| 王自力.内蒙古多伦县义盛店银多金属矿控矿构造分析及深部找矿预测[J].地质与勘探,2018,54(2):252-263 |
| 内蒙古多伦县义盛店银多金属矿控矿构造分析及深部找矿预测 |
| The ore-controlling structure and prediction of the deep orebody in the Yishengdian silver polymetallic deposit, Duolun county, Inner Mongolia |
| 投稿时间：2017-03-06 修订日期：2018-01-20 |
| DOI：10.12134/j.dzykt.2018.02.004 |
| 中文关键词: 控矿构造 找矿预测 华北克拉通北缘 银多金属矿 多伦 |
| 英文关键词: ore-controlling fault, exploration prediction, northern margin of North China Craton, silver polymetallic deposit, Duolun |
| 基金项目:国家自然科学基金项目（1502211）、河北省自然科学基金项目（D2015403013）和中国地质调查局项目(1212011120701，1212011120711，12120114064201)联合资助 |
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| 中文摘要: |
| 义盛店银多金属矿床位于华北克拉通北缘多伦盆地内，以矿带宽，地表延伸稳定而著称。经近几年地质勘查，仅矿区浅部银金属量就已达中型规模，但深部找矿效果欠佳，导致探矿工作陷入困境。本文通过对义盛店矿区主矿带V号带成矿控矿构造分析，认为矿区成矿控矿构造为一张性断裂（F5），断裂的形态及运动学特征导致V号矿带中的矿体呈现膨缩相间、尖灭再现的透镜状特征。含矿流体沿断裂向上运移的过程中，由于成矿系统温、压条件的改变，导致流体内的成矿元素沉淀、析出。矿区以往深部勘探效果不佳的原因是钻孔打在了透镜状矿体的窄矿段（或尖灭处），故无法见到预期的厚、富矿体。根据矿体在平面、剖面上的产出特征和空间分布规律，结合48线激电测深反演结果，预测在V号矿带的延深方向上，标高1300m~1200m的空间内存在着另一个透镜状厚大的富矿体。 |
| 英文摘要: |
| The Yishengdian silver polymetallic deposit is located in the northern margin of North China Craton, Duolun Basin, which is known for its wide mineralized zone and stable surface extension. After geological exploration in recent years, only the shallow silver metal resources of this deposit have reached a medium-sized scale, but the deep exploration is not so effective, leading to difficulties in further prospecting. Through the analysis of ore-controlling structure of No.V belt in the Yishengdian mine area, this work suggests that the tensional fault (F5) is the primary feature controlling orebodies, which made the orebodies have a lenticular shape with alternating dilation and shrink, and pinching out and reappearing. When the ore-bearing hydrothermal fluid flowed along the tensional fault upward, the sudden changes of temperature, pressure and other factors of the hydrothermal system and mixing with shallow crust fluid resulted in the precipitation and separation of ore-forming elements to form the deposit. The earlier drillings which controlled deep orebodies only hit the narrow segment of the lenticular orebody, therefore could not encounter the thick orebody expected. According to the inversion results of IP sounding on exploration line 48, it is predicted that there may be another high-grade and thick lenticular orebody between elevations of 1300m and 1200m in the extension direction of the No. V ore belt. |
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