Distribution of the Permian Monodiexodina in Karakorum and Kunlun and its Geological Significance  

作　　者：YAO Jianxin WANG Naiwen XIAO Xuchang JI Zhansheng WU Guichun WU Zhenjie LI Boqin WANG Jun WANG Yong ZHAI Qingguo 

机构地区：[1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China [2]Chang＇an University, Xi＇an, Shaanxi 712000, China

出　　处：《Acta Geologica Sinica(English Edition)》2009年第2期229-237,共9页地质学报（英文版）

基　　金：support of the National Nature Science Foundation of China(no.:40572018);the China Geological Survey(no.:200313000054,1212010611702,1212010661312,1212010511702,and1212010561605).

摘　　要：The Permian fusulinoidean genus Monodiexodina is widely distributed in east Tethys. The genus might be an important indicator for the northern margin of Gondwana in northwestern China, but this is disputed. Monodiexodina-bearing areas can be restored as in either northern or southern middle latitudes with a symmetrical distribution between a high latitudinal, cool/cold water climatic realm and a paleotropical, warm water realm. Permian strata bearing Monodiexodina in Karakorum, Muztag Pear, and Buka Daban Pear of the east Kunlun Mountains can be correlated with each other. Faunal analyses and the stratigraphical position of Monodiexodina-bearing strata indicate that both Karakorum, east Kunlun, and the Pamirs were formed in a cool temperate sea area of the northern hemisphere in middle latitudes during the Permian, rather than at the Gondwana margin.The Permian fusulinoidean genus Monodiexodina is widely distributed in east Tethys. The genus might be an important indicator for the northern margin of Gondwana in northwestern China, but this is disputed. Monodiexodina-bearing areas can be restored as in either northern or southern middle latitudes with a symmetrical distribution between a high latitudinal, cool/cold water climatic realm and a paleotropical, warm water realm. Permian strata bearing Monodiexodina in Karakorum, Muztag Pear, and Buka Daban Pear of the east Kunlun Mountains can be correlated with each other. Faunal analyses and the stratigraphical position of Monodiexodina-bearing strata indicate that both Karakorum, east Kunlun, and the Pamirs were formed in a cool temperate sea area of the northern hemisphere in middle latitudes during the Permian, rather than at the Gondwana margin.

关 键 词：Monodiexodina middle latitude symmetric distribution cool temperate sea area Karakorum east Kunlun northern hemisphere 

分 类 号：P534.46[天文地球—古生物学与地层学] TP79[天文地球—地质学]