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首页> 外文期刊>Journal of Asian earth sciences >Lacustrine tempestite and its geological significance in the Cenozoic study of the Qaidam Basin
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Lacustrine tempestite and its geological significance in the Cenozoic study of the Qaidam Basin

机译：柴达木盆地新生代研究中的拉古斯特林风化岩及其地质意义

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摘要

During the Cenozoic a typical lacustrine tempestite deposition was developed in the Lulehe and Xichagou sections of the Qaidam Basin. The sedimentary structures of these two sections above are examined here in detail, which consist of storm erosion, storm tear, storm wave and rapid storm-generated sedimentary structures after storm processes, such as groove casts, scour structures, cutoff structures, hummocky cross-stratification (HCS), parallel bedding and graded bedding. On the basis of these sedimentary characteristics and the vertical facies sedimentary sequence, the causes of the sedimentary succession are analyzed and a Cenozoic sedimentary model of the Qaidam Basin containing shallow proximal, transitional and deep distal tempestites is established. According to the tempestite scale and HCS wavelength, the Cenozoic storm was obviously more intense in the basin's Upper Ganchaigou formation than that in the Lower Youshashan formation. This variation indicates that a paleoclimatic transition largely corresponded with the second uplift of the whole Qinghai-Tibet Plateau. The discovery of a Cenozoic tempestite in the Qaidam Basin is significant in the paleogeographic, paleodimate and paleostructural fields, which provides a new insight in further study of the Qinghai-Tibet Plateau uplift.
机译：在新生代，柴达木盆地的吕勒河段和西岔沟段发育了典型的湖相风云母沉积。此处详细检查了以上两个部分的沉积结构，包括风暴侵蚀，风暴撕裂，风暴波和风暴过程后由风暴迅速产生的沉积结构，例如沟槽型铸件，冲刷结构，截断结构，山形交叉口。分层（HCS），平行垫层和渐变垫层。根据这些沉积特征和垂直相沉积顺序，分析了沉积演替的成因，建立了柴达木盆地新生代沉积模型，其包含浅近端，过渡带和深层远侧的陨石。从暴风雨规模和HCS波长来看，盆地上干柴沟组的新生代风暴明显比油沙山下层的新生代风暴更为强烈。这种变化表明古气候过渡在很大程度上与整个青藏高原的第二次隆升相对应。柴达木盆地新生代暴风雨的发现在古地理，古地理和古构造领域具有重要意义，为进一步研究青藏高原隆升提供了新的见解。

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  • 来源
    《Journal of Asian earth sciences》 |2014年第10期|157-167|共11页
  • 作者

    Fengjie Li; Yuchuan Yang; Junwu Li; Chengjin Yang; Tingyong Dai; Junxing Zhao; Haisheng Yi;

  • 作者单位

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China,State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Chengdu 610059, China;

    Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China,State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Chengdu 610059, China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Tempestites; Paleogeography; Sedimentary; Qaidam Basin; Qinghai-Tibet Plateau; Uplift;

    机译：风暴古地理沉积;柴达木盆地青藏高原隆起;

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