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Cyclostratigraphic Calibration of the Upper ordovician(Sandbian-Katian) Pagoda and Linhsiang Formations in the Yichang Area,South China

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Acta Geologica Sinica(English Edition) 2019年第S1期93卷 177-180页

作者： ZHONG Yangyang CHEN Dongyang FAN Junxuan WU Huaichun FANG Qiang SHI Meinan State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China School of Ocean Sciences China University of GeosciencesBeijing 100083China Jiangsu Huohe Information Technology Co. LtdNanjing 210000JiangsuChina School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China

1 Introduction The Sandbian-Katian is a critical period for the transition from"hot-house"in the Lower ordovician to"ice-house"in the end-ordovician(Trotter et al.,2008).During this interval,the South China Block was located in the equatorial region(Torsvik and Cocks,2016),with the widespread accumulation of Pagoda and Linhsiang formations(Zhan and Jin,2007).

关键词： cyclostratigraphy time-series analysis astronomical time scale duration

Paleogeographic evolution of the Lower Yangtze region and the break of the “platform-slope-basin” pattern during the Late ordovician

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Science China Earth Sciences 2018年第5期61卷 625-636页

作者： Qing CHEN Junxuan FAN Linna ZHANG Xu CHEN CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology

Wide distribution of the black shales and diversification of the graptolite fauna in South China during the Late ordovician resulted from its unique paleogeographic pattern, which was significantly affected by the paleogeographic evolution of the Lower Yangtze region. In the study, 120 Upper ordovician sections from the Lower Yangtze region were collected, and a unified biostratigraphic framework has been applied to these sections to establish a reliable stratigraphic subdivision and correlation. Under the unified time framework, we delineate the distribution area of each lithostratigraphic unit, outline the boundary between the sea and land, and reconstruct the paleogeographic pattern for each graptolite zone. The result indicates that, with the uplift and expansion of the ‘Jiangnan Oldland' in the beginning of the late Katian, the oldland extended into the Yangtze Sea gradually from south to north, which finally separate the Jiangnan Slope and the Yangtze Platform. Consequently,the longstanding paleogeographic pattern of "platform-slope-basin" in South China was broken. The paleogeographic change led to sedimentary differentiation among the two sides of the ‘Jiangnan Oldland' during the Late ordovician. This event also led to the closure of the eastern exit of the Upper Yangtze Sea, and formed a semi-closed, limited and stagnant environment for the development of the organic-rich black shales during the Late ordovician. The major controlling factors of these paleogeographic changes in the Lower Yangtze region were not consistent from the Katian to the Hirnantian. In the late Katian, the sedimentary differentiation between the east and west sides mostly resulted from regional tectonic movement-the Kwangsian ***, during the Hirnantian, the whole Yangtze region became shallower, which was mostly influenced by the concentration of the Gondwana ice sheet and the consequent global sea level drop.

关键词：奥陶纪进化裂缝岩石层位学控制因素构造运动黑页岩沉积区

Geographical Distribution and Diversity History of Late Cambrian and ordovician Gastropods in China

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Acta Geologica Sinica(English Edition) 2019年第S1期93卷 119-122页

作者： LI Wenjie FANG Xiang ZHANG Yuandong CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology Chinese Academy of SciencesNanjingJiangsu 210008 University of Chinese Academy of Sciences Beijing 100049 Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of SciencesNanjingJiangsu 210008

1 Introduction Gastropods are one of the most diverse groups in the living *** rich,long-ranging and extensive occurrences of gastropod fossils make them a unique animal group for evolutionary,ecologic,and biogeograph... 详细信息

关键词： gastropods ordovician distribution diversity China

Early Evolution of Marine Planktonic and Nektonic Ecosystems:Questions and Chinese Approaches

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Acta Geologica Sinica(English Edition) 2019年第S1期93卷 169-172页

作者： ZHANG Yuandong ZHANG Junpeng YAN Kui FANG Xiang LI Wenjie MA Xuan WU Xuejin CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology Chinese Academy of SciencesNanjingJiangsu 210008China University of Chinese Academy of Sciences Bejing 100049China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjingJiangsu 210008China University of Science and Technology of China Hefei 230026China

The originations of marine planktons and nektons are significantly delayed than that of benthos,as evidenced by the fossil *** Cambrian Explosion produced a variety of high-level marine organisms,and many ***,a majori... 详细信息

关键词： plankton nekton ecosystem origination ordovician Furongian

Replacements of Major Cephalopod Faunas in Late Cambrian and ordovician in South China

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Acta Geologica Sinica(English Edition) 2019年第S1期93卷 102-105页

作者： FANG Xiang LI Wenjie ZHANG Yuandong ZHANG Yunbai CHEN Tingen Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of SciencesNanjingJiangsu 210008China CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjingJiangsu 210008China University of Chinese Academy of Sciences Beijing 100049China

1 Introduction As one of the major groups in the great ordovician biodiversification event(GOBE),cephalopods may have played a critical role in the marine ecosystem in late Cambrian and *** the few predators in the Or... 详细信息

关键词： faunal replacement cephalopods diversity South China great ordovician biodiversification event(GOBE)

On the Morphological Complexity of the Graptolite Tubaria in the Darriwilian(Middle ordovician)

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Acta Geologica Sinica(English Edition) 2019年第S1期93卷 135-137页

作者： MA Xuan ZHANG Yuandong University of Chinese Academy of Sciences19 Yuquan RoadBejingChina CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology39 East Bejing RoadNanjingChina

1 Introduction As one of the major zooplanktonic organisms in the ordovician and Silurian marine ecosystems,graptolites played a unique role in the GOBE(great ordovician biodiversification event)and underwent a considerable variation of diversities both in lifestyle and in speciation through the ordovician(Sadler et al.,2011;Cooper et al.,2014).

关键词： Complexity graptolite tubaria ordovician Darriwilian

华南志留纪兰多维列世鲁丹晚期一个三叶虫新种Anacaenaspis yanpingensis及其生物古地理意义（英文）

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华南志留纪兰多维列世鲁丹晚期一个三叶虫新种Anacaenaspis yanpi...

中国古生物学会第十二次全国会员代表大会暨第29届学术年...

作者：魏鑫詹仁斌 State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences University of Science and Technology of China University of Chinese Academy of Science

Anacaenaspis yanpingensis ***.,from the lower Niuchang Formation(upper Rhuddanian,lower Llandovery,lower Silurian),is the first record of this genus from South *** biogeographical distribution of Anacaenaspis and some other trilobite genera from South China(e.g.,Gaotania,Hyrokybe,Aulacopleura and Raphiophorus) in the Llandovery evidences faunal exchanges between Avalonia–Baltica,Laurentia,Australia,and South *** attribute these dispersals to prevailing ocean currents,and especially equatorial countercurrents,which would have propagated dispersals during the Rhuddanian,shortly after the endordovician mass *** wrighti and Anacaenaspis mackenziensis from Laurentia are the stratigraphically oldest established species of the genus,and both have been reported from the lower *** has also been described from the upper Rhuddanian in *** genus might,therefore,have dispersed to South China via the equatorial countercurrent soon after the end-ordovician mass *** migrations could have subsequently taken place via the southern equatorial currents during the Telychian(late Llandovery),when Anacaenaspis appeared throughout ABL(Avalonia–Baltica and Laurentia) and ***,by the Wenlock this range had contracted,with Anacaenaspis known only from Avalonia–*** proposed palaeobiogeographical hypothesis is supported by the distribution of some other trilobite genera found in South China during the *** example,Gaotania is recognized as occurring first in South China in the late Rhuddanian–Aeronian,with later appearances in Australia during the *** genus was assigned to a monophyletic group,which also included Stelckaspis from the Llandovery of Canada,Globulaspis from the Llandovery of Scotland,and Uriarra from Australia(the latter identified only on the basis of the type species).The distribution of this ‘Stelckaspis group’ thus suggests palaeobiogeographical links between

关键词： Anacaenaspis Niuchang Formation upper Rhuddanian South China

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湖北兴山古洞口下奥陶统几丁虫

微体古生物学报 2019年第4期36卷 328-336页

作者：梁艳栾晓聪现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所南京210008 中国科学院生物演化与环境卓越创新中心南京210008

系统分析兴山古洞口下奥陶统,包括南津关组、分乡组、红花园组及大湾组底部的几丁虫微体生物化石。鉴定几丁虫5属14种,含早奥陶世特征种Eremochitina baculata,早中奥陶世常见种Conochitina decipiens,以及华南上扬子区早奥陶世常见属种... 详细信息

系统分析兴山古洞口下奥陶统,包括南津关组、分乡组、红花园组及大湾组底部的几丁虫微体生物化石。鉴定几丁虫5属14种,含早奥陶世特征种Eremochitina baculata,早中奥陶世常见种Conochitina decipiens,以及华南上扬子区早奥陶世常见属种Euconochitina fenxiangensis和Lagenochitina chongqingensis。***是北冈瓦纳地区弗洛早中期的特征带化石,本文的材料为该种在华南的首次确切报道,且产出层位略低,为特马豆克期。在华南,常见于特马豆克晚期的带化石Euconochitina symmetrica在该剖面的同时段地层中暂未被发现,但形态上与之高度相似的Euconochitina fenxiangensis在该时段大量出现。比较以往发表的数据后发现,***在华南的分布广泛且产出层位较为稳定,较之***更易获得,或可将其作为特马豆克晚期至弗洛初期区域内地层对比的一个有效卡尺。

关键词：分乡组红花园组特马豆克期弗洛期生物地层扬子区

新疆库鲁克塔格上奥陶统杂土坡组叶月贝动物群的发现

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古生物学报 2017年第3期36卷 322-330页

作者：张雨晨詹仁斌王怿唐鹏现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所南京210008 中国科学院大学北京100049

叶月贝腕足动物群是晚奥陶世海洋较深水底域中一个重要的底栖壳相动物群。文中首次报道了在新疆东南部库鲁克塔格地区却尔却克山上奥陶统杂土坡组发现的叶月贝动物群,包括腕足动物5属5种(含两个未定种),分别为:Apatobolus ***,Lingulell... 详细信息

叶月贝腕足动物群是晚奥陶世海洋较深水底域中一个重要的底栖壳相动物群。文中首次报道了在新疆东南部库鲁克塔格地区却尔却克山上奥陶统杂土坡组发现的叶月贝动物群,包括腕足动物5属5种(含两个未定种),分别为:Apatobolus ***,Lingulellasp.,Foliomena xinjiangensis,Kassinella(Kassinella)***和Eoplectodonta sp.。壳相化石与笔石共同产出,保存在深灰色泥岩中,推测大致相当于BA5甚至稍深的底域环境。在同一条剖面上,叶月贝动物群曾报道于层位稍高的银屏山组[上奥陶统凯迪阶(Katian)上部],二者之间可能存在分类学和古生态学的联系。叶月贝腕足动物群在塔里木板块的持续发育为深入开展这一古板块的古地理重建提供了依据。

关键词：叶月贝动物群杂土坡组奥陶纪新疆库鲁克塔格