泥盆纪最早期牙形刺带化石在蒙古南戈壁幕使盖(Mushgai)地区“尕屋(Gavuu)”段的首次发现  

The First Discovery of the Earliest Devonian Conodont Zonal Fossil from “Gavuu Member”in Mushgai Area of South Gobi,Mongolia

作　　者：王成源[1] Ziegler W. Minjin Ch. Sersmaa G. Munchtsetseg J. Gereltsetseg L. Nadya I 

机构地区：[1]中国科学院南京地质古生物研究所 [2]ForschungsinstitutSenckenberg [3]SchoolofGeology,MongolianUniversityofScienceandTechnology [4]InstituteofPetroleumGeology,RussianAcademyofSciences

出　　处：《世界地质》2003年第1期15-20,共6页World Geology

基　　金：中国科学院南京地质古生物研究所古生物学地层学开放实验室项目(023104);国家重点基础研究发展规划项目(G2000077708)资助。

摘　　要：在蒙古南戈壁的Bayan KhoshuuRuins剖面原归入到志留系Mandalovoo组尕屋 (Gavuu)段的地层中发现了牙形刺Caudicrioduswoschimidtiwoschmidti,这是泥盆纪最早期牙形刺带化石在蒙古的首次发现。尕屋 (Gavuu)段的下部属志留系 ,但其上部 ,即采集牙形刺样品M 9～M 12的层位肯定属下泥盆统 (下洛霍考夫阶 ) ,而不是下志留统。Mandalovoo组应当改为Mandalovoo群 。Conodont Caudicriodus woschimidti woschmidti has been found from a big outcrop (hill) of the Bayan-Khoshuu Ruins Section which had been previously assigned to the Silurian Gavuu Member of the Mandalovoo Formation. This is first time to find the lowermost Devonian conodont zonal fossil in Mongolia. The lower part of the Gavuu Member is of Silurian. But the strata from where we collected 4 samples numbered from M-9 to M-12 definitely belong to Lower Devonian(lower Lochkovian)rather than Lower Silurian. The Mandalovoo Formation should be named Mandalovoo Group, its three members should be changed into three formations.

关 键 词：早泥盆世 牙形刺 Caudicriodus woschmidti woschimidti 幕使盖地区 Gavuu组 

分 类 号：Q915.29[天文地球—古生物学与地层学]