| Massive Sulphide Deposits Related to the Volcano-Passive Continental Margin in the Altay Region |
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| 作者姓名： | WANG Jingbin DENG Jiniu ZHANG Jinhong and QIN KezhangBeijing Institute of Geology for Mineral Resources State Bureauof Nonferrous Metal Industry Andingmenwai Beijing Zhu Xiling |
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| 作者单位： | WANG Jingbin，DENG Jiniu，ZHANG Jinhong and QIN KezhangBeijing Institute of Geology for Mineral Resources，State Bureauof Nonferrous Metal Industry，Andingmenwai，Beijing 100012 Zhu Xiling |
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| 摘 要： | The Devonian volcano-passive continental margin in southern Altay is a significant volcanogenic massive sulphide metallogenic belt. Acidic volcanism has been dominant on the inner side of the volcano-passive continental margin, i.e., near the old land, resulting in a Pb-Zn metallogenic sub-belt, in which the ore deposits are hosted by sedimentary rocks in volcanic series, as represented by the large Koktal Pb-Zn deposits. In the central part of the margin far away from the old land, bimodal volcanic formations are well developed, forming volcanics-hosted Cu-Zn metallogenic sub-belts, e.g., the large-scale Ashele Cu-Zn deposit. The Qiaoxiahala sub-belt on the outer side of the margin near the ocean ridge is located at the spreading central trough, where ophiolite suites are developed. This type of deposits is rich in gold and copper, similar to the Cyprus-type Fe-Cu-Au metallogenic sub-belt in metallogenic environment (represented by the Qiaoxiahala medium-scale Fe-Cu-Au deposit). From the old land to th
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| 关 键 词： | volcano-passive continental margin massive sulphide deposit Altay type Xinjiang |
Massive Sulphide Deposits Related to the Volcano-Passive Continental Margin in the Altay Region |
| |
| Authors: | WANG Jingbin DENG Jiniu ZHANG Jinhong and QIN KezhangBeijing Institute of Geology for Mineral Resources State Bureauof Nonferrous Metal Industry Andingmenwai Beijing Zhu Xiling |
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| Abstract: | The
Devonian volcano-passive continental margin in southern Altay is a significant
volcanogenic massive sulphide metallogenic belt. Acidic volcanism has been dominant on the
inner side of the volcano-passive continental margin, i.e., near the old land, resulting
in a Pb-Zn metallogenic sub-belt, in which the ore deposits are hosted by sedimentary
rocks in volcanic series, as represented by the large Koktal Pb-Zn deposits. In the
central part of the margin far away from the old land, bimodal volcanic formations are
well developed, forming volcanics-hosted Cu-Zn metallogenic sub-belts, e.g., the
large-scale Ashele Cu-Zn deposit. The Qiaoxiahala sub-belt on the outer side of the margin
near the ocean ridge is located at the spreading central trough, where ophiolite suites
are developed. This type of deposits is rich in gold and copper, similar to the
Cyprus-type Fe-Cu-Au metallogenic sub-belt in metallogenic environment (represented by the
Qiaoxiahala medium-scale Fe-Cu-Au deposit). From the old land to the ocean, the
mineralizing age becomes younger, i.e., from Early Devonianà Early and Middle
Devonianà Middle Devonian, forming a complete metallogenic zoning series on the
volcano-passive continental margin. Comparative studies show that the massive sulphide
deposits distributed on the volcano-passive continental margin are different from those
formed under a plate subduction regime and oceanic ridge environment; the former have
their unique features and wide distributions, representing a new type of volcanogenic
massive sulphide deposits¾ the Altay type. |
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| Keywords: | volcano-passive continental margin massive sulphide deposit Altay type Xinjiang |
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