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:
Trédrez-Locquémeau, Côtes-d'Armor, Brittany, France

Oldest recorded age at locality: 0.004
Youngest recorded age at locality: 0.003

mindat Locality ID: 245173
mindat URL: http://www.mindat.org/loc-245173.html

Tectonic Settings:

Total number of sublocalities beneath "Trédrez-Locquémeau, Côtes-d'Armor, Brittany, France": 9
Total number of bottom-level sublocalities: 6

Number of Child Localities: 4
Child Localities:
Locquémeau
Salt Marsh
Séhar Point
Trédrez

Latitude: 48°43'4"N
Longitude: 3°34'35"W
Decimal Degree (lat, lon): 48.717777777778,-3.5763888888889

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.

Arsenopyrite	Chalcopyrite	Clinozoisite	Corundum	Covellite	Epidote	Hydrotalcite	Löllingite	Nickeline	None
Pentlandite	Pyrite	Quartz	Rocksalt	Sphalerite	Spinel

Arsenopyrite ()*	Chalcopyrite ()*	Covellite ()*	Epidote ()*	Galena ()*
Hematite ()*	Löllingite ()*	Magnetite ()*	Mössbauerite ()*	Nickeline ()*
Pentlandite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Sphalerite ()*
Trébeurdenite ()*

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 As C Ca Cu Fe H Ni O Pb S Si Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Arsenopyrite Chalcopyrite Clinozoisite Corundum Covellite Epidote Hydrotalcite Löllingite Nickeline None
Pentlandite Pyrite Quartz Rocksalt Sphalerite Spinel

16 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	0.004	0.003	1	52594	9052
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	0.004	0.003	2	52594,52599	27198
Covellite ()*	Covellite	CuS	0.004	0.003	1	52599	4165
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	0.004	0.003	1	52597	8173
Galena ()*	Rocksalt	PbS	0.004	0.003	3	52594,52595,52599	24243
Hematite ()*	Corundum	Fe₂O₃	0.004	0.003	1	52597	14640
Löllingite ()*	Löllingite	FeAs₂	0.004	0.003	1	52594	762
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	0.004	0.003	2	52597,52599	14899
Mössbauerite ()*	Hydrotalcite	Fe³⁺₆O₄(OH)₈(CO₃)·3H₂O	0.004	0.003	1	52596	8
Nickeline ()*	Nickeline	NiAs	0.004	0.003	1	52594	633
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	0.004	0.003	2	52600,52601	1512
Pyrite ()*	Pyrite	FeS₂	0.004	0.003	3	52597,52599,52601	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	0.004	0.003	3	52594,52600,52601	9056
Quartz ()*	Quartz	SiO₂	0.004	0.003	3	52594,52595,52597	61156
Sphalerite ()*	Sphalerite	ZnS	0.004	0.003	3	52594,52599,52600	21482
Trébeurdenite ()*	Hydrotalcite	Fe²⁺₂Fe³⁺₄O₂(OH)₁₀(CO₃)·3H₂O	0.004	0.003	1	52596	8

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_385	Trébeurdenite and mössbauerite are found within the clay "gleysol" layer in the beaches and bays of North France. The characteristic blue color and halophyte fossil roots indicate the layer that was once a salt marsh, likely when sea levels were lower.

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Michelle_385	0.004	0.003	0.003-0.004	stratigraphy	Age of maritime salt marshes					Yes		Mossbauerite, Trebeurdenite		282038	Mont Saint-Michel Bay, Ille-et-Vilaine, Brittany, France	Mont Saint-Michel Bay	Génin et al. (2012)	10.1007/s10751-011-0500-8	HI204_71	Age of maritime salt marshes

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...