Evolutionary History of Mammalian Fauna and Paleoenvironments -Late Cenozoic Eurasia and North America-

本研究的目的是解释欧亚大陆东部晚新生代哺乳动物动物群的古环境、生物地层学和人类演化。1993年，日中联合考察队在云南元谋盆地进行了地层、沉积学、年代学和古生物调查。野外工作是在1994年至1996年的旱季(主要是12月)进行的。古生物学家和地质学家对元谋盆地的古人类和古人类遗址进行了详细的调查，并收集了元门盆地晚新生代地层的古环境和年代学样品。在此基础上，古生物学家对欧洲、北美、亚洲和东非多个博物馆中的晚新生代欧亚大陆哺乳动物化石进行了研究，得出以下结论：1.该盆地元谋组人化石的时代是由磁粉分析结果、与中国北部哺乳动物动物群的对比以及基于孢粉分析的气候变化确定的。2.孢粉分析结果表明，元谋盆地晚新生代的古环境在晚上新世至早更新世发生了较凉爽干燥的气候变化。3.元谋盆地北部古人类化石的时代仅通过与其他欧亚哺乳动物动物群的对比来确定。我们在1995年和1996年纽约匹兹堡古脊椎动物学会年会和1996年在北京召开的第31届国际地质大会上发表了这一结果。我们计划研究西瓦利克(印度和尼泊尔)和东南亚(缅甸到越南)晚新生代哺乳动物动物群的环境变化、演化和对比。

The purpose of this research is to interpret the paleoenvironments and biostratigraphy of Late Cenozoic mammalian fauna and human evolution in the Eastern Eurasia.In 1993, the Japanese and Chinese joint expedition conducted stratigraphical, sedimentological, geochronological and paleontological survey in the Yuanmou Basin, Yunnan Province, Southwest China. The field work was done during the dry season (mainly December) from 1994 to 1996. Paleontologists and geologists surveyed hominid and hominoid sites of Yuanmou Basin in detail, and collected paleoenvironmental and geochronological samples from the late Cenozoic strata of Yuanmoun Basin. Furthermore, Paleontologists researched the late Cenozoic Eurasian mammalian fossils in the many museums of Europe, North America, Asia and East Africa.The following conclusions are reached :1.The age of Hominid fossils from the Yuanmou Formation in this basin was determined by he result of magnetostaratigraphy, correlation with mammalian faunas of North China and climatic change based on pollen analysis. It's age is younger than the age of hominids of the previous researches.2.The result of pollen analysis shows that the late Cenozoic paleoenvironment of the Yuanmou Basin was changed to cooler and dryer climate during the late Pliocene to early Pleistocene.3.The age of Hominoid fossil from the Northern part of Yuanmou Basin wad determined by correlation of other Eurasian mammalian faunas only. It's age is older than the age of the Gantang Formation and Yuanmou Formation in the southern part of this basin.We presented this results at the 1995 and 1996 annual meeting of the Society of Vertebrate Paleontology (Pittsburgh, New York), and 31st International Geological Congress in Beijing 1996.We plan to research the Late Genozoic environmental change, evolution and correlation of the mammalian fauna in the Siwaliks (India and Nepal) and Southeast Asia (Burma to Vietnam).