吐鲁番盆地古近纪和新近纪的气候变化  

PALEOGENE AND NEOGENE PALEOCLIMATIC CHANGES IN THE TURPAN BASIN,NORTHWEST CHINA

作　　者：张西娟[1] 程捷[2] 王海芝[3] 于文洋[4] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质大学地球科学与资源学院,北京100083 [3]北京地质研究所,北京100011 [4]中国科学院遥感应用研究所,北京100101

出　　处：《地质力学学报》2004年第4期319-326,共8页Journal of Geomechanics

摘　　要：新疆吐鲁番盆地的连木沁剖面古近系与新近系的沉积厚度约1770m,是研究吐鲁番盆地这一时段古气候的良好载体。通过对连木沁剖面沉积物中常量元素地球化学分析,表明吐鲁番盆地在晚古新世阶段和晚始新世阶段,气候炎热湿润,但后者波动比较频繁。在渐新世,气候温暖干旱。中新世的气候变化明显可分为两个阶段,早期气候炎热潮湿,而晚期阶段温暖干旱。到上新世,气候显著干旱化。The Paleogene and Neogene at the Lamjin section in the Turpan basin,Xinjiang,have a sedimentary thickness of ～1779 m.This section is a good carrier for the study of the paleoclimate in this period in the basin.Major element geochemical analysis of the sediments in the section indicates the following: in the late Paleocene,the climate was warm and wet;in the late Eocene,it was also warm,but dry and wet alternately;in the Oligocene,it was warm and dry;in the Miocene,the climate was divided into two phases,being warm and wet in the early phase and cold and dry in the late phase;in the Pliocene,it was obviously dry.

关 键 词：气候变化 古近纪 新近纪 干旱化 剖面 古气候 吐鲁番盆地 晚古新世 上新世 渐新世 

分 类 号：P534[天文地球—古生物学与地层学] Q915[天文地球—地质学]