Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals
Distant Taklimakan Desert as an Important Source of Aeolian Deposits on the Chinese Loess Plateau as Evidenced by Carbonate Minerals
复制标题
遥远的塔克拉玛干沙漠是中国黄土高原风成沉积物的重要来源——碳酸盐矿物的证据
DOI：
10.1029/2018gl081551
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发表时间：
2019
影响因子：
5.2
通讯作者：
Ji Junfeng
中科院分区：
文献类型：
--
作者：
Meng Xianqiang;Liu Lianwen;Zhao Wancang;He Tong;Chen Jun;Ji Junfeng
一般认为，中国黄土高原上的风成黄土主要来源于邻近的上风干旱区，主要包括柴达木沙漠、阿拉善干旱区和鄂尔多斯沙漠。然而，风成物质的矿物学和地球化学成分显示了这些相邻源区和CLP之间的一些不一致之处。在这里，我们比较了大量样品中碳酸盐矿物的分布，以及来自上风沙漠的<63 μm部分与来自CLP的六个黄土剖面。结果表明，青藏高原黄土中富含碎屑白云岩和全碳酸盐岩，且主要集中在塔克拉玛干沙漠而非邻近物源区。这一发现表明，遥远的塔克拉玛干沙漠是一个重要的来源，风成沉积物的CLP，调和CLP和邻近地区之间的矿物和地球化学的不一致。
It is generally agreed that the aeolian loess on the Chinese Loess Plateau (CLP) is derived from adjacent upwind arid areas, mainly including the Qaidam Desert, Alxa arid area, and Ordos Desert. However, the mineralogical and geochemical compositions of aeolian materials show several inconsistencies between these adjacent source areas and the CLP. Here, we compare the distribution of carbonate minerals in bulk samples and the <63‐μm fraction from upwind deserts to six loess sections from the CLP. The results show that the detrital dolomite and total carbonate, which are abundant in the loess of the CLP, are concentrated in the Taklimakan Desert rather than adjacent source areas. This finding suggests that the distant Taklimakan Desert is an important source of aeolian deposits on the CLP, reconciling the mineralogical and geochemical inconsistencies between CLP and adjacent areas.