STATUS OF MINERAL RESOURCE INFORMATION FOR THE YAVAPAI

INDIAN RESERVATION YAVAPAI COUNTY, ARIZONA

by

Jocelyn A. Peterson L. G. Nonini

U.S. Geological Survey U.S. Bureau of Mines

Prepared by

U.S. Geological Survey and U.S. Bureau of Mines

for

U.S. Bureau of Indian Affairs

Administrative Report BIA-64

1980
CONTENTS

SUMMARY AND CONCLUSIONS ................................................. 1

INTRODUCTION ................................................................ 1

PREVIOUS INVESTIGATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MAP COVERAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

GEOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Precambrian ............................................................... 3

Paleozoic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Tertiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Quaternary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

STRUCTURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

MINERAL RESOURCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Metallic Mineral Deposits .................................................... 5

Gold Placers ......................................................... 5

Gold and Silver Veins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Massive Sulfide Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Tungsten Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Mercury (Quicksilver) Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Nonmetallic Mineral Deposits ................................................. 7

Sand and Gravel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Decomposed Granite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Barite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Olivine (Peridot) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Building Stone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

RECOMMENDATION FOR FUTURE WORK ......................................... 8

REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

_________________________________________________________________________________________________

BIA Administrative Report 64 (1980) 1

SUMMARY AND CONCLUSIONS

The Yavapai Indian Reservation is in a mineralized region. In the past, the region has produced

significant quantities of copper, gold, lead, silver,

and zinc, and minor amounts of barite, building

stone, mercury, and tungsten. Fluorite and olivine

have been identified but have not been found in

quantities sufficient to warrant investigation.

In recent times, the reservation has produced

about 245,000 cubic yards of sand and gravel, an

estimated 500,000 cubic yards of decomposed

granite fill, and a small amount of placer gold.

From 1863 until 1965, the present Yavapai

Indian Reservation was part of a Military Reservation known as Fort Whipple. Because of this

status, the reservation probably has not been

prospected thoroughly, and the mineral potential,

if any, is unknown.

INTRODUCTION

This report was prepared for the Bureau of

Indian Affairs (BIA) by U.S. Geological Survey

(USGS) and the Bureau of Mines (USBM) under

an agreement to compile and summarize available

information on the geology, mineral resources, and

potential for economic development of certain

Indian lands. Source material included published

and unpublished reports and personal communications. No fieldwork was done.

The Yavapai Indian Reservation is immediately

adjacent to and northeast of the city of Prescott,

Yavapai County, Ariz. (Figure 1). The reservation

surrounds the Whipple Veterans Administration

Reservation on three sides; the two reservations

and a city park form a diamond-shaped parcel of

land with the long axis bearing northwest about 3.5

miles and the short axis bearing northeast about 1.5

miles. The area occupied by the Yavapai Indian

Reservation totals 1,409 acres (Bureau of Indian

Affairs, 1978).

The reservation is hilly, bisected along its short

axis by the intermittent, northeast flowing Granite

Creek, which is the principal stream draining the

Prescott area. A number of ephemeral streams that

flow into Granite Creek and its tributaries, Slaughterhouse Gulch and Government Gulch, drain the

reservation.

Relief is about 620 feet between a hill in the

southeast sector at about 5,880 feet elevation and

the bed of Granite Creek where it flows out of the

reservation near the northeast corner at an elevation of about 5,260 feet.

Transportation facilities are good. State Highway 69 crosses east-west through the southern part

of the reservation, and U.S. Highway 89 passes

north-south through the central part of the reservation. A branch line of the Atchison, Topeka &

Santa Fe Railway runs northwest through the

central part of the reservation. Commercial truck

and bus service is available in Prescott. Commercial airlines use an airport about 6 miles north of

the reservation.

Two high-voltage electrical transmission lines

cross the reservation, one northeasterly in the

central part and one north-south in the northwestern corner. One gas pipeline of the Southern Union

Gas Co. crosses the northwest corner of the reservation.

The climate is semiarid; annual rainfall averages slightly over 19 inches. The highest recorded
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 2

annual rainfall was 35.94 inches in 1965, and the

lowest was 6.88 inches in 1956. The wettest period

is usually from early July through mid-September,

and the driest is generally during May and June.

Seldom do summer temperature rise to 100F or

winter temperatures fall to 0F. Freezing winter

nights are common, and about half the winter

precipitation falls as snow (Sellers and Hill, 1974).

Present grazing on the reservation is limited to

about 40 head of livestock. A creosote-pine-pole

factory is in operation and a site is being developed

for a small commercial park. Plans are also being

considered for suburban and commercial development on parts of the reservation.

PREVIOUS INVESTIGATIONS

Areas around the Yavapai Indian Reservation

have been the subject of considerable study, partly

because of the occurrence of numerous mineral

deposits. No specific study of the reservation has

been made, but it is within a larger area (two

quadrangles) studied geologically by Kreiger

(1965). No mineral deposits on the reservation are

mentioned in the report, but geologic map (plate 1

of the report) shows veins, dikes, a fault, a large

shear zone, and gravel deposits.

Principal mines of the region were the United

Verde, the United Verde Extension, and the Iron

King Mine; all have been inactive for years. These

by properties are described Creasey (1952), Anderson and Creasey (1958, Kreiger (1965), Gilmour

and Still, (1968), Wilson and others (1934) and

Lindgren (1926). Lesser deposits of the region are

described by Eilers (1872), Blandy (1883), Jaggar

and Palache (1905), Lingren (1926), Lausen and

Gardner (1927), Wilson and others (1934), Wilson

(1941), Wilson and Fansett (1961), Dale (1961),

Kreiger (1965) and others.

MAP COVERAGE

The reservation is shown on a U.S. Geological

Survey 15-minute quadrangle topographic map

entitled "Prescott" and on a 7 1⁄2-minute quadrangle

topographic map also entitled "Prescott." These are

at scales of 1:62,500 and 1:24,000, respectively. A.

U.S. Army Map Series (AMS) 1:250,000-scale

map, NI 12-4, Series V502, entitled "Prescott",

also covers the reservation. Geology is shown on

the Arizona Bureau of Mines and U.S. Geological

Survey map "Geologic Map of Arizona" at a scale

of 1:500,000. All of these maps are available from:

Branch of Distribution, U.S. Geological Survey

Federal Center, Denver, Colorado 80225.

A geologic map of Yavapai County, including

the reservation, has been published (1958) at a

scale of 1:375,000 by the Arizona Bureau of

Mines. This is available from the Arizona Bureau

of Geology and Mineral Technology, 845 North

Park Avenue, Tucson, Arizona 85719.

Aerial photographs can generally be obtained

from the U.S. Geological Survey, the Forest Service, and the Soil Conservation Service of the U.S.

Department of Agriculture. Satellite imagery can

be obtained from the EROS Data Center, U.S.

Geological Survey, Sioux Falls, South Dakota

57198.
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 3

GEOLOGY

Krieger's professional paper (1965) includes a

geologic map of the Prescott 15' quadrangle and

contains the only detailed study of the geology and

ore deposits in the immediate area. Anderson and

Creasy (1958) presented detailed work from the

Jerome mining district to the east of Prescott. In

subsequent publications, Anderson and Blacet

(1972) and Anderson and others (1971) revised the

stratigraphic sequences outlined by the earlier

authors. The geologic discussion below is taken

from Kreiger (1965) except where indicated.

Figure 2 shows the geology of the reservation and

surrounding area.

Within the Prescott quadrangle are volcanic,

sedimentary, and intrusive rocks representing the

Precambrian, Paleozoic, and Cenozoic eras.

Precambrian.-- The Yavapai Series, the oldest

Precambrian unit, contains the Ash Creek Group

(not found in the Prescott area) and the Big Bug

Group. Basalt, andesite, and rhyolite flows and

tuffaceous sedimentary rocks characterize formations in the Big Bug Group. Zircon age determinations from the Big Bug Rhyolite date it at 1175+10

m.y.(Anderson and others, 1971) which makes the

Yavapai Series Precambrian X in age. Overlying

the Yavapai Series in areas northeast of Prescott is

the fine- to coarse-grained quartzite (with minor

conglomerates and small amounts of argillite) of

the Mazatzal Quartzite. Although gabbros,

granodiorites, granites, and alaskites intrude the

older Precambrian rocks, only the Government

Canyon and Prescott Granodiorites crop out near

Prescott. Krieger (pers. commun.) considers them

to be Precambrian Y in age. The reservation lies on

the northern extension of one mass of Prescott

Granodiorite and the Government Canyon granodiorite (Figure 2). The granodiorite's fresh surfaces

are medium to light gray or greenish gray and

weathered surfaces are varying shades of orange. In

order of abundance the rock contains plagioclase,

quartz, biotite, epidote, and accessories of sphene,

magnetite, ilmenite (?), apatite, and zircon. Mild

regional metamorphism has altered the grandiorite

and the presence of quartz, quartz-tourmaline, and

tourmaline veins suggest that hydrothermal fluids

may have affected it in places. 

Paleozoic.-- Paleozoic rocks only appear

beyond 20 km north of Prescott. They are the

Cambrian Tapeats Sandstone, the Devonian Martin

Limestone, the Mississippian Redwall Limestone,

the Pennsylvanian Supai Formation, and the

Permian Coconino Sandstone which are also found

in the Grand Canyon region.

Tertiary.--Although many different sedimentary and volcanic rocks formed during the Tertiary,

only basalts and sedimentary rocks occur near

Prescott. Glassford Hill northeast of Prescott is a

basalt cone; other basalts crop out southwest and

southeast of the reservation. Sheets 3 to 6 m thick

containing ropy lava and bombs characterize the

basalt flows. A groundmass of felty plagioclase

crystals in a mafic base of augite, olivine, magnetite, and apatite surround olivine, magnetite, augite,

and plagioclase phenocrysts that average 1 mm in

length. Tertiary sedimentary rocks, which are more

abundant than the volcanic rocks, are exposed in

several places on the reservation (Figure 2). They
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 4

include fanglomerates and mudflows with interbedded tuffs adjacent to the mountains and gravelly, sandy, and silty material containing small

amounts of marl and rhyolite tuffs in the basins.

Except near source areas, the gravels are composed

of a heterogeneous mix of Precambrian rock

fragments. Some rocks are well cemented (usually

with calcite); others are barely consolidated. Near

Prescott these Tertiary rocks lie directly over the

Precambrian basement.

Quaternary.--Once extensive pediment gravels

that now crop out in a small area south of the

reservation are composed of a heterogeneous mix

of boulders, cobbles, and finer material derived

from rocks of all ages. Recent alluvium occurs in

basins and along gulches.

STRUCTURE

Deformation during the Precambrian, although

intense, did not affect the granites near the Yavapai

Reservation. Normal faulting, development of

sharp monoclines, and gentle folding since the end

of the Paleozoic have affected strata near the

reservation.

MINERAL RESOURCES

General

Mining has been practiced in the Prescott

region since prehistoric times as evidenced by

stone implements recovered from ancient mine

workings (Anderson and Creasey, 1958; Galbraith

and Brennan, 1970). Recorded mining activity in

the region commenced in 1863 with the discovery

of placer gold on Hassayampa River and Lynx

Creek (Eilers, 1872). Lode mining began shortly

thereafter for gold and silver in the oxidized portions of numerous vein deposits that occur

throughout the region. As metallurgical techniques

improved, attention was turned to sulfide ores, and

three deposits--United Verde, United Verde Extension, and Iron King--became major producers until

the last of the three, the Iron King, closed down in

1968 (records of the Arizona Department of Natural Resources).

Mineral commodities that have been produced

in the region include barite, copper, gold, lead,

mercury, sand and gravel, silver, tungsten, and

zinc. Occurrences of fluorite and olivine have been

reported in the region (Kreiger, 1965), but no

discoveries have been made that warrant further

consideration.

Upon the discovery of gold in the Prescott

region, Federal troops were dispatched to protect

the miners, and Fort Whipple was established in

1863. In 1935, Congress set aside 75 acres of Fort

Whipple as the Yavapai Indian Reservation, and in

1965 additional acreage was added to the reservation (U.S. Department of Commerce, 1974). About

250 acres of Fort Whipple is still held by the U.S.

Veterans Administration for a Veterans Hospital,

and about 50 acres is used as a City Park.

Because the entire Yavapai Indian Reservation

has been held as a Military Reservation virtually

since prospecting in the region first began, it is

likely that it has not been explored thoroughly.

Sand and gravel and some gold have recently been

produced on the reservation from alluvial deposits

along Granite Creek. Kreiger (1965) has noted the
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 5

presence of quartz veins, dikes, and two major

fault zones on the reservation. In other parts of the

region, similar structures have been associated

with mineralization.

Metallic Mineral Deposits

	


In 1862 and 1863, a party of prospectors led by

Joseph R. Walker found placer gold in the

Hassayampa River, Groom Creek, Bib Bug Creek,

Lynx Creek, and Granite Creek (Wilson and

Fansett, 1961). These streams drain the areas west,

south, and east of Prescott. Gold deposition resulted from the erosion of numerous quartz veins

(Kreiger, 1965) that occur in the region. Placer

mining commenced in 1863 and continued until

the World War II period. Estimates of early production and incomplete recorded production

figures suggest that approximately $6,000,000

worth of gold may have been taken out of the

placers.

Granite Creek, a known gold-bearing stream,

flows through the reservation and was mined for

gold both above and below the reservation.

Whether or not gold was mined from that portion

of the stream within the reservation or from its

tributaries within the reservation is not known.

A sand and gravel lease in force since August

1965, and under consideration for renewal in 1979

cites placer gold and silver as commodities that

could be recovered. A small amount of gold is said

to have been produced, but records indicate that

none is being produced now. (Production records

of the BIA, Phoenix, Arizona 1979).


	
	

The Prescott region contains numerous fissure

veins that attracted early attention because of gold

and silver values. Descriptions of the mining

operations by Eilers (1872), Blandy (1883), Lindgren (1926), and Wilson and others (1934) effectively portray the part these veins played in the

early days of the region. On the surface, some of

the veins were very high in grade and continued to

be so down to where the "sulphurets" were not

amenable to the ore dressing methods in practice at

that time (Blandy, 1883). As a consequence, the

operations were abandoned.

Lindgren (1926) considered that there were two

basic types of veins in the region: 1. Precambrian

veins, containing massive quartz, minor amounts

of ankerite, siderite, and tourmaline and carrying

free gold, pyrite, chalcopyrite, sphalerite, and

galena in small amounts; he estimated that less

than $1,000,000 worth of gold came from these

veins. 2. Veins that Lindgren thought to be much

younger, possibly late Mesozoic or early Tertiary

in age. They contain milky, drusy quartz, usually

with ankerite and some with barite, fluorite, albite,

and adularia. Sulfides in small amounts include

arsenopyrite, pyrite, sphalerite, chalcopyrite,

galena, tetrahedrite, and proustite or pyrargyrite.

The valuable commodity was gold or silver or a

mixture of both. Gold is associated with the arsenopyrite and pyrite, the silver with the tetrahedrite and galena. Tungsten minerals have also

been found in these younger veins, which have

been more productive than the older veins; Lindgren (1926) estimated that values in the range of
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 6

$18,000,000 had been produced from the younger

veins.

	
		

Massive sulfides deposits with little or no

gangue minerals have been by far the most productive type of ore body found in this part of Arizona.

The United Verde and United Verde Extension

mines, located about 23 miles northeast of the

reservation, produced about 1,890,000 ounces of

gold, 65,600,000 ounces of silver, 1,868,000 tons

of copper 37,725 tons of lead, and 127,000 tons of

zinc between 1883 and 1953 (Anderson and

Creasey, 1958). The Iron King mine, located about

8 miles southeast of the reservation, was operated

sporadically from 1906 to 1937 and then continuously until 1968. During that time, it produced

693,454 ounces of gold, 20,626,053 ounces of

silver, 143,717 tons of lead, 419,185 tons of zinc,

and 11,328 tons of copper. At present, (1980) old

mill tailings are being processed for use as a soil

conditioner (Record of the Arizona Department of

Mineral Resources).

The primary minerals found in the massive

sulfide deposits have been predominantly pyrite

with lesser amounts of chalcopyrite, sphalerite, and

galena. Host rocks commonly are silicified and

sericitized, and the deposits are believed to have

been formed by replacement (Lindgren, 1926). 

		

At least 20 veins or groups of veins containing

tungsten minerals, either scheelite or wolframite or

both, occur within a radius of about 25 miles of

Prescott to the southwest, south, and southeast

(Dale, 1961). A number of these veins have been

worked for gold and silver and some were worked

only for tungsten (Lindgren, 1926, Wilson, 1941,

and Dale, 1961). The veins generally contain

quartz, tourmaline, and epidote, often with pyrite,

arsenopyrite, sphalerite, chalcopyrite, bornite, and

other sulfide minerals. The tungsten minerals are

scattered and range in size from microscopic

particles up to pieces 2 inches in diameter. The

host rocks are granite, pegmatitic material, and

schist.

Early production was obtained from float and

the reworking of old dumps about the time of

World War I, but the greatest interest in tungsten

appears to have been during the 1950's. None of

the deposits were large producers with much of the

production being measured by the tens or hundreds

of pounds of handpicked ore or concentrate.

It is calculated, from production estimates

made by Dale (1961), that total production of

tungsten concentrate from the Prescott region was

only 37 tons during the 1916-1956 period.

	

	
	

About 10 miles southwest of Prescott in an

area known as "Copper Basin," a number of workings were created in exploration for mercury, The

mercury occurs as cinnabar, a sulfide mineral, in

veins of chalcedonic quartz that are enclosed in

granite and grabbro, usually accompanying dikes

of andesite or rhyolite porphyry (Lausen and

Gardner, 1927).

In 1904, two or three flasks of mercury were

produced for local use in amalgamation. In 1924,
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 7

four groups of claims were staked, and some

exploration work was done. A small amount of ore

was produced, but no report of metal production

was found. 

Nonmetallic Mineral Deposits



	

Sand and gravel is found in bars and embankments along the stream bed of Granite Creek.

Reserves have not been determined, and any prior

estimates would be suspect because it appears that

the deposits have been rearranged and shifted from

time to time by flood waters.

At least four private operators and the Arizona

State Highway Department have mined sand and

gravel on reservation land since 1959 (Records of

the BIA, Phoenix office). One of the leases held by

Charles O. Prose provides for the mining of placer

gold and silver as well as sand and gravel.

Production records of the BIA show:

Year Leases Production (yds3) Tribal Income

1974 2 98,077* $34,534.79

1975 2 71,497* $25,860.81

1976 1 23,506 $ 6,770.25

1977 2 50,187 $15,473.20

*Converted from tons by the factor 1.5 tones = 1 cubic yard.

Some gold was produced before these records

were started.

		
	

South of State Highway 69, 1.5 to 2 miles east

of Prescott, decomposed granite has been mined

from two pits in Government Gulch (Kreiger,

1965). This material is similar to that found in

many other deposits in the Prescott area. It is used

as fill in road construction and other construction

work. Because the feldspar has been altered to

clay, the material is not well-suited to construction

(BIA, Phoenix office files). For road construction,

it must be covered with crushed rock and blacktop

or concrete to be acceptable. The decomposed

granite was mined by two lessees between 1966

and 1975 at royalty payments ranging from 15

cents per cubic yard in 1966 to 23 cents per cubic

yard in 1`975. Neither deposit was considered to

have large reserves, and they may now be worked

out. Tonnages mined on the reservation were not
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 8

available, but they have been estimated at approximately 500,000 yards. Recent BIA production

reports show no figures for decomposed granite. If

the demand warrants, similar deposits might be

found elsewhere on the reservation.


	

Barite occurs as a gangue mineral in some of

the silver- bearing quartz veins in the Prescott

region (Blandy 1883; Jaggar and Palache, 1905;

and Lindgren, 1926). One mine, in sec. 2, T. 12 N.,

R. 3 W., about 10 miles southwest of Prescott, has

been worked for barite. The mine was located in

1880 and produced several hundred tons of silver

ore (Stewart and Pfister, 1960). When the mine

was examined in 1958, it had been closed for many

years. Handpicked ore from the dump was sampled, giving results:

Barite 40.4%

Lead 2.2%

Zinc 1.4%

Silver 26 ounces/ton

Gold trace

The vein is in a fault zone in diorite and is

largely quartz with occasional stringers and small

pods of barite. The amount of barite produced is

not known but it was probably minor.

 		


Kreiger (1965) reports phenocrysts of olivine

in basalt, up to 1.5 inches in diameter in one

locality. At least two basalt outcrops are on the

Yavapai Reservation, but whether they contain

phenocrysts of olivine has not been recorded.

Olivine crystals of good size and quality are cut

and polished and used as a gemstone under the

name "peridot." Several places in Arizona produce

gem quality olivine from basalt beds, from basalt

detritus, and from other volcanic rocks. Arizona is

an outstanding producer of this gem stone

(Sinkankas, 1959)


	

Granodiorite and tuffaceous sedimentary rocks

quarried near Prescott have been used as building

stone in the city (Kreiger 1965). Both of these rock

types are found on the Yavapai Reservation. If a

local market demand sufficient to support a building stone industry should evolve, suitable deposits

might be found on the reservation.

RECOMMENDATION FOR FUTURE

WORK

A field examination should be made of the

reservation to include:

1. An examination and sampling of quartz

veins

2. A reconnaissance to determine the possible

existence of mineralized areas and

mineral-related alteration zones.
Status of Mineral Resource Information For The Yavapai Indian Reservation Yavapai County, Arizona

Jocelyn A. Peterson and L. G. Nonini

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BIA Administrative Report 64 (1980) 9

REFERENCES

 Anderson, C. A. and Blacet, P. M., 1972, Precambrian geology of the northern Bradshaw Mountains, Yavapai County, Arizona: U.S. Geological Survey, Bullet£n 1336, B2p.

 Anderson, C. A., Blacet, P. M., Silver, L. T., and

Stern, T. W., 1971, Revision of Precambrian

stratigraphy in the Prescott- Jerome area,

Yavapai County, Arizona: U. S. Geological

Survey, Bullet in 1324-C, 16p.

 Anderson, C. A. and Creasey, S. C., 1958, Geology and ore deposits of the Jerome Area,

Yavapai County, Arizona: U.S. Geological

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Figure 1. Index map of the Yavapai Indian Reservation, Yavapai County, Arizona
Figure 2. Geologic map of the Yavapai Indian Reservation, Arizona, from Krieger, 1965