P542
国家自然科学基金项目(编号40672086)资助的成果
地处青藏高原腹地的羌塘盆地构造以EW向褶皱和逆(冲)断层及NW向、NE向平移断层为主,偶见NW向、NE向褶皱和近SN向正断层。盆地自印支期以来长期处于SN向强烈挤压,其岩石应变特征显示SN向缩短,EW向伸展,并具继承性、递进性应变,及由盆地周边造山带向盆地腹部岩石应变强度递减的趋势。盆地自印支运动以来SN向地壳缩短具递减性,地壳缩短率分别为上三叠统为38%、侏罗系为24%-26.3%,第三系为17.47%-19.2%。
The tectonics of Qiangtang basin lying in central Qinghai-Tibetan plateau is main of east-west folds,overthrust faults and nouth-west,northe-east transcurrent faults,and occasionally nouth-west,north-east folds and near south-north normal faults can be found.For the basin has been great compressed by south-north stress since Indosinian movement,the feature of its rock's strain displays south-north compression and east-west extension,including inheriting and increasing strain,moreover,the strain of rock trends to decrease by degrees from orogen around the basin to central basin.The south-north crust in Qiangtang basin has been shortening successively since Indosinian movement,and respectively its shortening ratios are 38% at Trias,24%~26.3% at Jurassic,17.47%~19.2% at Tertiary.
黄继钧 李亚林.2007.羌塘盆地岩石有限应变及地壳缩短分析[J].地质学报,81(5):599-605.
HUANG Jijun, LI Yalin.2007. Analysis of the Finite Strain of Rocks and Shortening of the Crust in the Qiangtang Basin[J]. Acta Geologica Sinica,81(5):599-605.
