内蒙古韩家营玄武岩夹层中三趾马动物群化石  

An Upper Miocene“Hipparion fauna”locality sandwiched by basalt in Hanjiaying,Nei Mongol

作　　者：王倩 刘艳[1] 王李花[3] 傅明楷 张兆群[1,2,5] WANG Qian;LIU Yan;WANG Li-Hua;Mikael FORTELIUS;ZHANG Zhao-Qun(Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences Beijing 100044,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences Beijing 100049,China;Centre for Vertebrate Evolutionary Biology,Institute of Palaeontology,Yunnan University Kunming 650091,China;Department of Geosiences and Geography,University Helsinki Helsinki FIN-00014,Finland;CAS Center for Excellence in Life and Paleoenvironment Beijing 100044,China)

机构地区：[1]中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室,北京100044 [2]中国科学院大学地球与行星科学学院,北京100049 [3]云南大学古生物研究院脊椎动物演化研究院,昆明650091 [4]芬兰赫尔辛基大学地球科学与地理学系,赫尔辛基FIN-00014 [5]中国科学院生物演化与环境卓越创新中心,北京100044

出　　处：《古脊椎动物学报（中英文）》2021年第2期125-137,共13页Vertebrata Palasiatica

基　　金：国家自然科学基金(批准号:41402003);国家基础科学人才培养基金(批准号:J1210008);中国科学院战略性先导科技专项(B类)(编号:XDB26030301)资助。

摘　　要：内蒙古乌兰察布市集宁区韩家营村附近发现了一处夹在两层玄武岩之间的三趾马动物群化石地点。通过K-Ar同位素测年,确定了上、下两层玄武岩的年代分别为6.8和7.2Ma。与中国北方其他三趾马动物群相比,韩家营三趾马动物群与山西保德、内蒙古四子王旗以及甘肃临夏盆地的三趾马动物群非常相似。保德第43、44、49地点与韩家营的动物群组成类似,表明这几个地点的时代约为7.0 Ma而不是5.5 Ma。内蒙古四子王旗乌兰花地点与韩家营的化石类群也十分相像,证实了该动物群年龄约为7 Ma。对比甘肃临夏盆地的动物群,柳树组上部的杨家山三趾马动物群与韩家营的更接近。韩家营动物群的组成和牙齿结构表明其属于中国晚中新世的西部生物区系Gazella dorcadoides动物群。Here we report a Hipparion fauna locality discovered in between two basalt layers near Hanjiaying Village,Jining District,Wulanchabu City,Nei Mongol.K-Ar isotopic dating of the lower and upper level of the basalt constrains the age of the fauna from 7.2 to 6.8 Ma.Compared with classical Hipparion fauna from northern China,the Hanjiaying fauna is closer to those from Baode of Shanxi,Siziwang Banner of Nei Mongol and the Linxia Basin of Gansu.It is similar to the Loc.43,44 and 49 from Baode by faunal composition,confirming their age to be~7.0 Ma rather than 5.5 Ma.The high similarity with the fossils from Wulanhua,Siziwang Banner,Nei Mongol,verified the age of Wulanhua fauna at about 7 Ma.Compared with faunas from the Linxia Basin,Gansu,it is more similar to those from the upper part of the Liushu Formation,especially the Yangjiashan fauna.Based on the faunal composition and their tooth morphology,

关 键 词：内蒙古 集宁区 晚中新世 三趾马动物群 K-AR测年 

分 类 号：Q915.873[天文地球—古生物学与地层学]