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甘孜—理塘成矿带梭罗沟式金矿床找矿模型初探
- 周福篯
- 作者单位：
- 四川省地质矿产勘查开发局区域地质调查队
基金项目：
- 四川省地矿局地勘基金项目（川地矿发〔2004〕67号）
详细信息：
- 作者简介：
- 周福篯（1972—），男，重庆石柱人，高级工程师，从事地质矿产勘查和金矿开发工作；成都市天府新区华阳街道通济桥下街1988号，四川省地质矿产勘查开发局区域地质调查队，610213；E-mail：490358926@qq.com
- 通讯作者：
- isnull
- PDF下载
Preliminary exploration of the prospecting model of Suoluogou type gold deposits in Ganzi-Litang metallogenic belt
- English Author：
- Sichuan Geology and Mineral Bureau Regional Geological Survey Team
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
甘孜—理塘成矿带处于三江褶皱系义敦优地槽和雅江冒地槽之间，是川西高原重要贵金属成矿带之一，其内相继发现数十处金矿床（点）。该成矿带北段的错阿金矿床、嘎拉金矿床，中段的阿加隆洼金矿床等，均与南段的梭罗沟金矿床在大地构造位置、赋矿地层、赋矿岩性、围岩蚀变、岩浆岩、矿物组分、地球化学特征、找矿标志及找矿方法等方面十分相似，通过对梭罗沟式金矿床的地质特征、地球化学特征、地球物理特征和找矿方法进行初步探索，建立了地质-地球化学-地球物理找矿模型，以指导找矿工作。区域构造、赋矿地层、构造蚀变带是寻找梭罗沟式金矿床重要的地质找矿标志；地球化学找矿主要采用水系沉积物测量和土壤地球化学测量，1∶20万水系沉积物测量是确定找矿靶区的基础，1∶2.5万、1∶5万水系沉积物测量是缩小找矿靶区的基本方法，1∶1万、1∶2 000土壤地球化学测量确定工程施工位置；地球物理找矿采用了X射线荧光光谱法和重、磁、电综合方法。该成矿带具备形成特大型金矿床的基本要件，但由于诸多因素制约，其找矿潜力并未充分释放，如果加大投入，有望成为全国著名的成矿带。
关键词:
梭罗沟式金矿床；地质特征；找矿模型；甘孜—理塘成矿带；找矿标志
Abstract:
Ganzi-Litang metallogenic belt is located between Yidun eugeosyncline and Yajiang miogeosyncline in Sanjiang fold system.As one of the important precious metals metallogenic belt on Chuanxi plateau,it hosts dozens of gold deposits(spots) that are discovered in succession.Gold deposits such as Cuoa and Gala on the north,Ajialongwa in the middle,are all similar to Suoluogou on the south in geotectonic location,ore-hosting strata,ore-hosting lithology,wall rock alteration,magmatic rock,mineral compositions,geochemical characteristics,prospecting marks and prospecting method.Based on preliminary exploration of the geological characteristics,geochemical characteristics,geophysical characteristics and prospecting methods of Suoluogou type gold deposits,a geology-geochemistry-geophysics pro-specting model is established to guide prospecting work.Regional structure,ore-hosting strata,structural alteration belt are important geological prospecting marks to find Suoluogou type gold deposits;the geochemical prospecting mainly takes the form of stream sediment survey and soil geochemical survey,1∶200 000 stream sediment survey is the basis to determine prospecting target area,1∶25 000 and 1∶50 000 stream sediment survey is the basic method to narrow down prospecting target area,1∶10 000 and 1∶2 000 soil geochemical survey is used to determine the construction site;geophysics prospecting uses X-ray fluorescence spectrometry and comprehensive gravity,magnetic and electro methods.The metallogenic belt possesses the basics to be a super large-scale gold deposit,however,restricted by many factors,the potentials are not fully released.With increasing investment,the belt is expected to be a renowned metallogenic belt in the whole country.
Keywords:
Suoluogou type gold deposit;geological characteristics;prospecting model;Ganzi-Litang metallogenic belt;prospecting mark