幔枝构造对胶东地区金矿分布的控制

胶东地区是我国现今最重要的金矿集中区，金矿的产出总体受胶东地区几条主干断裂构造的控制。纵观胶东地区金矿数量及规模，发现胶东地区金矿分布存在不均衡性，表现为大型、特大型金矿床相对集中在胶西北地区，而胶东南地区金矿规模则相对较小。结合胶东地区区域构造背景、地层出露及构造展布特征，认为胶东地区金矿分布不均衡受幔枝构造控制，由于胶西北地处华北东部地幔热柱中心部位，自然成为最有利的成矿集中区。

Effects of Mantle Branch Structure on the Distribution of Gold Deposits in Jiaodong Area

Jiaodong is one of the most important gold producing area of China, the output of gold in Jiaodong area is generally controlled by some specific faults.Throughout the number and size of gold deposits in Jiaodong area, we discovered the distribution of gold deposits in Jiaodong area is uneven,large and superlarge gold deposits basically focus on northwestern Jiaodong area, the scale of gold deposits in southeast of Jiaodong area is relatively small.Combined with the regional tectonic background of Jiaodong area,the outcrop of strata and the characteristics of tectonic distribution, we consider that the uneven distribution of gold deposits in Jiaodong area is controlled by mantle branch structure, due to the northwest of Jiaodong area located in the center of mantle plume in eastern of North China, it becomes the most advantageous gold metallogenic concentration area.