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| DOI | 10.1016/j.earscirev.2020.103220 |
| Provenance of Thal Desert sand: Focused erosion in the western Himalayan syntaxis and foreland-basin deposition driven by latest Quaternary climate change | |
| Garzanti E.; Liang W.; Andò S.; Clift P.D.; Resentini A.; Vermeesch P.; Vezzoli G. | |
| 发表日期 | 2020 |
| ISSN | 00128252 |
| 卷号 | 207 |
| 英文摘要 | As a latest Pleistocene repository of Indus River sand at the entry point to the Himalayan foreland basin, the Thal dune field in northern Pakistan stores crucial information that can be used to reconstruct the erosional evolution of the Himalayan-Karakorum orogen and the changes in the foreland-basin landscape that took place between the Last Glacial Maximum and the early Holocene. This comprehensive provenance study of Thal Desert sand integrates previously existing petrographic, heavy-mineral, mineral-chemical, isotopic, and geochronological databases with original bulk-sediment geochemistry, zircon-age, and Nd-isotope data. Dune sand is low in quartz and rich in feldspars, volcanic, metavolcanic and metabasite grains, contains a very rich transparent heavy-mineral suite including hypersthene and common zircon grains dated as Late Cretaceous to early Paleogene, and is characterized by high Mg, Sc, V, Co, Ni, Cu concentrations and by εNd values as high as −3.5. Together, these data indicate that ~40% of Thal dune sand was supplied by erosion of the Kohistan arc, a proportion that far exceeds the one assessed for modern Upper Indus sand. Greater detrital supply from the Kohistan arc indicates notably different conditions of sediment generation, during a period in which the sediment-transport capacity of the Upper Indus in the dry lowlands was reduced and volumes of sand were extensively reworked by wind and accumulated in dune fields across the foreland basin. In the early Holocene, the renewed strength of the South Asian monsoon and consequently markedly increased water and sediment discharge led to incision of the Thal and Thar dune fields by the Indus River and its Punjab tributaries draining the Himalayan front directly hit by heavy monsoonal rains. © 2020 Elsevier B.V. |
| 关键词 | Detrital-zircon geochronologyFocused erosionHimalaya-KarakorumIndus River, Delta, and FanKohistan arcSand petrography and geochemistryVariability of εNd values |
| 英文关键词 | climate variation; dune; foreland basin; Last Glacial Maximum; monsoon; paleoclimate; provenance; Quaternary; regional climate; Himalayas |
| 语种 | 英语 |
| 来源期刊 | Earth Science Reviews
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/203717 |
| 作者单位 | Laboratory for Provenance Studies, Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milano, 20126, Italy; Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, United States; London Geochronology Centre, Department of Earth Sciences, University College London, London, C1E 6BT, United Kingdom |
| 推荐引用方式 GB/T 7714 | Garzanti E.,Liang W.,Andò S.,et al. Provenance of Thal Desert sand: Focused erosion in the western Himalayan syntaxis and foreland-basin deposition driven by latest Quaternary climate change[J],2020,207. |
| APA | Garzanti E..,Liang W..,Andò S..,Clift P.D..,Resentini A..,...&Vezzoli G..(2020).Provenance of Thal Desert sand: Focused erosion in the western Himalayan syntaxis and foreland-basin deposition driven by latest Quaternary climate change.Earth Science Reviews,207. |
| MLA | Garzanti E.,et al."Provenance of Thal Desert sand: Focused erosion in the western Himalayan syntaxis and foreland-basin deposition driven by latest Quaternary climate change".Earth Science Reviews 207(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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