古地理复原中的有限变形分析原理与方法  

APPLICATIONS OF PRINCIPLES AND METHODS OF LIMITED DEFORMATIONAL ANALYSIS TO PALAEOGEOGRAPHIC RECONSTRUCTION

作　　者：章泽军[1] 

机构地区：[1]中国地质大学

出　　处：《沉积与特提斯地质》1991年第1期35-41,共7页Sedimentary Geology and Tethyan Geology

基　　金：国家自然科学基金部分成果

摘　　要：变形弥满地壳,运动充满整个地史过程。这种“变”、“动”之结果,必然导致古沉积盆地初始面貌的改变。然而,在迄今为止的岩相古地理研究中,均以现位现态在水平面内的投影视为原态,仍不考虑变形的影响,显然有失真实性。尤其在诸如几度非共轴叠加的褶皱区内,不仅其形态、位置被歪曲,就是按现有方法得出的古生态分布演化规律、岩相特征、水流指向等也未必反应了初始的客观事实。因此,古沉积盆地的复原不仅是正确分析地质演化历史之必要,同时也是使沉积矿产的预测逼近地史事实所必需,其意义是不言而喻的。It is possible to restore the distorted palaeogeographic outline and to reveal the entire processes including the depression and filling of an ancient sedimentary basin and palaeoecologic evolution by means of the adjustment of the location of the measured sections and the observed sites of sedimentary facies and palaeoecology according to the principles and methods proposed by the author in this paper. The palaeogeographic reconstruction is believed to have no bearings on the mechanism for tectonic deformation. However, the potential genesis of the tectonic deformation may be identified with the aid of the tentative methods to inverse tectonically deformed sequences.

关 键 词：沉积盆地 变形分析 岩相特征 地质演化历史 非共轴 生态分布 地层厚度 构造成因 沉积中心 线应变 

分 类 号：P642[天文地球—工程地质学]