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

被引：168

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
ALLEGRE, CJ
[J]. TECTONOPHYSICS, 1982, 81 (3-4) : 109 - 132
[2] CHEMICAL ASPECTS OF THE FORMATION OF THE CORE
ALLEGRE, CJ
DUPRE, B
BREVART, O
[J]. 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
ANTHONY, EY
SEGALSTAD, TV
NEUMANN, ER
[J]. 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
CHASE, CG
[J]. EARTH AND PLANETARY SCIENCE LETTERS, 1981, 52 (02) : 277 - 284
[7] THE LEAD, NEODYMIUM AND STRONTIUM ISOTOPIC STRUCTURE OF OCEAN RIDGE BASALTS
COHEN, RS
ONIONS, RK
[J]. 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] 2
[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
DUNLOP, HM
FITTON, JG
[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY, 1979, 71 (02) : 125 - 131

← 1 2 3 4 5 6 →