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Mariquitta Mine (Marquitta Mine; Mariquita prospect), Middle Camp Mountain, Middle Camp-Oro Fino Mining District, Dome Rock Mountains, La Paz Co., Arizona, USAi
Regional Level Types
Mariquitta Mine (Marquitta Mine; Mariquita prospect)Mine
Middle Camp MountainMountain
Middle Camp-Oro Fino Mining DistrictMining District
Dome Rock MountainsMountain Range
La Paz Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude (WGS84):
33° 39' 55'' North , 114° 18' 18'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Quartzsite3,626 (2017)6.9km
La Paz Valley699 (2011)11.4km
Ehrenberg1,470 (2011)21.5km
Blythe19,208 (2017)27.6km
Brenda676 (2011)33.4km


‡Ref.: Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma County, Arizona, USGS Bull. 451: 81-82.

Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 45-57 (56).

Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 136.

Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geological Survey Branch Bull. 192, Index of Mining Properties in Yuma County, Arizona: 161 (Table 4).

Arizona Bureau of Mines file data.

Yale Peabody GNIS database (NOTE: this database is derived from USGS 1:24,000 topographic map data).

MRDS database Dep. ID file #10102570, MRDS ID M004238; and, Dep. ID #10137608, MAS ID #0040120329.

A small former surface and underground Au-Ag-Cu-Pb-Zn mine located in the SE¼ sec. 22 & sec. 27, T4N, R19W, north of the Oro Fino placers, 6 miles west of Quartzsite, on the eastern edge of the Dome Rock Mountains, at 1,100 feet of altitude, on BLM-administered land. Owned by various operators & Cooper.

Mineralization is a vein deposit. Spotty gold with silver and very minor oxidized base metals occur in a crushed, iron stained, lensing quartz vein along a fracture or fault zone in Mesozoic schist intruded by Laramide quartz monzonite. Wall rocks exhibit strong epidote and chloritization. A fairly large vein of quartz, carrying a little copper and gold, which has been roughly prospected, is the source of the ore extracted from this property. The vein is 1.22 meters wide, strikes S.20ºE. and dips 20ºNE, and lies in a slip or fault between parallel schist strata. The vein varies in width from a few inches to several feet, is fairly persistent in length, and apparently is lenticular.

Medium- to fine-grained quartz-mica schists, apparently intruded by much younger fine- to medium-grained granites or quartz monzonites, are the rocks in the immediate vicinity. The schists strike NW-SE and dip 20º NE, and they contain much epidote and chlorite besides the quartz and mica, with a large percentage of orthoclase feldspar and some unaltered but contorted biotite crystals.

Workings are old and not very extensive and include a shaft(s) and surface operations. This mine was worked intermittently from the late 1800's to the 1940's, producing some 180 tons of ore averaging about 0.6 oz. Au/T and 0.3 oz. Ag/T.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


2 valid minerals.

Detailed Mineral List:

'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 45-57.
'Chlorite Group'
Description: Occurs in altered vein wall rocks.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 161 (Table 4); Arizona Bureau of Mines file data.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Description: Occurs in altered vein wall rocks.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 161 (Table 4); Arizona Bureau of Mines file data.
Orthoclase
Formula: K(AlSi3O8)
Reference: Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 45-57.

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Orthoclase9.FA.30K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-

List of minerals arranged by Dana 8th Edition classification

Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
OOxygen
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O OrthoclaseK(AlSi3O8)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al OrthoclaseK(AlSi3O8)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
SiSilicon
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si OrthoclaseK(AlSi3O8)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
KPotassium
K OrthoclaseK(AlSi3O8)
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2

Other Databases

USGS MRDS Record:10102570

Other Regions, Features and Areas containing this locality

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