...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Cenozoic paleo-environmental evolution of the Pamir-Tien Shan convergence zone
【24h】

Cenozoic paleo-environmental evolution of the Pamir-Tien Shan convergence zone

机译：帕米尔-天山汇合带的新生代古环境演化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The retreat of the Tethys Sea and the uplift of the Tibetan Plateau play the critical roles in driving Asian climatic changes during the Cenozoic. In the Pamir-Tien Shan convergence zone, over 3000 m of Cenozoic successions, consisting of marine deposits in the lower, continental clay and fine sand in the middle, and molasse in the upper part, record the evolution of the Tethys Sea, the Asian aridification, and the deformation of the Pamir. In this work, the existing biostratigraphic subdivisions and new electronic spinning resonance dating results were used to assign ages to formations within the Ulugqat section. Sedimentary facies analysis and multi-proxy indices were used to reconstruct the paleo-environmental evolution. The results show: (1) the Pamir-Tien Shan convergence zone has undergone progressive environmental changes from shallow marine before ～34 Ma to arid land at ～23 Ma and finally to inter-mountain basin by ～5.3 Ma; (2) the overall increase in mean size of grains, decrease in redness, in magnetic susceptibility, and in proportion of the ultrafine component of the sediments studied revealed a long-term strengthening in potential energy to transporting medium, cooling, and enhanced continental aridity, respectively; (3) the easternmost edge of the Tethys Sea prevailed in the western Tarim Basin from late Cretaceous to early Cenozoic, and finally retreated from this region around the Eocene-Oligocene transition, which in turn strengthened the Asian aridification; (4) accumulation of molasse with an upper age of ～1 Ma suggests that the deformation front of the Pamir migrated to this area at or before that time.
机译：特提斯海的退缩和青藏高原的隆起在推动新生代亚洲气候变化方面起着关键作用。在帕米尔—天山汇合带，新生代陆相超过3000 m，由下部的海相沉积，中部的大陆粘土和细砂以及上部的糖蜜组成，记录了亚洲特提斯海的演化。干旱化，以及帕米尔（Pamir）的变形。在这项工作中，现有的生物地层划分和新的电子旋转共振测年结果被用来为Ulugqat剖面内的地层分配年龄。沉积相分析和多代理指标被用来重建古环境演化。结果表明：（1）帕米尔—天山辐合带经历了从〜34 Ma以前的浅海到〜23 Ma的干旱地带，最后到〜5.3 Ma的山间盆地的渐进性环境变化； （2）总体平均晶粒尺寸增加，发红，磁化率降低以及所沉积沉积物超细成分的比例总体上表明，向输送介质，冷却和增加的大陆干旱的势能长期增强。 ， 分别; （3）特提斯海的最东端在白垩纪晚期至新生代早期盛行于塔里木盆地西部，并最终在始新世-渐新世过渡带附近从该地区撤退，从而加强了亚洲的干旱化； （4）糖蜜的积累年龄在〜1 Ma以上，这表明帕米尔高原的变形锋在那个时候或之前迁移到了这个地区。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2014年第5期|84-100|共17页
  • 作者

    Xin Wang; Donghuai Sun; Fahu Chen; Fei Wang; Baofeng Li; Sergej V. Popov; Sheng Wu; Yuebao Zhang; Zaijun Li;

  • 作者单位

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Paleontological Institute RAS, Profsoyuznaya ul. 123, 117997 Moscow, Russia;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

    Key Laboratory of Western China's Environmental Systems (Ministry of Education), Lanzhou University, 222 South Tianshui Road, 730000 Lanzhou, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cenozoic; Pamir-Tien Shan convergence zone; Tethys Sea; Asian aridification;

    机译：新生代帕米尔－天山汇合带;特提斯海;亚洲干旱;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号