新疆阿合奇地区石炭系巴什索贡组珊瑚化石及其地质意义  

Carboniferous Bashisuogong Formation Coral Fossils and Their Geological Significances in Akqi Area,Xinjiang

作　　者：张新勇[1] 张雄华[2] 赵志刚[1] 戚静洁 钱春东 杨宝忠[2] 

机构地区：[1]中国人民武装警察部队黄金第七支队,山东烟台264004 [2]中国地质大学(武汉)地球科学学院,武汉430074

出　　处：《地质科技情报》2017年第1期14-19,共6页Geological Science and Technology Information

基　　金：中国地质调查局项目"西南天山柯坪地区六幅地质矿产综合调查"(1212011504201);"新疆1:5万卡克;色帕巴衣幅区域地质矿产调查"(1212011220661)

摘　　要：塔里木盆地西北缘阿合奇地区石炭系巴什索贡组研究程度较低,鲜有古生物化石的报道,其精确时代一直没有确定。在该套地层中发现四射珊瑚化石共计10属13种,床板珊瑚5属8种。其中四射珊瑚中主要分子有Kueichouphyllum,Palaeosmilia,Dibunophyllum,Arachnolasma,Lithostrotion,根据珊瑚的垂向分布,建立了Kueichouphyllum-Palaeosmilia-Dibunophyllum组合带,该组合带可与前人在华南地区早石炭世地层中建立的Yuanophyllum带进行对比,也能与邻区及中国其他地方相同时期的珊瑚组合对比,进而确定其精确时代为石炭纪密西西比亚纪维宪期至德坞期早期。对该珊瑚动物群的生物古地理研究表明,该动物群具明显的特提斯生物大区和中国北方大区的珊瑚分子特征,属二者的混生带。Few studies were conducted on the Bashisuogong Formation of Akqi area in the northwest margin of Tarim Basin,and in particular,there are rarely reports about paleontological fossils.This makes it hard to determine the exact geological age.The Rugose Coral fossils were identified to contain 10 genera and 13 species and the Tabulata Coral fossils were identified to belong to 5genera and 8species.The Rugose Corals mainly include：Kueichouphyllum,Palaeosmilia,Dibunophyllum,Arachnolasma and Lithostrotion.On the basis of the vertical distribution of the corals,coral assemblage are established：Kueichouphyllum-Palaeosmilia-Dibunophyllum,which can be compared to Yuanophyllum Zone established by some researchers in south China,and can be well compared to the contemporary coral assemblage in the other areas of China.Therefore,the exact geological time should be Mississippian Period（Visean-Early Dewuan）of Carboniferous.The studies about the paleobiogeography of the corals show that these corals have features of Tethyan corals and the fossils in the northern China region.These corals belong to the mixed biozones of both region.

关 键 词：新疆阿合奇地区 石炭纪 巴什索贡组 珊瑚化石 

分 类 号：Q911.2[天文地球—古生物学与地层学]