| 丁式江.琼西戈枕断裂带构造演化与金矿化系列[J].地质找矿论丛,1994,(3):1-8 |
| 琼西戈枕断裂带构造演化与金矿化系列 |
| THE TECTONIC EVOLUTION OF THE GEZHEN FAULT ZONE AND ITS GOLD MENERALIZATION SERIES |
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| DOI：10.6053/j.issn.1001-1412.1994.3. 001 |
| 中文关键词: 戈枕断裂带 构造演化 金矿化系列 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 戈枕断裂带经历了漫长的多期次动力变形变质作用过程,总体表现为早期韧性,晚期为韧-脆性至脆性,而且与金矿化关系密切。加里东─海西早期,伴随着区域变质作用、混合岩化作用和固态流变,戈枕断裂带雏形开始形成,产生不具工业意义的肠状脉形金矿化。印支期,戈枕断裂带整体处于伸展拆离状态,形成糜棱岩型金矿。印支晚─燕山早期,戈枕断裂带处于逆冲推覆构造的前锋地带,形成破碎带蚀变岩型金矿。燕山晚─喜山期,戈枕断裂带处于NE向左行平移剪切叠加块断运动状态,形成石英脉型金矿。四种金矿化的硫同位素组成惊人地一致,Pb、H、O同位素具有明显的演变规律,组成完整的金矿成矿系列。 |
| 英文摘要: |
| The Gezhen fault zone has undergone several times of dynamic deformation which wholly show ductile in early period and ductile-brittle in late period,and have a close relation with gold mimeralizations. During Caledonian to early Variscan Period. the embryonic form of the Gezhen foult zone began to form accompanied by metamorphism, migmatization and solid flow, this process formed the intestinal-shape type gold mineralizations. During lndosinian Period,the fault was wholly under extensional detachment state,formed the mylonite type gold deposits. During late Indosinian to early Yanshanian Period,the fault zone is located in frontal zone of thrust-nappe, which formed Jiaojia type gold deposits.Durirg late Yanshan to Himelayan period. the Gezhen fault zone was undergone NE-direction sinistral translational shearing, block faulting. which formed quartz-vein type gold deposits. The sulphur isotopic compositions of the four types of Au mineralization reach unanimity,but their lead,hydrogen and oxygen isotopes show very strong evolution regularities characterized by Au mineralization series with tectonic evolution of the fault. |
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