| Late Neogene environmental changes in the central Himalaya related to tectonic uplift and orbital forcing | |
| Wang, Yang; Deng, Tao; Flynn, Lawrence; Wang, Xiaoming; Yin, An; Xu, Yingfeng; Parker, William; Lochner, Eric; Zhang, Chunfu; Biasatti, Dana; ywang@magnet.fsu.edu | |
| 2012 | |
| 发表期刊 | J ASIAN EARTH SCI
 |
| ISSN | 1367-9120 |
| 卷号 | 44页码:62—76 |
| 摘要 | The linkage between tectonic forces and climate evolution remains a matter of much debate and speculation. Here we present high-resolution oxygen and carbon isotope data from an ancient lake basin in the central Himalaya. These data, together with sedimentologic evidence, reveal major changes in drainage systems and depositional settings at similar to 7.2, similar to 5.5 and similar to 3.2 Ma. These environmental changes appear to be driven by regional-scale tectonics. The oxygen isotope record also reveals alternating wet and dry climates with periodicities of 24 and 100 kyr that were likely controlled by orbital forcing. Paleo-temperatures, estimated using a fossil-based oxygen isotope "paleo-thermometer", are 21 +/- 6 degrees C at similar to 7 Ma, which is 19 +/- 6 degrees C higher than the present-day mean annual temperature in the same area. The much warmer environment inferred here is consistent with fossil mammalian and pollen assemblages and sediment clay mineralogy as well as carbon isotope data from fossil tooth enamels and paleosol carbonates. The estimated temperature difference would require the study area to have been raised by similar to 2-2.5 km since 7 Ma to its current elevation of 4100-4500 m above sea level. This result can be interpreted as either indicating the presence of a low-altitude intermountain basin in the hanging wall of the already formed Main Central Thrust or a protracted development of a north-trending rift basin that has experienced changes in drainage system and depositional environment through time. (C) 2011 Elsevier Ltd. All rights reserved. |
| 关键词 | Main Central Thrust Isotope-based Paleoaltimetry Eocene-oligocene Transition Central North-america Tibetan Plateau Stable-isotope Late Miocene Southern Tibet Climate-change Paleoelevation Reconstructions |
| URL | 查看原文 |
| 收录类别 | SCI收录 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/4327 |
| 专题 | 古哺乳动物研究室 |
| 通讯作者 | ywang@magnet.fsu.edu |
| 推荐引用方式 GB/T 7714 | Wang, Yang,Deng, Tao,Flynn, Lawrence,et al. Late Neogene environmental changes in the central Himalaya related to tectonic uplift and orbital forcing[J]. J ASIAN EARTH SCI,2012,44:62—76. |
| APA | Wang, Yang.,Deng, Tao.,Flynn, Lawrence.,Wang, Xiaoming.,Yin, An.,...&ywang@magnet.fsu.edu.(2012).Late Neogene environmental changes in the central Himalaya related to tectonic uplift and orbital forcing.J ASIAN EARTH SCI,44,62—76. |
| MLA | Wang, Yang,et al."Late Neogene environmental changes in the central Himalaya related to tectonic uplift and orbital forcing".J ASIAN EARTH SCI 44(2012):62—76. |
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