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Trigo Mountains Mining District (Cibola Mining District), La Paz County, Arizona, USAi
Regional Level Types
Trigo Mountains Mining District (Cibola Mining District)Mining District
La Paz CountyCounty
ArizonaState
USACountry

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Latitude & Longitude:
33° North , 113° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~101km
Mindat Locality ID:
33827
Long-form identifier:
mindat:1:2:33827:0
GUID (UUID V4):
d524136d-56ce-4b4b-9ee5-f29cccc9bb5e


A Mn-Au-Ag mining district located in T1-3S, R23-27W, in the northern and central Trigo Mountains.

Mineralization is varied: (1): Manganese oxides in lenticular shoots and bodies within fault zone breccias in Tertiary volcanics overlying Mesozoic schists; (2): Spotty gold in quartz-limonite fissure veins cutting Mesozoic schist, intruded by narrow granitic-porphyry dikes; and, (3): Gold placers deposits in washes below the area of the gold veins.

Original operations were on small gold veins and placers in the 1890's but manganese deposits received little attention until the 1950's when buying stations were established for low-grade material. Only about 52 tons of mined gold ore have been produced accounting for not more than some 62 oz. of gold and 10 oz. of silver. Placer operations may have produced some 323 oz. of gold with minor silver. The total production of manganese ore would be some 7,000 long tons of 40% or more Mn and 24,000 long tons of 20-30% Mn.

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:

β“˜ Baryte
Formula: BaSO4
β“˜ Calcite
Formula: CaCO3
Localities: Reported from at least 9 localities in this region.
β“˜ Calcite var. Iron-bearing Calcite
Formula: (Ca,Fe)CO3
β“˜ Gold
Formula: Au
Description: Placer gold derived from small gold-quartz veins in Mesozoic schist.
β“˜ Hematite
Formula: Fe2O3
β“˜ 'Limonite'
β“˜ Manganite
Formula: Mn3+O(OH)
β“˜ 'Psilomelane'
Localities: Reported from at least 8 localities in this region.
β“˜ Pyrite
Formula: FeS2
Description: Crystals and bunches in cavities and fracture fillings.
β“˜ Pyrolusite
Formula: Mn4+O2
Localities: Reported from at least 10 localities in this region.
β“˜ Quartz
Formula: SiO2
Description: Banded.
β“˜ Quartz var. Milky Quartz
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
β“˜Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Hematite4.CB.05Fe2O3
β“˜Quartz4.DA.05SiO2
β“˜var. Milky Quartz4.DA.05SiO2
β“˜Pyrolusite4.DB.05Mn4+O2
β“˜Manganite4.FD.15Mn3+O(OH)
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜var. Iron-bearing Calcite5.AB.05(Ca,Fe)CO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Baryte7.AD.35BaSO4
Unclassified
β“˜'Limonite'-
β“˜'Psilomelane'-

Localities in this Region

Other Regions, Features and Areas containing this locality

North America
North America PlateTectonic Plate

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.

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