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| DOI | 10.1016/j.jseaes.2024.106126 |
| Early Miocene sand wedge deposits in Southwestern Tarim Basin and Implications for the Uplift of the Northern Tibetan Plateau | |
| 发表日期 | 2024 |
| ISSN | 1367-9120 |
| EISSN | 1878-5786 |
| 起始页码 | 267 |
| 卷号 | 267 |
| 英文摘要 | The uplift of the Tibet Plateau and its climatic effects have long been a hot topic in academic research. However, there is still significant controversy regarding the uplift history and related climate changes along the northern margin of the plateau. In this paper, we present sand wedge deposits from the base of the Wuqia Group (-20 Ma) on the southwestern Tarim Basin, representing the oldest reported sand wedges in the Tibetan Plateau. A comprehensive study was conducted on lithostratigraphy, sedimentary environment, and macroscopic -microscopic features of the sand wedge deposits. The results indicate that the lithostratigraphic succession preserving the sand wedge deposits consists mainly of lenticular conglomerates and cross-bedded gravelly sandstone interbedded with medium -thin-bedded mudstone, consistent with the braided fluvial environment. The sand wedge deposits commonly exhibit a V-shape geometry and are filled with gravelly sandstone, with the gravels arranged parallel to the walls of the wedge. The clasts of the wedge-filled sandstone are well-rounded and show a unimodal grain size distribution. The quartz surfaces commonly display dish-shaped and crescent-shaped impact features, indicating an eolian origin and an arid climate. Based on the relationship between the formation temperature of modern sand wedges, the atmospheric temperature gradient, and altitude, the reconstructed paleo-elevation of the sand wedge deposits at the base of the Wuqia Group in the southwestern Tarim Basin is approximately - 1000 m. These results indicate that the northern margin of the Tibet Plateau had already reached an elevation of - 1000 m during the Early Miocene, forming a seasonal arid and cold climate. |
| 英文关键词 | Tarim Basin; Northern Tibetan Plateau; Sand wedge deposits; Early Miocene; Paleo-elevation |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001235199300001 |
| 来源期刊 | JOURNAL OF ASIAN EARTH SCIENCES
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/285840 |
| 作者单位 | Yunnan University; Yunnan University; University of Queensland; Griffith University |
| 推荐引用方式 GB/T 7714 | . Early Miocene sand wedge deposits in Southwestern Tarim Basin and Implications for the Uplift of the Northern Tibetan Plateau[J],2024,267. |
| APA | (2024).Early Miocene sand wedge deposits in Southwestern Tarim Basin and Implications for the Uplift of the Northern Tibetan Plateau.JOURNAL OF ASIAN EARTH SCIENCES,267. |
| MLA | "Early Miocene sand wedge deposits in Southwestern Tarim Basin and Implications for the Uplift of the Northern Tibetan Plateau".JOURNAL OF ASIAN EARTH SCIENCES 267(2024). |
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