四川省木里县某金矿地质特征及找矿方向分析

Geological Features and Range of Reconnaissance of A Au Deposit in Muli,Sichuan

矿区处于中国特提斯成矿域,西南三江构造火成岩带之义敦-中甸岛弧多金属成矿带,稻城邓波-木里菜园子Cu-Au-Pb-Zn-Ag矿远景区,周边已发现多个大中型金矿床,具有较好的找矿潜力。矿区存在多期构造,成矿物质来源较丰富,近南北向断层与背斜轴部、近东西向矿化蚀变破碎带在矿区交汇,具有较好的成矿地质条件;矿区的地球化学异常经过工程验证,共圈定金矿体8个,金矿化体7个,证实为矿致异常,其中Ⅰ号矿体规模最大,最具工业价值,矿体两端被浮土掩盖,长度大于170m,平均厚度2.25m,Au平均品位3.8×10^(-6),银平均品位50.44×10^(-6),铅平均品位2.59%,是一个金多金属矿体。矿区南部尚有较好的水系沉积物异常和土壤异常未进行验证,加强研究和勘查投入,有望取得较大的找矿突破。

The studied ore district lies in the Dengbo,Dacheng-Caiyuanzi,Muli Cu-Au-Pb-Zn-Ag metallogenic prospective area of the Yidun-Zhongdian island arc polymetallic metallogenic belt of the Tethyan metallogenic domain.Many large and medium-sized gold deposits have been found in the surrounding area.Multiphase tectonic activity and rich ore material source exist in the ore district.The intersection of nearly longitudinal fault and anticlinal axis with nearly latitudinalmineralized altered fracture zoneoccur in the ore district.8 Au orebodies and 7 Au mineralized bodies are delineated.The orebodyⅠis 170 m long with an average thickness of 2.25 m and average grades of 3.8 g/t Au,50.44 g/d Ag and 2.59%Pb.A good stream sediment anomaly and soil geochemical anomaly occur in the south of the ore district where it is expected to make a great breakthrough in prospecting.