Description
William Braden
Commodities
PrimaryCopper, Molybdenum
Commodity typeM
Deposit
Deposit sizeN
Orebody formOVAL, HALF MOON
Ore controlMonocline (See Local Structures) Which May Be A Surface Reflection Of A Major Fault At Depth
Materials
Ore mineralsBornite, Brochantite, Chalcanthite, Chalcocite, Chalcopyrite, Chrysocolla, Tetrahedrite
GangueAnhydrite, Jarosite, Limonite, Magnetite, Tourmaline
Other materialsMolybdenite
Geology
Host rockTonalite,Tuff
Associated rockTonalite · Los Pelambres Tonalite Stock;Continental Lutites, Arenites And Andesitic Volcanics; Colimapu Formation;Andesitilavas, Tuffs And Agglomerates; Rio Damas F
StructureNorth Trending Folds, Faults And Plutonic Masses, Monocline, Strikes N-Nw., Dips From 20 To 80 To 20 Deg. West, And Is A Subsidiary Flexure On The Western Flank Of A N-S Trending Anticlinorium
Tectonic settingAndean Cordillera And Batholith
AlterationA Core Of Potassium Silicate Alteration Is Confined To The Stock And Roof Pendants. Surrounded By Annular Zone Of Feldspar-Destructive Alteration, Consisting Of Sericitization, Argillization, And Silicification, Averaging 500 M In Width. Grades Out To Propylitic Alteration. Potassic, Phyllic. (Total Area Covered Is 6km X 2.5km)
Economic & production
Development statusProspect
Discovery year1914
Identification
Deposit ID10068477
MRDS IDW001545
RegionSA
Data scoreC
Coordinates-31.70246, -70.49452
References
RUIZ, F., CARLOS, 1965, GEOLOGIA Y YACIMIENTOS METALIFEROS DE CHILE: INST. INV. GEOL. CHILE, TABLE 1 (SPANISH)SILLETOE, R. H., 1973, GEOLOGY OF THE LOS PELAMBRES PORPHYRY COPPER DEPOSIT, CHILE: ECON. GEOLOGY, V. 68, NO. 1, P. 1-10GRIFFIS, A. T., 1972, EXPLORATION: MINING ENG., V. 8, NO. 7, P. 78-84.UNITED NATIONS DEVELOPMENT PROGRAMME, 1967, MINERAL RESOURCES OF THE PROVINCE OF COQUIMBO, CHILE: NEW YORK, UNITED NATIONS, P.32-34RUIZ, C. AND PEEBLES, F., 1988, YACIMIENTOS METALIFEROS DE CHILE: SANTIAGO, 334 P.SERPLAC, 1981, INVENTARIO DE LOS RECURSOS MINERALES DE LA IV REGION: SANTIAGO (28 VOLS.)EANMI, 1971, #4894.FLORES, HECTOR, 1960, INFORME SOBRE LA MINA DE COBRE LOS PELAMBRES: DEPT. ILLAPEL, PRIVATE UNPUB. INF. (SPANISH).1960 COMPILE INSTITUTO INVESTIGACIONES GEOLOGICAS CHILCIMRISILLITOE, R. H. 1973, P-5, REF. 2; RUIZ Y PEEBLES, 1988.