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首页> 外文期刊>Quaternary Science Reviews: The International Multidisciplinary Review Journal >Paleoglaciation of Shaluli Shan, southeastern Tibetan Plateau
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Paleoglaciation of Shaluli Shan, southeastern Tibetan Plateau

机译：PA Leo glaciation of SHA戮力s韓, southeastern Tibetan plateau

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Reconstructing the paleoglaciation of the Tibetan Plateau is critical to understanding linkages between regional climate changes and global climate changes, and here we focus on the glacial history of the Shaluli Shan, an area of the southeastern Tibetan Plateau that receives much of its precipitation from monsoon flow. Based on field investigation, geomorphological mapping, and 10Be exposure dating of moraines, we identify glacial deposits from the Late Glacial, with minimum ages at 13.0 ± 1.2 -17.1 ± 1.6 ka, global Last Glacial Maximum (gLGM) at 21.6 ± 2.0 ka, and pre-gLGM at 102.3 ± 10.0-183.6 ± 17.0 ka. These ages are consistent with and significantly extend the known range from most prior chronological work using terrestrial cosmogenic nuclides in this area, and include a set of dates for the Kuzhaori moraine that raise questions about prior chronologies based on the electron spin resonance technique. Ice caps about 4000 km~2 in size covered the Haizishan Plateau and the Xinlong Plateau during the global LGM, with large glaciers extending far down outlet valleys. The presence of ice cap glaciation, here, contrasts strongly to glaciation elsewhere in the Shaluli Shan and more central regions of the Tibetan Plateau where ice expansion remained constricted to valleys. This work provides important insights into the paleoclimate pattern and monsoon evolution of the Tibetan Plateau over past glacial cycles and indicates that the Shaluli Shan has a glacial chronology more consistent with the Northern Hemisphere paleo-ice sheets than other areas of the Tibetan Plateau.
机译：重建青藏高原的古冰川对了解区域气候变化与全球气候变化之间的联系至关重要，在这里，我们重点介绍东南部青藏高原沙柳里山的冰川历史，该地区的大部分降水来自季风流。根据野外考察，地貌图绘制和莫兰10Be暴露年代，我们确定了晚冰川期的冰川沉积物，其最小年龄为13.0±1.2 -17.1±1.6 ka，全球最后冰川期（gLGM）为21.6±2.0 ka，和pre-gLGM为102.3±10.0-183.6±17.0 ka。这些年龄与该地区使用陆上宇宙成因核素的大多数以前的年代学工作相一致，并且大大扩展了已知的范围，并且包括库扎里冰m的一组日期，这些日期提出了关于基于电子自旋共振技术的先前年代学的问题。全球LGM期间，海子山高原和新龙高原覆盖着约4000 km〜2的冰盖，大型冰川延伸至出口谷底。在这里，冰盖冰河的存在与沙柳利山和青藏高原中部地区的冰河形成强烈反差，那里的冰膨胀仍然局限于山谷。这项工作提供了对过去冰川周期青藏高原的古气候模式和季风演变的重要见解，并表明，与其他青藏高原地区相比，萨留利山的冰川年代学更符合北半球古冰片。

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