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.
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页码：322 / 327
页数：6
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