西藏多不杂地区区域化探扫面试点测量及其外围找矿前景地球化学预测  

Regional geochemical survey and prospecting prognosis of the Duobuza region and its peripheral areas in Tibet

作　　者：杨少平[1] 刘华忠[1] 刘应汉[1] 张学君 张华[1] 孔牧[1] 

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《物探与化探》2017年第2期203-209,共7页Geophysical and Geochemical Exploration

基　　金：中国地质调查局地质调查项目(200220130001;12120113101200)

摘　　要：选择地处羌塘高原腹地的班公湖—怒江成矿带西段核心区段的多不杂地区,开展了区域化探扫面试点测量。水系沉积物不同采样粒级成果对比研究表明,-10^+40目是该区的最佳采样粒级;抽稀试验研究表明,1个点/4 km^2的采样密度对于找寻大型以上矿床是有效的。根据-10^+40目水系沉积物试点测量结果,预测在多不杂矿区外围具有找到大型以上规模铜矿床的潜力,特别是在荣那沟上游一带。The Buobuza area selected for the study is located in the Qiangtang Plateau hinterland in the western part of the Bangong CoNujiang River metallogenic belt. The authors carried out an overall survey of regional geochemical exploration. A comparison of different grades of stream sediment samples shows that-10 ~ ＋ 40 mesh is the best sampling fraction here; rarefied test study shows that more than 1/4 km^2 sampling density is valid for discovering a large deposit. According to the-10 ~ ＋40 mesh stream sediment results of the overall survey,the authors predict that the periphery of the Duobuza ore district has the potential to find large or superlarge copper deposits,particularly in the upper reaches of the Rongna ditch.

关 键 词：羌塘高原 多不杂铜矿区 区域化探扫面 试点测量 找矿前景预测 

分 类 号：P632[天文地球—地质矿产勘探]