日高変成帯のいわゆる美生(びばいろ)片麻状花崗岩体の構造

概要

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The structural complex of so-called Pipairo gneissose granite which is situated at the northern part of the Hidaka metamorphic belt, is subdivided into three structural units such as the falling-star structure at the center, three phacolith-like masses and arch structure of a phacolith with inclination to west at the eastern part (Figs. 1, 2 and 3). They are not all the gneissose granite but are composed of schistose biotite hornfels, banded gneiss, biotite or cordierite migmatite and granitic migmatite some of which might be of melted to be the gneissose granite. The structural analysis from the mesoscopic as well as microscopic points of view revealed some results as follows: the falling-star body moved upward to south probably at the syn-kinematic stage, while other phacolith-like bodies were emplaced and thrusted up toward east probably at the late-kinematic stage.
地学団体研究会の論文
1972-05-25