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1、第40卷第5期地球科学———中国地质大学学报Vol.40No.52015年5月EarthScience—JournalofChinaUniversityofGeosciencesMay2015doi:10.3799/dqkx.2015.065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宋俊俊,龚一鸣*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
2、,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):Cavellinasublatiovata,C.cfo.besa,C.sp.,Glyptopleurasp.,Healdianellarenalata,H.sp.,Bairdiocyprisvafra,Bairdiasp.,Rectobairdiasp.,Fabalicyprissp.,Youngiellacalvata,Coelonellaxizhunensissp.nov..根据介形类生物地层,并参
3、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.关键词:介形类;泥盆纪-石炭纪;西准噶尔;地层学;沉积学.中图分类号:P52文章编号:1000-2383(2015)05-0797-13收稿日期:2014-09-21OstracodsfromtheEmuhaSectionofDevonian-CarboniferousTransitiona
4、linWesternJunggar*SongJunjun,GongYimingStateKeyLaboratoryofBiogeologyandEnvironmentalGeology,ChinaUniversityofGeosciences,Wuhan430074,ChinaAbstract:ToprovidenewevidencesforthestratigraphicdivisionofDevonianandCarboniferousaswellaspaleoenvironmentalrecon
5、structionofwesternJunggar,Xinjiang,NWChina.ThebiostratigraphicdataofDevonian-Carboniferousboundary(D-C)hasbeenexploredinthisstudybyfieldsamplingandlaboratoryanalysisinwesternJunggar.12ostracodspecies(including1newspecies)fromtheDevonian-Carboniferousint
6、heEmuhasectionofwesternJunggararefirstdescribedandpresented.Itisfoundthattheybelongto9genera,includingCavellinasublatiovata,C.cf.obesa,C.sp.,Glyptopleurasp.,Healdianellarenalata,H.sp.,Bairdiocyprisvafra,Bairdiasp.,Rectobairdiasp.,Fabalicyprissp.,Youngie
7、llacalvata,Coelonellaxizhunensissp.nov..ThestratigraphicaldistributionofostracodsintheEmuhasectionsuggeststhattheHonggulelengForma-tionshouldbeLateDevoniantotheEarlyCarboniferousinage.Intermsofpaleoecology,theretrievedostracodsindicateanoff-shoreenviron
8、mentduringintermittentperiodsofvolcanicactivitiesinvolcanicarczone.Keywords:ostracod;Devonian-Carboniferous;westernJunggar;stratigraphy;sedimentology.西准噶尔位于新疆西北部,是北疆-兴安地层泥盆统及下石炭统发育良好,是研究泥盆系-石炭大区北疆地层区的重要组成部分(蔡土赐,1999;纵系界线地层划分对比的重要
