塔里木盆地西部博古孜河剖面记录的亚洲内陆干旱化及其成因

发布时间：2018-04-14 13:10

本文选题：塔里木盆地 + 晚中新世-更新世　；参考：《干旱区资源与环境》2017年03期

【摘要】：亚洲内陆干旱化是全球新生代大陆环境变化中最引人瞩目的重大事件,其形成与演化与青藏高原隆升和新生代全球变冷等因素密切相关。文中对塔里木盆地西部博古孜河剖面晚中新世-早更新世湖相-扇三角洲相沉积序列进行了初步的色度和地球化学测试与分析。结果表明:塔里木盆地干旱化至少始于5.7Ma,3.7-2.1Ma,干旱化逐渐增强。3.7-2.1Ma,受局地地形的影响,山体隆升截留西风水汽,发生局部水文事件。约2.1Ma后,盆地持续干旱化。我们认为晚中新世-更新世青藏高原、天山的隆升,帕米尔高原的隆升与向北推挤以及阿来依谷地的关闭是5.7Ma以来亚洲内陆干旱化的主要驱动因素。
[Abstract]:Asian inland drought is the most important event in the global Cenozoic continental environmental change. Its formation and evolution are closely related to the uplift of the Qinghai-Tibet Plateau and the Cenozoic global cooling.A preliminary chrominance and geochemical analysis of the late Miocene early Pleistocene lacustrine fan delta facies in the Bogozi River section of the western Tarim Basin has been carried out.The results show that the aridity of Tarim Basin begins at least from 5.7 Ma-3.7-2.1 Ma.The drought gradually increases .3.7-2.1 Ma.The mountain uplift withdraws westerly water vapor and local hydrological events occur due to the influence of local topography.After about 2.1Ma, the basin continued to dry.We consider that the late Miocene-Pleistocene Qinghai-Tibet Plateau, the uplift of the Tianshan Mountains, the uplift and push northward of the Pamir Plateau and the closure of the Alayi Valley are the main driving factors for the Asian inland drought since 5.7Ma.
【作者单位】：安阳师范学院资源环境与旅游学院;兰州大学资源环境学院西部环境教育部重点实验室;中国科学院青海盐湖研究所盐湖资源与化学重点实验室;
【基金】：国家自然科学基金项目(41602366;41301222) 河南省高等学校重点科研项目(16A170006) 安阳师范学院大学生创新基金项目(ASCX/2016-Z131)资助
【分类号】：P532

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