Formation of Ulan Buh desert and its environmental changes during the Holocene |
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| Authors: | Xi CHUN Fahu CHEN Yuxin FAN Dunsheng XIA Hui ZHAO |
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| Institution: | (1) Institute of Geography Sciences, Inner Mongolia Normal University, Hohhot, 010022, China;(2) National Laboratory of Western China’s Environmental Systems, Lanzhou University, Lanzhou, 730000, China;(3) Key Laboratory of Desert and Desertification, Environmental and Engineering Research Institute for Cold and Arid Regions, Chinese Academy of Sciences, Lanzhou, 730000, China |
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| Abstract: | Extensive investigations and studies on topography, sedimentary and chronology show new evidence for the formation and evolution
of the Ulan Buh desert during early Holocene. Evidence on clay-sand strata and plant roots under interdune lowlands, lake
shorelines covered by plenty of Corbicula largillierti and large amounts of dry salt lakes in the central region of the desert prove that many megalakes existed in the hinterland
of Ulan Buh desert. Several OSL samples collected from Aeolian sands overlying lacustrine sediments in profiles around Jilantai
Salt Lake and interdune lowlands in the southern Ulan Buh desert suggest that the desert began around 7 ka B.P.. The formation
of Ulan Buh desert may have resulted from the shrinking of Jilantai megalakes and sands blown from exposed loose sediments.
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Translated from Journal of Desert Research, 2007, 27(6): 927–931 译自: 中国沙漠] |
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| Keywords: | Ulan Buh desert palaeolake evolution environmental evolution aeolian deposition |
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