| 青海格尔木早更新世昆仑河砾岩的发现及其地质意义 |
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| 引用本文： | 赵希涛,胡道功,吴中海,刘琦胜,张耀玲,薛腊梅.青海格尔木早更新世昆仑河砾岩的发现及其地质意义[J].地质力学学报,2010,16(1):1-10. |
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| 作者姓名： | 赵希涛 胡道功 吴中海 刘琦胜 张耀玲 薛腊梅 |
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| 作者单位： | 中国科学院地质与地球物理研究所;中国地质科学院地质力学研究所;中国地质大学地球科学与资源学院; |
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| 摘 要： | 昆仑河发源于昆仑山,是格尔木河的重要支流之一。前人所报道的新近纪与第四纪地层,主要集中于昆仑山垭口地区,而在昆仑河—格尔木河谷地中,只有中更新世以来的最新地层,从而提出了发生于1.1～0.6 Ma BP间的"昆仑—黄河运动"的概念。然而在昆仑河谷中发现了厚达20 m的钙质胶结的河流相砾石层(昆仑河砾岩),其分布、特征及其与纳赤台沟组、三岔河组和低阶地沉积等上覆地层的不整合接触关系,以及ESR法测定的该砾石层2个钙质胶结物样品的年龄(分别为1 042±104 ka BP与1 269±126 ka BP)均表明,早在距今1.27～1.42 Ma之前昆仑河—格尔木河河谷已经形成,而且已深切到现今的谷底。此后河谷内的多次切割与堆积,不应是构造运动的结果,而可能是冰期与间冰期气候变化所引起的侵蚀与搬运能力变化造成的。同样,昆仑山相对于柴达木盆地的强烈隆升至少应发生于距今1.27～1.42 Ma之前。
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| 关 键 词： | ESR年龄测定 早更新世 砾石层 昆仑河谷发育 昆仑山隆升 |
| 收稿时间： | 2009/12/20 0:00:00 |
DISCOVERY OF THE EARLY PLEISTOCENE KUNLUNHE CONGLOMERATE IN GOLMUD OF QINGHAI PROVINCE AND ITS GEOLOGICAL SIGNIFICANCE |
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| ZHAO Xi-tao,HU Dao-gong,WU Zhong-hai,LIU Qi-sheng,ZHANG Yao-ling and XUE La-mei.DISCOVERY OF THE EARLY PLEISTOCENE KUNLUNHE CONGLOMERATE IN GOLMUD OF QINGHAI PROVINCE AND ITS GEOLOGICAL SIGNIFICANCE[J].Journal of Geomechanics,2010,16(1):1-10. |
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| Authors: | ZHAO Xi-tao HU Dao-gong WU Zhong-hai LIU Qi-sheng ZHANG Yao-ling and XUE La-mei |
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| Institution: | ZHAO Xi-tao1,HU Dao-gong2,WU Zhong-hai2,LIU Qi-sheng2,ZHANG Yao-ling2,3,XUE La-mei3(1.Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029,China,2.Institute of Geomechanics,Chinese Academy of Geological Science,Beijing 100081,3.College of Earth Science and Resources,China University of Geosciences,Beijing 100083,China) |
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| Abstract: | The Kunlun River originating in the Kunlun Mountains is one of main tributaries of the Golmud River.The reported Neocene and Quaternary strata are mainly distributed in the Kunlun Pass area,whereas in the valley of the Kunlun-Golmud River only occur the strata younger than the Middle Pleistocene.Therefore,a conception of theKunlun-Huanghe movementwas proposed for the time span of 1.1 to 0.6 Ma.In this paper we report the discovery of over 20m of Ca-cemented fluvial gravels in the valley of Kunlun River,name... |
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| Keywords: | ESR dating Early Pleistocene gravels uplift valley development Kunlun River Kunlun Mountains |
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