Carroll Ann Hodges, Dennis P. Cox, Donald A. Singer, James E. Case, Byron R
UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY U.S. GEOLOGICAL SURVEY-INGEOMINAS MINERAL RESOURCE ASSESSMENT OF COLOMBIA By Carroll Ann Hodges, Dennis P. Cox, Donald A. Singer, James E. Case, Byron R. Berger, and John P. Albers U.S. Geological Survey and Francisco Zambrano-Ortiz, Fernando Etayo-Serna, Dario Barrero Lozano, Hernando Lozano Quiroga, Armando Espinosa Baquero, Humberto Gonzalez Iregui, Abigail Orrego Lopez, Alfonso Arias Tauta, Carlos Cedeno Ochoa, Oscar Pulido Ulloa, Alvaro Murillo Rodriquez, Manuel Jose Diaz, Hermann Duque-Caro, Rodrigo Vargas Higuera, Alberto Nunez Tello, Jairo Alvarez Agudelo, Clemente Ropain Ulloa, Joaquin Buenaventura Arango, Hernando Mendoza Forero, Gloria Rodriquez Sierra, and Luis Jaramillo Cortes Institute Nacional de Investigaciones Geologico-Mineras Open-File Report 84-345 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. Menlo Park, California 1984 Contents Summary 1 Introduction 2 Geologic framework of Colombia 5 Selected deposit types (classification number in Appendices A and B) 48 Podiform chromite (1.1) 7 Porphyry copper molybdenum-rich; gold-rich (2.1, 2.2) 9 Molybdenum porphyry climax type; low fluorine type (2.3, 2.4) 12 Copper skarn (2.6) 14 Lead-zinc skarn (2.7) 14 Massive sulfide, Cyprus type (3.1) 16 Massive sulfide in felsic and intermediate rocks (3.2) 18 Redbed-greenbed copper (4.1) 20 Volcanic native copper (4.2) 22 Sandstone (sedimentary) uranium (4.4) 24 Sediment-hosted submarine exhalative zinc-lead (4.5) 26 Sandstone-hosted lead-zinc deposits (4.8) 28 Epithermal gold, quartz-adularia type (5.4) 30 Hot springs gold-silver deposits (5.6) 32 Emerald veins (5.10) 34 Volcanic-hosted massive replacement (5.15) 36 Sedimentary manganese (6.5) 38 Bauxite (7.1) 41 Nickel laterite (7.2) 43 Contents (Supplement) Page References 44 Table 1.
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