山东胶西北矿集区和焦家金矿田成矿构造系统

胶西北矿集区金矿床主要受三山岛断裂、龙莱断裂和招平断裂3条主干断裂及其次级断裂控制，构成胶西北3条金矿带和一系列金矿田。断裂总体呈NNE走向，平面形态呈S形，多期活动特征明显，自主裂面向外依次出现黄铁绢英岩质碎裂岩、黄铁绢英岩化花岗质碎裂岩、黄铁绢英岩化花岗岩等矿化蚀变带。焦家金矿田受焦家断裂的控制，金矿床在平面上主要产于焦家断裂分枝复合、膨胀转折的部位；焦家断裂在剖面上呈上陡下缓的铲式特征，金矿床主要产于断裂倾角由陡变缓的转折点下部,主要矿体沿焦家断裂下盘分布，赋存于主裂面和与主裂面平行的一组缓倾斜裂隙中，远离主裂面逐渐出现一组陡倾的控矿裂隙。胶西北3条主要金矿控矿断裂构成了一条沿玲珑花岗岩与早前寒武纪地质体边界分布的大型伸展构造带。

Metallogenic structural system for Jiaojia gold field and Jiaoxibei gold deposits concentrated areas in Shandong Province, China

Gold deposits are under the control of the Sanshandao fracture,Longlai fracture,Zhaoping fracture,and other secondary fractures in eastern Shandong,China.These gold deposits constitute three ore zones and a series of ore fields.The main characteristic of the fractures is NNE strike,S type form,and multiple activities.Altered zone consists of ordinal beresitization cataclasite,beresitization granitic cataclasite,and beresitization granite from major fault.Jiaojia gold field is under the control of the Jiaoji...