Diagenetic-metallogenic ages of pyritic cherts and their implications in Mojiang nickel-gold deposit in Yunnan Province,China

FANG Weixuan; HU Ruizhong; XIE Guiqing; SU Wenchao; QI Liang

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Diagenetic-metallogenic ages of pyritic cherts and their implications in Mojiang nickel-gold deposit in Yunnan Province,China

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Diagenetic-metallogenic ages of pyritic cherts formed by the syn-sedimentation of hydrothermal vent and ages of the Jinchang Rock Formation in the Mojiang large nickel-gold deposit in the Ailaoshan gold metallogenic belt have been discussed on the basis of chronology of isotopic geochemistry. Nickel-gold-bearing pyritic cherts in the mining were formed by syn-sedimentation of hydrothermal vent in the Late Devonian, i.e. age by Sm-Nd isochronal method (t) = (358±8.6) (2σ) Ma and age by Rb-Sr isochronal method (t) = (354.7±0.72) (2σ) Ma. On the other hand, deep-water cherts from the Jinchang Rock Formation of the Upper Devonian in the area were initiated at the same time; that is, age by Sm-Nd isochronal method (t) = (359(+21) (2(7) Ma and age by Rb-Sr isochronal method (t) = (358.02±0.30) (2σ) Ma.

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《中国科学通报：英文版》 |2001年第21期|1823-1827|共5页
作者
FANG Weixuan; HU Ruizhong; XIE Guiqing; SU Wenchao; QI Liang;
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作者单位

Laboratory of Ore Deposit Geochemistry;

Institute of Geochemistry;

Chinese Academy of Sciences;

Guiyang 550002;

China;

Northwest Geological Exploration Bureau;

Chinese National Nonfer-rous Metal Corporation;

Xi’an 710054;

China;

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原文格式 PDF
正文语种 chi
中图分类同位素地质学与地质年代学;
关键词
metallogenic; age; age; by; Sm-Nd; isochronal; method; age; by; Rb-Sr; isochronal; method; Mojiang; nickel-gold; deposit.;

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Diagenetic-metallogenic ages of pyritic cherts and their implications in Mojiang nickel-gold deposit in Yunnan Province,China

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