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La Paz Mining District (Weaver Mining District), Dome Rock Mountains, La Paz Co., Arizona, USAi
Regional Level Types
La Paz Mining District (Weaver Mining District)Mining District
Dome Rock MountainsMountain Range
La Paz Co.County
ArizonaState
USACountry

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Key
Latitude & Longitude:
33° North , 113° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~101km
Locality type:


A Au-Ag-W-Mn-Cu-Pb-kyanite-Th-REE mining area located in T2-6N, R20 & 21W, G&SRM, on the West side and northern portion of the Dome Rock Mountains. Started in the 1860's.

The area is made up of sedimentary and igneous schists, locally intruded by granite. Larger and more persistent veins generally occur parallel to the schistosity and small gash veins cut across the scistosity.

Mineralization is varied: (1): Gold placer deposits, in gravels of numerous gulches and in terrace gravels bordering the washes, derived from small, lensing, gold-bearing quartz veins and veinlets in Mesozoic and early Tertiary metamorphic and granitic rocks; (2) Spotty gold and silver mineralization with some base metals in quartz fissure veins in Mesozoic metamorphic rock, intruded by Mesozoic or early Tertiary granitic rock; (3) Sporadic tungsten mineralization in contact metamorphic deposits along faults or intrusive contacts and associated with marble beds in Mesozoic metamorphic beds; and, (4) Manganese oxides in iregular bodies along bedding plane fractures in Mesozoic metamorphic rocks.

This district features extensive placer operations in gulches and on terraces from the 1860's, mainly prior to 1900. Several relatively small scattered mining operations for precious and base metals from the late 1800's to about 1960. Tungsten and manganese prospecting and mining were carried on during periods of premium prices. Total estimated placer production would be around 100,000 oz. gold with about 25,000 oz. silver. Mine production of precious and base metals would amount to some 11,200 tons of ore containing about 2,400 oz. gold, 1,000 oz. silver, 8 tons of copper, and 2 tons of lead. Some 5,000 tons of tungsten ore containing about 0.4% WO3 and some 400 long tons of 41-51% Mn ore were also produced.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

23 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp. MRDS database Dep. ID file #10065107, MRDS D #TC40119.
'Albite-Anorthite Series'
Reference: MRDS database Dep. ID #10259110, MRDS ID #TC00084; MAS ID #0040120006.
Andalusite
Formula: Al2(SiO4)O
Description: Occurs as small crystalline masses in granite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 110.
Baryte
Formula: BaSO4
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
Calcite
Formula: CaCO3
Chalcocite
Formula: Cu2S
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: 158 (Table 4); Arizona Bureau of Mines file data.
Chalcopyrite
Formula: CuFeS2
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
'Chlorite Group'
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cinnabar
Formula: HgS
Description: Sparsely distributed in veins.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 175.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fluorite
Formula: CaF2
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
Goethite
Formula: α-Fe3+O(OH)
Reference: MRDS database Dep. ID #10259110, MRDS ID #TC00084; MAS ID #0040120006.
Gold
Formula: Au
Localities: Reported from at least 7 localities in this region.
Hematite
Formula: Fe2O3
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: MRDS database Dep. ID #10259110, MRDS ID #TC00084; MAS ID #0040120006.
Kyanite
Formula: Al2(SiO4)O
Magnetite
Formula: Fe2+Fe3+2O4
Malachite
Formula: Cu2(CO3)(OH)2
Manganite
Formula: Mn3+O(OH)
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: 159 (Table 4); Farnham & Stewart (1958): 82; Arizona Bureau of Mines file data.
'Mica Group'
Reference: Elevatorski, E.A. (1978), Arizona Industrial Minerals, Arizona Department of Mineral Resources, Minerals Report No. 2: 69. MRDS database Dep. ID file #10162240, MAS ID #0040120516.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
'Psilomelane'
Formula: Mn, O
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: 159 (Table 4); Farnham & Stewart (1958): 82; Arizona Bureau of Mines file data.
Pyrite
Formula: FeS2
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
Pyrolusite
Formula: Mn4+O2
Quartz
Formula: SiO2
Quartz var: Amethyst
Formula: SiO2
Reference: MRDS database Dep. ID file #10056413, MRDS ID #TC00084.
Scheelite
Formula: Ca(WO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Cinnabar2.CD.15aHgS
Pyrite2.EB.05aFeS2
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Manganite4.FD.15Mn3+O(OH)
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Andalusite9.AF.10Al2(SiO4)O
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Kyanite9.AF.15Al2(SiO4)O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Chlorite Group'-
'Mica Group'-
'Psilomelane'-Mn, O

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Cinnabar2.8.14.1HgS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Manganite6.1.3.1Mn3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Andalusite52.2.2b.1Al2(SiO4)O
Kyanite52.2.2c.1Al2(SiO4)O
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 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Albite-Anorthite Series'-
'Chlorite Group'-
Kaolinite-Al2(Si2O5)(OH)4
'Mica Group'-
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
'Psilomelane'-Mn, O
Quartz
var: Amethyst
-SiO2

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H ManganiteMn3+O(OH)
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Goethiteα-Fe3+O(OH)
H KaoliniteAl2(Si2O5)(OH)4
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
OOxygen
O MalachiteCu2(CO3)(OH)2
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O ScheeliteCa(WO4)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O PyrolusiteMn4+O2
O CalciteCaCO3
O MagnetiteFe2+Fe23+O4
O PsilomelaneMn, O
O ManganiteMn3+O(OH)
O AndalusiteAl2(SiO4)O
O Quartz (var: Amethyst)SiO2
O BaryteBaSO4
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O KyaniteAl2(SiO4)O
O QuartzSiO2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O KaoliniteAl2(Si2O5)(OH)4
O MuscoviteKAl2(AlSi3O10)(OH)2
FFluorine
F FluoriteCaF2
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al AndalusiteAl2(SiO4)O
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Al KyaniteAl2(SiO4)O
Al KaoliniteAl2(Si2O5)(OH)4
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si AndalusiteAl2(SiO4)O
Si Quartz (var: Amethyst)SiO2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
Si KyaniteAl2(SiO4)O
Si QuartzSiO2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si KaoliniteAl2(Si2O5)(OH)4
Si MuscoviteKAl2(AlSi3O10)(OH)2
SSulfur
S ChalcociteCu2S
S CinnabarHgS
S ChalcopyriteCuFeS2
S PyriteFeS2
S BaryteBaSO4
KPotassium
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca ScheeliteCa(WO4)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca FluoriteCaF2
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
MnManganese
Mn PyrolusiteMn4+O2
Mn PsilomelaneMn, O
Mn ManganiteMn3+O(OH)
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe MagnetiteFe2+Fe23+O4
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
CuCopper
Cu MalachiteCu2(CO3)(OH)2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
BaBarium
Ba BaryteBaSO4
WTungsten
W ScheeliteCa(WO4)
AuGold
Au GoldAu
HgMercury
Hg CinnabarHgS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma County, Arizona, USGS Bull. 451: 78-86.
Jones, E.L., Jr. (1916b) Gold deposits near Quartzsite, Arizona, in Contributions to economic geology, 1915, Part I: Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 620: 45-57.
Wilson, E.D., et al (1934)(revised 1967), Arizona Bureau of Mines Bull. 137: 135-136.
Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 25-29.
Johnson, M.G. (1972), Placer gold deposits of Arizona, USGS Bull. 1355, 103p.: 76-78.
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: 158 (Table 4).
Arizona Bureau of Mines file data.

Localities in this Region

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