Accretion and uplifting of deep accretionary complex

在这项研究项目中，我们成功地完成了增生杂岩最深层的沉积和抬升。结果表明：(1)日本四国中西部高P/T三百川变质岩原岩可划分为22种岩石类型。(2)根据原岩序列，(3)Banno等人(1978)在重建的大洋板块地层学的基础上证实了四国中部三八川变质带的巨型卧式褶皱。(4)三八川变质岩具有“洗牌构造”的特征，表明泥质片岩被注入到洋板地层起源的层序中。(5)三八川变质岩作为增生杂岩的最深部分，脱水释放的流体穿过推覆体边界，在区域上提供了加硼和同位素蚀变。

In this research project, we have succeeded in accretion and uplifiting of deepest part of accretionary complex. The results are as follows.(1) Protolith of the high-P/T Sanbagawa metamorphic rocks can be divided into 22 rock types in the central and western Shikoku, Japan.(2) On the basis of a sequence of protohlith, the oceanic plate stratigraphy can be distinguished in the Sanbagawa metamorphic rocks in the central and western Shikoku.(3) The Giant recumbent fold of the Sanbagawa metamorphic belt in the central Shikoku by Banno et al.(1978) can be confirmed based on the reconstructed oceanic plate stratigraphy.(4) The Sanbagawa metamorphic rocks are characterized by "Shuffled card structure" showing injection of pelitic schists into the sequences originated from the oceanic plate stratigraphy.(5) In the Sanbagawa metamorpphic rocks as a deepest part of accretionary complex, fluid released by dehydration pass through nappe boundaries and regionally gives addition of Boron and oxygen isotopic alterations.