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Iou Island (Iou-to; Iwo-Jima; Iwojima; Iou-jima; Naka-Iou-jima), Volcano Islands (Kazan Rettou), Tokyo Prefecture, Japan

Latitude: 24°47'18"N
Longitude: 141°19'19"E
硫黄島

Andesitic volcanics. Classic feldspar locality which has produced many loose plagioclase crystals coated with thin crusts of glassy lava. Much unexploded ordnance left over from WWII - trespassing prohibited and dangerous. Politically belongs to Tokyo Prefecture although Iwo lies far out in the Pacific Ocean to the south of Honshu island (where the city of Tokyo itself is located).
(The geographic coordinates given here are for the sulphur mine.)

Mineral List

Mineral list contains entries from the region specified including sub-localities
Aegirine
Albite
var: Andesine

var: Oligoclase
Anorthite
Anorthoclase
'Apatite'
Augite
Biotite
Calcite
'Clay'
'Clinopyroxene Subgroup'
Forsterite
Hematite
'Hornblende'
Limonite
Magnetite
'Obsidian'
'Olivine'
Opal
'Pyroxene Group'
Sulphur
Zeolite Group


28 entries listed. 11 valid minerals.

Localities in this Region

Japan
  • Tokyo Prefecture
    • Volcano Islands (Kazan Rettou)

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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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