试论华北地块中生代以来的盆—山运动  

THE BASIN-RANGE MOVEMENTS OF THE NORTH CHINA BLOCK SINCE THE MESOZOIC

作　　者：白文吉[1] 杨经绥[1] 胡旭峰[1] 

机构地区：[1]中国地质科学院地质研究所

出　　处：《中国区域地质》1991年第4期356-365,共10页Regional Geology of China

基　　金：地矿部华北基性岩;超基性岩项目;铂矿找矿方向项目

摘　　要：华北地块内自中生代以来,不存在蛇绿岩套。因此,该区不可能用板块观点解释其地壳演化问题。作者根据华北地块内盆地与山脉的构造格局及其应力场分析,认为该地块内盆地地壳的扩张拉伸体制与周边山脉的收缩挤压体制,二者相互作用与转化才是地壳运动的主要控制因素。本文还从山脉隆升速度、地震分带、岩浆活动性质、大地热流差异、岩石的变质和变形作用、上地幔的波动等方面,探讨了华北地块在中—新生代以来地壳演变的特点及其成因联系。There are no Mesozoic ophiolites in the North China block; therefore it is impossible to explain problems about its crust and tectonic evolution from the view-point of plate tectonics. According to the tectonic framework of the basins and ranges in the North China block and through an analysis of the stress field, the authors consider that the crustal expansion (extension) of the basins and the contraction (compression) of the mountains on their peripheries within the North China block were conjugate (syngenetic). Their interaction and mutual transformation are the main controlling factors for the crustal movements. For example, the Helan, Liupan and Zhuozi mountains in the western part of the block adjoin the Yinchuan graben; the Taihang and Luliang mountains in its eastern part are adjacent to the Jinzhong graben basin; the Qinling and Daba mountains on its southern margin is contiguous to the Weihe River graben. From the uplift rate of the mountains, earthquake zonation, magmatism, difference in geothermal flows, metamorphism and deformation of the rocks and fluctuation of the upper mantle, this paper discusses the features of crustal evolution of the North China block since the Mesozoic and their genetic relations.

关 键 词：地块 华北 中生代 盆一山运动 

分 类 号：P544.1[天文地球—构造地质学]