四川甘孜—理塘断裂带中段阿加隆洼金矿床地球化学找矿模式  

Geochemical model for mineral prospecting of the Ajialongwa gold deposit in the central segment of the Garzê-Litang fault zone in Sichuan

作　　者：杨伟寿 胡正文[1] 何德润 

机构地区：[1]四川省冶金地质勘查局六0五大队,四川彭山县620860

出　　处：《中国地质》2007年第1期123-131,共9页Geology in China

摘　　要：四川甘孜—理塘断裂带是川西高原重要成矿区(带)之一。区域水系沉积物测量和早期异常查证结果,在阿加隆洼、雄龙西、马拢等3处高浓度金异常部位发现了有较大找矿前景的岩金矿产地。为进一步挖掘区域化探资料所蕴含的找矿信息,后期研究工作以水系沉积物金异常为单元,结合区域找矿新进展和新认识,对异常进行了再评价;以采样方格为单元,进行了地球化学统计成矿信息预测和靶区筛选;以阿加隆洼金矿床(含外围)为重点研究对象,初步建立了水系沉积物—土壤—岩石地球化学找矿模式,进行了找矿预测。经对矿区进行少量钻探工程验证后,获得了明显的找矿效果,对外围部分靶区查证后,在原有分散流弱异常地段,也相继发现了宰乌隆洼、阿达隆2处有较大找矿前景的岩金矿产地,拓展了找矿空间。The Garze-Litang fault zone in Sichuan is one of the important metallogenic regions （zones） on the western Sichuan Plateau. The regional stream sediment survey and early-stage checks of anomalies have revealed rock gold occurrences with larger ore prospects at three gold anomaly sites with high gold concentrations, namely, Ajialongwa, Xionglongxi and Malong. In order to further find out ore information contained in the regional geochemical data, gold anomalies in the stream sediments were taken as the unit in the research work at the late stage and reevaluated in combination of new progress and knowledge in regional mineral prospecting; geochemical statistics and mineralization information prediction were made and target areas were screened with sampling grids as the unit; and a stream-soil-rock geochemical model for mineral prospecting was preliminarily constructed with the Ajialongwa gold deposit （including its surroundings） as the key target of research and ore deposit prediction was conducted. Through checks of the ore district by small amount of drilling, significant mineral prospecting results were obtained. Then after checking part of target areas in the surrounding areas, the Zhaiwulongwa and Adalong rock gold occurrences with larger ore prospects were found at places with weak dispersion flow anomalies. Thus the mineral spaces have been expanded.

关 键 词：甘孜-理塘断裂带 蛇绿混杂岩 微细粒浸染型金矿 水系沉积物异常 土壤吸附汞异常 指示元素分带序列 地球化学找矿模式 四川 

分 类 号：P618.51[天文地球—矿床学]