PROGRESSES ON STUDY OF CONODONT SEQUENCE FOR THE GSSP SECTION AT MEISHAN,CHANGXING,ZHEJIANG PROVINCE,SOUTH CHINA
PROGRESSES ON STUDY OF CONODONT SEQUENCE FOR THE GSSP SECTION AT MEISHAN,CHANGXING,ZHEJIANG PROVINCE,SOUTH CHINA
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发表时间：
2009
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通讯作者：
Tong Jin-nan
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作者：
Tong Jin-nan
浙江长兴梅山剖面有二叠-三叠系界线的全球层型剖面和点（GSSP）和吴家坪-长兴系界线的全球层型剖面和点（GSSP）。本文根据近30年来梅山剖面牙形石的研究，总结出上二叠统-下三叠统13个牙形石带，自下而上依次为：Neogondolella orientalis-Neogondolella longicuspidata带Neogondolella wangi带（龙潭组最上部至长兴组最下部，1-4a-1层）（长兴组下部4a-2- 10层，该带的首次出现是长兴期开始的标志），长兴新筒菌-偏折新筒菌带Neogondolella yini-N.zhangi带长兴组上部11-23层Neogondolella meishanensis带（长兴组顶部，24层）Hindeodus changxingensis带（银坑组底部，第25层）Neogondolella taylorae带（银坑组底部，26层）（银坑底部，27 a-27 b层），Hindeodus parvus带（银坑组底部，27 c层，Hindeodus parvus带的首次出现是三叠系底部的标志），Isarcicella staeschei带Isarcicella isarcica带（银坑组底部，27 d-29 a层）Neogondolella tulongensis-Neogondolella planata带（银坑组中下部，29 b-51层）（银坑组上部和合龙山组下部，第52-72层），Neospathodus Musmeli带Neospathodu cristagalli-Neospathodu dieneri带（和龙山组中段，第73-92层）（上合龙山组和下南岭湖组，第93-111层）。为了改善世界各地不同地区之间的互相关，并对二叠纪-三叠纪过渡期的平行hindeodid和gondolellid分带进行了讨论和修正。
Meishan section at Changxing,Zhejiang Province,South China contains two golden spikes——the Global Stratotype Section and Point(GSSP) for the Permian-Triassic Boundary and Wuchiapingian-Changhsingian Boundary.In ascending order,the Upper Permian and Lower Triassic at Meishan section consist of upper Longtan Formation,Changxing Formation,Yinkeng Formation,Helongshan Formation,and lower Nanlinghu Formation.Based on the research of conodonts at Meishan section during past 30 years,this paper summarizes 13 conodont zones for the Upper Permian-Lower Triassic.In ascending order they are as follows:Neogondolella orientalis-Neogondolella longicuspidata Zone(uppermost Longtan Formation to lowermost Changxing Formation,beds 1—4a-1),Neogondolella wangi Zone(lower part of Changxing Formation,beds 4a-2—10.The first appearance of this Zone is the marker of the beginning of Changshingian),Neogondolella changxingensis-Neogondolella deflecta Zone(upper part of Changxing Formation,beds 11—23),Neogondolella yini-N.zhangi Zone(top of Changxing Formation,bed 24),Neogondolella meishanensis Zone(basal part of Yinkeng Formation,bed 25),Hindeodus changxingensis Zone(basal part of Yinkeng Formation,bed 26),Neogondolella taylorae Zone(basal part of Yinkeng,beds 27a—27b),Hindeodus parvus Zone(basal part of Yinkeng Formation,bed 27c.The first appearance of Hindeodus parvus Zone is the marker for the base of the Triassic System),Isarcicella staeschei Zone(basal part of Yinkeng Formation,beds 27d—29a),Isarcicella isarcica Zone(lower and middle part of Yinkeng Formation,beds 29b—51),Neogondolella tulongensis-Neogondolella planata Zone(upper Yinkeng Formation and lower part of helongshan Formation,beds 52—72),Neospathodus kummeli Zone(middle part of Helongshan Formation,beds 73—92),Neospathodu cristagalli-Neospathodu dieneri Zone(upper Helongshan Formation and lower Nanlinghu Formation,beds 93—111).For ameliorating cross-correlations between different regions around the world,parallel hindeodid and gondolellid zonations during the Permian-Triassic transitional period have also been discussed and revised.