新疆柯坪、乌什的若干■类化石及其地质学意义  

New Materials of Fusulinacean from Xinjiang and Their Significance in Structural Geology

作　　者：杨湘宁[1] 贾东[1] 卢华复[1] 

机构地区：[1]南京大学地球科学系,江苏南京210093

出　　处：《高校地质学报》2001年第4期399-407,共9页Geological Journal of China Universities

基　　金：国家自然科学基金重点项目 (批准号 :49832 0 40 )

摘　　要：根据新疆柯坪、乌什的类化石新材料 ,结合以往有关类生物地层学及类古地理分布的资料 ,分析了塔里木地区二叠纪类化石组合特征。研究结果显示 ,塔里木盆地早二叠世类动物群与我国西南地区同期类动物群面貌非常相似 ,并具有一些目前仅发现于云南、贵州和广西的地方性种类 ,表明塔里木板块与华南板块在这一时期应处于相同的纬度 ,且两者相对位置似应比较接近。但是 ,这一结论与有关古地磁资料不尽吻合。针对这一问题 ,结合有关石炭—二叠纪微板块运动及古洋流运动方向的研究成果 ,对塔里木。Some new materials of the Early Permian fusulinacean from Keping and Wushi of Xinjiang are described, which provided further information for the analysis of fusulinacean biostratigraphy and paleobiogeograhy of the Permian. The study shows that the fusulinacean fauna of the Early Permian in Tarim basin is very similar to that of the same age in the southwestern China, particularly in sharing some endemic species of Robustoschwagerina, which in the past have only been found in Guizhou, Guangxi and Yunnan provinces. The similarity of fusulinacean faunas indicates that the Tarim plate and southwestern China plate probably were at the similar latitudes in other geographically. However, this conclusion from the fusulinacean study is inconsistent with the paleomagnetic data, which suggested a N 30.6° for Trim plate and a S 7.0° for the upper Yangtze River plate in the Early Permian. Based on recent studies on the movement of micro plates and the direction of plaeo circulation of Tethys during the Carbon Permian, the authors made a preliminary discussion on the possible mechanism that may cause the similarity of fusulinacean faunas between the two apart plates. It is suggested that the counter clockwise circulation of the paleo Tethys could possibly carry those fusulinacean species originally endemic to the South China plate northwards to the ocean regions adjacent to the Tarim plate. Nevertheless, this hypothesis should be tested by further paleontologic and stratigraphic studies.

关 键 词：TING类化石 二叠纪 塔里木盆地 新疆 华南板块 古地磁资料 

分 类 号：Q915.811.1[天文地球—古生物学与地层学]