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依据牙形刺确定的吉林省大河深组的时代

THE AGE OF THE DAHESHEN FORMATION IN JILIN PROVINCE BASED ON CONODONTS

【Author in Chinese】 周晓东李东津王光奇孙喜庆王成源

【Author】 ZHOU Xiao-dong;LI Dong-jin;WANG Guang-qi;SUN Xi-qing;WANG Cheng-yuan;Regional Survey of Geology and Mineral Resources of Jilin Province;Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences;College of Paleontology,Shenyang Normal University;

【Institution】 吉林省区域地质矿产调查所中国科学院南京地质古生物研究所沈阳师范大学古生物学院

【Abstract in Chinese】 吉林桦甸大河深组的时代长期以来没有得到很好的确认,本文作者系统地采集了大河深命名剖面的牙形刺样品,发现了一些牙形刺,包括Mesogondolella aserrata,Mesogondolella daheshenensis sp.nov.Wang,Mesogondolella subgracilis sp.nov.Wang,Mesogondolellasp.B,Mesogondolellasp.X,依据Mesogondolella aserrata的存在,大河深组的时代可以确定为中二叠世沃德期,大致可以与内蒙古的哲斯组和吉林九台的范家屯组对比,但三个组的顶界的时代可能有所不同。美国瓜德鲁普统的罗德阶和沃德阶目前只各有一个牙形刺带,需再精细研究,有可能划分出更多的牙形刺带。

【Abstract】 The age of the Dahesen Formation in Huadian County,Jilin Province,is debated for a long time. The majority authors assigned this formation to Early Permian.The present authors systematically collected conodont samples from named-section of this formation,and found some conodonts including Mesogondolella aserrata,Mesogondolella daheshenensis sp.nov.Wang,Mesogondolella subgracilis sp.nov.Wang,Mesogondolella sp.B, Mesogondolellasp.X.Based on mainly the presence of Mesogondolella aserrata,the age of the Daheshen Formation should be assigned to Wordian Stage of Middle Permian.It could be roughly correlated with the Zhesi Formation in Inner Mongolia and the Fanjiatun Formation in north part to Changchun.The upper limits of these three formations could have a little difference.At present,the Roadian and Wordian stages of Guadalupian Series have only one conodont zone respectively.Conodont taxonomy of the Rodian and Wordian in West Texas needs to be re-examined acutely,and it is possible that more conodont zones will be discovered.

【Keywords in Chinese】 牙形刺大河深组沃德期中二叠世
【Key words】 ConodontsDaheshen FormationWordianMiddle Permian
【Fund】 国家自然科学基金重点项目(40839910)、国家自然科学基金面上项目(41072008);东北地区地质系列图件编制与综合研究(吉林省部分)项目(12120113013300)联合资助
  • 【CLC code】Q915
  • 【Downloads】94
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