摘要
吉南地区是我国古元古界出露较好的地区之一。区内地质构造复杂,矿产资源丰富。本文在前人资料基础上提出区内古元古代时期出现两大伸展构造,即早中期的辽吉裂谷系和末期的浑江裂陷槽。从断裂特征、火山活动、沉积建造等方面论证了这两个伸展构造的存在。这两个伸展构造中沉积了集安群及老岭群等地层,对区内金、铜、铅锌、硼等矿产的成矿具有重大意义。
The southern Jilin area is one of the well—developed Palaeoproterozoic regions in China. The geological structures is very complicated and there are rich mineral resources in the area. Based upon the data summed up by the former geological workers, this paper describes two extension structures. i. e. the early—middle Palaeoproteozoic Liaoji rift and the late Palaeoproterozoic Hunjiang aulacogen. According to the fracture characteristics, volcanic activities and sedimentary formation, we discuss two extension structures in which the Ji'an Group and Laoling Group are distributed, indicating important signification in mineralization of Au. Cu. Pb. Zn. and B.
出处
《吉林地质》
1993年第1期34-41,共8页
Jilin Geology
关键词
元古代
吉南地区
构造演化
Liao—Ji rift system Hunjiang aulaeogen The Palaeoproterozoic Ji'an area
