泥河湾盆地洞沟剖面上新世/更新世小哺乳动物  

THE PLIO-PLEISTOCENE SMLL MAMMALS FROM DONGGOU SECTION OF NIHEWAN BASIN,HEBEI,CHINA

作　　者：郑绍华[1] 蔡保全[2] 李强[1] 

机构地区：[1]中国科学院古脊椎动物与古人类研究所,北京100044 [2]厦门大学历史系,厦门361005

出　　处：《古脊椎动物学报》2006年第4期320-331,共12页Vertebrata Palasiatica

基　　金：国家自然科学基金项目(编号:40472012)资助

摘　　要：洞沟剖面6个层位(第2、4、7、11、16和19层)的小哺乳动物化石揭示剖面第10与第11层间是晚上新世／早更新世界限。界限之上Ochotona youngi、Borsodia chinensis、Allophaiomys deucalion和Yangia trassaerti等首次出现；界限之下Yangia omegodon和Hypolagus schreuderi首次出现以及Paenelimnoecus、Nannocricetus mongolicus、Sinocricetus progressus、Mesosiphneus para- tingi、Micromys tedfordi和Dipus fraudator最后绝灭。根据小哺乳动物组成及其属种转换事件判断,2．58 Ma左右往后气候环境显著向干冷方向转变。Both the Pliocene Laowogou section and the Pleistocene Danangou section in the Nihewan Basin have recently been restudied by Zhang et al. in 2003 and Cai et al. in 2004. However, small mammals collected near the Plio-Pleistocene boundary in these two sections are rare. To make up this deficiency, the Donggou section, about 500 m northeast of the Qianjiashawa village, described by Yang et al. in 1996 （ Fig. 1 ） was selected in 2005 for looking for fossils. By the water-screening method, many small mammals were collected from the layers 2, 4, 7, 11, 16 and 19 respectively. The distributions of small mammalian species in this section are shown in Table 2. The species from the three lower layers can be supplemental from each other with the three layers of the Xiaoshuigou section, about 800 m south of the Donggou section, described by Duet al. in 1988 （ Table 1 ） stratigraphically and biologically.

关 键 词：泥河湾盆地洞沟剖面 上新世/更新世 小哺乳动物 环境演变 

分 类 号：Q915.873[天文地球—古生物学与地层学]