plutonic rocks range in composition from diorite or 

gabbro to felsic quartz monzonite. Potassium-argon determinations on biotite and hornblende yield ages that range from 

82 to 90.3 million years. Many of these ages have been reduced 

as a result of reheating by younger intrusives. A map of conspicuous steeply dipping regional joints is included.

INTRODUCTION

The Huntington Lake quadrangle is about 40 

miles northeast of Fresno, Calif., at middle altitudes 

of the long west slope of the Sierra Nevada, about 

midway between Yosemite and Kings Canyon National Parks. A geologic map of the quadrangle was 

recently published in the U.S. Geological Survey's 

map series as "Geologic Map of the Huntington Lake 

15-minute Quadrangle, Central Sierra Nevada, California" (Bateman and Wones, 1972). This report 

supplements the quadrangle map in presenting 

analytic data chemical, spectrographic, and modal 

analyses and potassium-argon age determinations 

on samples of granitic rock collected during the 

mapping. It is part of a continuing series of investigations of the bedrock geology of the central 

Sierra Nevada batholith. Only aspects of the geology 

that bear on the interpretation of the analytic data 

are discussed here. A nontechnical summary accompanies the map; the geology of the central Sierra 

Nevada has been summarized in earlier reports 

(Bateman and others, 1963; Bateman and Wahrhaftig, 1966; Bateman and Eaton, 1967).

GENERAL GEOLOGY

The quadrangle is underlain chiefly by granitic 

rocks, but deformed and metamorphosed sedimentary

rocks are present in the Dinkey Creek roof pendant 

in the central part of the quadrangle and in smaller 

bodies in the western and southern part (fig. 1). 

The most common metamorphic rocks are quartzite, 

marble, calc-silicate hornfels, quartz-biotite schist, 

and biotite-andalusite hornfels (Kistler and Bateman, 1966). These rocks are in the hornblende 

hornfels facies of contact metamorphism. The ages 

of the metasedimentary rocks are not known, but on 

the basis of lithologic characteristics and regional 

setting undoubtedly are Paleozoic or early Mesozoic.

The granitic rocks are in discrete plutons that are 

in sharp intrusive contact with one another. Where 

observed, contacts between plutons are steeply 

dipping or vertical. In composition, the plutons 

range from diorite and gabbro to felsic quartz 

monzonite. Most granitic rocks are medium grained 

(average grain size 2-5 millimeters), but rocks of 

some smaller bodies are locally fine grained. Porphyritic rocks are present locally and contain phenocrysts of potassium feldspar as large as 25 

millimeters in greatest dimension. Some plutons 

are remarkably uniform in composition and texture; 

others are zoned. Many zoned plutons are progressively more felsic inward. A common zonal pattern 

has strongly foliated equigranular hornblende-biotite 

granodiorite containing abundant disk-shaped or 

weakly triaxial mafic inclusions in an outer zone 

that grades to an inner zone of slightly foliated or 

unfoliated porphyritic biotite-quartz monzonite containing no mafic inclusions.

Field observations of contact relations of plutons 

and petrologic and chemical criteria indicate that 

the granitic rocks in the Huntington Lake quadrangle belong to two intrusive sequences of somewhat different ages (Bateman and Dodge, 1970). 

Potassium-argon dating of the granitic rocks of the 

Sierra Nevada indicates that the older sequence is 

Early Cretaceous (121-104 million years) and that 

the younger sequence is Late Cretaceous (90-79

Al
A2 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

million years) (Evernden and Kistler, 1970). Over 

a broad region that includes the Huntington Lake 

quadrangle, granitic rocks of the Upper Cretaceous 

sequence lie generally northeast of the Lower 

Cretaceous sequence. Within the Huntington Lake 

quadrangle, Upper Cretaceous granitic rocks occupy 

the northeast corner, and isolated plutons believed 

to be Late Cretaceous have intruded Lower 

Cretaceous rocks farther west in the quadrangle.

ANALYTIC DATA

We attempted to collect not less than one sample 

per square mile from granitic terranes; but because 

the principal objective was geologic mapping rather 

than systematic sampling and because exposures are 

discontinuous, a regularly spaced pattern of sampling was not possible. In all, about 400 samples 

were collected. Of these, 314 samples of granitic 

rocks were analyzed modally, and 31 of these 

samples were analyzed chemically and spectrographically. The radiometric ages of biotite and (or) 

hornblende from 11 samples were determined by the 

potassium-argon method. Fission-track ages of 

biotite from two samples of granitic rock from the 

quadrangle have been published by Naeser and 

Dodge (1969), and many of our samples were used 

by Wollenberg and Smith (1968) in a study of 

radioactivity and heat production in the Sierra 

Nevada batholith. The data from these reports are 

not repeated here.

Modes were determined by counting 1,000-2,000 

regularly spaced points on rock slabs no smaller than 

6 square inches in which plagioclase and potassium 

feldspar were selectively stained. Four minerals or 

mineral groups were counted quartz, potassium 

feldspar, plagioclase, and mafic minerals. Unfortunately, biotite and hornblende cannot be readily 

distinguished on stained slabs. In the central Sierra 

Nevada, however, granodiorite and quartz monzonite 

generally contain more biotite than hornblende, and 

rocks that contain 5 percent or less total mafic 

minerals rarely contain any hornblende.

The percentages of the modal constituents are 

plotted on simplified geologic maps (figs. 2-5). Also 

on the maps are such contours as seem justified. The 

contours were drawn by visual inspection, and 

alternate positions are possible in many areas. No 

attempt was made to contour all areas, and it is 

evident that additional data points would be required 

to do so. The modes, normalized to 100 percent, are 

plotted on ternaries whose corners are quartz, 

potassium feldspar, and plagioclase. Figure 8 shows 

plots of plutons of Late Cretaceous age, and figure 

9, plots of plutons of Early Cretaceous age.

The bulk specific gravities are plotted on the same 

simplified base map as the modes and are partly

contoured in a similar way (fig. 6). Vertical or 

steeply dipping joints also are plotted on the base 

map (fig. 7). The joints shown are prominent and 

readily visible on aerial photographs; they were 

transferred by visual inspection.

Chemical and semiquantitative data for chemically 

analyzed samples whose locations are shown in 

figure 1 are given in table 1, together with CIPW 

norms, modes, and bulk specific gravities. The 

norms, recalculated to 100 percent, are plotted on a 

ternary diagram (fig. 10) whose corners are normative quartz, orthoclase, and plagioclase (ab-j-an).

Potassium-argon age determinations for age-dated 

samples shown in figure 1 are given in table 2. Many 

of the ages shown in this table are consistent with 

the age assignments of the granitic rocks in the 

quadrangle, but some of them have been reduced 

as a result of reheating at the time of intrusion of 

younger plutons. The age assignments of the granitic 

rocks are based on data from a much larger number 

of samples, most of them collected outside the 

quadrangle (Evernden and Kistler, 1969).

REFERENCES

Bateman, P. C., Clark, L. D., Huber, N. K., Moore, J. G., and 

Rinehart, C. D., 1963, The Sierra Nevada batholith a 

synthesis of recent work across the central part: U.S. 

Geol. Survey Prof. Paper 414-D, 46 p.

Bateman, P. C., and Dodge, F. C. W., 1970, Variations of major chemical constituents across the central Sierra Nevada 

batholith: Geol. Soc. America Bull., v. 81, p. 409-420.

Bateman, P. C., and Eaton, J. P., 1967, Sierra Nevada Batholith: Science, v. 158, no. 3807, p. 1407-1417.

Bateman, P. C., and Wahrhaftig, Clyde, 1966, Geology of the 

Sierra Nevada, in Bailey, E. H., ed., Geology of northern 

California: California Div. Mines and Geology Bull. 190, 

p. 107-172.

Bateman, P. C., and Wones, D. R., 1972, Geologic map of the 

Huntington Lake 15-minute quadrangle, central Sierra 

Nevada, California: U.S. Geol. Survey Geol. Quad. Map 

GQ-987.

Evernden, J. F., and Kistler, R. W., 1970, Chronology of emplacement of Mesozoic batholithic complexes in California 

and western Nevada: U.S. Geol. Survey Prof. Paper 623, 

42 p.

Kistler, R. W., and Bateman, P. C., 1966, Stratigraphy and 

structure of the Dinkey Creek Roof Pendant in the Central Sierra Nevada, California: U.S. Geol. Survey Prof. 

Paper 524-B, 14 p.

Kistler, R. W., Bateman, P. C., and Brannock, W. W., 1965, 

Isotopic ages of minerals from granitic rocks of the central Sierra Nevada and Inyo Mountains, California: 

Geol. Soc. America Bull., v. 76, no. 2, p. 155-164.

Naeser, C. W., and Dodge, F. C. W., 1969, Fission-track ages 

of accessory minerals from granitic rocks of the Central 

Sierra Nevada Batholith, California: Geol. Soc. America 

Bull., v. 80, p. 2201-2212.

Wollenberg, H. A., and Smith, A. R., 1968, Radiogeologic 

studies in the central part of the Sierra Nevada batholith, California: Jour. Geophys. Research, v. 73, no. 4, 

p. 1481-1495.
FIGURES 1-10 AND TABLES 1 AND 2
A4 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

119°00'

FIGURE 1. Location of chemically analyzed samples (black dots) and
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA A5

f

I

i-Ss £

g fc § g

 § s J

1 >

11

.s s

155

Intrude Mount Givens

Granodiorite

Krl

Granodiorite of

Red Lake

\^ Kep l>

Granodiorite of

Eagle Peak

Porphyritic fades shown by

hachured pattern

-

EXPLANATION

Older than Mount Givens 

Granodiorite

Quartz monzonite of 

Shorthair Creek

Mount Givens Granodiorite

Granodiorite of McKinley Grove

Granodiorite of Dinkey Creek

Quartz diorite of Blue Canyon

Quartz diorite, diorite,

hornblende gabbro,

and other mafic pluIntrude only rocks 

thought to be older 

than Mount Givens 

Granodiorite

Small bodies of 

medium- to finegrained equigranular quartz monzonite

Minimum age not 

established

Mixed and hybrid rock

Metamorphic rocks 

samples on which potassium-argon age determinations were made (plus signs).

476-248 O - 72 - 2
A6 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

FIGURE 2. Simplified geologic map of Huntington Lake quadrangle showing quartz, in volume percent. Explanation in

figure 1.
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA

FIGURE 3. Simplified geologic map of Huntington Lake quadrangle showing potassium feldspar, in volume percent.

Explanation in figure 1.
A8 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

37

FIGURE 4. Simplified geologic map of Huntington Lake quadrangle showing plagioclase, in volume percent. Explanation

in figure 1.
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA A9

FIGURE 5. Simplified geologic map of Huntingdon Lake quadrangle showing mafic minerals, in volume percent. Explanation

in figure 1.
A10 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

FIGURE 6. Simplified geologic map of Huntington Lake quadrangle showing specific gravity. Explanation in figure 1.
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA All

FIGURE 7. Simplified geologic map of Huntington Lake quadrangle showing steeply dipping regional joints. Explanation

in figure 1.
A12 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

CLASSIFICATION PLAN

Plagioclase

EXPLANATION

Mount Givens Granod

Medium- to tint 

equigranula 

monzonite

EXPLANATION

Quartz monzonit

EXPLANATION

Granodiorite of Eagle 

Peak

Equigranular facies

O 

Porphyritic facies

EXPLANATION

 

Granodiorite of Red Lake

+

Quartz monzonite of Bald 

Mountain

x

Dikes of quartz monzonite of Bald Mountain in other rocks

FIGURE 8. Plot of modes for Upper Cretaceous granitic rocks.
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA A13

EXPLANATION

 

Granodiorite of

EXPLANATION

Quartz monzoi 

McKinley Gn

Quartz monzonite 

Snow Corral M

Quartz monzon 

lower Bear Cn

10 65

EXPLANATION 

Quartz diorite of Blue Canyon

Quartz monzonite of 

Dinkey Dome

A 

North mass

+ 

Middle (Three Sisters) mass

 

South (Dinkey Dome) mass

Aplit e dikes c utt 

quartz monzonite 

Dinkey Dome

EXPLANATION

35 65 "" 10 35

FIGURE 9. Plot of modes for Lower Cretaceous granitic rocks.

65
A14 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

Plagioclase (ab+an) Orthoclase

EXPLANATION

v 

Granodiorite of Red Lake

 

Granodiorite of Eagle Peak

 

Granodiorite of Big Creek

A

Quartz monzonite of Bald Mountain

Medium-to fine-grained equigranular 

quartz monzonite

® 

Mount Givens Granodiorite

+ 

Granodiorite of Dinkey Dome

o 

Quartz monzonite of Shorthair Creek

Quartz monzonite of lower Bear Creek

x 

Quartz monzonite of Snow Corral Meadow

o 

Granodiorite of McKinley Grove

A 

Granodiorite of Dinkey Creek

o 

Quartz diorite of Blue Canyon

FIGURE 10. Plot of norms for granitic rocks.
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA A15

TABLE 1. Chemical and spectrographic analyses, norms, and modes of representative granitic rocks

[Chemical analyses: Standard rock analysis of HL-29(1), by D. F. Powers. 

Rapid rock analyses for HL-4(1), by P. L. D. Elmore, Lowell Artis, Gillison Chloe, James Kelsey, S. D. Botts, J. L. Glenn, and Hezekiah Smith ; 

for HL-4(2) and HL-9, by P. L. D. Elmore, S. D. Botts, Lowell Artis, 

J. L. Glenn, Gillison Chloe, Hezekiah Smith, and Dennis Taylor; for HL29(2), by P. L. D. Elmore, S. D. Botts, and Lowell Artis; for all others, 

by Hezekiah Smith, J. L. Glenn, James Kelsey, Gillison Chloe, and P. L. D. 

Elmore. Semiquantitative spectrographic analysis of HL-29(1), by P. R. 

Barnett; for HL-29(2), by W. B. Crandell; for all others, by Chris Heropoulos : L == detected, but below limit of value given ; N = not detected ;

looked for but not found, As, Au, Bi, Cd, Ge, Hf, In, Mo, Pd, Pt, Re, Sb, 

Ta, Te, Th, Tl, U, W, and Zn ; looked for in samples that contain La or 

Ce but not found, Pr, Nd, Sm, Eu ; values reported to the nearest number 

in the series 1, 0.7, 0.5, 0.3, 0.2, 0.15, 0.1, etc., which represent midpoints 

of group data on a geometric scale, and the precision of a value is approximately plus or minus one bracket at 68 percent confidence or two brackets 

at 95 percent. Modal analyses by M. B. Norman, M. G. Hoerster, and 

O. G. Polovstoflf: 1,000-2,000 point counts on a slab of at least 6 square 

inches]

Quartz diorite 

of 

Blue Canyon

HLc-58

Granodiorite of Dinkey Creek

HL-9 H La-3 3 HLa-40 HLa-91 HLc-11 HLc-140 HLd-18

Granodiorite of 

McKinley Grove

HLc-18 HLd-71

Chemical analyses (weight percent)

SJQ,

AfcOa-..-

FeO ... .................... . MgO .................................

CaO .......

Na=O. .... .

K.-0 ..................................

H-'O

TiO- .. ... .. .

Pl'Oo ... ... .....

MnO ..

CO-. ... .. ........... ....

Cl. ......

F

Less O ... .....

Powder density 

(gm/cc).. ... .. .

...... 63.1

...... 16.7

1.8

3.4

2.2

5.0

3.3

2.2

.91

.06

.82

.25

.08

...... <.05

inn

66.3 

16.1

1.2 

2.8 

1.6 

4.6 

3.2 

2.7 

.67 

.07 

.54 

.14 

.07 

<.05

100

2.75

67.5 

15.1 

1.8 

2.4 

1.5 

3.7 

2.7 

3.6 

.69 

.15 

.56 

.09 

.08 

<.05

99

66.5 

15.5 

1.1

3.5 

1.6 

4.2 

3.0 

2.8 

.84 

.10 

.63 

.15 

.08 

<.05

100

Semiquantitative spectrographic

Ag . .. ....... . .. .... .........

B . ... ...... .... ... .......

Ba.. ... .... .....................

Be .................................

Ce...... .......... .............

Co.... .. ...........................

Cr. ... ...........................

Cu. ...................................

Ga ...........................

La ............................

Li .... . .............. .... ..

Nb.. .......... ................ ..

Ni.. .......... ........... . .

Pb. .............. ............

Sc .. ..

Sn... ...... ...

Sr ........ ...

V

Y

Yb .. ..

Zr .. .

N

N

...... 700

N

N

...... 10

....... 15

2

20

...... 30

N 

10

5

.. 30 

15

N

.... 1,000

.... 100

....... 20

1.5

..... . 70

0.7 

N 

700 

1.5 

N 

10 

10 

50 

15 

N 

N 

10 

5 

30 

10 

N 

500 

70 

20 

2 

150

N 

N 

1,000 

N 

N 

10 

101

15 

N 

N 

10 

2 

15 

15 

N 

500 

100 

20 

2 

100

N 

N 

1,000 

1.5 

N 

10 

10 

1 

20 

30 

N 

10 

1 

15 

15 

N 

500 

70 

30 

3 

150

69.6 

15.3 

.88 

2.2 

1.1 

3.0 

2.7 

3.4 

.85 

.35 

.48 

.09 

.06 

<.05

100

60.1 

17.2 

2.1 

4.0 

2.7 

5.9 

3.3 

2.1 

1.2 

.18 

.91 

.22 

.11 

<.05

100

59.2 

17.6 

2.0 

4.6 

2.9 

6.2 

3.2 

2.0 

.80 

.11 

.96 

.24 

.11 

<.05

100

57.4 

17.8 

2.3 

4.8 

3.1 

6.7 

3.1 

2.0 

1.2 

.16 

1.0 

.25 

.12 

<.05

100

65.5 

16.1 

1.4 

3.4 

1.0 

3.0 

3.4 

3.9 

1.4 

.87 

.59 

.18 

.07 

<.05

100

66.9 

16.2 

.85

3.5 

.63 

3.4 

3.8 

2.7 

.74 

.11 

.43 

.16 

.08 

<.05

100

analyses (parts per million)

N 

N 

700 

1 

N 

5 

10 

L.7 

20 

30 

N 

10 

2 

20 

5 

N 

500 

50 

15 

1 

100

N 

N 

700 

N 

N 

20 

15 

10 

20 

30 

N 

10 

7 

15 

20 

N 

700 

150 

30 

3 

100

N 

N 

700 

N 

N 

20 

15 

15 

15 

30 

N 

10 

7 

30 

20 

N 

700 

150 

30 

2 

150

N 

N 

700 

N 

N 

20 

20 

15 

20 

30 

N 

10 

7 

7 

20 

N 

700 

150 

30 

3 

200

N 

N 

1,500 

1.5 

100 

7 

5 

10 

20 

70 

N 

20 

N 

10 

15 

N 

500 

30 

5 

3 

200

N 

N 

2,000 

1 

150 

3 

3 

3 

15 

70 

N 

10 

N 

15 

15 

N 

500 

15 

30 

3 

300

CIPW norms (weight percent)

Q ... ... .... ................

C .. ... .......................

ab. ...... ...................

hi . .. ....................

fs.... ....... .... ... . mt. .... .... ....... ............

il .

fr. ...... ....... .. .. ..

Total ... ... .......

20.6

.4

13.0

28.0

23.2

5.5

3.6 

2.6

1.6

.6

99.1

24.0

16.6" 

27.1 

21.6 

.........

4.0 

4.4 

1.7 

1.0 

.3

99.2

27.2 

.3 

21.3 

22.9 

17.8

317 

2.1 

2.6 

1.1

2

99.2

25.3 

.3 

16.6 

25.4 

19.9

4.0 

4.6 

1.6 

1.2 

.4

99.3

31.9 

1.9 

20.1 

22.8 

14.3

2/7 

2.6 

1.3 

.9

.2

98.7

15.3

12.4" 

27.9 

25.9

".8 

6.7 

4.3 

3.0 

1.7 

.5

98.5

11.6

ii.'s

26.3 

28.8

"i"2" 

7.7 

5.5 

3.3 

1.9 

.6

98.7

13.9

27! 1 

27.8 

.......

7.2 

5.4 

2.9 

1.8 

.6

79.1

24.9 

2.2 

17.7 

28.8 

13.7

"i'.s"

4.2 

2.0 

1.1 

.4

97.5

24.5 

1.2 

16.0 

32.3 

15.9

"i.'e"

5.2 

1.2 

.8 

.4

99.1

Modes (volume percent)

Potassium feldspar.. ...

Mafic minerals ........ .. .

Total........ ...........

Bulk specific 

gravity . ...... .... ..........

...... 23

5 

.. ... 51

21

...... 100

2.73

31 

16 

36 

16

99

2.72

28 

17 

39 

16

100

2.71

23 

12 

48 

17

100

2.75

26 

19 

43 

12

100 

2.67

18

3

57

22

100

2.78

17 

1 

61 

21

100

2.77

17 

2 

53 

28

100 

2.80

27 

13 

45 

15

100

2.67

26 

22 

42 

11

101

2.70
A16 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

TABLE 1. Chemical and spectrographic analyses, norms,

Quartz monzonite of 

Dinkey Dome

SiO

A12O3.................... ........

FeO ...................... ......

MgO...............................

CaO ...............................

NasO... ..........................

K20... .............................

H.O ............................

P"Oa

MnO.. ...... .....................

CO:...............................

Cl.. ................................

F

Less O...... ... .... .

Powder density 

(gm/cc).... ...............

HL-29(1)

......... 78.37

......... 11.73

......... .33

........ .74

......... .20

......... .86

......... 3.35

......... 3.31

........ .25

......... .04

........ .14

......... .02

......... .05

......... .01

......... .02

......... .01

......... 99.41

........ 2.67

HL-29(2)

75.4 

13.5 

.00 

.64 

.1 

1.0 

4.0 

4.6 

.34 

.04 

.15 

.07 

.04 

<.05

100

HLb-10

Chemical

73.1 

13.7 

.64 

1.6 

.22 

1.5 

3.3 

4.7 

.53 

.10 

.20 

.06 

.05 

<.05

100

HLb-122 HLc-129

analyses (weight percent) 

76.3 

13.1 

.37 

.40 

.05 

.59 

2.8 

5.7 

.36 

.05 

.05 

.02 

.08 

<.05

100

73.0 

15.0 

.33 

1.7 

.39 

1.4 

3.5 

4.2 

.50 

.04 

.20 

.10 

.08 

<.05

Semiquantitative spectrographic analyses (parts

Ag .................................

B ...................................

Ba..................................

Be.... ..........................

Ce.... ..............................

Co..................................

Cr........ ..........................

Cu...... ............................

Ga............ ...................

La. . ..............................

Li...... ........... .... .. .. .

Nb.................................

Ni...................................

Pb..................................

Sc....... ............................

Sn................................

Sr... ...............................

V............. . .....

Y................ ...............

Yb.......................... .

Zr.. .........

Q

c....................................

ab.. ................................

hi... ............................

wo............. ... ...... ...

fs...................................

mt. ................................

il....................................

fr........ ..........................

Total.................

......... N

......... N

......... 700

......... 1.5

......... N

......... N

.. ... N

......... 1.5

........ 7

......... 70

......... N

......... 15

.......... N

.... ... 30

.......... N

. N

......... 300

.......... N

......... 15

.......... 1.5

.... .. 70

.......... 44.08

.......... 1.19

.......... 19.68

......... 28.45

.......... 4.03

......... .01

.......... .50

.......... .95

.......... .48

......... .27

.......... .05

.......... .04

......... 99.73

N 

N 

1,500 

1 

N 

N 

N 

.3 

10 

30 

N 

10 

N 

20 

N 

N 

150 

7 

15 

1.5 

150

32.0 

.3 

27.2 

33.9 

4.5

........ 

1.0

""3"

.2

99.7

N 

N 

1,500 

2 

N 

N 

1 

7 

20 

50 

N 

10 

N 

20 

10 

N 

300 

N 

30 

2 

150

CIPW

31.7 

.6 

27.9 

28.0 

7.1

........

2.2 

.9 

.4 

.1

99.5

N 

N 

300 

N 

N 

N 

N 

1 

10 

N 

N 

N 

N 

70 

N 

N 

50 

N 

20 

2 

70

norms (weight

36.7 

1.3

33.7 

23.7 

2.8

........

.5 

.5 

.1

99.5

N 

N 

700 

5 

N 

N 

1 

L.7 

20 

30 

200 

15 

N 

15 

5 

7 

200 

7 

30 

2 

100

percent) 

31.9 

2.4 

24.7 

29.5 

6.3

'i'.'d"

2.7 

.5 

.4

2

99.6

HLd-128

 Continued

76.9 

13.1 

.00 

1.1 

.04 

.43 

3.7 

4.1 

.43 

.07 

.02 

.06 

.08 

<.05

100

per million) 

N 

10 

150 

5 

N 

N 

N 

L.7 

20 

N 

N 

15 

N 

30 

3 

5 

20 

N 

20 

2 

20

Continued

37.9 

1.9 

24.2 

31.3 

1.7

2^1 

'.1

99.5

HLd-133

72.8 

14.6 

.43 

1.7 

.39 

1.5 

3.5 

4.0 

.65 

.11 

.21 

.10 

.08 

<.05

100

- Continued

N 

N 

700 

7 

N 

2 

1 

L.7 

20 

N 

200 

15 

N 

30 

5 

7 

200 

10 

30 

3 

100

32.4 

2.0 

23.6 

29.6 

6.8

2^6 

.6

.4

.2

99.4

Quartz 

monzonite 

of 

Shorthair 

Creek

HLd-13

73.1 

14.3 

.45 

1.5 

.56 

2.0 

2.9 

4.2 

.63 

.10 

.23 

.06 

.06 

<.05

100

N 

10 

500 

2 

N 

3 

5 

1 

15 

N 

L200 

7 

N 

70 

3 

N 

200 

20 

15 

2 

70

34.2 

1.5 

24.8 

24.5 

9.5

"\A"

2.1

.7 

.4 

.1

99.2

Quartz 

monzonite 

of 

Lower 

Bear Creek

HLc-72

73.7 

14.2 

.59 

1.1 

.20 

1.1 

3.2 

4.8 

.63 

.18 

.16 

.05 

.02 

<.05

100

N 

N 

1,500 

1.5 

100 

N 

1 

7 

15 

50 

N 

15 

N 

30 

7 

N 

200 

N 

10 

1 

100

33.6 

1.9

28.4 

27.1 

5.1

' .5" 

1.3 

.9 

.3 

.1

99.2

Quartz 

monzonite 

north of 

Snow 

Corral 

Meadow

HLd-79

73.7 

13.7 

.44 

1.6 

.41 

1.6 

3.1 

4.3 

.35 

.15 

.24 

.06 

.04 

<.05

100

N 

10 

700 

N 

N 

N 

1 

L.7 

15 

N 

N 

7 

N 

30 

N 

N 

200 

15 

10 

1.5 

150

34.4 

1.2 

25.5 

26.3 

7.6

To

2.3 

.6 

.5 

.1

99.5

Modes (volume percent) Continued

Plagioclase....... ...........

Mafic minerals...........

Total.. ..............

Bulk specific 

gravity.. .......... . .

39

.......... 31

.......... 28

.. ..... 3

.......... 101

........... 2.57

33 

26 

38 

3

100 

2.64

32 

49 

18 

1

100 

2.61

32 

26 

36 

6

100 

2.65

34 

38 

25 

3

100 

2.64

28 

28 

39

5

100 

2.62

31 

31 

33 

6

101 

2.62

33 

34 

32

2

101 

2.62

32 

30 

34 

5

101 

2.64
HUNTINGTON LAKE QUADRANGLE, CALIFORNIA ANALYTIC DATA

and modes of representative granitic rocks Continued

A17

Mount 

Givens 

Granodiorite

HLb-61

66.8

15.6

1.7

2.3

1.6

3.7

3.0

3.4

.93

.17

.59

.16

.08

<-05

100

Granodiorite 

of 

Red Lake

HL-^(l)

68.6

16.0

1.9

1.6

.92

3.0

3.3

3.0

.50

.12

.51

.24

.11

.05

100

HL-4(2)

70.0

15.2

1.3

1.4

.90

3.3

3.7

2.8

.57

.07

.46

.16

.05

<.05

100 

2.65

HLa-30

69.7

15.5

.39

2.1

.74

2.8

3.3

3.8

.80

.13

.47

.14

.05

<.05

100

HLa-111

Chemical analyses

68.3

15.8

1.3

2.0

1.2

3.1

3.4

2.8

1.0

.31

.52

.12

.08

<.05

100

Granodiorite Granodiorite 

of of 

Eagle Peak Big Creek

HLd-5

(weight percent)

68.3

15.9

1.8

2.3

1.1

3.1

3.0

3.4

.73

.09

.53

.15

.07

<.05

100

Semiquantitative spectrographic analyses (parts

N 

N

700

N

N

10

10

7

15

N

N

15

2

30

10

N

500

100

20

2

100

N 

10

1,000

1.5

N

5

2

3

15

30

N

10

N

20

5

N

1,000

50

10

1

300

0.7

N

1,000

2

70

10

3

5

15

30

N

10

2

.30

3

N

700

50

10

1

150

N

N

1,500

N

N

3

1.5

10

20

30

N

10

N

20

5

N

700

30

15

1

150

N 

N

1,500

N

100

7

5

2

20

50

N

N

1

15

7

N

700

50

10

1

150

1

N

1,500

1

100

7

3

1

20

50

N

7

N

30

7

N

700

50

15

2

150

CIPW norms (weight percent) 

25.6 

.6

20.1

25.4

17.3

4.0

2.0

2.5

1.1

.4

99.0

30.5 

2.4

17.8

28.0

13.3

2.'3"

.7

2.8

1.0

.6

99.4

29.5 

.5

16.6

31.3

15.3

22"

'.8

1.9

.9

.4

99.4

28.0 

1.2

22.5

27.9

13.0

"O"

2.9

.6

.9

.3

99.1

28.9 

1.8

16.6

28.8

14.6

"3.0"

1.9

1.9

1.0

.3

98.8

28.9 

2.0

20.0

25.3

14.3

"i'.T

2.0

2.6

1.0

.4

99.2

HLd-5 1

 Continued

70.9

15.2

1.0

1.5

.67

2.5

3.1

3.8

.64

.07

.36

.12

.04

<.05

100

per million) -

N 

N

1,500

1.5

N

3

3

2

20

N

N

10

N

30

3

N

700

30

15

1

150

Continued

31.7 

1.7

22.5

26.3

11.6

"i'.i"

1.4

1.5

.7

.3

99.4

HLa-62

69.7

14.7

.65

2.5

1.2

3.1

3.2

3.7

.44

.08

.48

.11

.05

<.05

100

- Continued

N 

N

1,500

2

70

7

10

.7

20

50

N

10

2

20

7

N

500

50

20

1.5

100

27.3 

.1

21.9

27.1

14.7

"30"

3 A

.9

.9

.3

99.6

Quartz 

monzonite 

of Bald 

Mountain

HLc-2

75.3

13.5

.19

.92

.15

1.1

3.1

4.6

.66

.15

.09

.04

.04

<.05

100

N 

N

700

3

N

N

5

.7

15

N

L200

7

N

10

N

N

150

5

10

.7

50

36.6 

1.5

27.2

26.3

5.2

........

1.5

.3

.2

.1

99.3

Medium- to 

fine-grained 

quartz 

monzonite

HLb-114

73.6

14.1

.73

.88

.44

1.5

3.7

3.8

.67

.11

.21

.09

.05

<.05

100

0.7

N

1,500

2

100

N

1

1

15

50

N

10

N

50

N

N

500

20

10

.7

150

33.6 

1.4

22.5

31.3

6.9

"LI

.8

1.1

.4

 2

99.3

HLd-61

73.2

13.5

1.4

1.3

.52

1.1

2.3

5.5

.68

.14

.27

.07

.07

<.05

100

N 

10

300

N

N

3

1.5

2

15

N

N

N

N

50

3

N

150

15

N

7

100

35.4 

1.9

32.5

19.5

5.0

"O"

.9

2.0

.5

.2

99.2

Modes (volume percent) Continued

27

19

41

13

100

2.69

28

14

50

9

101

2.67

26

15

50

9

100

2.67

19

26

46

9

100

2.67

27

18

50

5

100

2.70

28

28

37

6

99

2.65

30

20

40

10

100

2.68

31

34

33

2

100

2.61

29

28

40

3

100

2.63

32

40

24

5

101

2.63
A18 SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY

TABLE 2. Potassium-argon age determinations on biotite and hornblende from granitic 

rocks of the Huntington Lake quadrangle

[Determinations for HL-4, HL-29, and HL-9 from Kistler, Bateman, and Brannock (1965, p. 158, table 1). 

Determinations for other samples are by R. W. Kistler; K analyses by Lois Schlocker. X/3=4.72X10 lo 

year-1 ; Xe=:0.584X10-10 year-1 ; 1.19X10-4 atoms K4o /atoms K. Estimated uncertainty (due to analytic 

uncertainties of potassium and argon) of each age at the 68-percent confidence level is ±3.0 percent]

K r Al. 40 Percentage 

Specimen Rock unit Mineral ^weight gnote/g ^ radi °genic

HL-4 Granodiorite of Red Lake............Biotite...........?. 12 106.3 82 85

HLa-80 ......do....................................................do...........7.31 117.43 88.3 89

HLd-6 Granodiorite of Eagle Peak................do...........6.88 108.48 86.7 95

HLa-46 Granodiorite of Big Creek..................do...........7.58 118.87 86.3 89

HLa-16 Quartz monzonite of Bald ......do...........7.42 120.06 88.9 84

Mountain. 

HL-29 Quartz monzonite of Dinkey ......do........... 6.77 102.5 83 57

Dome. 

HLc-126 ......do....................................................do...........7.79 124.15 87.6 98

HLd-102 .... .do....................................................do...........7.79 123.77 87.5 92

HLc-68 Quartz monzonite of lower ......do...........7.26 119.35 90.3 94

Bear Creek. 

HLd-20 Quartz monzonite north of ......do...........6.67 105.11 86.6 88

Snow Corral Meadow. 

HL-9 Granodiorite of Dinkey Creek............do...........7.46 112.3 83 76

Hornblende.. .83 13.35 88 78

U. S. GOVERNMENT PRINTING OFFICE : 1972 O - 476-248