摘要
宋家沟金矿床是胶东地区新近发现的金矿床之一，矿体赋存在胶莱盆地东北缘拆离断层带上盘的莱阳组砾岩中，为区内火山活动前期在大气水的参与下形成的蚀变砾岩型金矿床。初步的类比研究表明，宋家沟式金矿不同于传统意义上的砾岩型金矿，也不同于胶东地区的玲珑式和焦家式金矿床，而与南非兰德金矿床具有一定的可比性，是胶东地区新发现的金矿类型。其找矿远景巨大。
The Songjiagou gold deposit was newly discovered in the Jiaolai Basin in recent years.It occurs in conglomerate of the Early Cretaceous Laiyang Group on the margin of the Jiaolai Basin, and was formed in detached faults before a volcanic period with involvement of meteoric water.The host rocks have been extensively subjected to pyritization,silicification,sericitization and carbonatization.Individual ore－ body has the maximum length of 400 m,oblique extension of 600～ 700 m and gold grade of (1～ 15)× 10－ 6.Comparative studies show that the Songjiagou type gold deposit,an altered conglomerate type gold deposit,is different from traditional conglomerate type gold deposits,Jiaojia type gold deposits and Linglong type gold deposits in the Jiaodong Block,but bears a resemblance to the Witwatersland gold deposit in South Africa to some extent.It is a new type of gold deposit in the Jiaodong Block,and is expected to be superlarge one.
出处
《大地构造与成矿学》
EI
CAS
CSCD
2000年第3期250-257,共8页
Geotectonica et Metallogenia
基金
中国科学院创新重大项目!(编号KZCX1Y0301)
"九五"黄金重大项目!(KZ951A14040202)资助.
关键词
宋家沟金矿
胶莱盆地
地质特征
蚀变砾岩型
成因
Songjiagou gold deposit
Jiaolai Basin
geological characteristics
altered conglomerate type
