印度尼西亚卢瓦斯砂金矿床地质特征  

On geological properties of Luas gold placer deposit in Indonesia

作　　者：薛卫冲[1] 徐强[1] 柯霖[1] 

机构地区：[1]江苏省有色金属华东地质勘查局,江苏南京210007

出　　处：《地质学刊》2014年第2期314-318,共5页Journal of Geology

摘　　要：卢瓦斯砂金矿位于印度尼西亚共和国苏门答腊岛东南部卢瓦斯河道及一侧阶地。矿区所处大地构造位置属喜马拉雅—马来西亚—苏门答腊火山活动带之东段。依据该砂金矿床的成矿地貌特征、地质特征、重砂矿物组合,初步认定该矿属近源型冲积型砂金矿,其砂金的物质来源于萨温河上游含金地质体,特别是火山碎屑岩中的含金石英脉和硅化脉。该砂金矿聚集于河道河漫滩及一级、二级河谷阶地中的泥、砂、砾等现代沉积物中。矿体产状受河流及两侧地形、地貌控制。Luas gold deposit was located on the Luas River and terraces on its side which on the southeast of Sumatra in Indonesia. Its tectonic position was located on the eastern zone of the Himalayan-Malaysia-Sumatra volcanic belt. Based on geomorphology,geology,heavy mineral composition of the placer,the deposit was roughly defined as alluvial placer mine of near source,which might come from the gold-bearing geological body in the upper Savannah River,especially auriferous quartz veins and silicified veins in pyroclastic crumbs rocks. The gold placer was accumulated in mud,sand,gravel and other modern sediments in the river floodplain and first and second valley terraces. The orebody was controlled by rivers and the surrounding topography.

关 键 词：砂金矿 地貌特征 地质特征 卢瓦斯河 印度尼西亚 

分 类 号：P618.51[天文地球—矿床学]