EarthRef.org Reference Database (ERR) -- Rehkamper et al. 1997

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Rehkamper et al. 1997

Rehkamper, M., Halliday, A.N., Barfod, D. and Fitton, J.G. (1997). Platinum-group element abundance patterns in different mantle environments. Science 278(5343): 1,595-1,598.

Mantle-derived xenoliths from the Cameroon Line and northern Tanzania display differences in their platinum-group element (PGE) abundance patterns. The Cameroon Line Iherzolites have uniform PGE patterns indicating a homogeneous upper mantle over several hundreds of kilometers, with approximately chondritic PGE ratios. The PGE patterns of the Tanzanian peridotites are similar to the PGE systematics of ultramafic rocks from ophiolites. The differences can be explained if the northern Tanzanian lithosphere developed in a fluid-rich suprasubduction zone environment, whereas the Cameroon Line lithosphere only experienced melt extraction from anhydrous peridotites.

BACKGROUND DATA FILES

	Abstract

	Table 1

Keywords
siderophile elements, group minerals, ophiolitic complexes, outokumpu ophiolite, iridium, palladium, chromite, gold, geochemistry, peridotites

Journal
Science
http://www.sciencemag.org/

Publisher
American Association for the Advancement of Science
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