步林在甘肃党河流域塔奔布鲁克地区的早期工作记录-经典脊椎动物化石地点与现代地层框架的解译  

EARLY EXPLORATIONS OF TABENBULUK REGION (WESTERN GANSU PROVINCE) BY BIRGER BOHLIN—RECONCILING CLASSIC VERTEBRATE FOSSIL LOCALITIES WITH MODERN STRATIGRAPHY

作　　者：王晓鸣[1,2] 王伴月[2] 邱占祥[2] 

机构地区：[1]美国洛杉矶自然历史博物馆,洛杉矶90007 [2]中国科学院古脊椎动物与古人类研究所,北京100044

出　　处：《古脊椎动物学报》2008年第1期1-19,共19页Vertebrata Palasiatica

基　　金：中国科学院知识创新工程重要方向项目(编号：KZCX2-YW-120);国家自然科学基金重点项目(编号：40730210);国家重点基础研究发展规划项目(编号：2006CB806400);中国科学院海外杰出青年学者基金(编号：2004-2-4);美国国家科学基金(编号：EAR-0446699)资助

摘　　要：1931-1932年博格·步林在甘肃省西部塔奔布鲁克地区(又名党河地区,位于肃北县城西南)首次发现丰富的新生代哺乳动物化石。步林在塔奔布鲁克盆地中部燕丹图沟中找到三个小哺乳动物化石异常丰富的层位。三个层位紧靠在一起,其中产出的哺乳动物群被命名为燕丹图动物群。步林明确指出燕丹图动物群为晚渐新世。该动物群以后成为晚渐新世塔奔布鲁克哺乳动物期的典型动物群并沿用至今。The classic Tabenbuluk localities first discovered by Birger Bohlin in 1931 have produced rich fossil mammals that become the basis of the Late Oligocene Tabenbulukian Land Mammal Age. Faunas from the Tabenbuluk areas are often confused, partly due to the tectonic complexities that resuited in the uplift of Danghe Nanshan and the large strike-slip Ahyn Tagh Fault. However, part of the confusion is derived from a lack of appreciation of Bohlin＇ s historic records. We attempt to integrate Bohlin＇ s archive records, his journals, and his published （ but often ignored） geologic descriptions. When the entire available records are brought together, it is clear that Bohlin was an exceptional paleontologist who has kept remarkably detailed locality records and was able to make clear distinctions about his Yandantu Fauna, which typify the Tabenbulukian Land Mammal Age. By placing Bohlin＇ s fossil localities in modern stratigraphic frameworks and integrating with fossil mammals collected recently, we can recognize at least five faunas： Early to Late Oligocene Dingdanggou Fauna, latest Oligocene Yandantu Fauna, Early Miocene Xishuigou Fauna, Middle Miocene Tiejianggou Formation unnamed fauna, and a Late Miocene or Pliocene unnamed fauna. Of these, three faunas are tied to paleomagnetic sections that yield age ranges of -31.5-26.5 Ma for the Dingdanggou Fauna, -20-17 Ma for the Xishuigou Fauna, and -15.5-12 Ma for the unnamed fauna of the Tiejianggou Formation. Although still not directly tied to a paleomagnetic section, the Yandantu Fauna is confined to a narrow range of strata （-40m） and probably spans less than 1 million years.

关 键 词：甘肃 青海 古近纪 新近纪 哺乳动物 生物地层 

分 类 号：Q915.87[天文地球—古生物学与地层学] P534.61[生物学—古生物学]