张盆压岭型地洼盆地基底沉降的数值分析与幕式构造-沉积作用  

QUANTITATIVE SUBSIDENCE ANALYSIS OF THE TENSIONAL BASIN AND COMPRESSIVE MOUNTAIN TYPE DIWA BASIN WITH IMPLICATIONS FOR CURTAIN LIKE TECTONICS AND SEDIMENTATION

作　　者：杨明慧[1] 魏永佩[1] 

机构地区：[1]西北大学地质学系

出　　处：《大地构造与成矿学》1999年第2期108-114,共7页Geotectonica et Metallogenia

摘　　要：主要进行柴达木北缘德令哈张盆压岭型地洼盆地侏罗纪——第四纪基底沉降的定量数值分析，并校正局部沉积物的加载引起的负荷沉降。借助基底抬升诱导的侵蚀效应建立了相应的沉降模式。分析表明，德令哈地洼盆地的演化历史可以分为四个阶段：２０４（？）～１３０Ｍａ（ＳⅠ）、１３０～９５Ｍａ（ＳⅡ）、６７～３５Ｍａ（ＳⅢ）和３５Ｍａ（ＳⅣ）至今，其沉降史记录了多期次幕式构造运动和幕式沉积作用。This paper presents a quantitative study of Jurassic Quaternary basement subsidence in the Delingha basin, a diwa basin of tensile basin and compressive mountain type, and corrected for local sediment loading. Subsidence patterns have been investigated for the effects of erosion induced uplift by means of analytical estimation. The history of the Delingha diwa basin has been subdivided in four stages: 204(?)～130 Ma(S Ⅰ), 130～95 Ma(S Ⅱ), 67～35 Ma(S Ⅲ) and 35～0 Ma(S Ⅳ), recording multiphase curtain like (compression and extension) tectonics and sedimentation.

关 键 词：张盆压岭 地洼盆地 沉降分析 沉积体系 盆地 

分 类 号：P542.3[天文地球—构造地质学] P512.2[天文地球—地质学]