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Titolo:
PLATINUM-GROUP ELEMENT ABUNDANCE PATTERNS IN DIFFERENT MANTLE ENVIRONMENTS
Autore:
REHKAMPER M; HALLIDAY AN; BARFOD D; FITTON JG;
Indirizzi:
UNIV MICHIGAN,DEPT GEOL SCI,1006 CC LITTLE BLDG ANN ARBOR MI 48109 UNIV EDINBURGH,DEPT GEOL & GEOPHYS EDINBURGH EH9 3JW MIDLOTHIAN SCOTLAND
Titolo Testata:
Science
fascicolo: 5343, volume: 278, anno: 1997,
pagine: 1595 - 1598
SICI:
0036-8075(1997)278:5343<1595:PEAPID>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIDEROPHILE ELEMENTS; GROUP MINERALS; OPHIOLITIC COMPLEXES; OUTOKUMPU OPHIOLITE; IRIDIUM; PALLADIUM; CHROMITE; GOLD; GEOCHEMISTRY; PERIDOTITES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
62
Recensione:
Indirizzi per estratti:
Citazione:
M. Rehkamper et al., "PLATINUM-GROUP ELEMENT ABUNDANCE PATTERNS IN DIFFERENT MANTLE ENVIRONMENTS", Science, 278(5343), 1997, pp. 1595-1598

Abstract

Mantle-derived xenoliths from the Cameroon Line and northern Tanzaniadisplay 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 meltextraction from anhydrous peridotites.

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Documento generato il 27/11/20 alle ore 03:45:43