| 阿舍勒铜锌块状硫化物矿床地质特征和成因 |
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| 引用本文： | 叶庆同,傅旭杰,张晓华.阿舍勒铜锌块状硫化物矿床地质特征和成因[J].矿床地质,1997,16(2):97-106. |
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| 作者姓名： | 叶庆同 傅旭杰 张晓华 |
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| 作者单位： | [1]中国地质科学院矿床地质研究所 [2]中国地质科学院区划室 |
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| 基金项目： | “八五”国家科技攻关项目 |
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| 摘 要： | 阿舍勒矿床与早－中泥盆世双峰式火山活动有着成因联系，产于火山洼地中，它在喷气－沉积阶段形成，后又细历了变质改造和岩浆热液叠加。矿床具有双层结构，很好的矿化分带和刨变分带。成矿流体的温度，压力和酸碱度等物理化学条件变化引起了围岩蚀变和矿石堆积，在海底界面上下形成了具有成因联系的两套矿化。
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| 关 键 词： | 铜矿床 锌矿床 硫化物矿床 地质特征 成因 |
Geological Characteristics and Genesis of the Ashele Copper-zinc Massive Sulfide Deposit, Xinjiang |
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| Ye Qingtong,Fu Xijie.Geological Characteristics and Genesis of the Ashele Copper-zinc Massive Sulfide Deposit, Xinjiang[J].Mineral Deposits,1997,16(2):97-106. |
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| Authors: | Ye Qingtong Fu Xijie |
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| Abstract: | The Ashele massive sulfide deposit occurs in the Ashele Devonian volcano-sedimentary basin lying on the southern margin of Altay orogenic belt. The basin was formed as a result of rift evolution on the basis of Proterozoic-Early Paleozoic continental crust, and experienced deformation of regional nappe structure. Mineralization took place at the interval between Early-Middle Devonian volcanic activities of the bimocial spilite-keratophyre volcanic suite. The deposit has two-layer structure: a massive sulfide orebody in the upper part and a disseminated sulfide orebody in the lower part. In the massive sulfide orebody there exisths vertical zonation of S-Cu, S-Cu, Zn, S-Cu, Pb, Zn-Cu, Zn, Pb, BaSO4 which is a reflection of ore accumulation sequence at the bottom of the sea. Around the disseminated sulfide orebody are well-developed wall rock alterations, which exhibit from the inside outward the zonation of sericite-quartz metasomatite chlorite-sericite metasomatite weakly hydrolytic pyroclastic rocks, suggesting characteristics of acid leaching. Studies of ore deposit geology, temperature-pressture geochemistry and stable isotope geochemistry indicate that the ore-forming fluids were composed of deeply-circulating sea water and magmatic water, and that the ore-forming materials were derived from the lower crust. ln addition, the ore-forming process has been discussed and a metallogenic model of mixed fluids comprising deeply circulating sea water and magmatic water has been established. |
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| Keywords: | massive sulfide deposit mineralization zoning alteration zoning metallogenic model Ashele of Xinjiang |
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