中祁连木里盆地古近系ESR年龄及地质意义

戚帮申; 胡道功; 王进寿; 赵希涛; 张绪教; 张耀玲; 杨肖肖; 高雪咪

中祁连木里盆地古近系ESR年龄及地质意义

1.
中国地质大学地球科学与资源学院, 北京 100083
2.
中国地质科学院地质力学研究所, 北京 100081
3.
青海省地质调查院, 青海西宁 810007
4.
中国科学院地质与地球物理研究所, 北京 100029

基金项目:

项目基金：中国地质调查局“祁连山及邻区天然气水合物资源勘查（控矿因素综合研究及编图）”项目 GZHL20120301

详细信息

作者简介:
戚帮申(1988-), 男, 硕士研究生, 主要从事地貌与新构造运动研究。E-mail:qibangshen@126.com

中图分类号: P597⁺.3
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- 被引次数: 0
出版历程
- 收稿日期: 2013-07-23
- 刊出日期: 2013-12-01

ESR DATING OF THE PALAEOGENE IN MULI BASIN IN THE MIDDLE OF QILIAN MOUNTAINS AND ITS GEOLOGICAL SIGNIFICANCE

1.
School of Earth Science and Resources, China University of Geosciences, Beijing 100029, China
2.
Institute of Geomechanics, Chinese Academy of Geological Science, Beijing 100081, China
3.
Qinghai Institute of Geological Survey, Xining 810017, China
4.
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

摘要

摘要: 对中祁连木里盆地新生代红层进行ESR测年，获得了祁连山地区新生代红层沉积时代及构造变形年代学数据。研究表明，中祁连木里盆地内沉积了巨厚的新生代红层，较好地记录了祁连山隆升历史。盆地最老的新生代地层为始新世由湖相沉积组成的火烧沟组，ESR年龄为40.2~35.3 Ma，与上覆沉积时代为32.6~24.3 Ma的渐新世河湖相沉积组成的白杨河组呈角度不整合接触。构造变形特征与沉积环境的变化说明始新世末与渐新世初木里地区发生了构造变形和山脉的隆升，与祁连山地区新生代早期的隆升有很好的对应关系。
- 白杨河组 /
- 火烧沟组 /
- ESR年龄 /
- 中祁连
Abstract: The technique of ESR was applied to determine the Cenozoic red beds, Muli Basin, therefore, we can get the age of sedimentary and tectonic deformation. The results indicated there were huge thick Cenozoic Red Beds and tectonic deformation geochronological data, well recording the uplift of Qilian Mountains. Based on the ESR dating, the Tertiary sediments include the Eocene to Oligocene Huoshaogou Formation (40.2~35.3 Ma), which consists mainly of lacustrine facies and the Oligocene Baiyanghe Formation (32.6~24.3 Ma), which consists lacustrine and fluvial facies. From late Eocene to early Oligocene, an obvious angular unconformity exists between the upper and lower strata and it can be inferred that Qilian Mountains area has been a tectonic deformation and uplift, which has corresponding connection with the early Cenozoic uplift of Qilian Mountains.
- Baiyanghe Formation /
- Huoshaogou Formation /
- ESR dating /
- the middle of Qilian Mountains

HTML全文

图 1 木里盆地地质构造略图及剖面位置

1—全新世冲积物；2—中更新世冰水沉积；3—古近系；4—白垩系；5—侏罗系；6—三叠系；7—二叠系；8—奥陶系；9—青白口系；10—晚奥陶世灰色中细粒花岗闪长岩；11—晚奥陶世肉红色中细粒正长花岗岩；12—早奥陶世灰绿色辉长岩；13—断层；14—剖面位置

Figure 1. Geological map of the Muli Basin and location of profiles

下载: 全尺寸图片幻灯片

图 2 木里盆地火烧沟组（E_2—3h）与白杨河组（E₃b）特征

Figure 2. The characteristics of E_2—3h and E₃b in Muli Basin

下载: 全尺寸图片幻灯片

图 3 木里盆地火烧沟组（E_2—3h）、白杨河组（E₃b）实测剖面

Figure 3. Measured profiles of E_2—3h and E₃b in Muli Basin

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

表 1 陇莫日曲剖面样品ESR测年结果

Table 1. ESR dating result of the Longmori profile in Muli Basin

表 2 青藏高原东北部始新世—渐新世岩石地层单位及沉积时代

Table 2. Eocene-Oligocene lithostratigraphic units in the northeast of Qinghai-Tibet Plateau and their ages

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