Description
Evans (In Bolivia)
Commodities
PrimaryIron
TertiaryManganese
Commodity typeM
Deposit
Model241: Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)
Deposit sizeS
Orebody formBEDDED
Ore controlIce Shelf Facies (Fe Oxides). Off-Shelf Slope Facies (Mn-Oxides)
Materials
Ore mineralsGoethite, Hausmannite, Hematite
Geology
Host rockSiltstone,Volcanic Breccia (Agglomerate) · Santa Cruz Formation (Jacadigo Group)
StructureReg.Struct: Gentle Ne-Sw Folding, With Ne And Nw Faulting, Synclinal Erosional Remnants
Tectonic settingWest Margin Of Brazilian Shield. Narrow, Fjord-Like Basin
AlterationLow-Grade Metamorphism Altered Cryptomelane To Hausmannite; Weathered To Canga.
Economic & production
Development statusPast Producer
Production years1971-1972
First production1971
Last production1972
Discovery year1894
Identification
Deposit ID10068814
MRDS IDW002072
Alternate namesSerrania De Mutun, Serrania De San Juan, Morro De Jacadigo Brazil, Serra De Jacadigo, Cerro Mutun, Fortin Mutun
RegionSA
Data scoreA
Coordinates-19.21425, -57.89926
References
AHLFELD F., AND SCHNEIDER-SCHERBINA, 1964, LOS YACIMIENTOS MINERALES Y DE HIDROCARBUROS DE BOLIVIA: DNG, BOL. 5, P. 43-49DORR, J.V.N. II, 1945, U.S.G.S. BULL. 946A.ALMEIDA, F.F.M., 1945, GEOL DE SW MATOGROSSENSE, DNPM BULL. 116, BRAZILGERMAN GEOL. COMMISSION REPORT, 1960-1965, BOL. GEOLOGICAL SURVEYWEISS, M.P. AND SWEET, W.C., 1959, STRATIGRAPHY AND STRUCTURE OF THE MUTUN MOUNTAINS, DEPARTMENT OF SANTA CRUZ, BOLIVIA: INTERNATIONAL GEOLOGICAL CONGRESS, 20TH (MEXICO), SECTION 13, P. 399-434.O'CONNOR, E.A., 1985, TRANSACTIONS IMM, V. 94, P. A178-A179.URBAN, H, AND STRIBRNY, B., 1986, THE GEOLOGY AND GENESIS OF THE IRON AND MANGANESE DEPOSITS OF THE URUCUM DISTRICT, MATO GROSSO DO SUL, BRAZIL: ZENTRALBLATT GEOL. PALAONT, TEIL I, 1985, HEFT 9/10, P. 1515-1527.1945 GEOLMAP DORR, J.V.N. II, USGS BULL. 946A FOR MORRO DO URUCUM, CORUMBA, BRAZILCIMRIUSBM MINERALS YEARBOOK 1971, P. 147; 1972, P. 151; 1973, P. 157, AND SUBSEQUENT YEARS.O'CONNOR (1985) P. A179; USBM YEARBOOK 1967, P. 132.