Skip to Main Content
Book Chapter

Distribution of Trace Elements in Igneous Rocks of Peruvian Andes—Metallogenic Implications1

By
Etienne J. M. Audebaud
Etienne J. M. Audebaud
2
Laboratoire Associe au C.N.R.S., Institute Dolomieu, Grenoble, France.
Search for other works by this author on:
Jean Amosse
Jean Amosse
2
Laboratoire Associe au C.N.R.S., Institute Dolomieu, Grenoble, France.
Search for other works by this author on:
Published:
January 01, 1981

Abstract

Although numerous papers have been written on the geologic and metallogenic features of the Andes, a satisfactory hypothesis in regard to distribution of mineralization has not been presented. Previous studies of sedimentary rocks, erosion, and structure have shown only that they had local influence. Geochemical studies of igneous rocks for 11 trace elements were plotted with respect to the distance of the rocks from the Peru-Chile trench. Analyses of the geochemical contents permitted the division of the Andean orogene into two main provinces. The western province is characterized by decreasing copper content and increasing nickel, cobalt, and nickel/cobalt ratio from west to east. The eastern province is defined by high contents of lithium, rubidium, lead, and zinc.

Three structural divisions were noted. On the west, the Precambrian shield was weakly deformed during the Hercynian orogeny. The Hercynian belt on the east has a highly folded series of sandstones and shales. Between these two zones, the Altiplano is a highly mobile joint between the two mechanically different domains.

You do not currently have access to this article.

Figures & Tables

Contents

AAPG Studies in Geology

Energy Resources of the Pacific Region

Michel T. Halbouty
Michel T. Halbouty
Search for other works by this author on:
American Association of Petroleum Geologists
Volume
12
ISBN electronic:
9781629811802
Publication date:
January 01, 1981

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal