| 刘劲松.贵州松桃—湖南吉卫地区铅锌矿地质特征及找矿方向[J].地质与勘探,2015,51(4):634-645 |
| 贵州松桃—湖南吉卫地区铅锌矿地质特征及找矿方向 |
| Geological characteristics of Pb–Zn deposits and prospecting directions in Songtao，Guizhou Province and Jiwei，Hunan Province |
| 投稿时间：2015-03-28 修订日期：2015-05-16 |
| DOI： |
| 中文关键词: 铅锌矿 地质特征 找矿方向 松桃 吉卫 |
| 英文关键词: Pb–Zn Deposits, geological characteristics, prospecting directions, Songtao, Jiwei |
| 基金项目:中国地质调查局项目(编号：1212010981042及12120113068000)资助 |
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| 中文摘要: |
| 贵州松桃—湖南吉卫地区位于上扬子地块和江南隆起带的结合部位，是湘西—鄂西铅锌多金属成矿带的重要组成部分。铅锌赋矿层位主要为下寒武统清虚洞组下段的藻灰岩，其次为清虚洞组上段白云岩，矿床受到地层和NNE向构造的控制，矿体呈层状或似层状，在麻栗场断裂以西，清虚洞组下段中矿石矿物以闪锌矿为主，在该断裂以东，清虚洞组上段中矿石矿物以方铅矿为主，围岩蚀变主要有硅化、方解石化、白云石化等，研究区方铅矿受构造控制作用更为显著。在成矿地质特征、化探异常、控矿因素等综合分析的基础上，认为该区NNE向麻栗场断裂以西的下寒武统清虚洞组下段藻灰岩为有利的找矿岩性段，嗅脑—杉木冲、下帽山、小平茶一带具有进一步找矿前景。 |
| 英文摘要: |
| Situated in the junction between the upper Yangtze block and Jiangnan uplift, the Songtao—Jiwei area is an important section of the Xiangxi–Exi Pb–Zn polymetallic ore belt. The main ore–bearing stratum is algal limestone in the lower member of the lower Cambrian Qingxudong Formation, and next dolomicrite in the upper member of the Qingxudong Formation. Pb–Zn deposits are controlled by strata and NE trending structures and ore bodies occur in stratified or stratoid with the same trending as the strata. The ore minerals of the lower member of Qingxudong Formation are mainly sphalerite west of the Malichang fault while those of the upper member of the strata are mainly galena east of this fault. Wall rock alteration of silicification, calcitization and dolomitization can be observed in the study area. Based on geological background, geochemical characteristics and ore controlling factors, we suggest that the favorable exploration rocks in this region are algal limestone of lower Cambrian Qingxudong formation west of NNE trending Malichang fault. Besides, there is further ore–search prospect around Xiunao–Shamuchong, Xiamaoshan and Xiaopingcha areas. |
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