| 江西九瑞地区中生代两次构造事件及其对成岩成矿的控制 |
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| 引用本文：.1999.Two Mesozoic Tectonic Events in Jiurui Area Jiangxi Province and Their Controlling Role in Rock-forming and Ore-forming Activities[J].Mineral Deposits,18(2):129~137 |
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| 基金项目:国家攻关项目( 85-901-03-09-D) |
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| 中文摘要:庐山变质核杂岩体的抬升与大别隆起的南移是九瑞地区中生代的两次构造事件。九瑞地区中生代构造是这两次构造事件所形成的构造复合作用的结果。依据其复杂情况将该区划分出3种控岩控矿断裂构造类型．并阐述构造性质与岩浆侵位和成矿类型三者之间的关系。 |
| 中文关键词:变质核杂岩体 大别隆起 伸展构造 江西九瑞地区 |
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| Two Mesozoic Tectonic Events in Jiurui Area Jiangxi Province and Their Controlling Role in Rock-forming and Ore-forming Activities |
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| Abstract:Two tectonic events have taken place in Jiurui area since Mesozoic: one was the elevation of Lushan metamorphic core complex body in the south, which resulted in the formation of extensional structure in its neighboring areas; the other was the sliding and napping of Dabie uplift onto Yangtze massif in the north under the influence of the left-lateral translation of Tanlu fault, which formed southward compressional structure. Compounding occurred between the NEE-trending decollement stripping faults formed by the former event and a set of NE-and NW-trending compresso-shear faults formed by the latter event, in which the NE-trending faults frequently yielded to the NEE-trending ones, while NW-striking faults commonly assumed discontinued tracing distribution due to the interference of the NEE-striking ones. In consequence, a network fault system composed of NEE- and NW-trending faults was formed in this area. According to the compounding conditions of the faults, three types of rock-controlling and ore-controlling faults can be recognized in this system: (1) simple faults, viz. NEE-, NE-and NW-trending faults not subjected to compounding, which are mainly related to lenticular and veinlike injected intrusives that chiefly contain small-sized S and Cu mineralizations. (2) intersection faults, with the intersections between the NEE-trending decollement stripping faults and the NW-trending compresso-shear faults having the greatest significance. The relevant intrusive bodies are mostly inverted drop-shaped stopping emplaced rock bodies associated primarily with fairly large-sized skarn, porphyry and hydrothermal Cu, S, Mo and Au mineralizations; (3) compound faults formed by the compounding between NEE- and NE-striking faults, which are mainly related to stratoid injected rock bodies associated mostly with medium-and small-sized veinlike Pb, Zn, Ag, Cu and Au mineralizations. |
| keywords:complex body of metamorphic core, Dabie uplift, extensional structure, Jiurui in Jiangxi |
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