从原岩建造角度探讨辽河群的形成环境  

The original formation-based discussion on Liaohe Group's environment

作　　者：翟富荣 梁帅 郭洪方 

机构地区：[1]辽宁省地质矿产研究院,沈阳110032 [2]辽宁省地质矿产调查院,沈阳110032 [3]辽宁省地质勘查院,辽宁大连116100

出　　处：《地质找矿论丛》2016年第4期550-554,共5页Contributions to Geology and Mineral Resources Research

基　　金：<辽宁省区域地质志>修编项目"辽宁省地质系列图件编制与综合研究"(编号:基[2008]01-20-01)资助

摘　　要：文章通过对辽河群上百条实测剖面中岩石类型进行了加权平均统计,得出了辽河群中各种岩石类型的百分含量;对辽河群中已有的上千组岩石化学数据进行了筛选,选取具有代表性的94组数据,用以对辽河群原岩建造恢复和形成构造环境的讨论。认为辽河群的原岩建造为巨厚的陆源沉积碎屑岩—内源沉积碳酸盐岩(夹少量火山岩)建造,具有典型的大陆架沉积特征;这在威尔逊旋回中属于成年期洋盆(大西洋)阶段所独具的沉积特征,这个洋盆暂且称之为辽吉古元古洋。In this paper, the author make a weighted average statistics of the rock types in about one hundred sections through Liaohe Group obtaining the percentage of each rock type. 94 representatives are screened out from about one thousand petro-geochemical data sets to reconstruct the original formation and discuss the tectonic environment of sedimentation. The data show that original Liaohe Group is a thick terrigenous clastic sedimentary rock-intrabasin sedimentary carbonate rock （interclated with a little volcanic rock） sequence characterized by typical continental shelf sedimentation and adult ocean basin （the Atlantic） sedimentary stage of Wilson cycle. The ocean basin of Liaohe group is called here Liaoji Paleo- proterozoic Ocean.

关 键 词：辽河群 古环境 沉积建造 陆源碎屑岩 内源碳酸盐岩 大陆架型沉积 辽宁省 

分 类 号：P531[天文地球—古生物学与地层学] P534.3[天文地球—地质学]