Miyake-jima (三宅島, "Miyake Island") is a volcanic island in the Izu archipelago in the Philippine Sea approximately 180 kilometers (ca. 112 mi) southeast of Tokyo, Japan. As with the other islands in the Izu Island group, Miyake-jima forms part of the Fuji-Hakone-Izu National Park.

Small island with active volcano. Augite-olivine basalt. Famous as the classic locality for anorthite crystals, thousands of which were thrown out loose by the July 1874 eruption and distributed in collections around the world; usually coated with a film of reddish or blackish glassy lava. Some crystals display metallic schiller caused by discontinuous included films of native copper and/or copper-zinc alloys. Visiting and collecting here is sometimes impeded by eruptions of SO2 and H2S gas.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ 'α-Brass'

ⓘ 'Tetrahedrite Subgroup'

9 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:

ⓘ 'α-Brass'

Formula: Cu₃Zn

References:

Petrov, Alfredo (n.d.) Personal Communication.

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

References:

Can Mineral February 1, 1996 vol. 34 no. 1 147-159

Sadanaga, Ryoichi, Bunno, Michiaki (1974) The Wakabayashi Mineral Collection. Bulletin 7. The University Museum, The University of Tokyo

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374.

ⓘ Atacamite

Formula: Cu₂(OH)₃Cl

References:

Minerals in Japan (Field Best Encyclopedia V. 15, 2003)

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374. (quoting from Hirabayashi, et al (1984) Change in chemical composition of volcanic gases and sublimates collected after the 1983 eruption of Miyakejima. Bull. Volcano. Soc. Japan, 29, 2nd series, Special issue, The 1983 eruption of Miyakejima, S308-S318).

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

References:

Petrov, Alfredo (n.d.) Personal Communication.

ⓘ 'Charcoal'

Formula: C

References:

Alfredo Petrov, field observations in ash layer from 1874 eruption.

ⓘ Copper

Formula: Cu

References:

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374.

ⓘ Cuprite

Formula: Cu₂O

References:

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374. (quoting from Hirabayashi, et al (1984)nChange in chemical composition of volcanic gases and sublimates collected after the 1983 eruption of Miyakejima. Bull. Volcano. Soc. Japan, 29, 2nd series, Special issue, The 1983 eruption of Miyakejima, S308-S318).

ⓘ Forsterite

Formula: Mg₂SiO₄

Description: Brown, transparent. Well-known to local residents, who mistakenly call it "peridot".

References:

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374.

ⓘ 'Glass'

References:

Petrov, Alfredo (n.d.) Personal Communication.

ⓘ Hematite

Formula: Fe₂O₃

Description: Rare, as microcrystal druses on the surface of volcanic bombs.

References:

Shinsuke Goto and Alfredo Petrov collections.

ⓘ Kremersite

Formula: (NH₄,K)₂[Fe³⁺Cl₅(H₂O)]

References:

S. Matsubara (2002) "The Mineral Species of Japan" (Koubutsu Joho)

ⓘ Tenorite

Formula: CuO

References:

Kokuritsu Kagaku Hakubutsukan specimen.

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374. (quoting from Hirabayashi, et al (1984)nChange in chemical composition of volcanic gases and sublimates collected after the 1983 eruption of Miyakejima. Bull. Volcano. Soc. Japan, 29, 2nd series, Special issue, The 1983 eruption of Miyakejima, S308-S318).

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S

References:

Murakami, H. et al (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. J. Min. Petr. Economic Geology, 86, 364-374. (quoting from Hirabayashi, et al (1984)nChange in chemical composition of volcanic gases and sublimates collected after the 1983 eruption of Miyakejima. Bull. Volcano. Soc. Japan, 29, 2nd series, Special issue, The 1983 eruption of Miyakejima, S308-S318).

Gallery:

Cuⓘ Copper

Copper

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

Copper

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

Copper

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

ⓘ 'Glass'

Glass

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

Glass

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

Glass

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Copper	1.AA.05	Cu
ⓘ	'α-Brass'	1.AB.10a	Cu₃Zn
Group 2 - Sulphides and Sulfosalts
ⓘ	'Tetrahedrite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S
Group 3 - Halides
ⓘ	Kremersite	3.CJ.10	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
ⓘ	Atacamite	3.DA.10a	Cu₂(OH)₃Cl
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Tenorite	4.AB.10	CuO
ⓘ	Hematite	4.CB.05	Fe₂O₃
Group 9 - Silicates
ⓘ	Forsterite	9.AC.05	Mg₂SiO₄
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
Unclassified
ⓘ	'Glass'	-
ⓘ	'Charcoal'	-	C

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Atacamite	Cu₂(OH)₃Cl
H	ⓘ Kremersite	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
C	Carbon
C	ⓘ Charcoal	C
N	Nitrogen
N	ⓘ Kremersite	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
O	Oxygen
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Atacamite	Cu₂(OH)₃Cl
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Cuprite	Cu₂O
O	ⓘ Forsterite	Mg₂SiO₄
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Kremersite	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
O	ⓘ Tenorite	CuO
Mg	Magnesium
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Forsterite	Mg₂SiO₄
Al	Aluminium
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	Silicon
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Forsterite	Mg₂SiO₄
S	Sulfur
S	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Cl	Chlorine
Cl	ⓘ Atacamite	Cu₂(OH)₃Cl
Cl	ⓘ Kremersite	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
K	Potassium
K	ⓘ Kremersite	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
Ca	Calcium
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	Iron
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Kremersite	(NH₄,K)₂[Fe³⁺Cl₅(H₂O)]
Cu	Copper
Cu	ⓘ Atacamite	Cu₂(OH)₃Cl
Cu	ⓘ Cuprite	Cu₂O
Cu	ⓘ Copper	Cu
Cu	ⓘ Tenorite	CuO
Cu	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Cu	ⓘ α-Brass	Cu₃Zn
Zn	Zinc
Zn	ⓘ α-Brass	Cu₃Zn
Sb	Antimony
Sb	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S

Fossils

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

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Miyake-jima
Wikidata ID:	Q1075076
GeoNames ID:	1856788

Mindat Articles

Anorthite and Native Brass by Alfredo Petrov

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

Murakami, H., Kimata, M., Shimoda, S. (1991) Native copper included by anorthite from the island of Miyakejima: implications for arc magmatism. Journal of Mineralogy, Petrology and Economic Geology: 86(8): 364-374. https://www.jstage.jst.go.jp/article/ganko1988/86/8/86_8_364/_article/-char/en

Arakawa, Y., Murakami, H., Kimata, M., Shimoda, S. (1992) Strontium isotope compositions of anorthite and olivine phenocrysts in basaltic lavas and scorias of Miyakejima volcano, Japan. Journal of Mineralogy, Petrology and Economic Geology: 87(6): 226-239. https://www.jstage.jst.go.jp/article/ganko1988/87/6/87_6_226/_article

Kimata, M., Nishida, N., Shimizu, M., Saito, S., Matsui, T., Arakawa, Y. (1995) Anorthite megacrysts from island arc basalts. Mineralogical Magazine: 59(394): 1-14. https://rruff.info/doclib/MinMag/Volume_59/59-394-1.pdf

www.mindat.org (2013) http://www.mindat.org/article.php/976/Anorthite+and+Native+Brass

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Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Fossils

Other Databases

Mindat Articles

References

Miyake Island, Miyake Subprefecture, Tokyo Metropolis, Japan i
Regional Level Types
Miyake Island Island
Miyake Subprefecture Subprefecture
Tokyo Metropolis Prefecture
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