Argon-lead isotopic correlation in Mid-Atlantic Ridge basalts

被引：65

作者：

Sarda, P ^{[1
]}

Moreira, M ^{[1
]}

Staudacher, T ^{[1
]}

机构：

[1] Inst Phys Globe, Lab Geochim & Cosmochim, F-75252 Paris 05, France

来源：

SCIENCE | 1999年 / 283卷 / 5402期

关键词：

D O I：

10.1126/science.283.5402.666

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：

Step-heating analyses for Mid-Atlantic Ridge glass samples show that maximum Ar-40/Ar-36 values correlate with Pb-206.207.208/Pb-204. These correlations hold for the whole Atlantic Ocean and therefore are unlikely to result from shallow-level contamination processes. Instead, they are taken as mixing hyperbolae between the degassed-depleted upper mantle and a recycled component characterized by high Pb-206/Pb-204 ratios (19 to 21) and Low Ar-40/Ar-36 ratios (300 to 1000). These relations imply that argon may also be a tracer of mantle recycling.

引用

页码：666 / 668

页数：3

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