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山西晚新生代古地理环境变迁与新构造运动响应
  • ISSN号:1000-0844
  • 期刊名称:《地震工程学报》
  • 时间:0
  • 分类:P531[天文地球—古生物学与地层学;天文地球—地质学] P546[天文地球—构造地质学;天文地球—地质学]
  • 作者机构:[1]山西省地震局,山西太原030021, [2]太原理工大学,山西太原030024, [3]成都理工大学,四川成都610059
  • 相关基金:地震行业科研专项(200908001);地震行业科研专项(201208009-14)
中文摘要:

系统解读了山西晚新生代古地理古环境特征,结合近年来笔者的研究给出了各时代古地理分布图。上新世的构造运动和地理环境演化奠定了现今地理环境的基础,尤其是奠定了现今地貌、水系的轮廓。早更新世地理环境最突出的事件是各断陷盆地中的湖泊广泛发育,出现淹没整个盆地的大湖景观;黄土广泛发育,但主要堆积于吕梁山分水岭以西;黄河在早更新世已经发育,并形成5级阶地。中更新世古地理的主要事件是湖泊的衰退,黄土堆积范围几乎遍布全省,厚可达200rn左右,表明气候较早更新世进一步明显变干。晚更新世古地理的主要特征是湖泊消亡,其地理环境更加接近现代。最后,笔者预测未来山西断陷盆地将持续断陷,各盆地内水系不再外流,形成贯通的大湖景观,类似现今的贝加尔湖。

英文摘要:

The Late Cenozoic paleogeography of Shanxi was affected by geomorphology, rivers, sedimentary environment, animals, plants, climate, loess, and ancient human activities during the Pliocene and Pleistocene epochs,from about 5.5 million to 12 thousand years ago. The evolution of the paleogeography formed the basis of the modern geography and environment, particularly the modern landscape and water systems. Understanding the ancient environment is also of great importance for effective environmental protection and for predicting future climate. Using infor- mation from our recent field investigations conducted throughout Shanxi Province, this paper sys- tematically gives explanatory notes on the paleogeographical and paleoenvironmental characteris- tics for all epochs of the late Cenozoic in Shanxi Province. During tectonic movements in the early Pliocene, the Shanxi rift zone began to subside. In the Datong, Xinding, Taiyuan, and Linfen areas a rift basin began to form,with the corresponding emergence of small lakes. In the middle and late Pliocene,these basins formed large-scale rift lake because of the intense tectonic movement. The neighboring mountains were uplifted significantly. From then on,the basic geomorphological pattern was consistent with that of the current basin. In the late Pliocene,the rift basin subsided sig- nificantly,the climate became cooler, and large lakes began to appear in the rift basin. The early Pleistocene is characterized by wide-spread lakes in rift basins. In general, the climate at this time was a temperate forest and grassland monsoon climate alternating between wet and dry. It was moister and cooler than the Pliocene period, warm and humid in the earlier part, and cool and hu- mid later. Loess deposition began,but mainly in the west of the Luliang Mountain watershed;the Yellow River developed in the early Pleistocene, during which five terraces formed. In the middle Pleistocene the lakes in the first basins began to recede,and loess deposits up to 200 m thick were deposited throu

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期刊信息
  • 《地震工程学报》
  • 中国科技核心期刊
  • 主管单位:中国地震局
  • 主办单位:兰州地震研究所 清华大学 中国地震学会 中国土木工程学会
  • 主编:王兰民
  • 地址:甘肃省兰州市东岗西路450号
  • 邮编:730000
  • 邮箱:dzgcxb@gssb.gov.cn dzgcxb@yahoo.cn 2506121280@qq.com
  • 电话:0931-8275892
  • 国际标准刊号:ISSN:1000-0844
  • 国内统一刊号:ISSN:62-1208/P
  • 邮发代号:54-28
  • 获奖情况:
  • 中国地球物理学类核心期刊,中国地震局优秀科技期刊,中国科技论文统计源期刊
  • 国内外数据库收录:
  • 日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:975