| 冯志兴.西藏尤卡朗铅银矿成矿构造初步研究[J].地质与勘探,2010,46(4):628-633 |
| 西藏尤卡朗铅银矿成矿构造初步研究 |
| A Preliminary Study on Mineralizational Structure of the YouqialangLead-Silver Deposit in Tibet |
| 投稿时间：2010-03-08 修订日期：2010-06-28 |
| DOI： |
| 中文关键词: 控矿构造 应力分析 铅银矿 尤卡朗 西藏 |
| 英文关键词: ore-controlling structure,stress analysis,lead-silver deposit,Youqialang,Tibet |
| 基金项目: |
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| 中文摘要: |
| [摘要]西藏尤卡朗铅银矿床处于西藏冈底斯北侧当雄-嘉黎银铅锌多金属成矿带上,矿体产于
中侏罗统拉贡塘组受岩浆热变质的砂泥质岩中。矿区北部出露燕山至喜马拉雅期中酸性侵入岩体,可
能与本区铅银成矿作用有直接的关系。铅银矿体产于断裂构造带中,受多期构造活动的控制。矿体中
常见脉状穿插和角砾状构造,多组构造裂隙互相交叉形成不规则网脉。综合研究矿区中小型成矿构造
特征,通过本区构造应力场分析表明,早期应力场反映北部岩体向南上侵,晚期构造应力场转变形成有
利的含矿构造,进一步形成向南西倾伏的管状矿体,从构造控矿角度探讨了本区进一步找矿方向。 |
| 英文摘要: |
| Abstract:The Youqialang lead-silver deposit lies in the Dangxiong-Lhari Pb-Zn-Ag polymetallic ore belt,north of Gandis,Tibet. The ore bodies
were produced in the sandy argillite,that was affected by magmatic thermal metamorphism,in the Lagongtang Group of middle Jurassic series. Acid intru鄄
sions of the Yanshan to Himalayan period exposed in the north of the mine may be related to lead-silver mineralization. The lead-silver ore bodies pro鄄
duced in the fault belt,controlled by the multi-period tectonic activity,are generally seen vein interspersed and brecciated structures,multiple sets of struc鄄
tural fractures cross-cutting veins forming an irregular network. Research of the small- and medium-scale structures of mineralization and analysis of the
tectonic stress field of the region suggest that the early stress field reflects southward invasion of the northern rock body,and the change of the late tectonic
stress field led to the formation of favorable ore-bearing structures,and further to generate the southwest dipping tubular-like ore bodies. From the perspec鄄
tive of ore-controlling structures,this paper discusses the direction of further prospecting in this area. |
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