| Mineral Chemistry and Boron Isotopic Composition of Tourmaline from the Devonian Metallogenic District of Shanyang-Zhashui,Eastern Qinling |
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| 摘 要： |
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| 关 键 词： | 电气石 矿物化学 硼同位素 秦岭地区 泥盆纪 金属矿物分布 |
Mineral chemistry and boron isotopic composition of tourmaline from the Devonian metallogenic district of Shanyang-Zhashui, eastern Qinling |
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| Authors: | Chunji Xue Shaoyong Jiang Yanhe Li |
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| Institution: | (1) Xi’an Engineering University, 710054 Xi’an;(2) Geology Department, University of Bristol, England;(3) Institute of Mineral Deposits, Chinese Academy of Geological Sciences, 100037 Beijing |
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| Abstract: | Toumaline is widespread in the host strata of strata-bound base metal sulphide deposits in the Devonian metallogenic district
around Shanyang-Zhashui in eastern Qinling. As a member of the schorl-dravite series, the tourmaline is characterized by Mg
> Fe and Na > Ca, showing apparent chemical zonation which records the geochemistry during its formation and subsequent regional
metamorphism and hydrothermal overprint. The close similarity in chemical and isotopic constitutions between the tourmaline
of the main metallogenic epoch in this district FeO/(FeO + MgO)=0.34 − 0.39 and δ11B=−7.6‰ − − 8.8‰] and those related to massive sulphide deposits typical of submarine (exhalative) hydrothermal sedimentation
may add further support to a similar mechanism of mineralization for the strata-bound deposits in the district.
Supported by the Foundation for Young Scientists under the National Natural Science Foundation of China. |
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| Keywords: | tourmaline mineral chemistry boron isotope eastern Qinling |
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