| 甘肃北山白山堂铜矿外围找矿靶区地球化学评价方法示范 |
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| 引用本文：马生明,朱立新,唐世新,徐明钻.2013.甘肃北山白山堂铜矿外围找矿靶区地球化学评价方法示范[J].地球学报,34(3):338-346. |
| DOI：10.3975/cagsb.2013.03.09 |
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| 基金项目:国土资源部公益性行业科研专项项目(编号: 201111008)；中国地质调查局地质调查项目(编号: 1212010813057) |
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| 中文摘要:在甘肃北山白山堂铜矿及其外围, 以1:20万营盘幅区域化探数据为基础, 探讨了综合利用富集贫化两类指标形成的正、负异常圈定找矿靶区并进行靶区评价的可行性示范研究。结果表明, 在1:20万区域尺度上, 已知白山堂铜矿产出位置出现了成矿元素(Cu)及伴生元素(Zn、Au、Ag、As、Sb、Mo)、常量组分(Fe2O3、MgO)的正异常和亲石分散元素(Ba、Sr)、常量组分(Al2O3、Na2O)的负异常, 构成白山堂铜矿整体异常结构模式。以是否出现异常结构模式为标准, 利用岩石裂隙充填物测量或岩屑测量结果, 对白山堂铜矿外围出现的地球化学异常成矿前景进行了评价。根据示范研究结果认为, 利用异常结构模式进行找矿靶区评价是行之有效的, 较单纯利用成矿元素及伴生元素异常进行靶区评价证据更系统、充分。 |
| 中文关键词:白山堂铜矿 异常结构模式 靶区评价 地球化学方法示范 |
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| Geochemical Evaluation Method for Prospecting Target around the Baishantang Copper Deposit of Beishan Area, Gansu |
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| Abstract:Based on the stream sediment data obtained from 1:200,000 geochemical survey in Yingpan of Beishan area, this paper has tentatively discussed the feasibility of applying geochemical anomaly structure comprising positive anomalies of enriched elements and negative anomalies of depleted elements to evaluating the prospecting target. The results demonstrate that geochemical anomaly structures of the Baishantang copper deposit are formed by positive anomalies of enriched elements and negative anomalies of depleted elements. Enriched elements include metallogenic element (Cu), mineralizing accompanying elements (Zn, Au, Ag, As, Sb, Mo), and major elements (Fe2O3, MgO), whereas depleted elements include trace elements (Ba, Sr) and major elements (Al2O3, Na2O). Based on the tested anomaly structure as well as the results of fracture survey and debris survey, the authors evaluated geochemical anomalies in Baishantang area. It is shown that making use of geochemical anomaly structure could effectively evaluate the prospecting target. |
| keywords:Baishantang copper deposit anomaly structure model prospecting target evaluation geochemical method demonstration |
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