Similarity analysis of rift structure and sedimentary in basins of southwestern Henan province, Upper characteristics Cretaceous
Abstract：In Upper Cretaceous, southwestern Henan province, from north to south, successively exist Songpin basin, Xiaguan basin, Xixia basin, Taohe basin and Liguanqiao basin, all of those arrange north-west with YanHang type. With the analysis of characteristics of a basin-controlling fault, we found that active Upper Cretaceous faults are conspicuous selfsimilar with fractal value 1. 228 3 and Correlation coefficient 0. 999, and the primary cause of that is the attitude alteration of main active zones 1 and 2 of Qinling Orogen belt in south- western Henan province, and that the right order pinnate fracture of upper cretaceous turn up with fractalfer- ture. Upper Cretaceous basins controlled by fractures are provided with selfsimilarity in shape and in deposit characteristic. In shape, either single basin or a group of basins are narrower in west than in east; in deposit characteristic, either single basin or a group of basins are provided with depocenters closer to and parallel the south controlling fault, from west to east, the sediment granularity of those gradually are thinner, the sedimen- tary facies of those gradually change from alluvial to a meandering river or a littoral and shallow lake. The conclusion is important to the analysis of the sedimentary and tectonic background of Upper Cretaceous basin and geotectonic nature of temporal Qinling orogenic belt.
Keywords：Upper Cretaceousbasinselfsimilarityin southwestern Henan province
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 674-678,701 )