摘要
大巩山金矿床在大地构造上处于中朝地块东南缘的蚌埠隆起东段,郯庐断裂带的两条次级断裂———朱顶-石门山断裂和五河-红心铺断裂所夹持的部位.矿区内出露五河群最下部的西堆组,并构成蚌埠复背斜的核部,断裂有北北东向、南北向、北西西向和北东向4组.南北向断裂在宏观上控制金矿体的产状和规模.向西缓倾的南北向断裂控制石英脉型金矿体的发育和产出,而向东陡倾的南北向断裂控制构造蚀变岩型金矿体的产出,这是与不同时期南北向断裂成生演化和岩浆活动作用密切相关的,也与该区及邻区成矿年代学研究成果相一致.
The Dagongshan gold deposit,tectonically located at the eastern part of Bangbu anticlinorium of NBC,is held between the two secondary faults,Zhuding Shimenshan fault and Wuhe Hongxingpu fault,of the famous Tan Lu fault zone.There outcrop the metamorphic rocks of Neoarchean Xigudui formation,forming the core of the Bangbu anticlinorium.There developed NNE trending,S N trending,NWW trending and NE trending faults in the ore district.The S N trending faults macroscopically control over the attitude,size and type of gold ore bodies.There occurs two types gold ore bodies.One is quartz vein type controlled by the S N trending faults dipping to west with low middle angle.The other is tectono alterated rock type controlled by S N trending faults with mid high angle dipping to east.The ore forming of the two types of gold deposits are related to the evolution of the S N trending faults and magmatic activity.It is identical with the result of chronological study on the gold deposits in the area.
出处
《地质与资源》
CAS
2004年第3期143-147,共5页
Geology and Resources
