| 丁式江,彭少梅.琼西戈枕断裂带的有限应变分析及其意义[J].地质找矿论丛,1993,(2):34-42 |
| 琼西戈枕断裂带的有限应变分析及其意义 |
| STRAIN ANALYSIS AND ITS IMPLICATION OF GEZHEN FAULT ZONE IN WESTERN HAINAN |
| 投稿时间：1992-07-27 |
| DOI：10.6053/j.issn.1001-1412.1993.2. 004 |
| 中文关键词: 戈枕断裂带 有限应变分析 拆离构造 推覆构造 平移剪切 金矿床 |
| 英文关键词: |
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| 中文摘要: |
| 琼西戈枕断裂带是海南岛最重要的金矿带,断裂带构造岩及金矿体中广泛发育变形石英颗粒.这些变形石英颗粒的三维有限应变分析表明:糜棱岩型金矿床形成于总体伸展构造背景,与断裂带印支期的韧性拆离构造有关;破碎带蚀变岩型金矿床形成于总体挤压构造背景,与断裂带中印支晚-燕山早期的韧-脆性逆冲推覆构造有关;石英脉型金矿床形成于总体平移剪切状态,与断裂带中燕山中晚期的脆性平移剪切运动、块断滑脱运动有关. |
| 英文摘要: |
| Gezhen fault is a most important gold mineralization zone in western Hainan. Deformed quartz is widely developed in tectonite and gold ore. Three-dimension strain analysis of the quartz grains indicates that mylonite type gold deposit, related to the ductile detachment in Indosinian period, is formed in extensional setting, and Jiaojiang type gold deposit related to ductile to-brittle thrust in Later Indosinian to Early Yanshanian period, is formed in pressure setting, and quartz vein type gold deposit related to brittle simple shear and block faulting during Middle to Later Yanshanian period, is formed in transitional shearing state. |
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