Mineral Resources of Colombia (other than Petroleum)
By QUENTIN D. SINGEWALD GEOLOGIC INVESTIGATIONS IN THE AMERICAN REPUBLICS, 1949
GEOLOGICAL SURVEY BULLETIN 964-B
Prepared in cooperation with the Foreign Economic Administration
UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON i 1950 UNITED STATES DEPARTMENT OF THE INTERIOR
Oscar L. Chapman, Secretary
GEOLOGICAL SURVEY
W. E. Wrather, Director
For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. - Price $1.00. (paper cover) CORRECTION
In the table of contents of Bulletin 964-B, page iv, credit for the section on gold was inadvertently given to Charles Mentzel. As stated on page 120, this section was reproduced, with slight modification, from a summary report written by J. K. Cathcart for FEA. CONTENTS
Page Abstract-_____-_------__--______53 Introduction... __.____-______--- ______56 Scope of report ______56 Status of mining and prospecting in Colombia______57 Maps.______-__-______---___-____-_-__---_- 58 Personnel and acknowledgments ______60 Geography and geology______61 Topographic features.______61 Economic geography___-______62 General geology: Andean province______-___--_- 63 Pre-Cretaceous metamorphic and plutonic igneous rocks _____ 64 Cordillera Oriental______--_-___---- _____ 65 Cordillera Central. ______66- Other ranges______-______-___------_--_ 68 Paleozoic sedimentary rocks______68 Mesozoic sedimentary rocks. ______69 Cordillera Occidental subprovince______69 Cordillera Oriental subprovince ______71 Tertiary sedimentary rocks______75 Marine strata______75 Nonmarine strata______-__- _ 77 Post-Jurassic igneous rocks___-______79 Colombian mining law. ______80 Generalstatement______80 Title by "adjudicaci6n"______81 "Contracts" (concessions)______82 Comment______83 Antimony.______84 Caldas______...___..______._._____ 85 La Gloria mine______.__-__-____ 85 La Cristalina mine______._ 85 Jesus Gomez' mine______-_____--_---_-____ 85 La Palma prospect_-______86 Other localities______86 Cauca______86 Tolima______86 El Diamante antimony concession______86 El Porvenir prospect______87 Other localities______87 Asbestos______87 Barite______88 Bauxite. ______.______90 Cement. ______90 Antioquia.______90 Atldntieo______91 Cundinamarca______91 Santander______92 Valle del Cauca______92 Chromite______92 Clay___.______93 zn IV CONTENTS