摘要
辽宁北部清河镇—吉林南部山城镇一带的一套变质地层最早被称为古元古代辽北“辽河群”,后来又称为早古生代清河镇群、太古宙沙河岩群+寒武纪开原岩群、中新元古代开原岩群等。最新研究证明,这是一套不同大地构造单元内的、不同时代、不同属性的地质体的拼合物。以清河断裂为界,北部属于陆缘活动带,可划分为新元古代西保安岩组、寒武纪佟家屯岩组和晚二叠世尖山子火山岩;南部为华北板块辽北清原地体,除太古代TTG岩系和少量的表壳岩外,还有一套变质石英砂岩大理岩变质火山岩为主的地层,即一个新的特殊岩石地层单位。本文作者提出新命名为古元古代芦家堡子岩组。
A metamorphic rocks series from Qinghe Town in northern Liaoning Province to Shancheng Town of southern Jilin Province was first called Early Palaeozoic ＂Liaohe Group＂ from northern Liaoning. After that, it was regarded as Early Palaeozoic Qinghezhen Group, Archaean Shahe Group-complex, Cambrian Kaiyuan Group-complex, and Mid-Late Proterozoic Kaiyuan Group- complex, etc. The up to date study testifies that it is a mixed object with different structural units and ages. By the Qinghe fault zone as boundary, the north part belongs to epicontinental active zone of Northern China Platform composed of Late Proterozoic Xibaoan Formation-complex, Cambrian Tongjiatun Formation-complex and Late Permian Jianshanzi volcanic rocks; while the south part is the Qingyuan terrain consisting of the Archaeozoic TTG, a few of crustal rocks, and a suit of metamorphic rocks composed of metamorphic silicarenites, marbles and green-schists. The latter unit is as a special lithostratigraphic unit—which is proposed to name as Early Proterozoic Lujiapuzi Formationcomplex by the authors.
出处
《世界地质》
CAS
CSCD
2006年第3期213-220,244,共9页
World Geology
基金
中国地质调查局1:25万辽源市幅项目(200113000047)
关键词
芦家堡子岩组
古元古代
清原一开原
辽北
Lujiapuzi Formation-complex
Early Proterozoic
Qingyuan-Kaiyuan
northern LiaoningProvince
