| 新疆阿舍勒铜矿区火山岩与成矿 |
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| 引用本文： | 王登红.新疆阿舍勒铜矿区火山岩与成矿[J].地质科学,1996,31(2):163-169. |
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| 作者姓名： | 王登红 |
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| 作者单位： | 中国地质科学院研究生部 北京 100083 |
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| 摘 要： | 阿舍勒铜矿曾被认为是次火山热液矿床。根据岩芯观察研究和同位素、微量元素及稀土元素地球化学研究,认为该矿属海相火山喷气沉积成因,成矿作用与双峰式火山岩密不可分,细碧岩是成矿金属元素的主要来源,而作为沉淀剂的硫主要由酸性火山喷气作用提供。
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| 关 键 词： | 阿舍勒铜矿 火山喷气－沉积 双峰式火山岩 新疆 |
| 收稿时间： | 1994-05-30 |
| 修稿时间： | 1994-05-30; |
THE VOLCANIC ROCKS AND MINERALIZATION IN ASHELE Cu MINE,XINJIANG |
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| wang Denghong.THE VOLCANIC ROCKS AND MINERALIZATION IN ASHELE Cu MINE,XINJIANG[J].Chinese Journal of Geology,1996,31(2):163-169. |
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| Authors: | wang Denghong |
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| Institution: | Graduate Department of Chinese Academy of Geosciences, Beijing 100083 |
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| Abstract: | The Ashele copper deposit is a typical volcanic-hosted massive sulfide deposit found in northwest of Xinjiang, China about ten years ago.However, what is the initial relationship between volcanic rocks and ores has not been studied in detail.This paper introduces some new opinions based on the outside and indoor works recently.We found that the mineralization elements mainly came from spilite, for ores and spilite have the same lead isotopic and rare earth element geochemistry features which are far differrent from that of the tuffs.Apart from this, the spilite below the main orebody has a low Cu content (about 64μg /g), showing that nearly half of its initial Cu has been depleted and transported into the ores.So, among the seven mineralization zones only the No.1 produced a large deposit, because only here the spilite is thickist thus contributing economical ore-forming materials.Even though the ore-forming metals came from spilite, sulfur might come directly from volcano eruption, neither from seawater, nor from the leaching of host rock by hydrothermal solution, because only the barite polymetalic ores from the No.2 mineralization zone have a characteristic scattered δ34S value.All of the sulfides from the main orebed bear very similar δ34S value, constructing a sulfur isotope tower distribution.In one word, sulfur came from the volcano eruption or exhalation, and metals from the volcanic rocks, especially from spilite by water-rock interaction. |
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| Keywords: | Ashele Cu deposit Exhalation-sedimentary genesis Bimodal volcanic rocks |
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