[an error occurred while processing this directive] ������� 2010, 29(2) 203-210 DOI:     ISSN: 1004-5589 CN: 22-1111/P

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40Ar /39Ar ����
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PubMed
Article by Diao, Y. J. 1
Article by Cui, P. L. 1
Article by Wang, Q. H. 2
Article by Sun, J. G. 1
Article by Guo, J. 1
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�ؼ����� 40Ar /39Ar ����   ���������   Ӣ���ӽ��   ����   ������  
40Ar /39Ar laser probe dating of fluid inclusions and discussion on metallogenic epoch of Yingchengzi epithemal Au deposit in Ning'an area of Heilongjiang
DIAO Yu-Jun-1, CUI Pei-Long-1, WANG Qing-Hai-2, SUN Jing-Gui-1, GUO Jia-1
1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. International Centre for Geoscience Research and Education in Northeast Asia��Jilin University��Changchun 130026��China
Abstract:

Yingchengzi Au deposit is located in ductile-brittle shear zone of Early Paleozoic granite which emplaced at Zhangguangcailing magma structural zone. The orebody is composed of granitic mylonite schist��sulfidequartz vein and pure sulfide vein��and the ore-hosting rock is Late Ordovician biotite monzonite granite. 40Ar /39Ar isochron age of quartz fluid inclusion in auric quartz vein is 207 ± 5. 5 Ma (40Ar /36Ar Int. = 410 ± 11��MSWD = 44��n = 31). Rejecting some data points with major relative errors and using Isoplot process fit��the isochron age is 248 ± 39 Ma (40Ar /36Ar Int. = 344 ± 54��MSWD = 0. 37��Probability = 0. 99). According to the development situation of regional structural thermal event��the authors preliminarily confirm that the mineralization occurs in the conversion phase from Late Permian to Early Triassic or in the course of eastern Xingmeng orogeny process.

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