K-AR CHRONOLOGY AND SULFUR AND STRONTIUM ISOTOPE RATIOS AT QUESTA-MINE, NEW-MEXICO

被引：34

作者：

LAUGHLIN, AW

REHRIG, WA

MAUGER, RL

机构：

[1] Department of Geology, University of New Mexico, Albuquerque, NM

[2] Department of Geochronology and Geology, University of Arizona, Tucson, AZ

[3] Department of Geology, University of Utah, Salt Lake City, UT

来源：

ECONOMIC GEOLOGY | 1969年 / 64卷 / 08期

关键词：

D O I：

10.2113/gsecongeo.64.8.903

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：

K-Ar age determinations on samples from the Questa Mine, New Mexico indicate that magrnatism and molybdenite mineralization are indistinguishable within an experimental error of 0.8 m.y. These ages of 22.3-23.5 m.y. fall in the mid-Tertiary pulse of magrnatism recognized in the southwestern United States and agree with dates reported on other molybdenum properties in the Rocky Mountain Province. Sulfur isotopic measures suggest that at least some of the gypsum at Questa is hypogene in origin. Measurements of the 8 Sr/S6Sr ratio in a whole rock sample of the Mine Aptitc yield an initial ratio of 0.7069 similar to previously reported ratios for volcanic and intrusive rocks in the western United States. © 1969 Society of Economic Geologists, Inc.

引用

页码：903 / &

共 24 条

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