日本在亚洲前沿的构造定位及其对中国东部区域构造的含义

日本列岛是晚古生代以来洋、陆沿活动陆缘汇聚及南来地体拼贴的产物，在日本海中新世张开以前曾是亚洲大陆的一部分，因此其历史对于完善东亚显生宙后期的构造演化记录是极为可贵的。本文在有关研究成果的基础上提出：(1)日本列岛主体是中亚造山带沿走向的延伸，记录了从朝鲜半岛向南中生代亚洲大陆的增生历史。中朝克拉通的东界应在它的西面经图们江带弧形转折后沿朝鲜半岛以东南下。(2)从锡霍特阿林到菲律宾，亚洲前沿以侏罗纪为主的消减-增生杂岩也可能在闽粤沿海的大片中生代火山岩下面发现；长乐-南澳变质带可能相当于巴拉望或西菲律宾地块并与日本的黑濑川带有关。(3)日本学者有关飞骅边缘带是秦岭-大别缝合带向东延续的论述，提示该带可能是中亚和秦岭两个造山带向东延续的复合，中朝和扬子陆块在它以西依次尖灭。

Tectonic positioning of the Islands of Japan in the Mesozoic Asian fron tier and its relation to the regional geology of eastern China

The Islands of Japan have evolved through convergence between continental and oceanic plates along active continental margins since the Late Paleozoic.Before the opening of the Sea of Japan as a back-arc basin in the Miocene,the islands were a part of the Asian continent.So its geological history is extremely precious for replenishing the late Phanerozoic tectonic evolutionary records of Eastern Asia.Based on recent research results obtained by Chinese,Japanese,Korean,French and Russian geologists,the au-thors proposed the following views :(1)The main part of the islands of Japan is the extension of the Central Asian orogenic belt along strike and represents the accretionary history of the Mesozoic Asian conti-nent from the Korea Peninsula southwards.(2)The geology of the Fujian-Guangdong coastal area indi-cates that the main Jurassic subduction-accretionary complex,distributed from Shikhote-Alin to Palawan,could also occur beneath the large cover of Mesozoic volcanic rocks and that the Changle-Nan'ao meta-morphic belt along the coast of Fujian Province is postulated to be a part of the Palawan block or West Philippine block and its history seems similar to the Kurosegawa belt.(3)The Hida metamorphic belt is considered to be an eastern extension of the Triassic suture zone between the Sino -Korean and Yangtze plates proposed by Japanese geologists,implying that the Hida Marginal Belt could be a composite oro-genic belt where the Central Asian orogen merged with the Qinling-Dabie orogen and that the Sino-Ko-rean and Yangtze cratons tapered off successively between them.