Mineral Evolution Database

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

Mineral locality data provided by mindat.org

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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:
St Helier, Jersey

mindat Locality ID: 67848
mindat URL: http://www.mindat.org/loc-67848.html

Tectonic Settings:

Total number of sublocalities beneath "St Helier, Jersey": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Hermitage

Latitude: 49°10'22"N
Longitude: 2°7'31"W
Decimal Degree (lat, lon): 49.172777777778,-2.1252777777778

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	Calcite	Clay	Clinozoisite	Corundum	Epidote	Feldspar	Mica	None	Prehnite
Pyroxene	Quartz	Spinel	Titanite

Aegirine ()*	Ankerite ()*	Arfvedsonite ()*	Calcite ()*	Diopside ()*
Epidote ()*	Hematite ()*	Ilmenite ()*	Maghemite ()*	Magnesio-arfvedsonite ()*
Orthoclase ()*	Phlogopite ()*	Prehnite ()*	Quartz ()*	Siderite ()*
Titanite ()*

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 Fe H K Mg Na O Si Ti

Elements from minerals reported directly at this locality: Al C Ca Fe H K Mg Na O Si Ti

Structural Groups for minerals in this locality:
Amphibole Calcite Clay Clinozoisite Corundum Epidote Feldspar Mica None Prehnite
Pyroxene Quartz Spinel Titanite

16 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	0		1022
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	0		3092
Arfvedsonite ()*	Amphibole	NaNa₂(Fe²⁺₄Fe³⁺)Si₈O₂₂(OH)₂	0		295
Calcite ()*	Calcite	Ca(CO₃)	1	76995	27770
Diopside ()*	Pyroxene	CaMgSi₂O₆	0		4135
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1	76995	8173
Hematite ()*	Corundum	Fe₂O₃	0		14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	0		5433
Maghemite ()*	Spinel	(Fe³⁺_0.67 _0.33)Fe³⁺₂O₄	0		229
Magnesio-arfvedsonite ()*	Amphibole	NaNa₂(Mg₄Fe³⁺)Si₈O₂₂(OH)₂	0		79
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	0		2349
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	0		2273
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	1	76995	1898
Quartz ()*	Quartz	SiO₂	1	76995	61156
Siderite ()*	Calcite	Fe(CO₃)	0		6417
Titanite ()*	Titanite	CaTi(SiO₄)O	1	76995	4899

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...