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LEAD, TIN, AND PRECIOUS-METAL MINERALIZATION IN THE U. S. VIRGIN ISLANDS.

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Abstract

This regional geochemical study of the U. S. Virgin Islands demonstrates the presence of a widespread base-metal (primarily Pb, Sn, Cu) and precious-metal (primarily Ag) mineralization on all three of the islands. The overall association: Au, Ag, Te, Sn, Pb, Cu, Zn, Sb, Bi, Mo, As and Ba shows a great similarity to that of the Bolivian silver-tin district. The single divergence from the Bolivian association is tungsten, which is totally lacking in the U. S. Virgin Islands. The delineated geochemical patterns transect all exposed rock types on the islands, including the Kingshill Marl of late Miocene age, on St. Croix. Some relationship between the geochemical patterns and the major mapped faults can be seen - especially on St. Croix. K-Ar age dating of rocks from St. Thomas and St. John indicates that they are of Tertiary rather than Cretaceous age. This and the apparent contemporaneity of the mineralization with the St. Croix graben infilling indicate a very late Miocene age for the mineralization.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
LEAD, TIN, AND PRECIOUS-METAL MINERALIZATION IN THE U. S. VIRGIN ISLANDS.
Year Published:
1987
Language:
English
Publisher:
Soc of Mining Engineers of AIME
Publisher location:
Littleton, CO, USA
Larger Work Title:
Preprint - Society of Mining Engineers of AIME
Number of Pages:
24
Conference Title:
Soc of Mining Engineers, Preprints for Presentation at the SME Annual Meeting.
Conference Location:
Denver, CO, USA