一条新发现的深水相泥盆系—石炭系界线剖面：中国贵州紫云火花剖面-论文.pdf

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1、第32卷第7期地质通报Vol_32．NO．72013年7月GEoLoGICALBULLETINoFCHINAJuly．，2013r1TTl·●1●■●nlneHuonuasectiOn：aneW．JeV0nlan—arD0nlIer-l1·■n'·^●●一●OUSDoundarysectiOnOtdeep—WaterfaciesinZtyunCounty，GuizhouProvince，China一条新发现的深水相泥盆系一石炭系界线剖面中国贵州紫云火花剖面WANGXu—ri，jiQiang王旭日．季强InstituteofGeology,ChineseAc

2、ademyofGeologicalSciences，26BaiwanzhuangRoad,Beijing10003ZChina中国地质科学院地质研究所．北京100037WangXRJiQ．TheHuohuasection：anewDevonian-Carboniferousboundarysectionofdeep-waterfaciesinZiyunCounty。GnizhouProvince，China．GeologicalBulletinofChina，2013，32(7)：977-987Abstract：Thispaperintroducesane

3、wsectionoftheDevonian—CarboniferousboundaryinHuohuaarea，ZiyunCounty，GuizhouProvince，SouthChina．TheHuohuasectionofUpperDevonianandLowerCarboniferousiswell—outcroppeda1onganewcountrysideroad．Inthissection,theD—CboundarybedsCanbegroupedintothreelitho—units：theDaihuaFormation,theChang

4、shunShOeandthe’'WangyouFormation”，fromwhichmorethan30conodontsampleswerecollectedandprocessed．Accordingtoourcurrentstudy，someimportantconodontsintheDaihuaFormationandtheChangshunShOehavebeenrecognized．suchasPalmo~olepistenuipunctata,#dora,PcLmnnra,gracilis，PolygnathusvogesiandPoly

5、gnathuspuruspurus．Afewconodon~havebeenfoundfromtheWangyouFormation，suchasPolygnathuscommunisandHindeodellasubtilis．BasedonthecomparisonwiththeMuhuasectioninChangshuncountyandtheHasselbachtalsectioninGermanyinlithology，sedimentologyandconodontbiostratigraphy，theD—Cboundarycouldbete

6、mporarilyplacedbetweenBed25andBed26，namelybetweentheChangshunShOeandtheWangyouFormation．Keywords：Devonian——Carboniferousboundary；conodontbiostratigraphy；Ziyun；Guizhou摘要：在贵州省紫云县火花乡新发现一条泥盆系一石炭系界线剖面。火花剖面位于新修的乡村公路边上．出露有连续的上泥盆统代化组、长顺页岩和下石炭统王佑组。为了研究泥盆系一石炭系界线，对该剖面进行了实测。并采集、分析了30多个牙形刺样品。根

7、据分析结果，在代化组和长顺页岩中识别出一些牙形刺，如Palmatolepistenuipunctata，gldora，marginifera，gra-cilis，Polygnathusvogesi和Polygnathuspuruspurus。王佑组中的牙形刺较少，如Polygm~huscommunis和Hindeodellasubtilis等，目前尚不具有建立生物地层单位的条件。根据与长顺睦化剖面和德国Hasselbachtal剖面岩性、沉积特征和牙形刺生物地层的对比，暂将火花剖面的泥盆系一石炭系界线放置于25层与26层之间．即长顺页岩与王佑组之间关键词：

8、泥盆系一石炭系界线；牙形刺生物地层；紫云；贵州中图分类号：P534