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Suishoyama pegmatite (Suishouyama; Suisyoyama; Suishyoyama), Iizaka (Iisaka) Village, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan

Iimoriite-(Y)
Suishoyama pegmatite, Iizaka Village, Kawamata, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan
A pegmatite shaped like a vertical pipe of 60m diameter. Worked for its major components (perthitic feldspar and quartz) for the ceramic industry. Unusually rich in yttrium-bearing minerals.
The largest pegmatite body in an area rich in other pegmatites.
Mining started in 1916 and closed in the early 1980s.
According to Hori et al. (2006) Iizaka (Iisaka) Village is the old locality name; the pegmatite is near Kawamata town.


Mineral List

Allanite-(Ce)
Allanite-(Y)
Almandine
Annite
Beryl
Biotite
Britholite-(Y) (TL)
Caysichite-(Y)
Fayalite
Fergusonite-(Y)
Fluorite
var: Yttrofluorite

'Gadolinite'
'Garnet'
Grunerite
'Gummite
var: Yttrogummite'

Hingganite-(Y)
'Hornblende'
Iimoriite-(Y) (TL)
Iwashiroite-(Y) (TL)
'K Feldspar'
Magnetite
Microcline
'Perthite'
Protomangano-ferro-anthophyllite
Quartz
Synchysite-(Y)
Tengerite-(Y)
Thalénite-(Y)
Thorogummite
Torbernite
Uraninite
Xenotime-(Y)
Yttrialite-(Y)
Yttrotantalite-(Y)
Zeunerite
Zircon


36 entries listed. 27 valid minerals. 3 type localities (valid minerals).

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References

- Hasegawa (1957), Sci. Rept. Tohoku University, Third series: 5: 345-371.
Miyawaki, Ritsuro, Kuriyama, Junko, and Naki, Izumi, 1993, The redefinition of tengerite- (Y) , Y2(CO3)3.2-3H2O, and its crystal structure, American Mineralogist, 78: 425-432.
Hori, H., Kobayashi, T., Miyawaki, R., Matsubara, S., Yokoyama, K., Shimizu, M. (2006): Iwashiroite-(Y), YTaO4, a new mineral from Suishoyama, Kawamata Town, Fukushima Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 101, 170-177.
- Hoshino, M., Kimata, M., Shimizu, M., Nishida, N., and Fujiwara, T. (2006) Allanite-(Ce) in granitic rocks from Japan: Genetic implications of patterns of REE and Mn enrichment. Canadian Mineralogist: 44: 45-62.

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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