Direct dating of sulfides by Rb-Sr: A critical test using the polaris Mississippi Valley-type Zn-Pb deposit

被引：97

作者：

Christensen, JN ^{[1
]}

Halliday, AN ^{[1
]}

Leigh, KE ^{[1
]}

Randell, RN ^{[1
]}

Kesler, SE ^{[1
]}

机构：

[1] COMINCO LTD,EXPLORAT,TORONTO,ON M5H 1T1,CANADA

来源：

GEOCHIMICA ET COSMOCHIMICA ACTA | 1995年 / 59卷 / 24期

关键词：

D O I：

10.1016/0016-7037(95)00345-2

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：

The Rb-Sr dating of sphalerites is a powerful method for directly determining the age of base metal deposits and testing models for large-scale fluid flow. However, the uncertainty over the exact host phases for the trace amounts of Rb and Sr and the causes of variability in Rb/Sr have caused concern over the reliability of the method. Here we show that the Polaris MVT deposit, with a geologically well-constrained age of formation, confirmed by paleomagnetic measurements, and hosted in significantly older sedimentary rocks, yields a consistent Rb-Sr age of 366 +/- 15 Ma, providing the first unequivocal vindication of the reliability of the method.

引用

页码：5191 / 5197

页数：7

共 22 条

[1] ALLEGHENIAN AGE OF THE UPPER MISSISSIPPI VALLEY ZINC LEAD DEPOSIT DETERMINED BY RB-SR DATING OF SPHALERITE [J].