Description
John Spencer Or Mexicans Who Worked For Him.
Commodities
PrimarySilver, Lead, Gold, Zinc
TertiaryManganese
Commodity typeM
Deposit
Model72: Polymetallic replacement
Deposit sizeM
WorkingsUnderground
Orebody formBLANKET, PINCH AND SWELL
Ore controlReplacement Of Favorable Beds Adjacent To Normal Faults.
Materials
Ore mineralsAnglesite, Argentite, Cerargyrite, Chalcopyrite, Chrysocolla, Covellite, Descloizite, Endlichite, Galena, Hemimorphite, Iron, Plumbojarosite, Pyrite, Sphalerite
GangueCalcite, Dolomite, Quartz
Geology
Host rockLimestone · Mina Grande Formation;Presidio
Associated rockPlutonic Rock
StructureDoming Of Host Carbonates.
AlterationDolomitization And Silicification Of Limestone; Kaolinite-Calcite-Pyrite In Tertiary Dike Rocks
Economic & production
Development statusPast Producer
Production years1883-1930; 1934-1942.
First production1883
Last production1942
Discovery year1880
Identification
Deposit ID10085715
MRDS IDW701346
Alternate namesShafter
RegionNA
Data scoreA
Coordinates29.813, -104.32938
References
PRICE, J. G., HENRY, C. D., AND STANDEN, A. R., 1983, ANNOTATED BIBLIOGRAPHY OF MINERAL DEPOSITS IN TRANS-PECOS TEXAS: BUREAU OF ECONOMIC GEOLOGY (TEXAS), MINERAL RESOURCE CIRCULAR NO. 73, 108 P.ROSS, CLYDE P., 1943, GEOLOGY AND ORE DEPOSITS OF THE SHAFTER MINING DISTRICT, PRESIDIO COUNTY, TEXAS: USGS BULL. 928-B, 125P.TWO MONTHS OF FIELD INVESTIGATIONS IN 1934 BY CLYDE P. ROSS, W.E. CARTWRIGHT, AND C.H. COLDWELL UNDER ALLOTMENT FROM THE PUBLIC WORKS ADMINISTRATIONCIMRIPRICE AND OTHERS, 1983; MINES HANDBOOKUSGS OFR 92-002, P. 18.