THE THEORETICAL EFFECT OF METASOMATISM ON SM-ND ISOTOPIC SYSTEMS

被引：43

作者：

ROSING, MT

机构：

[1] Geological Museum, DK-1350 København K

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1990年 / 54卷 / 05期

关键词：

D O I：

10.1016/0016-7037(90)90158-H

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

If Sm and Nd are mobilized during fluid-rock interaction, fractionation of the ratio between Sm and Nd in geological units may take place. The fractionation can be characterized by a fractionation factor F, which can attain any value between DSm/DNd and 1 /(DSm/DNd) depending on the fluid/rock ratio during REE transfer. If such fractionations are not recognized this will induce errors in Sm-Nd isotopic interpretations of age and provenance of the affected geological units. The apparent ages and ε{lunate}Nd values are functions of the true values, F, and the time lapse between petrogenesis and secondary disturbance. The functional relationships can be closely approximated by direct proportionalities. © 1990.

引用

页码：1337 / 1341

页数：5

共 13 条

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