西藏申扎地区早泥盆世珊瑚类生物地理分析  

Biogeographic Attribution of Early Devonian Coral in Xainza Area,Tibet

作　　者：张予杰[1] 程立人[2] 

机构地区：[1]成都地质矿产研究所,成都610082 [2]吉林大学地球科学学院,长春130061

出　　处：《地质学报》2008年第6期750-759,共10页Acta Geologica Sinica

基　　金：国土资源大调查项目“青藏高原基础地质综合研究(编号1212010610101)”;“1∶25万区域地质调查(申扎县幅)(编号20001300009141)”资助成果

摘　　要：对西藏申扎地区早泥盆世珊瑚类的研究表明,申扎地区早泥盆世珊瑚群不论是从分异度、丰度还是分布范围上,都获得了极大的发展。通过分析西藏申扎地区早泥盆世珊瑚动物群组合,利用大冢系数的定量计算得出以下结论:申扎地区与我国云南丽江地区、西秦岭地区有着十分密切的联系,早泥盆世这3个地区为老世界大区(Old world realm)中的一个生物地理分区,并且进一步提出申扎地区与澳大利亚东部的关系密切。从混生的动物群角度上,印证了有关申扎地区是处于澳大利亚东部地区与我国华南之间过渡地区的观点。The Early Devonian coral in Xainza area is profoundly developed in differentiation and abundance aspects. By analyzing the fauna association, especially by calculating the coral- Otcuka coefficient quantificationally, we conclude that they are closely affinity with those in Lijiang of Yunnan and West Qinling paleobiogeographically, and the three areas may be viewed as one paleobiogeographic province referring to the Old World Realm in Early Devonian. Furthermore, the Early Devonian coral fauna in Xainza was also closely correlative to that of East Austrialia indicating that Xainza was situated in transition area between East Australia and South China during Early Devonian because of their mixed fauna.

关 键 词：西藏 申扎 早泥盆世 珊瑚类 生物地理区系 

分 类 号：P534.44[天文地球—古生物学与地层学]