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羌塘地区特提斯域构造层可大致分为两个:(1)侏罗系构造层;(2)二叠—三叠系构造层.前者以典型的阿尔卑斯式褶皱构造为主,构成了区内宏观的近东西向构造,它们形成于燕山运动(L_(3末)—K_(1早)),并经历了喜山期南北向叠加褶皱改造,使其东西向的枢纽出现波状起伏和局部陡倾,地层走向和局部构造线呈近南北向;后者以线状紧闭褶皱和逆冲断层为特征,它们形成于印支期(T_(3末)),并在燕山期进一步加强.上述研究对于初步确定羌塘地区构造格架,指导区内基础地质研究和油气普查勘探具一定的理论和实践意义.
The Tethys structural zone in the Qiangtang area can be broadly divided into two types: (1) Jurassic structural strata, (2) Permian-Triassic strata, with the former being dominated by a typical Alpine fold structure They are formed in the Yanshanian movement (L_ (3) -K_ (1)) and underwent the north-south fold fold transformation in the Himalayan period, resulting in wavy undulations in the east-west pivot The local steeply dipping, stratigraphic trend and local tectonic line are nearly north-south direction. The latter are characterized by linear tight folds and thrust faults. They formed during the Indosinian (T 3) period and were further strengthened during the Yanshan period The above study is of theoretical and practical significance for the preliminary determination of the tectonic framework in the Qiangtang area, the basic geological research in the guiding area and the exploration of oil and gas census.