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Mineralogical Magazine; February 2008; v. 72; no. 1; p. 37; DOI: 10.1180/minmag.2008.072.1.37
© 2008 Mineralogical Society of Great Britain and Ireland
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Session I: Mineral weathering

Geochemical characteristics of rare earth element movement during incipient alteration of pyroxenes in Guatemalan corestones

A. Donatelle* and M. Velbel

206 Natural Science Building, Michigan State University, East Lansing, MI 48824-1115, USA

* E-mail: donatel4{at}msu.edu

ABSTRACT

Earth scientists currently use changes in major and minor elements as an indication of rock alteration. Work on spheroidal weathering has shown an increase in the rare earth element (REE) whole-rock abundances can accompany minor changes in major elements and highlights the need for new, more sensitive, geochemical techniques of detecting incipient alteration. Augites from the core and rind of a corestone system from the Tecuamburro complex in SE Guatemala are examined to determine their role in the whole-rock REE increases.






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