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1、第42卷第4期中國地質(zhì)、,01.42.No.42015年8月GE0L0GYINCHINAAug.,2015程龍,王傳尚,李志宏,等.廣西象州崖腳晚泥盆世一晚石炭世巴平組的地質(zhì)時代[J].中國地質(zhì),2015,42(4):973—989.ChengLong,WangChuanshang,LiZhihong,eta1.GeologicalageoftheLateDevonian—LateCarboniferousBapingFormationinYajiao,XiangzhouCounty,Guanxi[J].GeologyinChina
2、,2015,42(4):973—989(inChinesewithEnglishabstract).廣西象州崖腳晚泥盆世一晚石炭世巴平組的地質(zhì)時代程龍王傳尚李志宏彭中勤張保民(中國地質(zhì)調(diào)查局武漢地質(zhì)調(diào)查中心,湖北武~430205)提要:本文通過重新測制剖面和補(bǔ)充采樣,系統(tǒng)檢查和研究了崖腳剖面晚泥盆世晚期一晚石炭世早期牙形石生物地層。通過對在17個牙形石樣品中獲得的豐富的牙形石材料鑒定,厘定了一些重要牙形石分類。在此基礎(chǔ)上,根據(jù)牙形石垂向分布特征,確定了帶化石的層位。崖腳剖面五指山組上部和巴平組劃分出7個牙形石帶:五指山組上部為Pal
3、rnatolepisgracil&sigmoidalis帶;巴平組下段分別為Siphonodelladuplicate帶,crenulata帶,&osticha帶,Scaliognathuspreaanchoralis帶和anchoralis帶下部;巴平組上段為anchoral~帶上部和Declinognathodasnoduliferusnoduliferus亞帶;巴平組的牙形石帶特征顯示巴平組的地質(zhì)時代為晚泥盆世一晚石炭世早期。巴平組地質(zhì)時代的確定為不同相區(qū)層序地層劃分,特別是對早石炭世斜坡相區(qū)地層劃分與對比提供了可靠的依據(jù)。關(guān)
4、鍵詞:巴平組;牙形石;晚泥盆世;晚石炭世;廣西中圖分類號:P534.44-45文獻(xiàn)標(biāo)志碼:A文章編號:1o00—3657(2015)O4—0973—17GeologicalageoftheLateDevonian?!狶ateCarboniferousBapingFormationinYajiao,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.a(chǎn)nchoraliszonefromthelowerpartofBapingFormation;Declinogaptusnoduliferusnoduliferuszonefro
8、mtheupperpartofBapingFormation.TheconodontszonesindicatethattheageofBapingFormationisLateDevonian—earlyLateCarbonifer