本文将参加年度优秀论文评选,如果您觉得这篇文章很好,请投下您宝贵的一票,谢谢! 支持(2)   不支持(1)

柴达木盆地鸭湖地区水上雅丹地貌成因研究
投稿时间:2018-04-21  修订日期:2018-09-30  点此下载全文
引用本文:毛晓长,刘祥,董颖,拜永山,徐亚东,宋博文.2018.柴达木盆地鸭湖地区水上雅丹地貌成因研究[J].地质论评,64(6):1505-1518,[DOI]:.
MAO Xiaochang,LIU Xiang,DONG Yin,BAI Yongsha,XU Yadong,SONG Bowen.2018.Research on the Genesis of Semi- submerged Yardang Landform in the Duck Lake Area of Qaidam Basin[J].Geological Review,64(6):1505-1518.
DOI:
摘要点击次数: 261
全文下载次数: 300
作者单位E-mail
毛晓长 1) 中国地质调查局北京100037 xmaoteng@163.com 
刘祥 2) 中国地质大学(武汉)地球科学学院武汉430074  
董颖 3) 中国地质环境监测院, 北京100081  
拜永山 4) 青海省地质调查院西宁810012  
徐亚东 2) 中国地质大学(武汉)地球科学学院武汉430074  
宋博文 5) 中国地质大学(武汉)地质调查研究院武汉430074  
基金项目:本文为中国地质调查局项目(编号: 121201004000150013, DD20160345, 121201014000150018)的成果。
中文摘要:本文通过对青海柴达木盆地鸭湖地区构成水上雅丹的地层序列和沉积相、地层形成时代、地层形成后演化为雅丹地貌的构造条件、气候条件和人为因素的研究,认为构成研究区水上雅丹的地层为中新世上油砂山组,所含介形虫组合指示其形成时代为中新世晚期;沉积相和孢粉组合分析揭示本区在中新世晚期为温暖干旱的气候下的古湖环境,接受湖相和湖泊三角洲前缘沉积;上新世在区域构造抬升和干旱化气候的双重作用下,古湖逐渐萎缩;更新世在极端干旱和强劲的季风环境中,被抬升到地表的上油沙山组上部地层在风蚀为主的外营力作用下形成雅丹;晚更新世末期—全新世由于末次间冰期的到来,气候转向温暖湿润,湖水再次入侵。近年人类活动改变了湖泊分布格局,导致湖泊淹没了部分陆地上的雅丹,呈现为奇特的水上雅丹地貌景观。
中文关键词:水上雅丹  成因  地貌演化  上油砂山组  柴达木盆地
 
Research on the Genesis of Semi- submerged Yardang Landform in the Duck Lake Area of Qaidam Basin
NameInstitution
MAO Xiaochang1)China Geological Survey, Beijing ,100037
LIU Xiang2)School of Earth Sciences, China University of Geosciences, Wuhan, 430074
DONG Yin3)China Institute of Geological Environment Monitoring, Beijing, 100081
BAI Yongsha4)Qinghai Geological Survey Institute, Xining, 810012
XU Yadong2)School of Earth Sciences, China University of Geosciences, Wuhan, 430074
SONG Bowen5)Institute of Geological Survey, China University of Geosciences, Wuhan, 430074
Abstract:Through the study of the stratigraphic sequence, sedimentary facies, formation age of the strata that make up Semi submerged Yardang landform and the tectonic conditions, climate and human factors of the evolution of Yardang landform after the formation of stratigraphic in the Duck Lake area of Qaidam Basin in Qinghai Province, the formation of Semi submerged Yardang landform in the study area is the Miocene Upper Youshashan Formation, and the ostracod assemblages indicate that the formation age is late Miocene. The analysis of sedimentary facies and sporo pollen assemblages reveal that this area was warm and arid climate in late Miocene and it was covered by the ancient lake and accepted lacustrine facies and lacustrine delta front facies sedimentary. In the Pliocene, the ancient lake shrank and disappeared under the dual role of regional tectonic uplift and arid climate. Pleistocene in extreme drought and strong monsoon environments, the upper strata of the Upper Youshashan Formation was lifted up to the surface, formed Yardang landform under the action of wind erosion dominated external forces. From late Pleistocene to early Holocene due to the arrival of the last interglacial, the climate turned warm and moist, and the lake invaded to form three lakes. In recent years, the distribution pattern of lakes has been changed under the action of human activities, which presents the landscape of today’s Duck Lake. Today, the lake area of Duck Lake drowns some Yardang and becomes a peculiar Semi submerged Yardang landform landscape.
keywords:Semi- submerged Yardang  genesis  geomorphic evolution  Upper Youshashan Formation  Qaidam Basin
查看全文  查看/发表评论  下载PDF阅读器
WeChat
s