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:
Ascension Island, Saint Helena

mindat Locality ID: 57
mindat URL: http://www.mindat.org/loc-57.html

Tectonic Settings:

Total number of sublocalities beneath "Ascension Island, Saint Helena": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
5 Mile Post
Green Mountain
Middleton Peak

Latitude: 7°56'59"S
Longitude: 14°20'55"W
Decimal Degree (lat, lon): -7.9497222222222,-14.348611111111

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.

Amphibole	Cerite	Corundum	Eudialyte	None	Olivine	Pyroxene	Quartz	Sapphirine	Zircon

Aegirine ()*	Aenigmatite ()*	Arfvedsonite ()*	Dalyite ()*	Eudialyte ()*
Fayalite ()*	Hematite ()*	Monetite ()*	Newberyite ()*	Quartz ()*
Vlasovite ()*	Whitlockite ()*	Zircon ()*

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: Ca Cl Fe H K Mg Na O P Si Ti Zr

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

Structural Groups for minerals in this locality:
Amphibole Cerite Corundum Eudialyte None Olivine Pyroxene Quartz Sapphirine Zircon

13 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	3	104516,104517,104518	1022
Aenigmatite ()*	Sapphirine	Na₄[Fe²⁺₁₀Ti₂]O₄[Si₁₂O₃₆]	2	104516,104518	133
Arfvedsonite ()*	Amphibole	NaNa₂(Fe²⁺₄Fe³⁺)Si₈O₂₂(OH)₂	2	104516,104518	295
Dalyite ()*	None	K₂ZrSi₆O₁₅	3	104516,104517,104518	15
Eudialyte ()*	Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂	1	104516	182
Fayalite ()*	Olivine	Fe²⁺₂(SiO₄)	1	104516	371
Hematite ()*	Corundum	Fe₂O₃	0		14640
Monetite ()*	None	Ca(PO₃OH)	0		21
Newberyite ()*	None	Mg(PO₃OH)·3H₂O	0		24
Quartz ()*	Quartz	SiO₂	3	104516,104517,104518	61156
Vlasovite ()*	None	Na₂ZrSi₄O₁₁	1	104517	9
Whitlockite ()*	Cerite	Ca₉Mg(PO₃OH)(PO₄)₆	0		104
Zircon ()*	Zircon	Zr(SiO₄)	1	104516	5251

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...