Lake Evolution in the Tengger Desert, Northwestern China, during the Last 40,000 Years

Quaternary Research - Tập 44 Số 2 - Trang 171-180 - 1995
Hans-Joachim Pachur1, Bernd Wünnemann1, Hucai Zhang1
1Geomorphologisches Laboratorium der Freien Universität Berlin, 14195 Berlin and Department of Geographical Sciences, Lanzhou University, Lanzhou 730 000, Peoples' Republic of China

Tóm tắt

AbstractClimatic changes inferred from lacustrine deposits and lake-level fluctuations in northwestern and central China are mainly based on paleoclimatic records from the Tibetan Plateau, while there is still a lack of data relating to the semiarid/arid desert regions of Inner Mongolia. In the Tengger Desert, different paleolake levels at Baijian Hu are documented by six paleoshorelines and stratified lake carbonates. The highest lake level occurred ca. 39,000 14C yr B.P. and prevailed over about 16,000 km2. From sediment structure, geochemical composition, and ostracods we infer humid/cool conditions until 23,000 14C yr B.P. In the northern Badanjilin Desert at Gaxan Nur/Sogu Nur, high lake levels can be deduced from mollusc-bearing paleobeaches and lake carbonates, which have been dated to 34,000 14C yr B.P. and indicate a lake that covered some 32,000 km2. After ca. 20,000 yr B.P. the climate became dry with increased eolian activity and decreasing lake levels. Reestablishment of wet conditions occurred ca. 13,000 yr B.P. The Holocene is represented by stratified lake deposits that alternate with fluvial and eolian deposits, indicating a longterm oscillating trend toward arid conditions. The existence of widespread freshwater lakes during the late Pleistocene indicates a semihumid climate without an accompanying fall in temperature to arctic conditions.

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Tài liệu tham khảo

Campo van, 1993, Pollen-and diatoms-inferred climatic and hydrological changes in Surnxi Co Basin (western Tibet) since 13,000 yr B.P., 300

Huang, 1980, Radiocarbon dating of samples from several salt lakes on the Tibet Plateau and their sedimentary cycles., 990

Chen, 1987, Evolution of salt lakes in late Pleistocene in Qaidam Basin, Qinghai Province, China., “Proceedings of Sino-Australian Quaternary Symposium, 1984”, 83

Zhang, 1992, “Climate of China.”

Wang, 1991, Late Cenozoic Lake Sediments in China., “Quaternary Geology and Environment in China”

Meyerhoff, 1991, “China—Stratigraphy, Paleogeography and Tectonics.”, 10.1007/978-94-011-3770-6

Fort, 1989, Lacustrine sedimentation in a semiarid alpine setting: An example from Ladakh, northwestern Himalaya., 332

Fang, 1991, Lake evolution during the past 30,000 years in China, and its implication for environmental changes., 37

An, 1991, Magnetic Susceptibility evidence of monsoon variation on the Loess Plateau of Central China during the last 130,000 years., 29

Min, 1991, “Quaternary Map of China and Adjacent Sea Areas, 1: 10,000,000.”

Hövermann, 1986, Zur Klimageschichte Hochund Ostasiens., 173

Gao, 1993, Preliminary research on Holocene deserts of NW-monsoon area in China., 1

Yang, 1991, Geomorphologische Untersuchungen in Trockenräumen NW-Chinas unter besonderer Berücksichtigung von Badanjilin und Takelamagan, 1

Li, 1993, Ostracod Fauna of the late Pleistocene and its Paleogeographic Significance in the Region East of Bangong Lake in Tibet., 35

Hofmann, 1994, Geomorphologische Untersuchungen zur jungquartären Klimaentwicklung des Helan Shan und seines westlichen Vorlandes.

Liu, 1988, Quaternary history of the temperate forests of China., 1

Rost, 1994, Paleoclimatic field studies in and along the Qinling Shan (central China)., 107

Shi, 1991, “Quaternary Glacial Distribution Map of the Qinghai-Xizang (Tibet) Plateau, 1:3,000,000.”

Lister, 1991, Lake Qinghai, China: Closed-basin lake levels and the oxygen isotope record for ostracoda since the latest Pleistocene., 141

1985, “Report of Agricultural Regionalification of Minqin County, Gansu Province,”, 157

Fontes, 1993, Stable isotope and radiocarbon balances of two lakes (Sumxi Co, Longmu Co) from 13,000 BP., 875

Sing, 1990, Vegetational and seasonal climatic changes since the last full glacial in the Thar Desert, northwestern India., 351

Fortak, 1982, “Meteorologie.”

Kinzelbach, 1991, Die Körbchenmuscheln Corbicula fluminalis, Corbicula fluminea und Corbicula fluviatilis in Europa (Bivalvia Corbiculidae)., 215

Huang, 1987, Geochronological study on the sediments in Qarhan Lake., “Proceedings, Sino-Australian Quaternary Symposium, 1984”, 106

Fang, 1993, Lake evolution during the last 3000 years in China and its implications for environmental change., 175

Sun, 1991, Paleoenvironment of the last glacial stage in Loess Plateau.

An, 1993, Episode of a strengthened summer monsoon climate of younger Dryas Age on the Loess plateau of central China, 45

Domrös, 1988, “The Climate of China.”, 10.1007/978-3-642-73333-8

Hövermann, 1993, Pleistocene glaciations in eastern and central Tibet—preliminary results of Chinese-German joint expeditions., 85

Li, 1991, The environmental effects of the uplift of the Qinghai-Xizang Plateau., 479

Jacobs, 1951, Large scale aspects of energy transformation over the oceans., 1057

Zhu, 1986, “Deserts in China,”, Inst, of Desert Research, Academia Sinica, 1

Kelts, 1989, Geological fingerprints of climate history: A cooperative study of Qinghai Lake., 167

Yan, 1983, The sporo-pollen assemblage in the Luo 4 drilling of Lop Lake in Uygur Autonomous Region of Xinjiang and its significance., 5, 75

Li, 1994, Ostracod Fauna and Environmental Changes During the Past 17,000 Years in the Western Tibet, 47

Pachur, 1994, Ftoodplain deposits on the watershed between Huang He and Chang Jiang, Gansu Province, NW China., 97

Chen, 1986, Late Pleistocene evolution of salt lakes in the Qaidam Basin, Qinghai Province, China., 131

Gasse, 1991, A 13.000-year climate record from western Tibet., 742

Pachur, 1991, Paleoclimatic implications of late Quaternary lacustrine sediments in western Nubia, Sudan., 257

Begin, 1985, Dead Sea and Lake Lisan levels in the last 30,000 years: A preliminary report., 1

Zhang, 1989, On the model of Post-Glacial paleomagnetic fluctuation in Qinghai Lake region., 66

Yang, 1986, “The Geology of China,”, Oxford Monographs on Geology and Geophysics 3

Chawla, 1992, Thermoluminescence chronology of sand profiles in the Thar desert and their implications., 25