| 塔北阿瓦特剖面磁性地层的构建:天山的脉动式隆升 |
| |
| 引用本文： | 荆显辉,沈忠悦,汪新,余养里,潘小青.塔北阿瓦特剖面磁性地层的构建:天山的脉动式隆升[J].地球物理学报,2011,54(6):1575-1583. |
| |
| 作者姓名： | 荆显辉 沈忠悦 汪新 余养里 潘小青 |
| |
| 作者单位： | 浙江大学地球科学系,杭州 310027 |
| |
| 摘 要： | 晚新生代以来天山造山带的构造演化过程仍缺少准确的年龄限制.南天山山前新生界地层普遍缺乏古生物化石以及岩浆活动等定年依据,然而地层沉积连续,适合于磁性地层定年.对阿瓦特地区3700 m厚的晚新生代地层进行了详细的磁性地层研究,建立了该地区西域组底部至吉迪克组顶部的磁极性变化序列,共识别出26个负极性和26个正极性带,与C...
|
| 关 键 词： | 磁性地层 库车坳陷 新生代 脉动隆升 |
| 收稿时间： | 2010-07-30 |
Magnetostratigraphic construct of Awate section in the north Tarim Basin: The impulse uplift of Tianshan Range |
| |
| JING Xian-Hui,SHEN Zhong-Yue,WANG Xin,YU Yang-Li,PAN Xiao-Qing.Magnetostratigraphic construct of Awate section in the north Tarim Basin: The impulse uplift of Tianshan Range[J].Chinese Journal of Geophysics,2011,54(6):1575-1583. |
| |
| Authors: | JING Xian-Hui SHEN Zhong-Yue WANG Xin YU Yang-Li PAN Xiao-Qing |
| |
| Institution: | Department of Earth Sciences,Zhejiang University,Hangzhou 310027,China |
| |
| Abstract: | Magnetostratigraphic results of Awate Section from 1606 horizons in Neogene strata between the upper Jidike Formation and the base of the Xiyu Formation in the Kuche Depression of the Tarim Basin, are used to evaluate the tectonic evolution of Tianshan Range. Progressive thermal demagnetization successfully isolated a linear characteristic remanent magnetization of dual polarity between 450 and 680℃, from which a magnetic polarity sequence is constructed. Twenty-six reversed and twenty-six normal polarity chrons can be identified from the composite magnetostratigraphy, which correlate between ~1.7 and ~15.1 Ma with the geomagnetic polarity time scale of Cande and Kent. Sedimentation rates from magnetostratigraphic age versus height show a decrease from ~22 to ~7 cm/ka at ~11 Ma and around 6.5 Ma there was another abrupt increase from ~7 to ~68 cm/ka. These episodical changes can be connected with Late Cenozoic impulse uplift of Tianshan Range. |
| |
| Keywords: | Magnetostratigraphy Kuche depression Cenozoic Impulse uplift |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
