摘要
地质、地球物理和钻探资料证明 ,松辽盆地为前寒武古板块。然而 ,在中生代早侏罗纪 ,大兴安岭东缘和松辽构造区还是西太平洋敞开着的深海沟环境〔6〕,怎么会出现前寒武古板块呢 ?显然 ,只有大规模的板块漂移活动 ,才能把松辽前寒武板块移置到中生代深海沟区。所以 ,松辽板块是大型移置体 ,而大兴安岭则是松辽板块与蒙古板块 (兴蒙古生代褶皱系 )
Geological, geophysic and drilling data show that Songliao basin is a Precambrian paleoplate.Nevertheless, in Mesozoic Early Jurassic, the eastern margin of Da Hinggan Mountains and the Songliao tectonicarea remained in an open deep-sea trench environment in West Pacific Ocean, how could a Precambrian paleoplate occur? It is obvious that only through large-scale plate drift could Songliao Precambrian plate be transplanted to Mesozoic deep-sea trench. Therefore, Songliao plate seems to be a large-size allochthon, whereas Da Hinggan Mountains must have been produced as a result of compression and collision between Songliao plate and Mongolia plate.
出处
《物探与化探》
CAS
CSCD
1997年第2期91-98,共8页
Geophysical and Geochemical Exploration
关键词
松辽板块
动力学环境
板块漂移
大兴安岭
隆升
Songliao plate, dynamic environment, plate drift, Da Hinggan Mountains, gravity gradient zone.
