| 上新世——早更新世青藏高原北缘隆升的磁性地层学证据 |
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| 引用本文： | 郑洪波,陈惠忠,靳鹤龄,李孝泽,董光荣.上新世——早更新世青藏高原北缘隆升的磁性地层学证据[J].海洋地质与第四纪地质,2002,22(2):57-62. |
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| 作者姓名： | 郑洪波 陈惠忠 靳鹤龄 李孝泽 董光荣 |
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| 作者单位： | 1. 同济大学,海洋地质教育部重点实验室,上海,200092;中国科学院,地球环境研究所,西安,710054
2. 中国科学院,旱区寒区环境与工程研究所,兰州,710000 |
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| 基金项目： | 国家杰出青年基金 (4 0 0 2 5 10 7)，国家重点基础研究发展规划项目 (G2 0 0 0 0 785 0 5 )，中国科学院“百人计划”资助项目 |
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| 摘 要： | 对新疆叶城剖面西域砾岩及下伏第三纪地层的磁性地层学研究表明 ,西域砾岩的沉积时代为晚上新世至早更新世 ,磁性地层年龄为 3.5至 <1.8Ma。阿图什组沉积于早上新世 ,古地磁年龄为 4 .6～ 3.5 Ma。阿图什组以砂岩和粉砂岩为主夹薄层砾岩 ,为河流相及冲积扇前缘相。西域砾岩以厚层砾岩为主夹风成粉砂岩 ,为典型洪积—冲积扇堆积。西域砾岩的沉积反映了青藏高原北缘晚上新世至早更新世强烈的隆起和剥蚀
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| 关 键 词： | 上新世 早更新世 磁性地层学 西域砾岩 磁性地层 青藏高原隆起 塔里木盆地 |
| 文章编号： | 0256-1492(2002)02-0057-06 |
| 修稿时间： | 2001年9月10日 |
MAGNETOSTRATIGRAPHIC EVIDENCE FOR THE PLIOCENE-EARLY PLEISTOCENE UPLIFT OF THE NORTHERN TIBETAN PLATEAU |
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| ZHENG Hong bo ,CHEN Hui zhong ,JIN He ling ,LI Xiao ze ,DONG Guang rong.MAGNETOSTRATIGRAPHIC EVIDENCE FOR THE PLIOCENE-EARLY PLEISTOCENE UPLIFT OF THE NORTHERN TIBETAN PLATEAU[J].Marine Geology & Quaternary Geology,2002,22(2):57-62. |
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| Authors: | ZHENG Hong bo CHEN Hui zhong JIN He ling LI Xiao ze DONG Guang rong |
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| Institution: | ZHENG Hong bo 1,2,CHEN Hui zhong 3,JIN He ling 3,LI Xiao ze 3,DONG Guang rong 3 |
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| Abstract: | Magnetostratigraphic study of the Xiyu conglomerate and underlying Tertiary strata of the Yecheng section,Xinjiang has revealed that the Xiyu Formation was deposited during the late Pliocene and early Pleistocene,with magnetostratigraphic ages from 3 5 Ma to younger than 1 8 Ma.The underlying Artux Formation was deposited during the early Pliocene,with magnetostratigraphic ages from 4 6 Ma to 3 5 Ma.The Artux Formation is dominated by sandstone and siltstone ,with minor gritstone layers,indicating a fluvial and distal fan environment.The Xiyu Formation is characterized by coarse conglomerate,typical of debris flow deposits,indicating a proximal fan environment.The deposition of Xiyu Formation indicates abrupt uplift of the northern Tibetan Plateau during the late Pliocene early Pleistocene. |
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| Keywords: | Xiyu conglomerate magnetostratigraphy Tibetan Plateau uplift Tarim Basin |
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