【作者】 李之彤； 赵春荆；

【Author】 Li Zhitong Zhao Chunjing (Shenyang Institute of Geology and Mineral Resources,CAGS)

【机构】 沈阳地质矿产研究所；

【摘要】 我国东北之吉林—黑龙江省东部处于滨太平洋构造域。在三叠纪时,那丹哈达岭受库拉板块作用影响,开始时拉裂分离成为边缘海盆,发育有洋壳岩石,随后在晚三叠世发生俯冲作用和蛇绿岩侵位,那丹哈达岭则是一板块俯冲带。与此同时,在大陆边缘地带——太平岭、长白山及张广才岭一带发生活化,形成一系列断陷盆地；同时伴随有强烈岩浆喷溢-侵入活动,结果造成一条巨大的火山-花岗岩带。按构造性质它属于安第斯型活动大陆边缘。更多还原

【Abstract】 The eastern part of Jilin and Heilonjiang Provinces,Northeast China,is of the Circum-Pacific Tectonic Region.Study of the regional geology indica- tes that this region was tectonicaUy rather active,specially in the realm of magmatism,in its initial stage(Late Triassic)of development. At the beginning of the Mesozoic,the Nadanhadaling in the first was splited and separated from the ancient continental margin,resulting in a margin sea basin with the develoment of ocean crust;this was followed by the emplacement of ophiolite in the Late Triassic under the effect of farth- er subduction of the Kula Plate.Finaly,the Nadanadaling Range became a typical plate subduction zone. Simultaneously the continental marginal area in the eastern part of Jilin and Heilongjiang provinces was activated,giving rise to faulted basins and st- rong eruptiveintrusive activities.As a result,a great Late Triassic volcano- granitic belt was formed.This area appeared to be an active continental mar- gin of Andes type.更多还原