Desertification and dust emission history of the Tarim Basin and its relation to the uplift of northern Tibet
Desertification and dust emission history of the Tarim Basin and its relation to the uplift of northern Tibet
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DOI：
10.1144/sp342.5
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
R. Tada;Hongbo Zheng;Naomi Sugiura;Y. Isozaki;H. Hasegawa;Youbin Sun;Wengang Yang;Ke Wang;
中科院分区：
文献类型：
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作者：
R. Tada;Hongbo Zheng;Naomi Sugiura;Y. Isozaki;H. Hasegawa;Youbin Sun;Wengang Yang;Ke Wang;
喜马拉雅山和青藏高原的隆升与亚洲内陆荒漠化之间的潜在联系是地质学长期以来一直关注的问题。虽然理论上的气候模拟表明两者之间存在密切联系，但没有足够的地质数据来验证这一理论。通过对塔里木盆地西南缘叶城剖面新近系河流相沉积序列的半定量野外观测，确定了风成粉砂岩的成因、沉积方式，确定了风成粉砂岩的形成时间，定量评价了风成粉砂岩沉积的时间演化及其与藏北构造抬升的关系。研究结果表明，藏北隆起、冲积扇形成、塔克拉玛干沙漠沙尘排放与冲积扇上黄土的沉积有着密切的联系。
Abstract The potential links between uplift of the Himalaya and Tibetan Plateau and desertification of inland Asia have been a long-considered problem in geology. Although a close link between the two has been suggested by theoretical climatic simulations, not enough geological data has existed to test the theory. Here, we conducted semi-quantitative field observations of a Neogene fluvial sequence at the Yecheng section on the southwestern margin of the Tarim Basin in order to confirm the origin and mode of deposition of the aeolian siltstone, determine the onset timing, evaluate quantitatively the temporal evolution of its deposition and its relationship to the tectonically driven surface uplift of NW Tibet. The results suggest a close link between the uplift of northwestern Tibet, alluvial fan formation, dust emission from Taklimakan Desert and the deposition of loess on the alluvial fans.