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Distribution patterns of the Jurassic ostreids (Bivalvia) from tanggula of China

Science China Earth Sciences 2001年第S1期44卷 112-120页

作者：沙金庚 Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

Distribution of the Jurassic ostreids (Bivalvia) from tanggula area of China includes three patterns, which are (1) Tethys: containing Liostrea birmanica and Eligmus rollandi, (2) western Europe and northern Tethys: consisting of Gryphaea (Bilobissa) bilobata; and (3) Global: composed of Actinostreon gregareum and Nanogyra nana. However, they are all limited between palaeolatidudes 60℃South and North. Actinostreon gregareum originated in the Sinemurian of northern Chile and it entered Kenya and Madagascar in the Toarcian, but there is no reliable Si-nemurian-Toarcian A gregareum fossil record in continental margins between Chile and Kenya and Madagascar. Such distribution patterns and dispersal processes have demonstrated that (1) during the Jurassic all seas and oceans were connected to each other; (2) the Tethys and the western European epicontinental seas did produce some endemic taxa; (3) the distribution of these ostreids was most likely controlled by latitudes and creature ecology; and (4) A, gregareum underwent a trans-Pacific dispersal from east to west.

关键词： tanggula Jurassic ostreids distribution patterns.

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Glacier change in the tanggula Mountains, Tibetan Plateau,in 1969-2015

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Journal of Mountain Science 2019年第11期16卷 2663-2678页

作者： DUAN Hong-yu YAO Xiao-jun LIU Shi-yin GAO Yong-peng QI Miao-miao LIU Juan ZHANG Da-hong LI Xiao-feng College of Geography and Environment Sciences Northwest Normal UniversityLanzhou 730070China Yunnan Key Laboratory of International Rivers and Transboundary Eco-security Kunming 650091China Institute of International Rivers and Eco-Security Yunnan University Kunming 650091China

To improve our knowledge of glacier change in the tanggula Mountains located in the northeast of the Tibetan Plateau,we delineated outlines of the glaciers in 1991 and 2015 using Landsat TM/OLI images and compared them with the reported glacier data in the First Chinese Glacier Inventory in 1969 and the Second Chinese Glacier Inventory in *** comparisons showed that the glacier area and ice volume decreased by 524.8 km2 and 37 km3,*** majority of the glacier area loss was concentrated in the area class of 1-5 km2,between 5300 m and 5500 m in elevation,on north and east facing slopes and in the Dam Qu River *** glacier changes exhibited spatial and temporal *** glacier retreat rate gradually increased from 1969 to 2015,and the rate in the east was higher than that in the *** 1969 to 2015,the warming rate in the tanggula Mountains was 0.38°C/10a,while the annual precipitation only increased by 0.4%.The slight increase in the amount of precipitation made a limited contribution to glacier change,while the change in temperature led to noticeable shrinkage of the *** to the retreat or stagnation of most glaciers in the study area,there were 10 glaciers that experienced clear advance in 1986-2015 with noticeable increases in both area and *** or not these 10 glaciers are surge glaciers requires further study.

关键词： Glacier change Glacier inventory Advancing glaciers Climate change tanggula Mountains Tibetan Plateau

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BIOGEOGRAPHIC RELATIONS OF THE JURASSIC PECTINOIDA AND OSTREOIDA (BIVALVIA) BETWEEN tanggula AND OTHER AREAS

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地学前缘 2000年第S1期7卷 139-141页

作者： Sha Jingeng (Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing 210008, China)

There are abundant Bajocian—Tithonian bivalves in the main ridge of the tanggula Mountains of northern Qinghai—Xizang Plateau, China. After figuring the common and coeval species between tanggula and other areas (Fig. 1), and tracing the temporal and spacial historical distribution of the bivalves very capable of dispersion, some Jurassic bivalve biogeographic items, particularly the biogeographic relations, have been lit up. In the known 21 taxa of the Jurassic Pectinoida and Ostreoida from the main ridge of the tanggula Mountains, there are 12 (57%) common and coeval species in northern Tethys, 13 (62%) common and coeval species in southern Tethys and 12 (57%) in Kachchh—southern Xizang area. It has demonstrated that there existed intermigration of bivalves between tanggula and various parts of Tethys. Although there is no coeval species between tanggula and western Australia, in these two areas there exist 6 (29%) close range common species of which 4 (19%) coevaity existed in western Australia and India Plate. tanggula fauna is, therefore, still very close to that of western Australia. However, there are 15 (71%) common and 14 (67%) coevality species between the main ridge of the tanggula Mountains and northwestern Europe, among the common species, 8 (38%) ones have lower limitation (first occurrence) in northwestern Europe but only 2 (10%) taxa are older in the main ridge of the tanggula Mountains. It is very clear that pectinite and ostrea fauna of Tethys, particularly the main ridge of the tanggula Mountains and Europe had very close relation and most tanggula’s or northern Tethyan taxa migrated from northwestern Europe.

关键词： biogeographic relation Jurassic Bivalvia tanggula of norther n Qinghai—Xizang plateau Tethys northwestern Eu rope Pacific

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移动与安全并重——基于tanggula平台的笔记本电脑问世

每周电脑报

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每周电脑报 2005年第36期 41-41页

作者：袁斌

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