Irtysh shear zone is a stretched, but relatively narrow nearfault tectonic zone, which ischaracterized by the following features: a) general sturcture anisotropy (310-320o) with pre-dominance of symmetrical relationsh...Irtysh shear zone is a stretched, but relatively narrow nearfault tectonic zone, which ischaracterized by the following features: a) general sturcture anisotropy (310-320o) with pre-dominance of symmetrical relationships of planar and linear types; b) predominant develop-ment of bended blastomyolnite, blastocataclasite and metamelange fomations; c)regional,but non-uniform foliation of ricks and general manifestation of structures of the shearingflow; d) separation of numerous lenses of mingmatite-like and pegmatoid formations, smallintrusions of leucocratic granites, granite-porphyres and granite-aplites and dike-like bodiesof gabbro-dyabaes and ultrabasic rlcks, rarely.展开更多
Complicated system(collage)of block structures and orogenic belts had been formed in the S-E of Asia by collision prosesses in Mesozoic and Cenozoic periods. This collage began to form in early Mesozoic as a result of...Complicated system(collage)of block structures and orogenic belts had been formed in the S-E of Asia by collision prosesses in Mesozoic and Cenozoic periods. This collage began to form in early Mesozoic as a result of destruction of the continental Proterozoic-Paleozoic crust and movements of large terreines.Indosinian and Yangtze blocks(small plates)are the most characteristic block-terranes of the region; Myanmar and Songpan block systems are less representative. Variouse types of collision belts are situated between these blocks and on the periphery of the plates. They consist of concordant folded systems and shear zones. Some of these systems and shear展开更多
文摘Irtysh shear zone is a stretched, but relatively narrow nearfault tectonic zone, which ischaracterized by the following features: a) general sturcture anisotropy (310-320o) with pre-dominance of symmetrical relationships of planar and linear types; b) predominant develop-ment of bended blastomyolnite, blastocataclasite and metamelange fomations; c)regional,but non-uniform foliation of ricks and general manifestation of structures of the shearingflow; d) separation of numerous lenses of mingmatite-like and pegmatoid formations, smallintrusions of leucocratic granites, granite-porphyres and granite-aplites and dike-like bodiesof gabbro-dyabaes and ultrabasic rlcks, rarely.
文摘Complicated system(collage)of block structures and orogenic belts had been formed in the S-E of Asia by collision prosesses in Mesozoic and Cenozoic periods. This collage began to form in early Mesozoic as a result of destruction of the continental Proterozoic-Paleozoic crust and movements of large terreines.Indosinian and Yangtze blocks(small plates)are the most characteristic block-terranes of the region; Myanmar and Songpan block systems are less representative. Variouse types of collision belts are situated between these blocks and on the periphery of the plates. They consist of concordant folded systems and shear zones. Some of these systems and shear
