The metallogenic evolution of the Greater Antilles

Authors

  • C.E. NELSON Consulting Geologist. 2360 23rd St., Boulder, Colorado 80304 USA.
  • J.A. PROENZA FERNANDEZ Departament de Cristal.lografia, Mineralogia i Dipòsits Minerals, Facultat de Geologia, Universitat de Barcelona (UB). Martí i Franquès, s/n, 08028 Barcelona, Spain.
  • J.F. LEWIS Department of Earth and Environmental Sciences, The George Washington University. Washington, D.C. 20052, U.S.A.
  • J. LÓPEZ KRAMER Departamento de Geología Ambiental, Geofísica y Riesgos. Instituto de Geofísica y Astronomía AMA-CITMACalle 212/29 y 31, No 2906. La Lisa, Rpto La Coronela, Cuba.

Keywords:

Caribbean, Metallogeny, Mineral deposit, Tectonic evolution.

Abstract

The Greater Antilles host some of the world’s most important deposits of bauxite and lateritic nickel as well as significant resources of gold and silver, copper, zinc, manganese, cobalt and chromium. Beginning in Jurassic time, sedimentary exhalative base metal deposits accumulated in marine sedimentary rift basins as North and South America drifted apart. With the onset of intraoceanic subduction during the Early Cretaceous, a primitive (tholeiitic) island arc formed above a southwesterly-dipping subduction zone. Podiform chromite deposits formed in the mantle portion of the supra-subduction zone, directly above subducted Proto-Caribbean oceanic lithosphere. Within the nascent island arc, bimodal-mafic volcanogenic massive sulfide deposits formed in a fore-arc setting; mafic volcanogenic massive sulfide deposits formed later in mature back-arc basins. The Pueblo Viejo gold district, with five million ounces in production and twenty million ounces in mineable reserves, formed at 108-112Ma, in an apical rift or back-arc setting. By Late Cretaceous time, calc-alkaline volcanism was well established along the entire length of the Greater Antilles. Volcanogenic massive sulfide deposits including shallow submarine deposits characteristic of the primitive island arc gave way to porphyry copper and epithermal precious metal deposits typical of the mature island arc. Oblique collision of the Greater Antilles with North America began in the Late Cretaceous in Cuba and migrated eastward. Orogenic gold and tungsten deposits that formed during the collision event are preserved in ophiolites and in metamorphic core complexes. Since the Eocene, regional tectonism has been dominated by strike-slip motion as the North American continent moved westward relative to the Caribbean Plate. Large nickel-cobalt laterite deposits were formed when serpentinites were exposed to weathering and erosion during the mid-Tertiary. Bauxite deposits were derived from the weathering of volcanic ash within a carbonate platform of Eocene to Miocene age

Downloads

Published

2011-11-30

How to Cite

1.
NELSON C, PROENZA FERNANDEZ J, LEWIS J, LÓPEZ KRAMER J. The metallogenic evolution of the Greater Antilles. GeA [Internet]. 2011Nov.30 [cited 2021Oct.22];9(3-4):229-64. Available from: https://revistes.ub.edu/index.php/GEOACTA/article/view/105.000001741

Most read articles by the same author(s)