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:
Hachijo Island (Hachijyojima; Hachijojima), Izu Archipelago, Tokyo, Japan

mindat Locality ID: 218060
mindat URL: http://www.mindat.org/loc-218060.html

Tectonic Settings:

Total number of sublocalities beneath "Hachijo Island (Hachijyojima; Hachijojima), Izu Archipelago, Tokyo, Japan": 3
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Higashiyama (Mihara-yama; Haku'unzan Volcano)
Nishiyama Volcano (Hachijo-Fuji)

Latitude: 33°7'59"N
Longitude: 139°46'9"E
Decimal Degree (lat, lon): 33.133055555556,139.76916666667

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	Copper	Feldspar	None	Olivine	Pyroxene	Spinel

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 Ca Cu Fe H Mg O Si Zn

Elements from minerals reported directly at this locality: Ca Fe H Mg O Si Zn

Structural Groups for minerals in this locality:
Amorphous Copper Feldspar None Olivine Pyroxene Spinel

7 IMA Minerals at location:

Anorthite ()*	Augite ()*	Copper ()*	Forsterite ()*	Magnetite ()*
Opal ()*	Zinc ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	1	76647	1036
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	0		2060
Copper ()*	Copper	Cu	1	76647	3846
Forsterite ()*	Olivine	Mg₂(SiO₄)	1	76647	1188
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	0		14899
Opal ()*	Amorphous	SiO₂·nH₂O	0		2994
Zinc ()*	None	Zn	0		52

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...