| 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 |
| Genre: | Article |
| ProdID: | 70013301 |
| Citation Author: | McKee, E. H. |
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| Citation End Page: | 435 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Economic Geology |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | K-Ar chronology of the Luohe iron district, Anhui Province, China; 1988; Article; Journal; Economic Geology; McKee, E. H. |
| Citation Start Page: | 433 |
| Citation Volume: | 83 |
| Citation Year: | 1988 |
| Type: | citation/reference |
| Text: | K-Ar chronology of the Luohe iron district, Anhui Province, China; 1988; Article; Journal; Economic Geology; McKee, E. H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1988 00:00 -0600 |
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