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:
Longdowns, Stithians, Cornwall, England, UK

Oldest recorded age at locality: 294
Youngest recorded age at locality: 276

mindat Locality ID: 1058
mindat URL: http://www.mindat.org/loc-1058.html

Tectonic Settings:

Total number of sublocalities beneath "Longdowns, Stithians, Cornwall, England, UK": 4
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Hawes Quarry
Polkanuggo Quarry
Rosemanowas Quarry
Trolvis Quarry

Latitude: 50°9'59"N
Longitude: 5°9'58"W
Decimal Degree (lat, lon): 50.166388888889,-5.1661111111111

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.

Apatite	Clay	Feldspar	Fluorite	Mica	Monazite	None	Not in a structural group	Pyrite	Quartz
Sphalerite	Tourmaline

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 B Be Ca Ce F Fe H K Na O P S Si Zn

Elements from minerals reported directly at this locality: Al H K Na O Si

Structural Groups for minerals in this locality:
Apatite Clay Feldspar Fluorite Mica Monazite None Not in a structural group Pyrite Quartz
Sphalerite Tourmaline

10 IMA Minerals at location:

Albite ()*	Bertrandite ()*	Fluorapatite ()*	Fluorite ()*	Monazite-(Ce) ()*
Muscovite ()*	Pyrite ()*	Quartz ()*	Schorl ()*	Sphalerite ()*

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
Albite ()*	Feldspar	Na(AlSi₃O₈)	294	276	0		8803
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂	294	276	1	119055	606
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	294	276	1	119055	2740
Fluorite ()*	Fluorite	CaF₂	294	276	1	119055	9617
Monazite-(Ce) ()*	Monazite	Ce(PO₄)	294	276	1	119055	945
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	294	276	0		17380
Pyrite ()*	Pyrite	FeS₂	294	276	1	119055	39462
Quartz ()*	Quartz	SiO₂	294	276	1	119055	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	294	276	1	119055	2705
Sphalerite ()*	Sphalerite	ZnS	294	276	1	119055	21482

2 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
	Lucy_022a	294	276	285 ± 9	Rb-Sr data	Age granite intruded			C 1, C 1 KFeldpsar, C 1 Plag., C 1 Bio., C 1 Musc.						260361	Rosemanowas Quarry, Longdowns, Stithians, Cornwall, England, UK	Rosemanawas Quarry	Darbyshire et al. (1985)	10.1144/gsjgs.142.6.1159	JGSL142_1159
	Lucy_022b	292	288	290 ± 2	Rb-Sr data	C 1 mineral isochron appears to give a better estimate of the age of the Carnmenellis granite than the whole rock regression line.			C 1, C 1 KFeldpsar, C 1 Plag., C 1 Bio., C 1 Musc.						260361	Rosemanowas Quarry, Longdowns, Stithians, Cornwall, England, UK	Rosemanawas Quarry	Darbyshire et al. (1985)	10.1144/gsjgs.142.6.1159	JGSL142_1159	Circuation of hydrothermal fluids thre does not appear to have caused widespread resetting.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...