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K-Ar chronology of the Luohe iron district, Anhui Province, China

Economic Geology

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Abstract

Twelve samples of rock from the four mapped units or cycles and one of the major intrusive bodies were collected and evaluated for K-Ar age determination. These include specimens from outcrop and from drill core. Biotite from two outcrop and two core samples and hornblende from one outcrop sample were separated from the sample and dated; a sixth sample was dated using crushed, sieved, and acid-treated whole rock. The ages and analytical data to support them are compatible with the observed relationships in the field or from the drill holes. The percent of K2O in all samples is typical of fresh unaltered mineral phases and the percent of radiogenetic 40Ar relative to total 40Ar is high (88.8 to 63.8%) yielding relatively low analytical errors. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
K-Ar chronology of the Luohe iron district, Anhui Province, China
Series title:
Economic Geology
Volume
83
Issue:
2
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Economic Geology
First page:
433
Last page:
435