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首页> 外文期刊>Quaternary International >Chronology for terraces of the Nalinggele River in the north Qinghai-Tibet Plateau and implications for salt lake resource formation in the Qaidam Basin
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Chronology for terraces of the Nalinggele River in the north Qinghai-Tibet Plateau and implications for salt lake resource formation in the Qaidam Basin

机译：青藏高原北部那令格勒河阶地的年代学及其对柴达木盆地盐湖资源形成的影响

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摘要

The Nalinggele River, located in the northern Qinghai-Tibetan Plateau, is the largest river originating from the northern slope of the eastern Kunlun Mountains and flowing into the enclosed Qaidam Basin. Controversy exists whether the formation of its terraces reflects the history of the plateau uplift, or climate changes, or both. The salt lakes in the enclosed Qaidam Basin fed by this river bear an unusual world-class enrichment of lithium and boron elements, which are critical resources for regional economy. The concentration of lithium is one of the highest found in brine resource in the world, and sourced from the upstream water of the river. The chronology of the river terraces is essential to understand the plateau uplift history, the regional climate change, the evolution of the terminal salt lakes, and the process of enrichment of the valuable elements. However, the age constraint for the terraces of the rivers in the east Kunlun Mountains is still limited and debated, and no dating work has been reported yet for terraces of the Nalinggele River. Five terraces were identified in this river. In this study, the terraces were dated using quartz optically stimulated luminescence (OSL) dating. The results indicate that the OSL ages (similar to 7.5 ka, similar to 9.9 ka, similar to 11.3 ka, and similar to 13.1 ka) of the four terraces (T1, T2, T3, and T4) are consistent with geomorphic relationship, and that they formed since similar to 13.1 ka and were probably triggered by climatic change rather than by the plateau uplift. The sediment of T5 is too coarse to collect OSL samples and not dated. Based on our dating we confirm the previous view that the lithium concentration in the terminal salt lakes should have initiated since 15-13 ka. We further propose that the formation of salt lakes and the enrichment of their resources in the Qaidam Basin should have occurred mainly in interglacial periods (e.g. the Holocene), a warm and humid period, not as previously thought to be in the glacial periods, a dry and cold period, and that during the glacial periods the basin was mainly under wind erosion. (C) 2016 Elsevier Ltd and INQUA. All rights reserved.
机译：纳林格勒河位于青藏高原北部，是最大的河流，源于昆仑山东部的北坡，流向封闭的柴达木盆地。是否存在阶地的形成是否反映高原隆升的历史，气候变化或两者兼而有争议。封闭的柴达木盆地中的盐湖由这条河喂养，它们具有世界一流的锂和硼元素富集现象，这是区域经济的重要资源。锂的浓度是全球盐水资源中发现的最高浓度之一，其来源是河流的上游水。河流阶地的年代顺序对于了解高原隆升历史，区域气候变化，末期盐湖的演变以及有价值元素的富集过程至关重要。然而，东昆仑山河流阶地的年龄限制仍然受到限制和争论，纳林格勒河阶地的约会工作尚未见报道。在这条河中确定了五个梯田。在这项研究中，使用石英光学激发发光（OSL）测年法对梯田进行了测年。结果表明，四个阶地（T1，T2，T3和T4）的OSL年龄（类似于7.5 ka，相似9.9 ka，相似11.3 ka和相似13.1 ka）与地貌关系一致，并且它们的形成类似于13.1 ka，可能是由于气候变化而不是高原隆升引起的。 T5的沉积物太粗糙，无法收集OSL样品，并且没有过时。根据我们的约会，我们确认了先前的观点，即自15-13 ka以来，末期盐湖中的锂浓度应该已经开始。我们进一步建议，柴达木盆地盐湖的形成及其资源的丰富应该主要发生在冰川期（例如全新世），即温暖和潮湿的时期，而不是以前认为的冰川时期。干旱和寒冷时期，而在冰川时期，盆地主要受到风蚀。 （C）2016 Elsevier Ltd和INQUA。版权所有。

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  • 来源
    《Quaternary International》 |2017年第ptab期|12-20|共9页
  • 作者

    Chang QiuFang; Lai ZhongPing; An FuYuan; Wang HaiLei; Lei YanBin; Han FengQing;

  • 作者单位

    Chinese Acad Sci, Key Lab Salt Lake Geol & Environm, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China|Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    China Univ Geosci, State Key Lab Biogeol & Environm Geol, Sch Earth Sci, Wuhan 430074, Peoples R China|Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Key Lab Salt Lake Geol & Environm, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China;

    CAGS, MLR Key Lab Saline Lake Resources & Environm, Inst Mineral Resources, Beijing 100037, Peoples R China;

    Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Key Lab Salt Lake Geol & Environm, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Luminescence dating; Terraces of Nalinggele River; Salt lakes in the Qaidam Basin; Kunlun Mountains in Qinghai-Tibetan Plateau (QTP);

    机译：发光年代法;那令格勒大河;柴达木盆地的盐湖;青藏高原的昆仑山;

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