2022 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 17 - Sep 19, 2022新潟大学 五十嵐キャンパス
2022 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 17 - Sep 19, 2022新潟大学 五十嵐キャンパス
[R7-02]Plausible candidates of the IOA-IOCG type magnetite ore deposits in the Kanto Mountains.
*Atsushi MIYASHITA1, Hiroyasu MURAKAMI2(1. Seikei Univ., 2. Waseda Univ.)
Keywords:
Magnetite,IOA-IOCG type,Skarn type
In the Kanto Mountains, some Neogene magnetite ore deposits have features such as (1) formed near the tectonic line; (2) accompanied by hydrothermal brecciation of host rocks; (3) with actinolite or chlorite and carbonate alteration; (4) with REE-rich minerals; (5) magnetites including chlorapatite inclusions; (6) high formation temperature above 500℃. These characteristics indicate that these magnetite ore deposits are the IOA-IOCG type candidates in Japan. These ore deposits are thought to have formed a metallogenic province with the Miocene to Pliocene granodiorite.