Cretaceous-Neogene accretionary units: Shimanto Belt
Cretaceous-Neogene accretionary units: Shimanto Belt
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白垩纪-新近纪增生单元：四万十带
DOI：
10.1144/goj.4
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and K. Ujiie
中科院分区：
文献类型：
--
作者：
Kimura;G.;T. Hashimoto;A. Yamaguchi;Y. Kitamura;and K. Ujiie
Miyashiro（1961，1973）提出的成对变质带的概念将沿着会聚边缘的高热流和低热流的平行带的存在与地表以下在对比P-T条件下形成的成对变质区联系起来。Oxburgh & Turcotte（1971）对会聚板块边缘的定量模拟表明，低热带？冷岩石圈沿沿着洋沟流入地幔（图2c）。1）、带的热量高吗？如何解释热岩浆的上升和？火山弧中的火山喷发成对变质带的概念提供了一种新的动态方法来看待区域变质作用，将板块的物理运动与由此产生的热量运动联系起来。构造地质学和变质岩石学这两个领域的研究人员现在有一个共同的目标：在他们对区域变质带和板块尺度构造过程的观察之间建立联系。这一新的认识仍然为造山带的许多研究提供了框架和动力。三坝川带和良谷带既是成对变质作用的典型产地，也是基底地质学这一新领域的起点。在这一章中，我们总结了目前的知识状态，这些带，并考虑如何他们的地质发展？板块运动和中生代东亚俯冲带的发展。
The idea of paired metamorphic belts proposed by Miyashiro (1961, 1973) links the presence of parallel belts of high and low heat flow along convergent margins with paired regions of metamorphism below the surface that form under contrasting P–T conditions. Quantitative modelling of convergent plate margins by Oxburgh & Turcotte (1971) showed that the belt of low heat? ow can be accounted for by the inflow of cold lithosphere into the mantle along oceanic trenches (Fig. 2c. 1), and the belt of high heat? ow can be accounted for by the rise of hot magma and? uids in volcanic arcs. The idea of paired metamorphic belts provided a new dynamic way of looking at regional metamorphism, linking the physical movements of plates to the resulting movement of heat. Researchers in the two fields of structural geology and metamorphic petrology now had a common purpose: establishing a link between their observations of regional metamorphic belts and plate-scale tectonic processes. This new insight still provides the framework and motive for many studies of orogenic belts. The Sanbagawa and Ryoke belts are both the type locality of paired metamorphism and the starting point for this new field of endeavour in basement geology. In this chapter we summarize the present state of knowledge of these belts and consider how their geological development re? ects plate movements and the development of the Mesozoic East Asian subduction zone.