| 粤西河台金矿区构造与成岩成矿关系研究 |
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| 引用本文：岳石.1991.粤西河台金矿区构造与成岩成矿关系研究[J].地球学报,12(2):85-97. |
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| 摘要点击次数: 2093 |
| 全文下载次数: 2013 |
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| 中文摘要:本文通过对粤西河台金矿区内的构造展布、力学性质和活动历史等特征的野外调查总结,阐明了该区构造发展演化规律,鉴定出“河台拐肘构造”这一新的构造类型,恢复了该区构造发展史。通过对金矿的成矿特征的调查,指出河台金矿是经过多期成矿作用叠加而成,提出了构造矿源带的概念,总结了构造成岩成矿模式。并从能量平衡理论探讨了构造成岩成矿作用机制。通过高温高压岩石变形实验和物质组分迁移的观察与分析,印证了野外所鉴定的构造型式和构造成矿规律。 |
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| STUDIES OF THE RELATIONSHIP BETWEEN TECTONISM AND PETROGENESIS AND METALLIZATION IN HETAI GOLD MINE REGION,WESTERN GUANGDONG |
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| Abstract:There are five parts in this dissertation: The first part outlines the regional tectonic, sedimentation. magmatism and the distributions of gold ore deposits in western Guangdong. In the second part, the development and evolutions of structures in Hetai investigation area have been analysed and expounded in detail. A new structural pattern called elbow structure has been found and determined in the field work and its formation, development and evolution have been studied. The elbow structure in Hetai area played an important role in the the controls of petrogenesis and matallization in this area. The origin of the mylonite zones developed in this area, which obviously control the gold ore distribution to a great extent, has very close relations with the development of the elbow structure. The existence of the elbow structure has been reconfirmed by the measurements of finite strain over the area. The third part has dealed with the charactoristics of tectonic control of petrogenesis and metallizations. A new theory about the mechanism of tectonopetrogenesis and tectonometallizations has been advanced according to the law of conservation of energy. The fourth part of this thesis has introduced the processes and results of the experiment about the formation of ductile structures and tectonopetrogenesis and tectonometallization. The experiment have reappeared the ductite struotural pattern in the field, such as ductile shear zones, ductile compression zones, elbow structure and the concentration of metallogenic materials along sueh ductile structures. The reactivation and migrations of metallogenic materials following rock deformation bave been observed both by eyes on the samples and on the thin section under microscope or determined by chemical analyses and electron probe, which strongly supports the theory of tectonopetrogenesis and tectonometallization. In the last part, the tectonopetrogenesis and tectonometallization model in Hetai region has been summarized. A new law for ore prediction, energy state law, has been posed and some areas which are promising to provide gold ore deposits have been indicated. |
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