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ID:46303480
大小:2.56 MB
页数:17页
时间:2019-11-22
《广西象州崖脚晚泥盆世--晚石炭世巴平组的地质时代》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第42卷第4期中国地质、,01.42.No.42015年8月GE0L0GYINCHINAAug.,2015程龙,王传尚,李志宏,等.广西象州崖脚晚泥盆世一晚石炭世巴平组的地质时代[J].中国地质,2015,42(4):973—989.ChengLong,WangChuanshang,LiZhihong,eta1.GeologicalageoftheLateDevonian—LateCarboniferousBapingFormationinYajiao,XiangzhouCounty,Guanxi[J].GeologyinChina
2、,2015,42(4):973—989(inChinesewithEnglishabstract).广西象州崖脚晚泥盆世一晚石炭世巴平组的地质时代程龙王传尚李志宏彭中勤张保民(中国地质调查局武汉地质调查中心,湖北武~430205)提要:本文通过重新测制剖面和补充采样,系统检查和研究了崖脚剖面晚泥盆世晚期一晚石炭世早期牙形石生物地层。通过对在17个牙形石样品中获得的丰富的牙形石材料鉴定,厘定了一些重要牙形石分类。在此基础上,根据牙形石垂向分布特征,确定了带化石的层位。崖脚剖面五指山组上部和巴平组划分出7个牙形石带:五指山组上部为Pal
3、rnatolepisgracil&sigmoidalis带;巴平组下段分别为Siphonodelladuplicate带,crenulata带,&osticha带,Scaliognathuspreaanchoralis带和anchoralis带下部;巴平组上段为anchoral~带上部和Declinognathodasnoduliferusnoduliferus亚带;巴平组的牙形石带特征显示巴平组的地质时代为晚泥盆世一晚石炭世早期。巴平组地质时代的确定为不同相区层序地层划分,特别是对早石炭世斜坡相区地层划分与对比提供了可靠的依据。关
4、键词:巴平组;牙形石;晚泥盆世;晚石炭世;广西中图分类号:P534.44-45文献标志码:A文章编号:1o00—3657(2015)O4—0973—17GeologicalageoftheLateDevonian。——LateCarboniferousBapingFormationinYajiao,XiangzhouCounty,GuanxiCHENGLong,WANGChuan—shang,LIZhi—hong,PENGZhong—qin,ZHANGBao—min(WuhanInstituteofGeologyandMineral
5、Resources,Wuhan,430205,HubeLChina)Abstract:ThelateLateDevonian---earlyLateCarboniferousconodontbiostrataofYajiaosectionwassystematicallyexaminedandstudiedinthispaper,basedonmeasurementandcollectingsamplesinthissection.Thesystematicpaleontologyofsomeimportantconodontswa
6、srevised,throughidentifyingtheabundantconodontsmaterialsfrom17conotontsamples.Duetotheverticaldistributionoftheconotonts,thestrataofthezoningfossilswereconfirmed.Totally7conodontszoneswereclarifiedfromtheupperpartofWuzhishanFormationtoBapingFormationintheYajiasection,r
7、espectively:PalmatolepisgracilissigmoidaliszonefromtheupperpartofWuzhishanFormation;Siphonodelladuplicatezone,S.crenulatazone,S.isostichazone,Scaliognathuspreaanchoraliszone,andS.anchoraliszonefromthelowerpartofBapingFormation;Declinogaptusnoduliferusnoduliferuszonefro
8、mtheupperpartofBapingFormation.TheconodontszonesindicatethattheageofBapingFormationisLateDevonian—earlyLateCarbonifer
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