岩石鉱物鉱床学会誌
Online ISSN : 1883-0765
Print ISSN : 0021-4825
日高国幌滿川上流の斑〓岩質閃緑岩中の硅長質変成岩並びにこれに伴う細粒包有岩 特に変成岩・包有岩の準火成岩構造の形成及び斑糲岩質閃緑岩と珪長質変成岩との関係について(I)
浅井 宏
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1959 年 43 巻 1 号 p. 26-35

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At the up-stream of the Horoman river, Hidaka province, felsic metamorphic rocks which are mainly composed of biotite hornfels, biotite migmatite, tonalitic migmatite and coarse biotite diorite are enclosed in gabbro-diorite on a small scale.
The biotite hornfels is not homogeneous and has clots of plagioclase-biotite rock with sub-glomeroporphylitic texture of biotite. In biotite and tonalite migmatites, the sub-igneous textures are recognized, and in their inclusions such as plagioclase-biotite or plagioclase-hornblende rocks the sub-diabase texture are also observed.
The migmatites, coarse biotite diorite, and their inclusions are considered to be the products of the metamorphism which differentiated from biotite hornfelsic rocks in the early and middle stages of the mechanical movement.
The gabbro-diorite has the relict texture of the migmatite and it seems that the gabbro-diorite was intruded before the stage of the migmatization.
No contact effects are found between the felsic metamorphic rock and the gabbro-diorite.

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