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Tectonics and Topography of the Tibetan Plateau in early miocene

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Acta Geologica Sinica(English Edition) 2014年第2期88卷 410-424页

作者： WU Zhenhan YANG Yan Patrick J. BAROSH WU Zhonghai ZHANG Yaoling Chinese Academy of Geological Sciences P.J. Barosh and Associates Institute of Geomechanics Chinese Academy of Geological Sciences

early miocene stratigraphy,major structural systems,magmatic emplacement,volcanic eruption,vegetation change and paleo-elevation were analyzed for the Tibetan Plateau after regional geological mapping at a scale of 1：250,000 and related researches,revealing much more information for tectonic evolution and topographic change of the high plateau caused by Indian-Asian continental *** deposits of dolostone,dolomite limestone,limestone,marl,sandstone and conglomerate of weak deformation formed extensively in the central Tibetan Plateau,indicating that vast lake complexes as large as 100,000-120,000 km2 existed in the central plateau during early *** assemblages contained in the lacustrine strata indicate the disappearance of most tropical-subtropical broad-leaved trees since early miocene and the flourishing of dark needle-leaved trees during early *** vegetation changes adjusted for latitude and global climate variations demonstrate that the central Tibetan Plateau rose to ca.4,000-4,500 m and the northeastern plateau uplifted to ca.3,500-4,000 m before the early *** thrust and crustal thickening occurred in the areas surrounding central Tibetan Plateau in early miocene,formed Gangdise Thrust System （GTS） in the southern Lhasa block,Zedong-Renbu Thrust （ZRT） in the northern Himalaya block,Main Central Thrust （MCT） and Main Boundary Thrust （MBT） in the southern Himalaya block,and regional thrust systems in the Qaidam,Qilian,West Kunlun and Songpan-Ganzi *** basins formed in early miocene along major thrust systems,*** Siwalik basin along MCT,Yalung-Zangbu Basin along GTS and ZRT,southwestern Tarim depression along West Kunlun Thrust,and large foreland basins along major thrust systems in the northeastern margin of the *** volcanic eruptions formed in the Qiangtang,Hoh-Xil and Kunlun blocks,porphyry granites and volcanic eruptions formed in the Nainqentanglha and Gangdise Mts.,and leuco

关键词： Lacustrine deposits vast lakes elevation change regional thrust system early miocene Tibetan Plateau

A New Fossil Termite (Isoptera,Stolotermitidae,Stolotermes) from the early miocene of Otago,New Zealand

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 705-709页

作者： Uwe KAULFUSS Anthony C.HARRIS Daphne E.LEE Department of Geology University of OtagoPO Box 56Dunedin 9054New Zealand Otago Museum PO Box 6202Dunedin 9059New Zealand

The forewing of a termite from early miocene lake sediments in Otago, southern New Zealand is figured and described. It exhibits the generic characters of the damp-wood termite Stolotermes Hagen, but differs from forewings of the known species in size and venation pattern and is described as Stolotermes kupe sp. nov. S. kupe represents the first confident record of fossil Stolotermitidae and extends the fossil record of the family back to the early miocene. It also is the first direct evidence of fossil Isoptera from New Zealand, though silicified termite faecal pellets, referable to Kalotermes brauni, have been previously described. S. kupe indicates that Stolotermitidae has been present in the Australasian region since at least the early miocene.

关键词： early miocene fossil termite Isoptera Stolotermes new species Otago Fouiden Maar Gondwana

Evidence of late early miocene aridification intensification in the Xining Basin caused by the northeastern Tibetan Plateau uplift

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Evidence of late early Miocene aridification intensification...

The first Choerolophodon (Proboscidea, Gomphotheriidae) skull from China

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Chunxia Zhang Guoqiao Xiao Zhengtang Guo Haibin Wu Qingzhen Hao Key Laboratory of Cenozoic Geology and Environment Institute of Geology and Geophysics Chinese Academy of Sciences CAS Center for Excellence in Tibetan Plateau Earth Sciences State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences

Few early miocene terrestrial climate records exist from the Asian interior and as a result the evolution of Central Asian aridification and the driving forces behind it remain unclear. Here we report sedimentary, mineralogy and geochemical proxies from an early miocene sedimentary sequence(ca. 22.1 to 16.5 Ma) from Xining Basin on the northeastern side of the Tibetan Plateau. Multiple proxies indicate a change of sedimentary facies of a distal alluvial fan from subfluvial to subatmospheric under a dominantly arid climate coupled with a clear two-stage climate change. During 22.1–19.7 Ma(Unit I), the enrichment of I/S(irregular mixed-layers of illite and smectite) content, high values of a*/L*(redness/lightness), and stronger degree of chemical weathering suggest relatively warm and humid climate conditions during a generally arid climate. During 19.7–16.5 Ma(Unit II), the increase of chlorite and dolomite content, the upward decrease of a*/L*, and weaker degree of chemical weathering than Unit I suggest gradually increasing aridity since ca. 19.7 Ma. Comprehensive comparisons among records from central western China demonstrate that the aridification since ca. 19.7 Ma is widespread in northeastern part of the Tibetan Plateau. The climate changes in inner Asia are different to that of globalscale changes, which indicates that global climate changes and the retreat of the Para-Tethys Sea possibly had little influences on this region. The episodic, but persistent tectonic uplift of the north and northeastern Tibetan Plateau during the early miocene likely played a key role in the aridification of the Xining Basin.

关键词： Inner Asia early miocene Clay minerals Aridification Tibetan Plateau uplift

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Science China Earth Sciences 2011年第9期54卷 1326-1337页

作者： WANG ShiQi DENG Tao Key Laboratory of Evolutionary Systematics of Vertebrates Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China

Here we report the first discovery of a relatively complete skull of Choerolophodon from the late early miocene Dalanggou quarry of Linxia Basin, Gansu Province in China. The skull is low and elongated, with two enamel-less and out ward-and-upward curved incisors and the choerolophodont molars. These characters indicate that the new specimen can be as signed to the genus Choerolophodon, as it is quite distinct from other common gomphotheres in northern China such as Gom photherium, Platybelodon, and Sinomastodon. The skull is also primitive in possessing laterally-expanded zygomatic arches, anteriorly-positioned orbits, weakly-developed cheek teeth cement, and retention of a P4. Prior to this discovery, Cho erolophodon was found primarily from the middle-late miocene of Africa, Eastern Europe, and western and southern Asia. The discovery of this new material expands the known temporal and spatial distributions of this taxon and helps us better un derstand the phylogeny, evolution, and adaptive radiation of gomphotheres in early miocene of China.

关键词： gomphotheres Choerolophodon Linxia Basin early miocene China

Plant-Arthropod Associations from the Lower miocene of the Most Basin in Northern Bohemia(Czech Republic):A Preliminary Report

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 903-914页

作者： Jakub PROKOP Torsten WAPPLER Stanislav KNOR Zlatko KVACEK Department of Zoology Charles UniversityPragueCzech Republic Steinmann Institute Section PalaeontologyUniversity of BonnBonnGermany Institute of Geology and Palaeontology Charles UniversityPragueCzech Republic

Terrestrial plants and insects currently account for the majority of the Earth＇s biodiversity, and approximately haft of insect species are herbivores. Thus, insects and plants share ancient associations that date back more than 400 Myr. However, investigations of their past interactions are at the preliminary stages in Western Europe. Herein, we present the first results of our study of various feeding damage based on a dataset of nearly 3500 examined plant specimens from the Lower miocene of the Lagerstaette Bflina Mine in the Most Basin, Czech Republic. This site provides a unique view of the Neogene freshwater ecosystems. It has long been studied by scientists working in different branches of sedimentology, paleobotany, and paleozoology. The fossils are preserved in three characteristic horizons overlaying the coal seam （Clayey Superseam Horizon, Delta Sandy Horizon, and Lake Clayey Horizon）, reflecting paleoenvironmental changes in a short time period of development. The trace fossils are classified as functional feeding groups or ＂guilds＂, without searching for a direct cause or a recent analog host relation. Approximately 23% of specimens of dicotyledonous plant leaves were found to be damaged and associated with some leaf ＂morphotypes＂. Deciduous plant-host taxa, and those with a chartaceous texture typical of riparian habitats, were frequently damaged, such as Populus, recorded with two species Populus zaddachii and Populus populina （57.9% and 31% herbivory levels, respectively）, followed by Acer, Alnus, and Carya, averaging almost 30% of damaged leaves/leaflets. There has been evidence of 60 damage types （DT） representing all functional feeding groups recorded at the Bflina Mine, including 12 types of leaf mines and 16 gall- type DT. In total, Lower miocene of the Lagerstaette Bilina Mine exhibits a high level of external foliage feeding types （23.7%）, and a low level of more specialized DT, such as galls （4.3%） and leaf mines （〈1%）. A broader comparison b

关键词： plant-insect interaction paleoecology climate change Neogene early miocene Most Basin BflinaMine Czech Republic

THE ARAGONIAN VERTEBRATE FAUNA OF XIACAOWAN,JIANGSU──9. OCHOTONIDAE (LAGOMORPHA, MAMMALIA)

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古脊椎动物学报(中英文） 1995年第1期 57-60页

作者： Wu Wenyu(Institute of Vertebrate Paleontology and Paleoanthropology the Chinese Academy of Sciences Beijing 100044)

A new species of Alloptox is described in this paper. All the material was gathered from three localities (Songlinzhuang, Zhengji and Shuanggou) of Sihong County, Jiangsu Province. For detailed information on geological and stratigraphical background and others the reader is referred to Li et al. (1983) and Qiu and Lin (1986). Almost all here described 113 specimens (Songlinzhuang 68, Shuanggou 27,Zhengji 18) are isolated teeth with exception of three fragments of upper and lower jaws with few teeth. All specimens of these three localities are treated as members of one and the same population. However the measurements and figures of specimens from each locality are separately represented. The figures are represented as left ones, the abbreviated word "inv." is used under the figures of right teeth. All specimens are stored in IVPP under the inventory numbers *** present paper is one of the series studies of Xiacaowan Fauna of miocene from Sihong. In all previous papers the fauna was assigned to Middle miocene. Qiu et al. (1990) adapted the boundry between early and middle miocene to the European one. Therefore Xiacaowan fauna was reassigned to early miocene.I am very grateful to Prof. Wang Banyue for showing me the specimens of Sinolagomys cf. ulungurensit for comparison. Thanks are due to my colleagues: *** Banyue, Tong Yongsheng, Qiu Zhuding and Zheng Shaohua who critically read the manuscript.

关键词： Sihong Jiangsu early miocene Ochotonidae

DISCOVERY OF TWO MID-TERTIARY MAMMALIAN FAUNAS FROM HAIYUAN, NINGXIA, CHINA

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古脊椎动物学报(中英文） 1994年第4期 294-296页

作者： Wang Banyue (Institute of Vertebrate Paleontology and Paleoanthropolopy, Acodemia Sinica, Beijing, 100044)Yan Zhiqiang,Lu Yanjun,Chen Guoxin (Ningxia Geological and Mineral Prospecting Institution, Yinchuan, 750004)

In Haiyuan County of south Ningxia red beds are well developed. They were noticed early in this century and discussed several times since then. They were first referred to the Eocene (Andersson, 1923; Hsieh, 1923, 1925), but later called Pliocene Kuyuan (=Guyuan) series and Ssukoutze (=Sikouzi) series (Yuan, 1925). Then they were variously allocated as Eocene Kuyuan Formation, Tertiary Kansu (=Gansu) Formation, or subdivided into Paleogene Kuyuan Formation and Neogene Kansu ***, mainly based on lithology, they have been subdivided into Eocene (Sikouzi Formation), Oligocene, early Middle miocene (Hongliugou Formation), and later Middle miocene (Ganghegou Formation). The Oligocene in the Ningxia area is also considered to include early Oligocene, Middle Oligocene (Qingshuiying Formation),and Later Oligocene (Hejiakouzi Formation). However, in the Haiyuan area the geological ages of these subdivisions remain uncertain, and the Oligocene is not subdivided because of lack of mammal fossils and other data that can help determine geological age.

关键词： Haiyuan, Ningxia early miocene Middle Oligocene Mammalia