ARCHEAN ROCKS IN ANTARCTICA - 2.5-BILLION-YEAR URANIUM-LEAD AGES OF PEGMATITES IN ENDERBY LAND

被引：56

作者：

GREW, ES ^{[1
]}

MANTON, WI ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT GEOL,DALLAS,TX 75080

来源：

SCIENCE | 1979年 / 206卷 / 4417期

关键词：

D O I：

10.1126/science.206.4417.443

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：

Uranium-lead isotopic data indicate that the granulite-facies Napier complex of Enderby Land, Antarctica, was cut by charnockitic pegmatites 2.5 billion years ago and by pegmatites lacking hypersthene 0.52 billion years ago. The 4-billion-year lead-lead ages (whole rock) reported for the Napier complex are rejected since these leads developed in three stages. Reconstructions of Gondwanaland suggest that the Napier complex may be a continuation of the Archean granulitic terrain of southern India. Copyright © 1979 AAAS.

引用

页码：443 / 445

页数：3

共 30 条

[1]

ATRASHENOK LY, 1967, VOPROSY DATIROVKI DR, P227

[2]

BARRON EJ, 1978, T AM GEOPHY, V59, P436

[3]

BERGER AR, 1973, GEOL RUNDSCH, V62, P345

[4]

CALVO C, 1974, AM MINERAL, V59, P1277

[5]

Crawford A.R., 1969, J GEOL SOC INDIA, V10, P117

[6]

CRAWFORD AR, 1969, SPEC PUBL GEOL SOC A, V2, P283

[7] CO-EXISTING SAPPHIRINE AND QUARTZ IN GRANULITE FROM ENDERBY LAND ANTARCTICA [J].

DALLWITZ, WB .

NATURE, 1968, 219 (5153) :476-&

[8] BEHAVIOR OF LEAD ISOTOPES DURING GRANULITE FACIES METAMORPHISM [J].

GRAY, CM ;

OVERSBY, VM .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1972, 36 (09) :939-&

[9]

GREW ES, 1978, ANTARCT J US, V13, P2

[10]

GREW ES, 1978, GEOL SOC AM BULL, V89, P801, DOI 10.1130/0016-7606(1978)89<801:PBAMSE>2.0.CO

← 1 2 3 →