西准噶尔俄姆哈剖面泥盆纪-石炭纪之交介形类的发现及其意义  

Ostracods from the Emuha Section of Devonian-Carboniferous Transitional in Western Junggar

作　　者：宋俊俊[1] 龚一鸣[1] 

机构地区：[1]中国地质大学生物地质与环境地质国家重点实验室,湖北武汉430074

出　　处：《地球科学（中国地质大学学报）》2015年第5期797-809,共13页Earth Science-Journal of China University of Geosciences

基　　金：新疆1:25万铁厂沟镇幅(L45C002001)与克拉玛依市幅(L45C003001)区调修测项目(No.1212011120502);国家自然科学基金项目(No.41290260;41472001);高等学校博士学科点专项科研基金项目(No.20120145110012)

摘　　要：为进一步丰富新疆西准噶尔地区泥盆纪-石炭纪(D-C)之交古生物地层资料,为研究区泥盆和石炭系划分、古环境重建提供新的证据,经野外采样、室内处理等工作,首次报道了西准噶尔俄姆哈地区D-C之交介形类9属12种(包括1新种):Cavellina sublatiovata,C.cf.obesa,C.sp.,Glyptopleura sp.,Healdianella renalata,H.sp.,Bairdiocypris vafra,Bairdia sp.,Rectobairdiasp.,Fabalicypris sp.,Youngiella calvata,Coelonella xizhunensis sp.nov..根据介形类生物地层,并参照共生的其他门类化石,认为西准噶尔俄姆哈剖面至少在第3层就进入了早石炭世,进一步证明了洪古勒楞组的时代应该是晚泥盆世-早石炭世.介形类的古生态研究表明,西准噶尔俄姆哈地区是火山岛弧区在火山间歇期的近岸浅水沉积环境.To provide new evidences for the stratigraphic division of Devonian and Carboniferous as well as paleoenvironmental reconstruction of western Junggar, Xinjiang, NW China. The biostratigraphic data of Devonian-Carboniferous boundary （D-C） has been explored in this study by field sampling and laboratory analysis in western Junggar. 12 ostracod species （including 1 new species） from the Devonian-Carboniferous in the Emuha section of western Junggar are first described and presented. It is found that they belong to 9 genera, including Cavellina sublatiovata, C. cf. obesa, C. sp., Glyptopleura sp., Healdianella renalata, H. sp., Bairdiocypris vafra, Bairdia sp., Rectobairdia sp., Fabalicypris sp., Youngiella calvata, Coelonella xizhunensis sp. nov.. The stratigraphical distribution of ostracods in the Emuha section suggests that the Hongguleleng Forma tion should be Late Devonian to the Early Carboniferous in age. In terms of paleoeeology, the retrieved ostracods indicate an off-shore environment during intermittent periods of volcanic activities in volcanic arc zone.

关 键 词：介形类 泥盆纪-石炭纪 西准噶尔 地层学 沉积学 

分 类 号：P52[天文地球—古生物学与地层学]