| 陈 冲.夏塞银铅锌矿床控矿断裂构造及矿体定位机制[J].地质与勘探,2017,53(1):87-96 |
| 夏塞银铅锌矿床控矿断裂构造及矿体定位机制 |
| Ore-controlling faults and orebody location mechanism of the Xiasai silver-lead-zinc deposit |
| 投稿时间：2013-11-23 修订日期：2016-05-20 |
| DOI：10.12134/j.dzykt.2017.01.009 |
| 中文关键词: 夏塞矿床 控矿断裂 构造序次 成矿应力场 定位机制 |
| 英文关键词: Xiasai ore deposit, ore-controlling fault, fault structural generation, metallogenic mechanical field, localization mechanism |
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| 中文摘要: |
| 义敦岛弧中段夏塞地区发育多个由断裂破碎带控制的大、中型岩浆热液脉状多金属矿床，这些矿床具有极其相似的地质背景，形成于相同断裂构造体系。为该地区热液矿床下一步找矿勘探提供理论依据及借鉴，选取夏塞银铅锌矿床进行控矿断裂特征调查、断裂构造序次和成矿应力场分析及矿体定位机制研究。通过对该矿床的成矿地质背景及控矿断裂构造综合研究，表明：（1）矿区NNW向控矿断裂具有多期活动且成矿阶段断裂性质为左行正断层；（2）矿体定位于德格-乡城断裂和德莱-定曲断裂（Ⅰ）的次级断裂（Ⅱ）所派生的NNW向更次级的结构面（Ⅲ）中；（3）矿区NNW向断裂控制着矿化局部富集空间、矿脉展布型式及矿体的产出。 |
| 英文摘要: |
| The Xiasai area, located in middle of the Yidun arc, hosts several large- and medium-scale vein-shaped polymetallic deposits controlled by faults. These deposits have very similar geological backgrounds and formed in same fault structure systems. In order to provide theoretical support and references for next mineral prospecting, we choose the Xiasai deposit to study metallogenic geological characteristics, fault structural generation, metallogenic mechanical field and ore body location mechanism. Our work focuses on the metallogenic geological background and ore-control faults. The results indicate the NNW trending faults in the mine area have experienced multiple periods of activities and are left-lateral normal faulting in metallogenic stage. The orebody is located in NNW-trending faults (Ⅲ) and secondary structures of the Litang-Xisai fault(Ⅱ),which belongs to the Dege-Xiangcheng and Delai-Dingqu faults (Ⅰ). The NNW-trending faults control the vein shape, size and spatial distribution of ore bodies in this area. |
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