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正如笔者1976年在《朝鲜、日本列岛地质构遗论考》一文中所阐明的那样,西北太平洋构造带在地质上相当于以阿尔卑斯——喜马拉雅山脉为代表的前沿造山带,它广泛分布在欧亚陆块的东部地区,其西部以位于西伯利亚的呈北东向延伸的长达2000公里的贝加尔裂谷系为界。它由下列在成因上有密切关系的各构造带联合而成。1.陆块地带:以北东——南西、北西——南东,东——西等方向的张性断层及伴随张性断层的地堑和掀斜断块为特征(图1)。2.前沿造山带:以主要向太平洋方向突出的岛弧系列为代表,以不同时代的岩层组成的褶皱复杂并为剪切断层分割的复合带状构连为特征(图2、3)。3.在岛弧内侧为具海槽的边缘海,在成因上可能是由裂谷和构造盆地形成的。4.沿岛弧的外侧发育着深海沟。上述构造的基本类型是经过侏罗纪、晚白垩——早第三纪、中第三纪、晚第三纪——晚更新世的地壳构造运动逐步发展而成的。虽然由于资料不足,尚有许多问题没有得到解决,但据地质和地球物理调查,对岛弧和边缘海盆地的成因已提出了各种见解和假说。就西太平洋构造带而论,通过地表观察到的地质现象表明:(1)上述的岛弧特征构造,可以用挤压力反复作用使其形成褶皱上升并向太平洋方向上冲的概念来说明;(2)岛弧向大洋方向漂离大陆。这些运动可能使洋壳向下弯曲而形成深海沟。本文所提供的图1—9,在一定程度上反映了笔者关于全球构造中的构造带问题的新见解。
As the author in 1976, “North Korea, Japan Islands geological structure of the test,” a paper that the Northwest Pacific tectonic belt equivalent to the Alps - Himalayas as the leading frontier orogenic belt, which is widely distributed in Eurasia The eastern part of the block is bounded by the 2,000-kilometer Baikal rift north-east extension of Siberia. It consists of the following structurally closely related genetic zones. 1. Land block: It is characterized by tension faults along the north east-southwest, north west-south east, east-west direction and grabens and overturned faults with tension faults (Figure 1). 2. Frontal orogen: A series of island arcs that are mainly prominent in the Pacific Ocean are represented by complex ribbon-shaped formations with complex folds of different age strata and segmented by shear faults (Figures 2 and 3). 3. The marginal sea with troughs inside the island arc may be genetically formed by rifts and tectonic basins. 4. Deep trenches develop along the outer edge of the island arc. The basic type of the above structure is the gradual development of the crustal tectonic movement through the Jurassic, Late Cretaceous - Early Tertiary, Middle Tertiary, Late Tertiary - Late Pleistocene. Although there are still many problems that have not been solved due to insufficient information, according to geological and geophysical surveys, various opinions and hypotheses have been put forward on the causes of island arcs and marginal seas. As far as the western Pacific tectonic belt is concerned, the geological phenomena observed through the surface show that: (1) The above-mentioned island arc structure can be explained by the concept that the compressive force repeatedly causes it to rise and wrinkle toward the Pacific Ocean; (2) island arc drift away from the ocean toward the ocean. These movements may bend the oceanic crust downward to form deep trenches. Figures 1-9 provided in this article reflect, to a certain extent, the author’s new insights into the tectonic zone in the global structure.