U.S. Geological Survey

Geochemical Studies of Rare Earth Elements
in the Portuguese Pyrite Belt,
and Geologic and Geochemical Controls
on Gold Distribution

By David J. Grimes, Robert L. Earhart,
Delfim de Carvalho, Vitor Oliveira,
Jose T. Oliveira, and Paulo Castro

U.S. Geological Survey Professional Paper 1596
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For more information about this report contact: David Grimes