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Speciation of the genus Arthricocephalus Bergeron, 1899 (Trilobita) from the late Early Cambrian and its stratigraphic significance

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Progress in Natural Science:Materials International 2006年第6期16卷 614-623页

作者： YUAN Jinliang, ZHAO Yuanlong and YANG Xinglian (nanjing institute of {4. and palaeontology,{4., nanjing 210008, China College of Resource and Environment of Guizhou University, Guiyang 550003, China) [a] nanjing institute of geology and palaeontology Chinese Academy of Sciences Nanjing China [b] College of Resource and Environment of Guizhou University Guiyang China

The genus Arthricocephalus Bergeron, 1899 is revised, and Halipanktos Balker & Peel, 1997 is suggested here as a senior synonym. The subgenus Arthricocephalus (Arthricocephalites) Chien & lin in Lu et al. , 1974.is considered as a separate genus. Of the 20 previously assigned species of Arthricocephaius (Arthricocephalus) Bergeron, 1899, Arthricocephalus (Arthricocephalites) Chien & lin in Lu et al. , 1974. Arthricocephalus (Euarthricocephalus) Ju, 1983 are lumped into eight species. The speciation trend of Arthricocephalus and Arthricocephalites is demonstrated based on their stratigraphic occurrences. It not only enhances the resolution of the biostatigraphic zonation in the uppermost Lower Cambrian, but also represents a potential candidate to define the Duyunian stage. The base of the stage is suggested at the first appearance datum (FAD) of Arthricocephalus chauveaui Bergeron, 1899 within the evolutionary lineage from Ar. jiangkouensis Yin in Yin & li, 1978 to Ar. chauveaui in a global scale.

关键词： late Early Cambrian Duyunian stage speciation of Arthricocephalus and Arthricocephalites biostratigraphy.

Sedimentary environment of the Dajin conglomerate in Tibet, age of foraminiferan assemblages and their tectonic significance

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Progress in Natural Science:Materials International 2005年第11期15卷 1014-1020页

作者： YAN Zhen, FANG Aimin, PAN Yusheng, li Jiliang, liU Xiaohan, YU liangjun and ZHANG Binggao (Laboratory of lithosphere Tectonic Evolution, institute of geology and Geophysics, chinese academy of sciences, Beijing 100029, China institute of Tibet Plateau Research, chinese academy of sciences, Beijing 100029, China nanjing institute of Paleontology, chinese academy of sciences, nanjing 210008, China) Laboratory of lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China. institute of Tibet Plateau Research Chinese Academy of Sciences Beijing 100029 China. nanjing institute of Paleontology Chinese Academy of Sciences Nanjing 210008 China

The Dajin conglomerate, which is one of the most important sedimentary successions of the Xigaze forearc basin in Tibet, China, consists of deep-shallow marine tuffaceous turbidites and clastic rocks bearing Nummulites, Assilina, Alveolina and Lock-hartia . These fossils are very similar to the foraminiferan in the Jialazi and Maila conglomerates, and those in Gangba and Dingri areas. They developed in the Eocene. By analyzing the spatial variation of Eocene sedimentary environments of Tibet Plateau and the foraminiferan in the Dajin conglomerate, we found that Eocene sedimentation should take place on both sides of the Yarlung Tsangpo suture, and the late Eocene tectonic uplifting should make the forearc basin expose out of the sea level and begin to receive nonmarine deposits.

关键词： Dajin conglomerate marine deposits Eocene foraminiferan Yarlang Tsangpo sutnre.

A high-resolution late Pleistocene record of pollen vegetation and climate change from Jingning, NW China

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Science China Earth sciences 2006年第2期49卷 154-162页

作者： li Chunhai12, TANG lingyu1, FENG Zhaodong3,4. ZHANG Hucai2, WANG Weiguo3 & AN Chenbang3 1. nanjing institute of {4. and palaeontology,{4., nanjing 210008, China 2. Nanjng institute of Geography and limnology,{4., nanjing 210008, China 3. Environment and Resources College, Lanzhou University, Lanzhou 730000, China 4. Beijing Normal University, Beijing 100875, China 1. nanjing institute of geology and palaeontology Chinese Academy of Sciences Nanjing 210008 China 2. Nanjng institute of Geography and limnology Chinese Academy of Sciences Nanjing 210008 China 3. Environment and Resources College Lanzhou University Lanzhou 730000 China 4. Beijing Normal University Beijing 100875 China

With the support of 18 AMS-14. data, a high-resolution pollen record from the Suancigou section at Jingning, Gansu Province was established. Our results showed that the vegetation ex-perienced a series of changes characterized by the alternative growth and decline of forest and steppe components during the period from 4..2 to 11 ka B.P. in the Jingning area. Over the period of 4.―29 ka B.P. (MIS3), coniferous forests were flourishing, indicating a humid climate with the tem-perature being lower than that of the present. Since 23 ka B.P., the vegetation was dominated by steppe-desert steppe under a cold and dry condition, and entered the Last Glacial Maximum domi-nated by desert steppe. Several periods of the marked decrease in the arborous pollen content in Suancigou well corresponded to the North Atlantic Heinrich events, especially to Heinrich event 3, further supporting that the Heinrich events were well reflected by the pollen record in the Loess Pla-teau as well.

关键词： Western Loess Plateau, pollen record, climatic change, late Pleistocene.

RECONSIDERATION OF THE PHYLOGENETIC AFFINITIES OF ZHIJINITIDS

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微体古生物学报 2000年第3期 313-316页

作者： Qian Yi Zhu Mao yan li Guo xiang (nanjing institute of geology and {4.,{4., nanjing 210008) Chen Meng’e (institute of geology,{4., Beijing 100029)

This discovery of complete body fossils of Halkieria and Microdictyon, two problematical taxa originally erected on the basis of isolated sclerites from Cambrian konservt lagersttte, sheds new light on our understanding of the Early Cambrian small shelly fauna. Based on comparisions of the morphology and preservation of nail shaped sclerites of zhijinitids, Hallucigenia and Onychodictyon, we propose that Zhijinites and Parazhijinites may have been closely related to tardipolypods, a diverse group of Early Cambrian metazoans.

关键词： small shelly fossils scleritome zhijinitids tardipolypods Early Cambrian

A Comprehensive Evaluation on the Devonian-Carboniferous Boundary Stratotype Candidate Section in Nanbiancun, Guilin, Guangxi

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Acta Geologica Sinica(English Edition) 1990年第1期64卷 69-79页

作者： Yu Changmin nanjing institute of geology and palaeontology, Academia Sinica 2This paper is extracted from some relevant chapters of a monograph. The authors who wrote the monograph are: Yu Changmin Ruan Yiping Xu Hankui Wang Shangqi Zhu Zhaoling Mu Xinan Wang Keliang Yin Bao' an Li Zhengliang Li Yukuan Guo Shuying Yao Zhaogui He Guiying Zhang Yue'e Lu Hongjin Huang Zhicheng Zhu Sizhao Yang Jiedong Wang Yinxi Ye Sujuan and Xu Tongchun.

This paper presents a comprehensive evaluation on the Devonian-Carboniferous Boundary (DCB) sectionin Nanbiancun. Guilin. Guangxi on the basis of Palaeontological, biostratigraphical and sedimentarypetrological studies as well as microfacies analysis. REE and trace element analysis and isotopic dating. The DCB at this section conforms to the definition of this boundary and essentially measure up the criteriaand conditions for selection of the boundary stratotype. Up to 14.fossil groups are contained in the section. Thesection presents a general biostratigraphical framework with multispecies fossils zones, assemblage zones andmultiple groups of fossils and has latent preponderant conditions for magnetostratigraphic andchronostratigraphic studies. The boundary and point occur in a persistent and continuous monofacialcarbonate succession. and the section is located in a tourist city with convenient communication, where variousfacies of DCB sections are developed. allowing the correlation within a small area. So it is an ideal candidateboundary stratotype.

关键词： Guilin Guangxi A Comprehensive Evaluation on the Devonian-Carboniferous Boundary Stratotype Candidate Section in Nanbiancun

SOME LATE WENLOCK-EARLY LUDLOW (SILURIAN) GRAPTOliTES FROM NORTHWEST CHINA

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古生物学报 2002年第3期 369-371页

作者： NI Yu Nan 1) and SONG li Sheng 2) 1) nanjing institute of geology and {4., the{4., nanjing 210008 2) Xi’an institute of geology and Mineral Resources, Xi’an 710054

ＴｈｅｍａｔｅｒｉａｌｄｅａｌｔｗｉｔｈｉｎｔｈｉｓｐａｐｅｒｗａｓｃｏｌｌｅｃｔｅｄｆｒｏｍｆｏｕｒｍｅａｓｕｒｅｄｓｅｃｔｉｏｎｓａｔＨｕａｎｇｕｔａｎ ,ＺｉｙａｎｇｏｆＳｈａａｎｘｉ,ａｔＪｉａｎｎｉｇｏｕａｎ... 详细信息

ＴｈｅｍａｔｅｒｉａｌｄｅａｌｔｗｉｔｈｉｎｔｈｉｓｐａｐｅｒｗａｓｃｏｌｌｅｃｔｅｄｆｒｏｍｆｏｕｒｍｅａｓｕｒｅｄｓｅｃｔｉｏｎｓａｔＨｕａｎｇｕｔａｎ ,ＺｉｙａｎｇｏｆＳｈａａｎｘｉ,ａｔＪｉａｎｎｉｇｏｕａｎｄＡｎｚｉｇｏｕ ,ＴｅｗｏｏｆｓｏｕｔｈｗｅｓｔｅｒｎＧａｎｓｕａｎｄａｔＸｉａｏｈｕｌｉｓｈａｎ ,ＥｊｉｎＱｉｏｆｎｏｒｔｈｗｅｓｔｅｒｎＩｎｎｅｒＭｏｎｇｏｌｉａ (Ｔｅｘｔｆｉｇ .1) .ＡｔＨｕａｎｇｕｔａｎ ,ｔｈｅＳｉｌｕｒｉａｎｒｏｃｋｓｃｏｎｓｉｓｔｏｆｃａｒｂｏｎａｃｅｏｕｓｍｕｄｙａｎｄｓｉｌｔｙｓｌａｔｅｓ ,ａｂｏｕｔ 4.7ｍｔｈｉｃｋ .ＴｈｅｂａｓｅａｎｄｔｈｅｔｏｐｏｆｔｈｅｓｅｃｔｉｏｎａｒｅｂｏｔｈｆａｕｌｔｅｄａｇａｉｎｓｔｔｈｅＬｏｗｅｒＯｒｄｏｖｉｃｉａｎｂｅｄｓ.ＧｒａｐｔｏｌｉｔｅｓｏｂｔａｉｎｅｄｉｎｃｌｕｄｅＰｒｉｓｔｉｏｇｒａｐｔｕｓｐｓｅｕｄｏｄｕｂｉｕｓ (Ｂｏｕｃˇｅｋ ) ,Ｐ .ｓｈａａｎｘｉｅｎｓｉｓｓｐ .ｎｏｖ .,Ｐ .ｖｕｌｇａｒｉｓ (Ｗｏｏｄ) ,Ｐ .ｃｆ.ｔｕｍｅｓｃｅｎｓ (Ｗｏｏｄ)ａｎｄＳａｅｔｏｇｒａｐｔｕｓｓｐ .ｉｎｄｉｃａｔｉｎｇａｌａｔｅＷｅｎｌｏｃｋｅａｒｌｙＬｕｄｌｏｗａｇｅ .ＡｔＡｎｚｉｇｏｕ ,ｇｒａｐｔｏｌｉｔｅｓａｒｅｐｒｅｓｅｒｖｅｄｉｎｓｉｌｔｙａｎｄｃａｌｃａｒｅｏｕｓｓｌａｔｅｓ,ｗｈｉｃｈｗｅｒｅｐｒｅｖｉｏｕｓｌｙａｓｓｉｇｎｅｄｔｏｔｈｅＬｌａｎｄｏｖｅｒｙＡｎｚｉｇｏｕＦｏｒｍａｔｉｏｎ .Ａｆｔｅｒｃｒｉｔｉｃａｌｉｄｅｎｔｉｆｉｃａｔｉｏｎ ,ｔｈｅｇｒａｐｔｏｌｉｔｅｆａｕｎａｉｓｃｏｍｐｏｓｅｄｏｆｏｎｌｙｔｈｒｅｅｅａｒｌｙＬｕｄｌｏｗｓｐｅｃｉｅｓ :Ｓａｅｔｏｇｒａｐｔｕｓｓｐ .,Ｐｒｉｓｔｉｏｇｒａｐｔｕｓｆｏｒｂｅｓｉ (Ｂｅｒｒｙ)ａｎｄＰ .ｊａｅｇｅｒｉＨｏｌｌａｎｄ ,ＲｉｃｋａｒｄｓａｎｄＷａｒｒｅｎ .ＡｔＪｉａｎｎｉｇｏｕ ,ａｃｏｌｌｅｃｔｉｏｎｗａｓｍａｄｅｆｒｏｍｓａｎｄｙｓｌａｔｅｓｏｆｔｈｅＬｕｄｌｏｗＨｏｎｇｓｈｕｉｇｏｕＦｏｒｍａｔｉｏｎ,ｃｏｎｔａｉｎｉｎｇｇｒａｐｔｏｌｉｔｅｓＢｏｈｅｍｏｇｒａｐｔｕｓｂｏｈｅｍｉｃｕｓ(Ｂａｒｒａｎｄｅ )ａｎｄＬｏｂｏｇｒａｐｔｕｓｐｒｏｇｅｎｉｔｏｒｃｕｄａｌｅｎｓｉｓＲｉｃｋａｒｄｓｅｔａｌ.ＡｔＸｉａｏｈｕｌｉｓｈａｎ ,ｌａｔｅＷｅｎｌｏｃｋｅａｒｌｙＬｕｄｌｏｗｂｅｄｓａｒｅｍａｉｎｌｙｃｏｍｐｏｓｅｄｏｆｇｒａｙｗａｃｋｅｓａｎｄｓｉｌｔｙｓｌａｔｅｓｙｉｅｌｄｉｎｇｇｒａｐｔｏｌｉｔｅｓＰｒｉｓｔｉｏｇｒａｐｔｕｓｊａｅｇｅｒｉＨｏｌｌａｎｄｅｔａｌ.,Ｐ .ｐｓｅｕｄｏｄｕｂｉｕｓ(Ｂｏｕｃˇｅｋ) ,Ｐ .ｐａｒｖｕｓＵｌｓｔａｎｄＭｏｎｏｇｒａｐｔｕｓｕｎｃｉｎａｔｕｓＴｕｌｌｂｅｒｇ .Ｓｐｅｃｉｍｅｎｓａｒｅｐｏｏｒｌｙｐｒｅｓｅｒｖｅｄ ,ｂｕｔｗｏｒｔｈｗｈｉｌｅｒｅｐｏｒｔｉｎｇ ,ａｓｌａｔｅＷｅｎｌｏｃｋｅａｒｌｙＬｕｄｌｏｗｇｒａｐｔｏｌｉｔｅｓｈａｖｅｌｉｔｔｌｅｂｅｅｎｋｎｏｗｎｆｒｏｍｔｈｅｖａｓｔａｒｅａｏｆＮｏｒｔｈｗｅｓｔＣｈｉｎａ .Ｈｅｒｅｔｏｔａｌｌｙｅｌｅｖｅｎｓｐｅｃｉｅｓ ,ｂｅｌｏｎｇｉｎｇｔｏｆｉｖｅｇｅｎｅｒａ,ｏｆＨｏｍｅｒｉａｎ (ＵｐｐｅｒＷｅｎｌｏｃｋ)ａｎｄＧｏｒｓｔａｉｎ (ＬｏｗｅｒＬｕｄｌｏｗ) ｇｒａｐｔｏｌｉｔｅｓａｒｅｄｅｓｃｒｉｂｅｄａｎｄｒｅｖｉｅｗｅｄ ,ｏｆｗｈｉｃｈＰｒｉｓｔｉｏｇｒａｐｔｕｓｐｓｅｕｄｏｄｕｂｉｕｓ(Ｂｏｕｃˇｅｋ) ,Ｐ .ｖｕｌｇａｒｉｓ (Ｗｏｏｄ) ,Ｐ .ｆｏｒｂｅｓｉ (Ｂｅｒｒｙ) ,Ｐ .ｊａｅｇｅｒｉＨｏｌｌａｎｄｅｔａｌ.,Ｐ .ｐａｒｖｕｓＵｌｓｔａｎｄＬｏｂｏｇｒａｐｔｕｓｐｒｏｇｅｎｉｔｏｒｃｕｄａｌｅｎｓｉｓＲｉｃｋａｒｄｓｅｔａｌ.ａｒｅｒｅｃｏｒｄｅｄｉｎＣｈｉｎａｆｏｒｔｈｅｆｉｒｓｔｔｉｍｅ .ＴｈｅｄｅｓｃｒｉｐｔｉｏｎｏｆａｎｅｗｓｐｅｃｉｅｓｏｆＰｒｉｓｔｉｏｇｒａｐｔｕｓｉｓａｓｆｏｌｌｏｗｓ

关键词： graptolites Wenlock Ludlow Silurian Northwest ChinaSummary The material dealt with in this paper was collected from four measured sections at Huangutan Ziyang of Shaanxi at Jiannigou and Anzigou Tewo of southwestern Gansu and

A new method to prepare clean cuticular membrane from fossil leaves with thin and fragile cuticles

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Science China Earth sciences 2011年第2期54卷 223-227页

作者： WANG li1,2 & LENG Qin1,3 1 State Key Laboratory of Palaeobiology and Stratigraphy,nanjing institute of geology and {4.,{4. academy of sciences,nanjing 210008,China 2 Graduate School of chinese academy of sciences,Beijing 10004.,China 3 Department of Science and Technology,Bryant University,Smithfield RI 02917,USA 1. State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China2. Graduate School of Chinese Academy of Sciences Beijing 100049 China3. Department of Science and Technology Bryant University Smithfield RI 02917 USA

Leaf cuticle analysis has long been a powerful tool for fossil plant identification, systematics, and palaeoclimatological recon- struction. In recent decades the application of stomatal frequency data that are relied on precise calculation of stomata on plant fossil cuticles to reconstruct ancient atmospheric CO2 concentration made the preparation of cuticular membrane with sufficient size a critical technique in palaeoclimatological research. However, for plants with originally thin and fragile cuticles, e.g., most deciduous plants, conventional techniques sometimes fail to obtain cuticular membranes with sufficient size, or sometimes unable to recover any. This has largely hampered the usage of fossil cuticle analysis in palaeobotanical and palaeo- climatological research. Here, we describe a new method using clear nail polish as a medium to ＂strengthen＂ the originally thin and fragile cuticles prior to maceration procedures. We demonstrate the method by using middle Eocene Metasequoia fossils that were notorious for the difficulty of recovering large-sized clean cuticular membranes due to their thin and fragile nature. Metasequoia, with well-documented and widely-distributed fossil records since the Late Cretaceous and with a living repre- sentative, 114. glyptostroboides, as a comparative reference, bas been widely used as a model genus for the study of evolution of plants, palaeoclimatological reconstruction, and plant adaptation to climate changes. But its deciduous habit produces thin cuticles and makes the preparation of clean cuticular membranes a tedious process. The new method successfully allows us to recover its delicate cuticular membranes with sufficient sizes for SEM observation and stomatal frequency analysis.

关键词： fossil leaf cuticle Metasequoia new method thin and fragile cuticle SEM observation stomatal frequency CO2

Isotopic feature and uranium dating of the volcanic rocks in the Okinawa Trough

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中国科学：地球科学英文版 2006年第4期49卷 375-383页

作者： HUANG Peng1,2, li Anchun1, HU Ningjing2,3, FU Yongtao1& MA Zhibang4.1. institute of Oceanology, chinese academy of sciences, Qingdao 266071, China 2. Graduate School of the chinese academy of sciences, Beijing 100039, China 3. institute of Soil Science, chinese academy of sciences, nanjing 210008, China 4. institute of geology and Geophysics, chinese academy of sciences, Beijing 100029, China 1. institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China 2. Graduate School of the chinese academy of sciences Beijing 100039 China 3. institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China 4. institute of geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Volcanic rocks from the northern and middle Okinawa Trough were dated by ura- nium-series dating method. Differential fractions using magnetic procedure were designed to separate samples. New report on the ages and isotopic data of rocks in the northern trough (especially black pumice) was discussed. Based on the uranium dates and Sr-Nd isotopic ratio, magmatic evolution process of the Okinawa Trough was noted. Firstly, there have been wide silicic volcanic activities in the Okinawa Trough from late Pleistocene to present, and the volcanic rocks can be divided into three subgroups. Secondly, magma generally came from PREMA source area under the Okinawa Trough. Magmatic evolution in the northern trough was similar to the middle, but different to the south. Finally, volcanic activities indicated that opening of the southern Okinawa Trough did not happen due to the collision between Luson Arc and Eurasian Plate until the early Pleistocene.

关键词： Okinawa Trough, black pumice, uranium-series dating, Sr-Nd isotopic ratio, magmatic evolution.

Discovery of agglutinated foraminifers from the Longzhaogou Group in eastern Heilongjiang Province

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Science China Earth sciences 2004年第2期47卷 122-127页

作者： li Gang & YU Shanmao1. State Key Laboratory of Paleobiology Stratigraphy, nanjing institute of geology and Paleontology,{4.,{4., China 2.108th Coal-prospecting Team of Geological Bureau, NE China and Inner Mongolia Coal Company, Jixi 158100, China Correspondence should be addressed to li Gang (email: gangli@***) 1. State Key Laboratory of Paleobiology Stratigraphy Nanjing Institute of Geology and Paleontology Chinese Academy of Sciences 210008 Nanjing China 2. 108th Coal-prospecting Team of Geological Bureau NE China and Inner Mongolia Coal Company 158100 Jixi China

The low diversity agglutinated foraminifers are recovered from the Qihulin Formation of the Longzhaogou Group in eastern Heilongjiang, China. The foraminiferal fauna consists of 9 species of 5 genera. The common members are Cribrostomoides nonioninoides (Reuss), Haplophragmoides concavus (Chapman), H. gigas minor Nauss. Although the diagnostic zonal taxa are absent in the agglutinated fauna, according to the global stratigraphic distribution of the above-mentioned species, and the associated Pseudohaploceras ammonite fauna, the foraminiferal fauna may be of a Barremian-Aptian (Early Cretaceous) age.

关键词： Early Cretaceous, agglutinated foraminifers, Longzhaogou Group, eastern Heilongjiang, China.