| 王中亮.胶东望儿山金矿床构造-热事件时序:野外地质证据[J].地质与勘探,2011,47(6):1067-1076 |
| 胶东望儿山金矿床构造-热事件时序:野外地质证据 |
| Timing of Structural-thermal Events in the Wang'ershan Gold Deposit,Eastern Shandong: Evidence from Field Investigations |
| 投稿时间：2011-01-11 修订日期：2011-07-06 |
| DOI： |
| 中文关键词: 望儿山 金矿 热事件 成矿时序 胶东 |
| 英文关键词: Wang'ershan, gold deposit, thermal event, mineralization timing |
| 基金项目:国家科技支撑计划课题(No. 2011BAB04B09)、教育部新世纪优秀人才支持计划(No. NCET-09-0710)、自然科学基金项目
(No. 40872068 和40672064),教育部长江学者和创新团队(No. IRT0755)及111 计划(No. B07011)资助。 |
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| 中文摘要: |
| [摘 要]望儿山金矿床是位于山东招远-莱州金矿区西部焦家金矿田内的一个大型金矿床,矿区内断裂构造发育,总体走向为NNE-NE,其控制了矿区蚀变带的展布;矿床由石英脉型矿体和蚀变岩型矿体组成,两者均严格受断裂构造的控制。通过对望儿山金矿床的野外地质考察,根据野外观察到的构造性质、切割关系以及地质体的穿插关系认为矿区内构造-热事件时序为:①黑云母花岗岩→②花岗伟晶岩脉→③早期钾长花岗岩脉→④近EW 向右行正断层和煌斑岩脉→⑤主干断裂(F1、F5、F5')、黑云母花岗岩的热液蚀变和晚期钾长花岗岩脉→⑥近SN 向逆断层、NE 向平行正断层系和石英硫化物脉→⑦NW 和NE 向成矿后断裂以及F1、F5、F5爷断裂发生左行逆断;成矿时序为:①花岗伟晶岩脉成矿→②钾长花岗岩脉成矿→③蚀变岩型矿体形成→④石英脉型矿体形成。 |
| 英文摘要: |
| Abstract:The Wang'ershan gold deposit is a large-sized gold deposit, which is located in the Jiaojia gold field west of the Zhaoyuan-Laizhou gold
zone, eastern Shandong Province. In this mine area, there are well-developed faults with a general trend in NNE-NE direction. The distribution of alteration zones is controlled by the faults. The deposit is composed of altered rock-type and quartz vein-type ore bodies, which are both controlled by the faults.Based on the field geological investigation in the Wang`ershan gold deposit, especially the fault properties and cutting relations of geological bodies, we suggest the timing of structural-thermal events in this region is as follows: ①biotite-granites → ②granitic pegmatite dikes → ③early K-feldspar graniteveins → ④EW-trending dextral normal faults and lamprophyre dikes → ⑤main faults (F1, F5 and F5'), hydrothermal alteration of biotite granites and late K-feldspar granite veins → ⑥SN-trending thrust faults, NE-trending parallel normal faults and quartz sulfide veins → ⑦main faults (F1, F5 and F5') changing into left-reverse faults and post-mineralization faults. The mineralization timing is as follows: ①mineralization in granitic pegmatite dikes → ②mineralization in K-feldspar granite veins → ③the formation of altered rock-type ore bodies → the formation of quartz vein-type ore bodies. |
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