Chemical Weathering of Detrital Sediments in the Taklamakan Desert, Northwestern China
文献类型：期刊论文
| 作者 | Zhu, Bingqi; Yang, Xiaoping |
| 刊名 | GEOGRAPHICAL RESEARCH
 |
| 出版日期 | 2009-03-01 |
| 卷号 | 47期号:1页码:57-70 |
| 关键词 | chemical weathering detrital sediments CIA geomorphology desert China |
| ISSN号 | 1745-5863 |
| DOI | 10.1111/j.1745-5871.2008.00555.x |
| 文献子类 | Article |
| 英文摘要 | Based on the analysis of major-element compositions of detrital sediments from the Taklamakan Desert of northwestern China, this paper aims to study chemical weathering in a hyper-arid desert environment. The major-element compositions are basically similar to the Upper Continental Crust but show a clear enrichment of CaO and depletion of Na(2)O and K(2)O, indicating the enrichment of carbonates and the decomposition of sodium and potassium silicates. The indexes of chemical alteration are relatively low and correlate negatively with the content of Na(2)O, implying that the degree of chemical weathering is weak and mainly controlled by the weathering of sodium feldspars. An A-CN-K model demonstrates that the detrital sediments from the Taklamakan Desert have a high homogeneity in the trend of chemical weathering. They are weathered less than sands and soil in many other Chinese deserts, and also less than similar detrital sediments in many other countries. This evidence suggests a low degree of mineralogical maturity in the Taklamakan Desert. The aeolian sediments of different ages have similar indexes of chemical weathering, suggesting that the degree of chemical weathering was consistent in the Taklamakan Desert throughout the period of aeolian deposition. The low degree of chemical weathering is caused principally by extreme aridity, rapid rejuvenation of detrital sediments associated with strong aeolian processes, and an intensive input of fluvial deposits, as well as a lack of vegetation. Due to the high concentration of erodible minerals, the desert is quite vulnerable to soil erosion and land degradation. |
| WOS关键词 | NORTHERN CHINA ; THAR DESERT ; NEGATIVE FEEDBACK ; ATMOSPHERIC CO2 ; SILICATE ROCKS ; WESTERN CHINA ; LOESS PLATEAU ; GEOCHEMISTRY ; PROVENANCE ; TEMPERATURE |
| WOS研究方向 | Geography |
| 语种 | 英语 |
| WOS记录号 | WOS:000263744300007 |
| 出版者 | WILEY-BLACKWELL PUBLISHING, INC |
| 资助机构 | Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; 40425011) ; 40425011) ; 40425011) ; 40425011) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; 40425011) ; 40425011) ; 40425011) ; 40425011) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; 40425011) ; 40425011) ; 40425011) ; 40425011) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; Chinese Academy of Sciences(kzcx2-yw-119) ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; National Natural Science Foundation of China(40671020 ; 40425011) ; 40425011) ; 40425011) ; 40425011) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70339]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yang, Xiaoping |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Bingqi,Yang, Xiaoping. Chemical Weathering of Detrital Sediments in the Taklamakan Desert, Northwestern China[J]. GEOGRAPHICAL RESEARCH,2009,47(1):57-70. |
| APA | Zhu, Bingqi,&Yang, Xiaoping.(2009).Chemical Weathering of Detrital Sediments in the Taklamakan Desert, Northwestern China.GEOGRAPHICAL RESEARCH,47(1),57-70. |
| MLA | Zhu, Bingqi,et al."Chemical Weathering of Detrital Sediments in the Taklamakan Desert, Northwestern China".GEOGRAPHICAL RESEARCH 47.1(2009):57-70. |
入库方式： OAI收割
来源：地质与地球物理研究所
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