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Prescott Mining District, Bradshaw Mountains (Bradshaw Range), Yavapai County, Arizona, USAi
Regional Level Types
Prescott Mining DistrictMining District
Bradshaw Mountains (Bradshaw Range)Mountain Range
Yavapai CountyCounty
ArizonaState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
34° North , 112° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~57km
Mindat Locality ID:
52784
Long-form identifier:
mindat:1:2:52784:7
GUID (UUID V4):
2c347b97-de55-475f-bb45-3a8d86be8a3f


This district is located in the northern foothills of the Bradshaw Mountains, between Prescott and the Agua Fria River.

Prescott lies in the basin of Granite Creek, in the area of massive Bradshaw granite that occupies the SW corner of the Jerome quadrangle. The granite is adjoined on the east by the north end of a great mass of Yavapai Schist, which is tremendously injected by granite and pegmatite. Much of the granite rock exhibits a crude schistosity. At the western contact of the schists the rock seems to be mainly a dense amphibolite. At the bridge across Lynx Creek the exposures show fissile schist with cherty beds injected by granite. In the granite are veins of quartz which are themselves cut by veinlets of epidote.

East of the schist the Bradshaw Granite reappears, forming a belt about 2 miles wide, which is in turn adjoined by schist extending to the Agua Fria River. Tertiary volcanic tuffs cover a few areas on the hills near Prescott.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

8 valid minerals.

Detailed Mineral List:

'Chlorite Group'
Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Description: Veinlets cutting quartz veins in granite.
Gold
Formula: Au
Description: Lode gold; coarse.
Malachite
Formula: Cu2(CO3)(OH)2
Description: Coats fractures.
Piemontite
Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Description: Occurs in the Government Canyon and Prescott granodiorites, as small veinvets and disseminated grains.
Pyrite
Formula: FeS2
Description: As crystals & stringers in milky quartz.
Quartz
Formula: SiO2
Quartz var. Milky Quartz
Formula: SiO2
Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Description: Occurs in veins.
Siderite
Formula: FeCO3
Description: Occurs in veins.
'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
Habit: Radial aggregates
Colour: Black
Description: Much occurs in veins with chlorite and siderite.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var. Milky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Siderite5.AB.05FeCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Piemontite9.BG.05a(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified
'Chlorite Group'-
'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
H MalachiteCu2(CO3)(OH)2
H Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
H SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BBoron
B SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
C MalachiteCu2(CO3)(OH)2
C SideriteFeCO3
OOxygen
O Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
O MalachiteCu2(CO3)(OH)2
O Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
O QuartzSiO2
O SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
O SideriteFeCO3
O TourmalineAD3G6 (T6O18)(BO3)3X3Z
O Quartz var. Milky QuartzSiO2
NaSodium
Na SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Al Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Al SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Si Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
Si QuartzSiO2
Si SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Si Quartz var. Milky QuartzSiO2
SSulfur
S PyriteFeS2
CaCalcium
Ca Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Ca Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
MnManganese
Mn Piemontite(CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)
FeIron
Fe Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Fe PyriteFeS2
Fe SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Fe SideriteFeCO3
CuCopper
Cu MalachiteCu2(CO3)(OH)2
AuGold
Au GoldAu

Localities in this Region

Other Regions, Features and Areas containing this locality


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

 
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