新疆塔里木盆地哈拉奇地区晚石炭世—早二叠世哈拉奇组的建立  

The establishment of the Late CarboniferousEarly Permian Karaqi Formation in Karaqi area on the northwestern margin of Tarim basin,Xinjiang

作　　者：张新勇[1,2] 刘晓煌[2] 李保飞 张雄华[4] 刘龙龙[2,3] 牛树银[5] 寇晓虎[4] 杨宝忠[4] 

机构地区：[1]中国人民武装警察部队警种学院,北京102201 [2]中国人民武装警察部队黄金第七支队,山东烟台264004 [3]中国地质大学(北京),北京100083 [4]中国地质大学(武汉)地球科学学院,湖北武汉430074 [5]石家庄经济学院,河北石家庄050031

出　　处：《地质通报》2014年第1期9-18,共10页Geological Bulletin of China

基　　金：中国地质调查局项目(编号:1212011120495;1212011220661)

摘　　要：哈拉奇组为新疆阿合奇县开展1∶5万区域地质矿产调查工作时建立的岩石地层单位,分布在新疆阿合奇县哈拉奇地区北部,主要为一套深水碳酸盐沉积,与该区南部属碳酸盐台地沉积的康克林组在岩性、岩石组合及古生物组合上形成明显的差别。通过对该组重力流成因的生物屑砾屑灰岩中古生物化石的研究,确定其带为Triticites带和Pseudoschwagerina带,进而确定该组地质时代为晚石炭世—早二叠世,与南区康克林组为同时异相沉积。哈拉奇组的建立完善了该地区上石炭统—下二叠统的地层系统,确定了该地区晚石炭世—早二叠世台地边缘斜坡相的存在,对塔西北地区晚石炭世—早二叠世岩相古地理研究具有重要意义。During the 1 ： 50000 regional geological and mineral resources survey in Akqi County, Karaqi Formation was established as a lithostratigraphic unit. Karaqi Formation is mainly composed of deep-water carbonate sediments, obviously much different in lithol- ogy, rock assemblage and paleontological assemblage from Kangkelin Formation distributed in south area and comprising carbonate platform sediments. It is indicated that the age of Karaqi Formation should be Late Carboniferous-Early Permian, as evidenced by an analysis of paleontology and Triticites and Pseudoschwagerina Zones built here. Therefore, the two formations distributed in different areas should belong to simultaneous sedimentation with different facies. The establishment ot Karaqi Formation taczhtates the Im- provement of the Upper Carboniferous-Lower Permian stratigraphic system and a/so confirms the existence of Upper Carboniferous- Lower Permian platform margin slope zone in this area. The results obtained by the authors are of great importance for the study of the Upper Carboniferous-Lower Permian lithofacies paleogeography in northwestern Tarim region.

关 键 词：晚石炭世-早二叠世 哈拉奇组 台地边缘斜坡 塔西北地区 

分 类 号：P534.45[天文地球—古生物学与地层学] P534.46[天文地球—地质学]