摘要
龙口市姚家金矿位于胶东半岛西北部著名的焦家金矿成矿带北段,区域内以北东—北北东向断裂构造发育为突出特点。区域性的北东向压扭性断裂及其派生的次级断裂构造系统是矿床赋存的重要构造标志;新元古代震旦期玲珑序列和中生代燕山早期郭家岭序列也与之密切相关,并由此形成了东西成带,北东成串(沿构造)的成矿规律;破碎蚀变岩带中钾化、硅化、黄铁绢英岩化等蚀变以及石英、多金属硫化物的发育也是矿床形成的重要标志。通过对矿床地质特征的研究,认为该矿床成因类型属深熔浅成岩浆中温热液型金矿床。
Yaojia gold deposit in Longkou is located in the north of the famous Jiaojia Gold Metallogenic Belt in the northwest area of Jiaodong Peninsula, where the distinctive characteristicis the were well-developed NE- to NNE-trending fault structures. In this area, the NE compressive-shearing fracture and its derived secondary tectonic system are important structure sign of the deposit occurrence; Linglong Super-unit of Neoproterozoic Sinian Period and Guojialing Super-unit of Mesozoic Yanshanian Period are also related to the gold deposit, forming the metallogenic regularity of “ belts in west-east, trains in north-south （along the structures）”; At the same time, the potassic altheration, siliciifcation, pyritephyllic alteration etc. in the broken altered zone and the development of quartz and polymetallic sulifde are are important ore prospecting indicators. Based on the study of geological characteristics, it is considered that the genetic type of ore deposit is belonged to the middle-temperature hydrothernal gold deposit in deep hypabyssal magma.
出处
《吉林地质》
2016年第1期36-40,57,共6页
Jilin Geology
关键词
姚家金矿
蚀变
地质特征
矿床成因
Yaojia gold deposit
alternation
geological characteristics
genetic type of ore deposit
