区域成矿地质背景

REGIONAL ORE-FORMING BACKGROUND

研究区位于胶北地体与胶莱盆地之间。区内地壳经历了陆核形成，元古代地壳沉降，褶皱回返；古生代－中生代中期地壳固化稳定及中生代后期地壳破裂，胶北地体隆起风化剥蚀，胶南地体沉降接受沉积，在其盆地底部陆相湖泊还原相中形成富金的含炭岩系。燕山晚期为区内主要金成矿期，分别在以胶东群为基体产生的重熔花岗岩内外接触带及下白垩统莱阳群中形成金矿。

The researched region lies between Jiao Bemassif and Jiao Nan massif In the region,the earth's cruSt has experienced continental nucleus formation, earth's crust subsidence and folding inversion of Proterozoic Era, as a result of solidifying stabilization of the middle age of Mesozoic Era and the crustal fracture in the late age of Mesozoic Era.Jiao Be upwarping body sustains weathering and denudation; Jiao Nan body settles to accept sediment, at the bottom of tile basin deposited high gold carbonaceous elastic rock in continental factes in condition of reduction. of Lakefacies. Late epoch of Yan Shan Movement is main epoch of gold mineralization in the region, gold deposits were formed separately in contact Zone of anatexis granite produced in Jiao Dong group and in Lai Yang group of the Lower Series of Cretaceous system.