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,
U.S. Geological Survey Professional Paper 1596
Delfim de Carvalho, Vitor Oliveira,
Jose T. Oliveira, and Paulo Castro
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For more information about this report contact: David Grimes