Regional metamorphic belts of the Japanese Islands
Regional metamorphic belts of the Japanese Islands
复制标题
日本列岛的区域变质带
DOI：
10.1111/j.1440-1738.1997.tb00041.x
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发表时间：
1997
期刊：
影响因子：
1.5
通讯作者：
T. Nakajima
中科院分区：
文献类型：
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作者：
T. Nakajima
本文结合日本列岛的构造演化，对日本区域变质带进行了概述。日本诸岛在中生代聚集之前，位于欧亚大陆或其组成陆块的活动边缘。日本群岛主要由变质和未变质的增生杂岩、花岗岩类及其由科迪勒拉型造山带形成的喷发等价物组成。变质带基本上被认为是增生杂岩的深部部分。尽管大洋板块持续俯冲到大陆之下，但这些造山岩的形成具有相当的阶段性，这一点可从增生杂岩的不连续基质年龄和花岗岩类同位素年龄的显著集中得到证明。白垩纪大规模花岗质岩浆活动和区域变质作用的系统性沿着-弧年龄偏移表明，洋脊俯冲等构造控制作用触发了幕式造山作用。基于成对变质带的构造模式，结合非稳定构造控制，可以很好地解释弧-沟体系中的岩浆作用和变质作用为大陆边缘过程。然而，成对变质带的并置过程仍是一个问题。两种可能的情况下，即横向位移和弧后逆冲推覆进行了讨论。
Abstract An overview of the regional metamorphic belts of Japan is given in the context of the tectonic evolution of the Japanese Islands. The Japanese Islands were situated on an active margin of the Eurasian continent or its constituent landmass before their assembly during the Phanerozoic. The Japanese Islands are composed mainly of metamorphosed and unmetamorphosed accretionary complexes, granitoids and their effusive equivalents that were formed by the Cordilleran‐type orogeny. The metamorphic belts are regarded essentially as a deep‐seated portion of an accretionary complex. In spite of continuous subduction of oceanic plates beneath the continents, these orogenic rocks were formed quite episodically, as evidenced by discontinuous matrix ages of the accretionary complexes and a striking concentration of isotopic ages of the granitoids. A systematic along‐arc age shift of Cretaceous large‐scaled granitic magmatism and regional metamorphism suggests a tectonic control such as ridge subduction, which triggered the episodic orogeny. A tectonic model based on the paired metamorphic belts, combined with the non‐steady tectonic control, works well to explain this magmatism and metamorphism in a single arc‐trench system as a continental margin process. However, the juxtapositional process of the paired metamorphic belts is still a problem. Two possible cases, namely transcurrent displacement and back‐arc overthrusting are discussed.
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
Shimura;T.;Kemp;A. I. S.;Nagakubo;E.;Suzuki;Y
通讯作者：
Y