青海都兰县双雪包银多金属矿地球化学特征及找矿前景探讨  

Geochemical characteristics and prospecting potential of Shuangxuebao silver polymetallic deposit in Dulan County,Qinghai Province

作　　者：石延林 谢升浪 何财福 张伟 吕文龙 郑才贤 SHI Yanlin;XIE Shenglang;HE Caifu;ZHANG Wei;LÜ Wenlong;ZHENG Caixian(The Fourth Non-ferrous Geological Survey Institute of Qinghai Province,Xining 810000,Qinghai,China)

机构地区：[1]青海省有色第四地质勘查院,青海西宁810000

出　　处：《矿产勘查》2020年第10期2149-2156,共8页Mineral Exploration

基　　金：青海省地质勘查基金项目(编号:2020021100kc067)资助。

摘　　要：近年来的化探找矿实例证明,化探在干旱高山景观区是行之有效的找矿方法,以1∶2.5万地球化学测量对1∶5万水系沉积物异常进行检查,可达到快速、经济、准确圈定矿化范围的目的。该文通过对青海都兰县双雪包地区1∶5万水系沉积物AS14号异常的分析研究,利用1∶2.5万地球化学测量对该异常较好的分解和重现,圈出综合异常14处,异常总体分布受F3断裂构造控制;重点对GA2和GA5等2个1∶2.5万地球化学测量综合异常进行检查,发现矿化破碎蚀变带2条,通过地表工程揭露,圈出AgPbZn矿体2条,矿体与异常中心位置套合,异常为矿致异常。综合分析双雪包地区的找矿前景,为下一步工作提供参考。In recent years,geochemical prospecting has been proved to be an effective method in arid alpine landscape area. The geochemical survey at the scale of 1 ∶ 25 000 can be used to detect the anomaly of stream sediment at the scale of 1 ∶ 50000 so as to quickly,economically and accurately delineate the scope of mineralization. In this paper,through research and analysis of the stream sediment anomaly AS14 in Shuangxuebao area,Dulan county,Using 1 ∶ 25000 geochemical survey to better decompose and reproduce the anomaly,14 comprehensive anomalies are delineated,and the overall distribution of the anomaly is controlled by F3 fault structure;The Comprehensive geochemical anomalies of GA2 and GA5 with a scale of 1 ∶ 25000 were examined,and two mineralized cataclastic alteration zones were found. Through surface engineering exposure,two AgPbZn orebodies are delineated,and the orebodies are overlapped with the center of the anomaly,indicating that the anomaly is caused by ore;Based on this,the prospecting prospect of Shuangxuebao area is analyzed comprehensively,and the reference for the next work is provided.

关 键 词：银多金属矿 1.5万地球化学测量 矿致异常 岩浆活动 控矿构造 双雪包 青海 

分 类 号：P618.52[天文地球—矿床学]