Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Tori-shima Island, Tokyo Metropolis, Japani
Regional Level Types
Tori-shima IslandIsland
Tokyo MetropolisPrefecture
JapanCountry

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Neighbouring regions:
Hachijō Subprefecture, Tokyo Metropolis, Japan
Type:
Island
Mindat Locality ID:
40773
Long-form identifier:
mindat:1:2:40773:8
GUID (UUID V4):
0
Other/historical names associated with this locality:
Tori Island; Izu-Torishima Volcano


An uninhabited, 2.5km-wide island with an active volcano approximately 600 km south of city of Tokyo, politically belonging to Tokyo prefecture.
The island (some 4.8 km2) is the above water portion of a large submarine volcano.
The island is also within the Fuji-Hakone-Izu National Park.

The Izu-Torishima volcano which dominates the island is considered an active volcano.
Explosions in 1901-1902; ash and lava eruptions in 1939.
Last eruptions of the Izu-Torishima volcano was: 2002; an ash cloud was produced in August 2002.



Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


3 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ 'Fayalite-Forsterite Series'
ⓘ Forsterite
Formula: Mg2SiO4
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ 'Hypersthene'
Formula: (Mg,Fe)SiO3
ⓘ 'Olivine Group'
Formula: M2SiO4

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2SiO4
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Unclassified
ⓘ'Hypersthene'-(Mg,Fe)SiO3
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Olivine Group'-M2SiO4

List of minerals for each chemical element

HHydrogen
Hⓘ GypsumCaSO4 · 2H2O
OOxygen
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ ForsteriteMg2SiO4
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ Hypersthene(Mg,Fe)SiO3
Oⓘ Fayalite-Forsterite Series
Oⓘ Olivine GroupM2SiO4
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ ForsteriteMg2SiO4
Mgⓘ Hypersthene(Mg,Fe)SiO3
Mgⓘ Fayalite-Forsterite Series
SiSilicon
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ ForsteriteMg2SiO4
Siⓘ Hypersthene(Mg,Fe)SiO3
Siⓘ Fayalite-Forsterite Series
Siⓘ Olivine GroupM2SiO4
SSulfur
Sⓘ GypsumCaSO4 · 2H2O
CaCalcium
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ GypsumCaSO4 · 2H2O
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ Hypersthene(Mg,Fe)SiO3
Feⓘ Fayalite-Forsterite Series

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Regions, Features and Areas that Intersect

Eurasian Plate
Japan
Philippine Sea PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Tamura, Y., Tani, K., Chang, Q., Shukuno, H., Kawabata, H., Ishizuka, O., Fiske, R. S. (2007) Wet and Dry Basalt Magma Evolution at Torishima Volcano, Izu–Bonin Arc, Japan: the Possible Role of Phengite in the Downgoing Slab. Journal of Petrology, 48 (10). 1999-2031 doi:10.1093/petrology/egm048
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