Petrologic and geochronologic studies of rare earth minerals in a pegmatite in late Cretaceous granitoid from the Mihara Mine area (Hiroshima Prefecture), Inner Zone of Southwest Japan (preliminary study)

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  • 西南日本内帯広島県三原鉱山周辺の後期白亜紀花崗岩体のペグマタイトに含まれる希元素鉱物の記載と年代測定の予察的研究

Description

To discuss the distribution of trace elements and REEs within island arc crust, rare earth minerals from a pegmatite deposit within the late Cretaceous granitoid in the Mihara Mine area were described by combining EPMA and LA-ICP-MS analytical data. Micro textures of rare earth minerals and chemical characteristic of zircon that were influenced by hydrothermal metasomatism in the latest stage of plutonic magma process suggest the transfer of trace elements and REEs from primary monazite to other minerals.

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