Platinum, palladium, and rhodium in volcanic and plutonic rocks from the Gravina-Nutzotin belt, Alaska

Journal of Research of the U.S. Geological Survey
By: , and 

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Abstract

The Gravina-Nutzotin belt of Middle (?) Jurassic to middle Cretaceous sedimentary and volcanic rocks in south and southeastern Alaska includes concentrically zoned ultramafic complexes known to contain platinum-group metals. Previous isotopic, petrologic, and geologic studies suggested a close relation in time and space between the volcanic rocks and the ultramafic complexes. Interpretation of 40 analyses for platinum, palladium, and rhodium in volcanic and plutonic rocks of the belt indicates a strong geochemical correlation between the two groups of rocks and is in support of their being cogenetic either from directly connected magma chambers and flows or indirectly by selective concentration processes from similar mantle material.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Platinum, palladium, and rhodium in volcanic and plutonic rocks from the Gravina-Nutzotin belt, Alaska
Series title Journal of Research of the U.S. Geological Survey
Volume 5
Issue 5
Year Published 1977
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 8 p.
First page 629
Last page 636
Country United States
State Alaska
Online Only (Y/N) N
Additional Online Files (Y/N) N
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