Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.catena.2024.107892 |
| Northwestern Chinese record of Cenozoic global events | |
| Guo, Xuelian; Retallack, Gregory J.; He, Lusheng; Li, Zaijun; Liu, Jinhao; Wang, Ronghua; Liu, Xiuming; Wang, Weibin | |
| 通讯作者 | Guo, XL |
| 来源期刊 | CATENA
 |
| ISSN | 0341-8162 |
| EISSN | 1872-6887 |
| 出版年 | 2024 |
| 卷号 | 239 |
| 英文摘要 | Global cooling over the past 45 million years has been well established from deep sea isotopic records, and one explanation has been the cooling effect of uplift of the Tibetan Plateau. Other explanations for cooling are initiation of circum-Antarctic circulation, and carbon sequestration by newly evolved grasslands. The Lanzhou Basin is located at the intersection of the Tibetan Plateau, eastern monsoon region, and northwestern arid region of China, so well placed to evaluate Tibetan Plateau effects. This paper infers paleoclimatic changes from a long sequence of Cenozoic paleosols within the Xiliugou, Yehucheng and Xianshuihe Formations, in the Lanzhou Basin of Gansu. Eleven distinct kinds of paleosols (pedotypes) were recognized in the field from root traces, soil horizons and soil structures. These pedotypes were then intepreted as soils by R-mode factor analysis and molecular weathering ratios of major element geochemical composition. Supporting data from compactioncorrected depth to carbonate in the paleosols show that paleoclimate was persistently arid to semi-arid from the middle Eocene to the middle Miocene, but interrupted by transient climatic warm-wet events, which correlate with marine oxygen-isotopic events and large igneous province basaltic eruptions. At 42, 34, 22, 18, 17 and 16 Ma, spikes of mean annual temperature (MAT) and mean annual precipitation (MAP) are evident from the paleosols, at times also recognized in global marine isotopic and stomatal index carbon dioxide records. At 37, 33 and 23 Ma, low MAP and MAT estimated from paleosols of the Lanzhou Basin coincide with glacial advances, and marine oxygen isotopic spikes and low CO2. Paleosols of the Lanzhou Basin record global paleoclimate events during the middle Eocene to the middle Miocene, rather than variation in Tibetan Plateau uplift. The rain shadow from Tibetan Plateau maintained generally arid to subhumid eolian deposition in Gansu for the past 50 million years. |
| 英文关键词 | Paleosol Paleoclimate events Elemental geochemistry Cenozoic |
| 类型 | Article |
| 语种 | 英语 |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:001197273400001 |
| WOS关键词 | TIBETAN PLATEAU ; CENTRAL-ASIA ; CLIMATE ; PALEOSOLS ; BASIN ; MONSOON ; PROXIES ; UPLIFT ; SOILS ; MA |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/403144 |
| 推荐引用方式 GB/T 7714 | Guo, Xuelian,Retallack, Gregory J.,He, Lusheng,et al. Northwestern Chinese record of Cenozoic global events[J],2024,239. |
| APA | Guo, Xuelian.,Retallack, Gregory J..,He, Lusheng.,Li, Zaijun.,Liu, Jinhao.,...&Wang, Weibin.(2024).Northwestern Chinese record of Cenozoic global events.CATENA,239. |
| MLA | Guo, Xuelian,et al."Northwestern Chinese record of Cenozoic global events".CATENA 239(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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