Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Ogasawara Islands, Tokyo, Japan

mindat Locality ID: 32099
mindat URL: http://www.mindat.org/loc-32099.html

Tectonic Settings:

Total number of sublocalities beneath "Ogasawara Islands, Tokyo, Japan": 20
Total number of bottom-level sublocalities: 15

Number of Child Localities: 4
Child Localities:
Chichijima Group
Hahajima Group
Minami-Tori-shima
Mukojima Group

Latitude: 27°6'0"N
Longitude: 142°11'0"E
Decimal Degree (lat, lon): 27.1,142.18333333333

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Amorphous	Apophyllite	Calcite	Clay	Corundum	Erionite	Feldspar	Gypsum	Harmotome	Heulandite
Mica	Mordenite	None	Olivine	Pyrite	Pyroxene	Quartz

Anorthite ()*	Augite ()*	Calcite ()*	Celadonite ()*	Clinoenstatite ()*
Enstatite ()*	Erionite-Ca ()*	Fluorapophyllite-(K) ()*	Forsterite ()*	Gypsum ()*
Hematite ()*	Heulandite-Ca ()*	Heulandite-Na ()*	Mordenite ()*	Opal ()*
Phillipsite-Ca ()*	Pyrite ()*	Quartz ()*

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al C Ca F Fe H K Mg Na O S Si

Elements from minerals reported directly at this locality: Ca H O S

Structural Groups for minerals in this locality:
Amorphous Apophyllite Calcite Clay Corundum Erionite Feldspar Gypsum Harmotome Heulandite
Mica Mordenite None Olivine Pyrite Pyroxene Quartz

18 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	1	76687	1036
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	2	76671,76687	2060
Calcite ()*	Calcite	Ca(CO₃)	5	76671,76672,76674,76675,76680	27770
Celadonite ()*	Mica Clay	KMgFe³⁺Si₄O₁₀(OH)₂	1	76671	309
Clinoenstatite ()*	Pyroxene	Mg₂Si₂O₆	3	76669,76671,76687	94
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	1	76670	944
Erionite-Ca ()*	Erionite	Ca₅[Si₂₆Al₁₀O₇₂]·30H₂O	1	76671	31
Fluorapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀F·8H₂O	1	76671	303
Forsterite ()*	Olivine	Mg₂(SiO₄)	2	76671,76687	1188
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	0		6890
Hematite ()*	Corundum	Fe₂O₃	1	76682	14640
Heulandite-Ca ()*	Heulandite	(Ca,Na,K)₅(Si₂₇Al₉)O₇₂·26H₂O	1	76671	246
Heulandite-Na ()*	Heulandite	(Na,Ca,K)₆(Si,Al)₃₆O₇₂·22H₂O	1	76671	18
Mordenite ()*	Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆·28H₂O	3	76671,76673,76681	405
Opal ()*	Amorphous	SiO₂·nH₂O	2	76673,76681	2994
Phillipsite-Ca ()*	Harmotome	Ca₃(Si₁₀Al₆)O₃₂·12H₂O	1	76671	75
Pyrite ()*	Pyrite	FeS₂	2	76671,76684	39462
Quartz ()*	Quartz	SiO₂	11	76669,76670,76671,76673,76674,76675,76676,76677,76678,76680,76681	61156

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL
X050038	Ogasawara Islands, Tokyo, Japan	https://rruff.info/X050038

All locality data graciously provided by mindat.org

All age data...