Commodities
PrimaryTungsten
SecondaryManganese
Commodity typeM
Deposit
Model156: Epithermal Mn
Deposit sizeM
Orebody formBLANKETS AND VEINS
Ore controlSedimentary Beds; Underlying Vein System; Adjacent N25e Fault
Materials
Ore mineralsHollandite, Psilomelane, Pyrolusite
GangueGoethite, Iron, Jarosite, Lepidocrocite
Geology
Host rockGravel,Limestone
AlterationSilicification, Argillization And Pyritization Of Underlying Rocks
Economic & production
Development statusPast Producer
First production1893
Discovery year1866
Identification
Deposit ID10043948
MRDS IDM231257
Alternate namesIron Mask Group, Rare Metals Corp. Mines, NBMG Sample Site 2906
RegionNA
Data scoreB
Coordinates40.94322, -117.42902
References
VANDERBURG, W.O., 1938, RECONNAISSANCE OF MINING DISTRICTS IN HUMBOLDT CO., NEV; U.S.B.M. INF. CIRC. 6995PENROSE, R.A.F, JR, 1893, A PLEISTOCENE MANGANESE DEPOSIT NEAR GOLCONDA, NEVADA: JOUR. GEOL., VOL. I, P. 275-282KERR, P.F., 1940, TUNGSTEN-BEARING MANGANESE DEPOSIT AT GOLCONDA, NEVADA: G.S.A. BULL. VOL. 51, P. 1359-1390RANSOME; F.L., & BURCHARD, E.F., 1920, CONTRIBUTIONS TO ECON. GEOL., PT. 1: U.S.G.S. BULL. 710WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS OF HUMBOLDT CO., NEV; NEV. BUREAU OF MINES BULL 59.GARSIDE, L. J., 1984, FIELD EXAMINATION 30 SEP 84, AND SAMPLE ANALYSIS.S. E. G. GUIDEBOOK, 1980, UNPUB.SNYDER, W. S., 1978, MANGANESE DEPOSITED BY SUBMARINE HOT SPRINGS IN CHERT-GREENSTONE COMPLEXES, WESTERN U. S.: GE-OLOGY, V. 6, P. 741-744.WILLDEN, R., 1964 NBM BULL STAGER, H.K. (IN PREP JAN. 1984)