摘要
邓格庄大型石英脉型金矿，分布于燕山期昆嵛山花岗岩体内金牛山断裂带次级断裂中。成矿年龄１１８×１０６ａ，它比容矿岩体冷凝至３５０℃时还晚１２×１０６ａ。成矿深度小于１ｋｍ（约０．７５ｋｍ），而容矿岩体的定位深度大于１３ｋｍ，它们的定位深度差大于１２ｋｍ。成矿流体来自地壳深部，通过水－岩反应又从容矿岩体中萃取一部分金。
The Denggezhuang large size quartz vein type gold deposit lies in the second order faults of the Jinniushan shear zone within the Yanshanian Kunyushan granite.The ore forming fluids are characterized by δ D -77‰～-89‰,and δ 18 O H 2O +2‰￣+3 2‰;the ore forming temperature and pressure are 150￣350 ℃ and 400×10 5 Pa respectively.The emplacement age of the gold deposit has been determined to be 118×10 6 a.The time interval between the formation of the gold deposit and the cooling of the host rock to 350 ℃ is about 12×10 6 a.The emplacement of the gold deposit occurred less than 1km (about 0 75 km)in depth,but the emplacement of their host rock took place at a depth of over 13 km,suggesting a depth difference of >12 km.The ore forming fluids came from the depth of the crust and then extracted some gold from the host rocks through water rock reaction.It is thus concluded that the deposit is of the traditionalpostmagmatic type.
出处
《矿床地质》
CAS
CSCD
北大核心
1997年第3期204-213,共10页
Mineral Deposits
基金
地矿部"八五"科技攻关项目
关键词
地球化学
热液成因
矿床成因
金矿床
gold deposit,geochemistry,genesis,Shandong,Denggezhuang
