Sm-Nd age of Kambalda and Kanowna greenstones and heterogeneity in the Archaean mantle

被引：109

作者：

McCulloch, M. T. ^{[1
]}

Compston, W. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2600, Australia

来源：

NATURE | 1981年 / 294卷 / 5839期

关键词：

D O I：

10.1038/294322a0

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：

A precise Sm-Nd age of 2,790 +/- 30 Myr and an initial ratio corresponding to epsilon(Nd) = +3.4 +/- 0.6 has been determinedfor the Kambalda sequence from the eastern Yilgarn Block of Western Australia. The high initial Nd-143/Nd-144 implies a long-lived light rare-earth element-depleted (high Sm/Nd) source for the Kambalda volcahics and therefore provides definitive evidence for ancient heterogeneities in the Archaean mantle.

引用

页码：322 / 327

页数：6

共 35 条

[1]

ARRIENS PA, 1971, SPEC PUBL GEOL SOC A, V3, P11

[2] STRUCTURAL HISTORY AND METAMORPHIC MODIFICATION OF ARCHEAN VOLCANIC-TYPE NICKEL DEPOSITS, YILGARN BLOCK, WESTERN AUSTRALIA [J].