TRACE-ELEMENT FRACTIONATION IN PLUMES AND THE ORIGIN OF HIMU MANTLE BENEATH THE CAMEROON LINE

被引：171

作者：

HALLIDAY, AN ^{[1
]}

DAVIDSON, JP ^{[1
]}

HOLDEN, P ^{[1
]}

DEWOLF, C ^{[1
]}

LEE, DC ^{[1
]}

FITTON, JG ^{[1
]}

机构：

[1] UNIV EDINBURGH,GRANT INST GEOL,EDINBURGH EH9 3JW,MIDLOTHIAN,SCOTLAND

来源：

NATURE | 1990年 / 347卷 / 6293期

关键词：

D O I：

10.1038/347523a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The lavas of the Cameroon line display a lead isotope anomaly at the continent/ocean boundary which can be attributed to a fossil mantle plume, the diminishing lateral effects of which can be recognized as far as 400km to either side. The high 206Pb/204Pb ratio - characteristic of the mantle endmember known as 'HIMU' - seems to arise from U/Pb fractionation accompanying melt migration following emplacement of the plume in the upper mantle 125 Myr ago. © 1990 Nature Publishing Group.

引用

页码：523 / 528

页数：6

共 57 条

[1] CHEMICAL GEODYNAMICS [J].

ALLEGRE, CJ .

TECTONOPHYSICS, 1982, 81 (3-4) :109-132

[2] CHEMICAL ASPECTS OF THE FORMATION OF THE CORE [J].

ALLEGRE, CJ ;

DUPRE, B ;

BREVART, O .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1982, 306 (1492) :49-59

[3]

[Anonymous], 1987, SPECIAL PUBLICATION

[4] AN UNUSUAL MANTLE SOURCE REGION FOR NEPHELINITES FROM THE OSLO RIFT, NORWAY [J].

ANTHONY, EY ;

SEGALSTAD, TV ;

NEUMANN, ER .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (05) :1067-1076

[5]

CANTAGREL JM, 1978, C R SOMM SOC GEOL FR, V6, P300

[6] OCEANIC ISLAND PB - 2-STAGE HISTORIES AND MANTLE EVOLUTION [J].

CHASE, CG .

EARTH AND PLANETARY SCIENCE LETTERS, 1981, 52 (02) :277-284

[7] THE LEAD, NEODYMIUM AND STRONTIUM ISOTOPIC STRUCTURE OF OCEAN RIDGE BASALTS [J].

COHEN, RS ;

ONIONS, RK .

JOURNAL OF PETROLOGY, 1982, 23 (03) :299-324

[8]

DALRYMPLE GB, 1981, GEOL SOC AM BULL, V92, P315, DOI 10.1130/0016-7606(1981)92<315:PAKAOD>2.0.CO

[9]

[10] K-AR AND SR-ISOTOPIC STUDY OF THE VOLCANIC-ROCKS OF THE ISLAND OF PRINCIPE, WEST-AFRICA - EVIDENCE FOR MANTLE HETEROGENEITY BENEATH THE GULF OF GUINEA [J].

DUNLOP, HM ;

FITTON, JG .

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, 1979, 71 (02) :125-131

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