Strontium and argon isotopes in naturally weathered biotites, muscovites and feldspars
Strontium and argon isotopes in naturally weathered biotites, muscovites and feldspars
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DOI：
10.1016/0009-2541(80)90094-7
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发表时间：
1980
期刊：
影响因子：
3.9
通讯作者：
N. Clauer
中科院分区：
文献类型：
--
作者：
N. Clauer
对深裂岩和喷发岩中逐渐风化的黑云母、白云母和长石的RbSr和KAr同位素研究表明，它们的大陆风化是一个受环境条件控制的复杂现象。在黑云母风化过程中，KAr对常常模仿RbSr对。放射性成因的Sr和Ar同位素被系统地浸出，但元素Rb、K、Sr和Ar的行为取决于环境。相比之下，白云母的Sr和Ar平衡即使在非常强烈的风化过程中也能保持。在长石混合物中，常见的Sr似乎优先被放射性成因同位素浸出，而KAr平衡保持不变。
A RbSr and KAr isotopical study on progressively weathered biotites, muscovites and feldspars from plutonic and eruptive rocks shows that their continental weathering is a complex phenomenon controlled by environmental conditions.During weathering of biotites, the KAr couple often mimics the RbSr couple. The radiogenic Sr and Ar isotopes are systematically leached out, but the behaviour of the elemental Rb, K, Sr and Ar depends upon the environment. In contrast, the Sr and Ar balances of muscovites are maintained, even during very intensive weathering. In mixtures of feldspars, the common Sr seems to be leached out preferentially to the radiogenic isotope, while the KAr balance is maintained.