吉林省延边地区砂金地质特征  

Geological features of placer gold in Yanbian area of Jilin Province

作　　者：柴雨[1] 那丹妮[1] 苏循新 CHAI YU NA Dan-ni SU Xun-xin(In formation Centre of Geology and Mineral Resources of Jilin Province, Changchun 130061, Jilin, China Geological Museum of Heilongjiang Province, Haerbin 150090, Heilongjiang, China)

机构地区：[1]吉林省地矿信息中心,吉林长春130061 [2]黑龙江省地质博物馆,黑龙江哈尔滨150090

出　　处：《吉林地质》2016年第3期54-57,共4页Jilin Geology

摘　　要：首先详细地介绍了延边地区砂金分布与地貌、水系关系。在地貌上,砂金矿的分布受区域地貌影响,但主要是受微地貌,尤其河谷地貌的控制,砂金一般多富集在冲积层的下部或底部;一般分布在河床、边滩和阶地中,碎屑物分选性相对较好,成层性也较明显地段。在水系上,大部分砂金矿均分布在Ⅰ—Ⅱ级水系的中上游,水系的汇水面积大,流程长者含金性好。最后阐述了砂金的物质来源、成矿条件及成因类型。In this paper, the author introduces the relationship between distribution of placer gold and landform, water system in Yanbian area. In the landform, the distribution of placer gold mine is influenced by the regional landform, mainly is micro topography, especially the river valley landform. The placer gold general enrich in the lower part or the bottom of alluvium, in the riverbed, marginal bank and terraces, clastic sorting is relatively good, and stratifi cation is more obvious. In the water system, most of placer gold mine distributed in the middle and upper reaches of grade Ⅰ- Ⅱ water system, the larger catchment area and longer flow path, the better gold bearing property. Finally the material source, mineralization conditions and genetic types of placer gold are expounded.

关 键 词：砂金矿:地貌 水系 分布规律 延边地区 

分 类 号：P618.51[天文地球—矿床学]