| 秦岭勉略宁地区金矿床形成模式与找矿方向 |
| 马建秦
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| 1998
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| 学位授予单位 | 中国科学院地球化学研究所
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| 学位授予地点 | 中国科学院地球化学研究所
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| 学位名称 | 博士
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| 学位专业 | 地球化学
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| 关键词 | 秦岭
勉略宁地区
金矿床形成模式
找矿方向
改造成矿作用
成矿物质来源
矿化与蚀变
含金富砷黄铁矿增生环带
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| 摘要 | 总结了研究区金改造成矿的动力学背景和构造控矿规律；将金矿床划归改造型金矿床的两个亚类；提出了相应的找矿标志和靶区。详细划分了煎茶岭大型金矿床的构造变形序列；提出超基性岩体的蚀变早于金成矿，与其有关的热液不足以形成金矿床；发现了含金富砷黄铁矿增生环带；同位素和稀土元素对成矿物质来源的示踪研究，否定了前人提出的岩浆热液成矿模式；该矿床可以用深源成矿流体－韧-脆性剪切带控矿－硫化物化模式描述。 |
| 其他摘要 | The dynamic setting of gold reforming metallogenses and the distribution regular of the structure-controlled deposits in the research area. The gold deposits are divided into the two subtypes of reforming type, and their prospective criterions and promising areas are also proposed respectively. The structural deformation sequence of the Jianchaling large gold deposit are analyzed in details; it is proposed that the ultamafic mass must have been extensively subjected to alteration before the gold mineralizing and the hydrothermal fluid related to the alteration is not enough to form the gold deposit; a gold-bearing and arsenic-rich pyrite growth band is discerned in the deposit; the results of the tracing studies, with some isotopes and rare earth elements, on the source of ore-forming materials, indicate that the magmatic hydrothermal ore-forming model proposed by former researchers is not a fact and the deposit can be delineated by a model, which is fluid from a deep source-mineralization controlled by ductile-brittle shear deformation -sulfidization. |
| 页数 | 91
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| 语种 | 中文
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| 文献类型 | 学位论文
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| 条目标识符 | http://ir.gyig.ac.cn/handle/352002/4052
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| 专题 | 研究生_研究生_学位论文
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推荐引用方式
GB/T 7714 |
马建秦. 秦岭勉略宁地区金矿床形成模式与找矿方向[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,1998.
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