Zhang-Xuan thermal uplift and its genesis  

作　　者：SHAO Ji＇an NIU Shuyin ZHANG Lüqiao LI Hongyang 

机构地区：[1]School of Earth and Space Sciences, Peking University, Beijing 100871, China [2]Shijiazhuang University of Economics, Shijiazhuang 050031, China [3]Geological Bureau of Inner Mongolia, Huhhot 010020, China

出　　处：《Progress in Natural Science:Materials International》2005年第8期725-732,共8页自然科学进展·国际材料（英文版）

基　　金：SupportedbyNationalNaturalScienceFoundationofChina(GrantNos.40072073,40372103and40272088)andChineseAcademyofSciences(GrantNo.KZCX07)

摘　　要：Based on the researches of the Mesozoic thermal evolution history, the deformed structures, and fission track analysis of the Zhangjiakou-Xuanhua area, we obtained the following knowledge: the area experienced in 140 Ma an underplating which is marked by emplacement of mantle derived magma; during 130—110 Ma a series of eruptions and intrusions happened, and during 80—10 Ma a rising process occurred which is synchronous with the adjacent Taihang and Yanshan Mountains and was accompanied by a series of structures down slipping from the just formed Zhang-Xuan uplift toward its periphery. Combining the Zhang-Xuan thermal lift with the large detachment structure in Baoding depression of the North China Basin in the Late Mesozoic confirms that an even larger extensional tectonic background existed in North China during this period.Based on the researches of the Mesozoic thermal evolution history, the deformed structures, and fission track analysis of the Zhangjiakou-Xuanhua area, we obtained the following knowledge： the area experienced in 140 Ma an underplating which is marked by emplacement of mantle derived magma; during 130-110Ma a series of eruptions and intrusions happened, and during 80-10Ma a rising process occurred which is synchronous with the adjacent Taihang and Yanshan Mountains and was accompanied by a series of structures down slipping from the just formed Zhang-Xuan uplift toward its periphery. Combining the Zhang-Xuan thermal lift with the large detachment structure in Baoding depression of the North China Basin in the Late Mesozoic confirms that an even larger extensional tectonic background existed in North China during this period.

关 键 词：Zhang-Xuan area UNDERPLATING thermal uplift fission truck extensional structure 

分 类 号：P531[天文地球—古生物学与地层学]