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New species and new records of diatoms from Lake Fuxian,china

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Journal of Systematics and Evolution 2010年第1期48卷 65-72页

作者： 1 Yan-ling li 1 Zhi-Jun GONG 2.Chun-Chao WANG 1 Ji SHEN 1(State Key Laboratory of Lake Science and Environment,{2. institute of Geography and limnology,chinese Academy of sciences,{2. 2.0008,china) 2.{2. institute of {12. and palaeontology,chinese Academy of sciences,{2. 2.0008,china) (State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China) (nanjing institute of {2. and palaeontology Chinese Academy of Sciences Nanjing 210008 China)

One new species,four newly recorded genera,and two newly recorded species of diatoms are described from *** are Sellaphora fuxianensis ***,Sellaphora Mereschkowsky,Karayevia Round & Bukhtiyarova,Placoneis Mereschkowsky,Fallacia Stickle & Mann,Placoneis prespanensis Levkov,Krstic & Nakov,and Fallacia lucinensis(Hustedt) *** taxa were collected from Lake Fuxian in Yunnan Province,*** species were observed with light and scanning electron microscopes,and their taxonomic characters are discussed.

关键词： china diatom new records new species.

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 ({2. institute of geology and palaeontology, chinese Academy of sciences, nanjing 2.0008, china College of Resource and Environment of Guizhou University, Guiyang 550003, china) nanjing institute of {2. and palaeontology Chinese Academy of Sciences Nanjing 210008 China College of Resource and Environment of Guizhou University Guiyang 550003 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 2. 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.

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 {2. and palaeontology, Academia Sinica 2.his 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

Male spike strobiles with Gnetum affinity from the Early Cretaceous in western liaoning,Northeast china

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Journal of Systematics and Evolution 2009年第2期47卷 93-102页

作者： 1,2.huang-Xing GUO 3Jin-Geng SHA 4li-Zeng BIAN 5Yin-Long QIU 1(Department of Palaeobotany and Palynology,nanjing {2. of geology and Paleontology,chinese Academy of sciences,nanjing 2.0008,china) 2.Laboratory of Biodiversity and Biogeography,Kunming {2. of Botany,chinese Academy of sciences,Kunming 6502.4,china) 3(State Key Laboratory of Palaeobiology and Stratigraphy,nanjing {2. of geology and palaeontology,chinese Academy of sciences,nanjing 2.0008,china) 4(College of Earth sciences,nanjing University,nanjing 2.0093,china) 5(Department of Ecology & Evolutionary Biology,The University Herbarium,University of Michigan,Ann Arbor,MI 48109-1048,USA) Department of Palaeobotany and Palynology Nanjing Institute of Geology and Paleontology Chinese Academy of Sciences Nanjing 210008 China Laboratory of Biodiversity and Biogeography Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China College of Earth sciences Nanjing University Nanjing 210093 China Department of Ecology & Evolutionary Biology The University Herbarium University of Michigan Ann Arbor MI 48109–1048 USA

A fossil with Gnetum affinity was found in the Jianshangou Member(Barremian Age) of the Yixian Formation(Lower Cretaceous Epoch) of the Jehol Group in western liaoning,northeastern *** single fossil specimen is represented by both elongate-cylindrical male spike strobiles which borne within a nodal bract of cauliflorous *** spike strobiles have apparent nodes,invisible internodes,and numerous verticillate involucral *** microsporangiate units within involucral collars are not *** male spike strobiles with verticillate involucral collars occur exclusively in Gnetum;hence,the fossil strobiles are attributed to a new taxon,Khitania columnispicata gen.& ***.,being closely related to *** general isotopic dating suggests an age of Barremian,ca.12.-12. million years(Myr) ago for the Jianshangou *** palaeoecological and palaeoclimatic inference based on the compositions of flora and fauna,and lithological characters of the fossil locality suggests that the fossil plants grew in a subtropical mesophytic forest and under a warmer *** remains of male spike strobiles are the first record of gnetalean *** documents the evolution of the distinct gnetoid morphology and indicates a wider range of distribution of Gnetaceae in the Early Cretaceous than present day.

关键词： biogeography Early Cretaceous Gnetum affinity male spike strobiles northeastern china

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. {2. institute of geology and palaeontology, chinese Academy of sciences, nanjing 2.0008, china 2. Nanjng institute of Geography and limnology, chinese Academy of sciences, nanjing 2.0008, china 3. Environment and Resources College, Lanzhou University, Lanzhou 730000, china 4. Beijing Normal University, Beijing 100875, china nanjing institute of {2. and palaeontology Chinese Academy of Sciences Nanjing China Nanjng institute of Geography and limnology Chinese Academy of Sciences Nanjing China Environment and Resources College Lanzhou University Lanzhou China Beijing Normal University Beijing China

With the support of 18 AMS-14C 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 44.2.to 11 ka B.P. in the Jingning area. Over the period of 44―2. ka B.P. (MIS3), coniferous forests were flourishing, indicating a humid climate with the tem-perature being lower than that of the present. Since 2. 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.

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 10002., china institute of Tibet Plateau Research, chinese Academy of sciences, Beijing 10002., china nanjing institute of Paleontology, chinese Academy of sciences, nanjing 2.0008, 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 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 {2. of geology and palaeontology,chinese Academy of sciences,nanjing 2.0008,china 2.Graduate School of chinese Academy of sciences,Beijing 100049,china 3 Department of Science and Technology,Bryant University,Smithfield RI 02.17,USA State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China Graduate School of chinese Academy of sciences Beijing China Department of Science and Technology Bryant University Smithfield 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

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 {2. of geology and palaeontology, the chinese Academy of sciences, nanjing 2.0008 2. Xi’an {2. 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

Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene

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Science china Earth sciences 2006年第5期49卷 505-517页

作者： WANG Xianyan1,7, LU Huayu1,2. JI Junfeg3, WANG Xiaoyong1,7, ZHAO Jingbo4, HUANG Baochun5 & li Zhen6 1. SKLLQG, institute of Earth Environment, {2. Academy of sciences, Xi’an 710075, china 2. Department of Urban and Resources sciences, nanjing University, nanjing 2.0093, china 3. Department of Earth sciences, nanjing University, nanjing 2.0093, china 4. Department of Geography, Shaanxi Normal University, Xi’an 710062. china 5. institute of geology and Geophysics, {2. Academy of sciences, Beijing 10002., china 6 Department of Geography, Qinghai Normal University, Xining 810008, china 7. Graduate School of the {2. Academy of sciences, Beijing 100039, china SKLLQG Institute of Earth Environment Chinese Academy of Sciences Xi’an China Graduate School of the chinese Academy of sciences Beijing China Department of Urban and Resources sciences Nanjing University Nanjing China Department of Earth sciences Nanjing University Nanjing China Department of Geography Shaanxi Normal University Xi’an China institute of geology and Geophysics Chinese Academy of Sciences Beijing China Department of Geography Qinghai Normal University Xining China

The Red Earth deposit around Xining, northeastern Tibetan Plateau, has beenstudied in terms of soil micro-structure, grain-size distribution, major- and trace-elementchemistry and magne-tostratigraphy. Field investigations indicate that the Red Earth sequenceconsists of 2. visually definable yellow-brown and weakly-developed soils interbedded with reddishstrongly-developed soils, and has a similar structure to the aeolian Red Clay deposit on the chineseLoess Plateau. Grain-size analysis shows that the Red Earth deposit is very fine-grained with anegligible sand fraction ( > 63 μm). Thin-section observations under light microscopy show that thedeposit has a clayey texture and the coarse fraction ( > 10 μm) mainly consists of quartz,feldspar and micas. Pyroxene and hornblende were also observed. This mineralogical composition ofthe coarse fraction is similar to that of the Quaternary loess. In addition, all of the mineralgrains are semi angular semi-angular and are generally finer than 63 μm. There is a good agreementbetween the major and minor trace element chemistry of loess-soil units and the Red Earth *** REE distributions of the loess-soil and the Red Earth deposit are similar in shape, withenriched LREE and fairly flat HREE profiles and a clear negative Eu anomaly. The geochemicalcharacteristics of the Red Earth deposit are also identical to those of upper continental crust,thus indicating a wind-blown origin. Magnetostratigraphic investigation shows that onset of the RedEarth deposition predates 11.4 Ma BP (13.6 Ma at a nearby site). The distribution of the reportedMiocene aeolian loess at Qin''an of the Loess Plateau is still unknown. Our results indicate thatthis aeolian deposit had extended to the northeastern Tibetan Plateau by at least the middleMiocene. The similarity of the element geochemistry between the Red Earth deposit and the overlyingloess shows that they may have similar sources and dynamic transport system, and may indicate thatthe

关键词： Red Earth deposit, Northeastern Tibetan Plateau, aeolian deposit, aridity of Asia, the middle Miocene.