新疆巴楚中-晚奥陶世牙形刺研究的新进展
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摘要
新疆巴楚新测一间房剖面分析出牙形刺24属47种。以带分子首现为标志,该剖面中上奥陶统自上而下可划分出8个牙形刺带。其中,恰尔巴克组3个带:Baltoniodusalobatus,Prioniodusvariabilis,Pygodusanserinus;一间房组3个带:Eoplacognathuscrassus,Lenodus(Amorphognathus)variabilis,Microzarkodinaparva;鹰山组2个带:Paroistoduscf.originalis;PteracontiodusexilisScolopodusbicostatus组合带。这些牙形刺带完全可与我国浙江常山黄泥塘金钉子剖面以及华南达瑞威尔阶及其上下的牙形刺带进行对比,证实一间房组几乎与达瑞威尔阶完全相当;恰尔巴克组可与华南庙坡阶对比。据牙形刺带有缺失的认识,结合地震、物探资料认为巴楚塔河阿克库勒等凸起地区,奥陶系中、上统之间有间断存在。
Diverse conodonts including 47 species of 24 genera are discovered from the Middle and Upper Ordovician in the Yijianfang section of Bachu, Southern Xinjiang, and 8 conodont zones or assemblage zones have been recognized based on the first occurrence of zonal species, in descending order they are as follows: The Qiaerbake Formation (O 3q) 8) Baltoniodus alobatus zone; 7) Prioniodus variabilis zone; 6) Pygodus anserinus zone The Yijianfang Formation(O 2yj) 5) Eoplacognathus crassus zone; 4) Lenodus(Amorphognathus) variabilis zone; 3) Microzarkodina parva zone The Yingshan Formation(O 1-2y) 2) Paroistodus cf.originalis zone; 1) Pteracontiodus exilis-Scolopodus bicostatus assemblage zone On the basis of a detailed comparison and discussion, we concluded that this zone sequence could be well correlated with those zones established in the golden spike section at Huangnitang, Changshan of Zhejiang and around the Darriwillian in other areas of China (Chen et al., 1998; Wang and Bergstrm, 1999; Wang et al., 1993; Zhao et al., 2000) (Table Ⅱ), and confirmed the Yijianfang Formation to be essentially equivalent to the Darriwilian Stage, while the Qiaerbake Formation in Xinjiang is a correlative of the Miaopo Formation of the Yangtze Region.
Diverse conodonts including 47 species of 24 genera are discovered from the Middle and Upper Ordovician in the Yijianfang section of Bachu, Southern Xinjiang, and 8 conodont zones or assemblage zones have been recognized based on the first occurrence of zonal species, in descending order they are as follows: The Qiaerbake Formation (O 3q) 8) Baltoniodus alobatus zone; 7) Prioniodus variabilis zone; 6) Pygodus anserinus zone The Yijianfang Formation(O 2yj) 5) Eoplacognathus crassus zone; 4) Lenodus(Amorphognathus) variabilis zone; 3) Microzarkodina parva zone The Yingshan Formation(O 1-2y) 2) Paroistodus cf.originalis zone; 1) Pteracontiodus exilis-Scolopodus bicostatus assemblage zone On the basis of a detailed comparison and discussion, we concluded that this zone sequence could be well correlated with those zones established in the golden spike section at Huangnitang, Changshan of Zhejiang and around the Darriwillian in other areas of China (Chen et al., 1998; Wang and Bergstrm, 1999; Wang et al., 1993; Zhao et al., 2000) (Table Ⅱ), and confirmed the Yijianfang Formation to be essentially equivalent to the Darriwilian Stage, while the Qiaerbake Formation in Xinjiang is a correlative of the Miaopo Formation of the Yangtze Region.
引文
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SouthernXinjiangPetroleumProspectingCorporation,XinjiangPetroleumAdministrationBureau,ExplorationandDevelopmentResearchInstitute(新疆石油管理局南疆石油勘探公司),ExplorationandDevelopmentResearchInstitute,JianghanPetroleumAdministrationBureau(江汉石油管理局勘探开发研究院),1992.SiniantoPermianStratigraphyandPalaeontologyoftheTarimBasin.Xinjiang(Ⅱ):KalpinBachuRegion.Beijing:PetroleumIndustryPress.31157(inChinese).
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WangZhihao(王志浩),BergstrmSM,1999.ConodontsacrossthebaseoftheDarriwilianStageinSouthChina.ActaMicropalaeontologicaSinica,16(4):325350(inChinesewithEnglishabstract).
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ZhaoZhixin(赵治信),ZhangGuizhi(张桂芝),XiaoJinan(肖继南),2000.PaleozoicstratigraphyandconodontsinXinjiang.Beijing:PetroleumIndustryPress.340pp.81pls(inChinese).
ZhouDikang(周棣康),ZhouTianrong(周天荣),WangPu(王朴),1991.DivisionofgeologicalagesofQiuritagGroupinNortheasternTarim.ResearchofPetroleumGeologyofNorthernTarimBasininChina(1).Wuhan:ChinaUniversityofGeosciencePress.3643(inChinese).
ZhouZhiyi(周志毅),ChenPiji(陈丕基)(eds.),1990.BiostratigraphyandgeologyevolutionofTarim(4).Beijing:SciencePress.56130(inChinese).
ZhouZhiyi(周志毅),ZhaoZhixin(赵治信),HuZhaoxun(胡兆王旬)et.al.,2001.StratigraphyoftheTarimBasin.Beijing:SciencePress.3980(inChinese).
AnTaixiang(安泰庠),DuGuoqing(杜国清),GaoQinqin(高琴琴),1985.OrdovicianconodontsfromHubei,China.Beijing:GeologicalPublishingHouse.55pp,18pls(inChinese).
AnTaixiang(安泰庠),1987.TheLowerPaleozoicconodontsofSouthChina.Beijing:PekingUniversityPress.238pp,35pls(inChinese).
AnTaixiang(安泰庠),ZhengZhaochang(郑昭昌),1990.TheconodontsofthemarginalareasaroundtheOrdosBasin,NorthChina.Beijing:SciencePress.202pp,17pls(inChinese).
BergstrmSM,1971.ConodontbiostratigraphyoftheMiddleandUpperOrdovicianofEuropeandeasternNorthAmerica.MemoiroftheGeologicalSocietyofAmerica,127:83157.
ChenXu(陈旭),WangZhihao(王志浩),ZhangYuandong(张元动),1998.TheFirstGSSP(GoldenSpike)inChina.JournalofStratigraphy,22(1):19(inChinesewithEnglishabstract).
CompilingGroupoftheRegionalStratigraphicChartofXinjiangUygarAutonomousRegion(新疆区域地层表编写组),1981.RegionalStratigraphicChartofNorthwestChina,XinjiangFascicule.Beijing:GeologicalPublishingHouse.314414(inChinese).
LaiCaigen(赖才根),WangXiaofeng(汪啸风),AnTaixiang(安泰庠)etal.,1982.StratigraphyofChina(No.5)—TheOrdovicianSystemofChina.Beijing:GeologicalPublishingHouse.274pp.11pls(inChinese).
LiuWanxiang(刘万祥),HuangZhibin(黄智斌),1999.TheRelationBetweenMiddleandLowerOrdovicianinKuluktagArea,TarimBasin.XinjiangPetroleumGeology,20(3):225229(inChinese).
NanjingInstituteofGeologyandPalaeontology,ChineseAcademyofSciences,2000.StratigraphicalStudiesinChina(19791999).Hefei:PressofUniversityofScienceandTechnologyofChina.3958(inChinese).
ShengXinfu(盛莘夫),1974.TheOrdovicianSystemindivisionandcontrastofChina.Beijing:GeologicalPublishingHouse.152(inChinese).
SouthernXinjiangPetroleumProspectingCorporation,XinjiangPetroleumAdministrationBureau,ExplorationandDevelopmentResearchInstitute(新疆石油管理局南疆石油勘探公司),ExplorationandDevelopmentResearchInstitute,JianghanPetroleumAdministrationBureau(江汉石油管理局勘探开发研究院),1992.SiniantoPermianStratigraphyandPalaeontologyoftheTarimBasin.Xinjiang(Ⅱ):KalpinBachuRegion.Beijing:PetroleumIndustryPress.31157(inChinese).
TheNationalCommissiononStratigraphy,2001.TheStratigraphyinGuideandExplanatoryofChina.Beijing:GeologicalPublishingHouse.159(inChinese).
WangChengyuan(王成源),DingLiansheng(丁连生),DuanJinying(段金英)etal.,1993.ConodontsofLowerYangtzeValley—anindexestobiostratigraphyandorganicmetamorphicmaturity.Beijing:SciencePress.290pp.59pls(inChinese).
WangZhihao(王志浩),ZhouTianrong(周天荣),1998.OrdovicianconodontsfromwesternandnortheasternTarimandtheirsignificance.ActaPalaeontologicaSinica,37(2):173193(inChinesewithEnglishabstract).
WangZhihao(王志浩),BergstrmSM,1999.ConodontsacrossthebaseoftheDarriwilianStageinSouthChina.ActaMicropalaeontologicaSinica,16(4):325350(inChinesewithEnglishabstract).
WangZhihao(王志浩),QiYuping(祁玉平),2001.OrdovicianConodontsfromdrillingsintheTaklimakanDesert,Xinjiang,NWChina.ActaMicropalaeontologicaSinica,18(2):133148.
ZengXuelu(曾学鲁),XuYulin(徐钰麟),WuTao(武涛)etal.1996.SequencestratigraphyandpalaeobiologyinNorthernTarimBasin,Xinjiang.Beijing:GeologicalPublishingHouse81pp(inChinese).
ZhaoZhixin(赵治信),TanZeyin(谭泽金),TangPeng(唐鹏)etal.,1999.TheOrdovicianbiostratigraphyinthehinterlandoftheTarimBasin.XinjiangPetroleumGeology,20(6):494500(inChinese).
ZhaoZhixin(赵治信),ZhangGuizhi(张桂芝),XiaoJinan(肖继南),2000.PaleozoicstratigraphyandconodontsinXinjiang.Beijing:PetroleumIndustryPress.340pp.81pls(inChinese).
ZhouDikang(周棣康),ZhouTianrong(周天荣),WangPu(王朴),1991.DivisionofgeologicalagesofQiuritagGroupinNortheasternTarim.ResearchofPetroleumGeologyofNorthernTarimBasininChina(1).Wuhan:ChinaUniversityofGeosciencePress.3643(inChinese).
ZhouZhiyi(周志毅),ChenPiji(陈丕基)(eds.),1990.BiostratigraphyandgeologyevolutionofTarim(4).Beijing:SciencePress.56130(inChinese).
ZhouZhiyi(周志毅),ZhaoZhixin(赵治信),HuZhaoxun(胡兆王旬)et.al.,2001.StratigraphyoftheTarimBasin.Beijing:SciencePress.3980(inChinese).
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