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:
Geevor Mine, Pendeen, St Just, Cornwall, England, UK

Oldest recorded age at locality: 399
Youngest recorded age at locality: 45

mindat Locality ID: 1296
mindat URL: http://www.mindat.org/loc-1296.html

Tectonic Settings:

Total number of sublocalities beneath "Geevor Mine, Pendeen, St Just, Cornwall, England, UK": 6
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Coronation Lode
Hanging Wall Vein
North Levant Mine (East Levant Mine)
Wheal Carne (Wheal Maitland; Wheal London)
Wheal Game
Wheal Stennack

Latitude: 50°8'45"N
Longitude: 5°40'9"W
Decimal Degree (lat, lon): 50.145833333333,-5.6691666666667

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.

Allanite	Allophane	Amorphous	Apatite	Aragonite	Arsenic	Atacamite	Autunite	Brochantite	Calcite
Chalcanthite	Chalcopyrite	Chlorite	Clay	Compreignacite	Connellite	Copper	Corundum	Covellite	Devilline
Diaspore	Epidote	Feldspar	Fluorite	Gypsum	Johannite	Kaolinite	Malachite	Marcasite	Melanterite
None	Not in a structural group	Pyrite	Quartz	Rutile	Smectite-vermiculite	Sphalerite	Tetrahedrite	Zippeite	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: Al As Bi C Ca Ce Cl Cu F Fe H In K Mg Mn Na O P S Si Sn U Zn

Elements from minerals reported directly at this locality: Al As Bi C Ca Ce Cl Cu F Fe H In K Mg Mn Na O P S Si U Zn

Structural Groups for minerals in this locality:
Allanite Allophane Amorphous Apatite Aragonite Arsenic Atacamite Autunite Brochantite Calcite
Chalcanthite Chalcopyrite Chlorite Clay Compreignacite Connellite Copper Corundum Covellite Devilline
Diaspore Epidote Feldspar Fluorite Gypsum Johannite Kaolinite Malachite Marcasite Melanterite
None Not in a structural group Pyrite Quartz Rutile Smectite-vermiculite Sphalerite Tetrahedrite Zippeite Zircon

56 IMA Minerals at location:

Albite ()*	Allanite-(Ce) ()*	Andersonite ()*	Aragonite ()*	Arsenic ()*
Atacamite ()*	Autunite ()*	Becquerelite ()*	Bismuth ()*	Bornite ()*
Brochantite ()*	Calcite ()*	Cassiterite ()*	Chalcanthite ()*	Chalcocite ()*
Chalcopyrite ()*	Chamosite ()*	Coffinite ()*	Compreignacite ()*	Connellite ()*
Copper ()*	Covellite ()*	Cuprite ()*	Cuprosklodowskite ()*	Devilline ()*
Djurleite ()*	Dolomite ()*	Fluorapatite ()*	Fluorite ()*	Goethite ()*
Gypsum ()*	Hematite ()*	Johannite ()*	Kaolinite ()*	Langite ()*
Laumontite ()*	Malachite ()*	Marcasite ()*	Melanterite ()*	Metazeunerite ()*
Montmorillonite ()*	Natrozippeite ()*	Neotocite ()*	Opal ()*	Paratacamite ()*
Pyrite ()*	Quartz ()*	Rhodochrosite ()*	Roquesite ()*	Schröckingerite ()*
Siderite ()*	Sphalerite ()*	Tennantite-(Fe) ()*	Uraninite ()*	Uranopilite ()*
Wittichenite ()*

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)	399	45	0		8803
Allanite-(Ce) ()*	Allanite Epidote	CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)	399	45	0		706
Andersonite ()*	Not in a structural group	Na₂Ca(UO₂)(CO₃)₃·5-6H₂O	399	45	0		47
Aragonite ()*	Aragonite	Ca(CO₃)	399	45	0		3250
Arsenic ()*	Arsenic	As	399	45	0		379
Atacamite ()*	Atacamite	Cu₂Cl(OH)₃	270	100	1	118850	544
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	399	45	0		1272
Becquerelite ()*	None	Ca(UO₂)₆O₄(OH)₆·8H₂O	399	45	0		92
Bismuth ()*	Arsenic	Bi	399	45	0		1966
Bornite ()*	None	Cu₅FeS₄	399	45	0		5516
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	399	45	0		1633
Calcite ()*	Calcite	Ca(CO₃)	270	100	1	118849	27770
Cassiterite ()*	Rutile	SnO₂	270	100	3	118851,118852,118854	5171
Chalcanthite ()*	Chalcanthite	Cu(SO₄)·5H₂O	399	45	0		925
Chalcocite ()*	None	Cu₂S	399	45	0		5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	270	100	1	118850	27198
Chamosite ()*	Chlorite Clay	(Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈	399	45	0		577
Coffinite ()*	Zircon	U(SiO₄)·nH₂O	270	100	1	118849	566
Compreignacite ()*	Compreignacite	K₂(UO₂)₆O₄(OH)₆·7H₂O	399	45	0		27
Connellite ()*	Connellite	Cu₃₆(SO₄)(OH)₆₂Cl₈·6H₂O	399	45	0		295
Copper ()*	Copper	Cu	399	45	0		3846
Covellite ()*	Covellite	CuS	399	45	0		4165
Cuprite ()*	Not in a structural group	Cu₂O	399	45	0		2970
Cuprosklodowskite ()*	None	Cu(UO₂)₂(SiO₃OH)₂·6H₂O	399	45	0		58
Devilline ()*	Devilline	CaCu₄(SO₄)₂(OH)₆·3H₂O	399	45	0		366
Djurleite ()*	None	Cu₃₁S₁₆	399	45	0		300
Dolomite ()*	None	CaMg(CO₃)₂	399	45	0		9895
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	399	45	0		2740
Fluorite ()*	Fluorite	CaF₂	399	45	0		9617
Goethite ()*	Diaspore	FeO(OH)	399	45	0		7437
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	270	100	1	118850	6890
Hematite ()*	Corundum	Fe₂O₃	270	100	3	118849,118851,118853	14640
Johannite ()*	Johannite	Cu(UO₂)₂(SO₄)₂(OH)₂·8H₂O	399	45	0		69
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	399	45	0		5591
Langite ()*	None	Cu₄(SO₄)(OH)₆·2H₂O	399	45	0		593
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	399	45	0		1271
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	399	45	0		12537
Marcasite ()*	Marcasite	FeS₂	399	45	0		5674
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	399	45	0		915
Metazeunerite ()*	None	Cu(UO₂)₂(AsO₄)₂·8H₂O	399	45	0		182
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O	399	45	0		1508
Natrozippeite ()*	Zippeite	Na₅(UO₂)₈(SO₄)₄O₅(OH)₃·12H₂O	270	100	1	118850	41
Neotocite ()*	Allophane	(Mn,Fe)SiO₃·H₂O (?)	399	45	0		186
Opal ()*	Amorphous	SiO₂·nH₂O	270	100	1	118852	2994
Paratacamite ()*	Atacamite	Cu₃(Cu,Zn)Cl₂(OH)₆	399	45	0		158
Pyrite ()*	Pyrite	FeS₂	399	45	0		39462
Quartz ()*	Quartz	SiO₂	270	100	5	118849,118850,118852,118853,118854	61156
Rhodochrosite ()*	Calcite	Mn(CO₃)	399	45	0		1711
Roquesite ()*	Chalcopyrite	CuInS₂	399	45	0		46
Schröckingerite ()*	None	NaCa₃(UO₂)(SO₄)(CO₃)₃F·10H₂O	399	45	0		128
Siderite ()*	Calcite	Fe(CO₃)	399	45	0		6417
Sphalerite ()*	Sphalerite	ZnS	399	45	0		21482
Tennantite-(Fe) ()*	Tetrahedrite	Cu₆(Cu₄Fe₂)As₄S₁₃	399	45	0		1803
Uraninite ()*	Fluorite	UO₂	270	100	1	118849	2718
Uranopilite ()*	None	(UO₂)₆(SO₄)O₂(OH)₆·14H₂O	399	45	0		94
Wittichenite ()*	None	Cu₃BiS₃	399	45	0		297

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Lucy_017	Age of granite

16 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Age from other Locality	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Lucy_081	270	100	270-100	40Ar - 39Ar	Lodes post-dating elvan intrusion and primary mineralization.			Yes		1265	St Just, Cornwall, England, UK	St Just	Hawkes et al. (1978		US4_51	Possibility of hydrothermal degassing of lode material around 210 Ma and 215 Ma which overprints a primary formation age of roughly 270 Ma. New mineral growth may have occurred close to 165 Ma with further hydrothermal activity at about 100 Ma. Adularia from veins in the Lizard Complex also provides indication
Lucy_017	270	266	268 ± 2	87Sr/86Sr ratio, Rb-Sr.	Age granite intruded		E 47623			1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Tin Mine	Darbyshire et al. (1985)	10.1144/gsjgs.142.6.1159	JGSL142_1159
Lucy_055	285	255	270 ± 15	Rb-Sr	Main stage polymetallic mineralization, preferred age determined in study	whole rock	G 1, G 3, G 5, G 6, G 7, G 8			1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darbyshire et al. (1985)	10.1144/gsjgs.142.6.1159	JGSL142_1159
Lucy_069	274	266	270 ± 4	K-Ar		k-feldspar				1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor	LeBoutillier et al. (2003)		GSWE10_403
Lucy_207	288	288	288		Locality unknown. Previous age stated.	uraninite			Uraninite	1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Miller et al (1964)	10.1002/gj.3350040109	GJ4_105	Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs)
Lucy_232	228	218	223 ± 5	206 Pb/238U	Age of Uranite					1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159
Lucy_237	45	45	45	206 Pb/238U	Age of Pitchblende					1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159	Chemical Analysis only
Lucy_238	377	137	257 ± 120	207Pb/206Pb	Isotopic Age of Uranite		NCL1105			1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of Pb. Analysis of 204Pb.
Lucy_239	228	218	223 ± 5	206Pb/238U	Isotopic Age of Uranite		NCL1105			1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of Pb. Analysis of 206Pb.
Lucy_240	241	211	226 ± 15	207Pb/235U	Isotopic Age of Uranite		NCL1105			1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 206Pb.
Lucy_241	399	149	274 ± 125	208Pb/232U	Isotopic Age of Uranite		NCL1105			1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of Th. Analysis of 208Pb.
Lucy_256	297	283	290 ± 7	206Pb/238U	Using Pockleys Interpretations, it is acceptable to say that South Terras, Geevor, and Wheal Owles are not reliable indications of Tertiary mineralization.					1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor	Darnley et al. (1965)		MM34_159
Lucy_257	228	218	223 ± 5	206Pb/238U	Using Pockleys Interpretations, it is acceptable to say that South Terras, Geevor, and Wheal Owles are not reliable indications of Tertiary mineralization.					1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor	Darnley et al. (1965)		MM34_159
Lucy_258	45	45	45	206Pb/238U	Using Pockleys Interpretations, it is acceptable to say that South Terras, Geevor, and Wheal Owles are not reliable indications of Tertiary mineralization.					1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor	Darnley et al. (1965)		MM34_159	Chemical age. Late infilling.
Lucy_265	290	223			The only firm conclusion about the uraninite mineralization at Geevor is that some of it must be older than 290 My. and some of it must be younger than 223 My.					1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor	Darnley et al. (1965)		MM34_159	The figure of 290 My. originally obtained from Geevor (Darnley et al., 1960), and the figure of 223 My. given here, may be mean ages of uraninite from different sections of the mine. However, from consideration of other results from the region it is likely that the figure of 290 My. is not far below the maximum age at which mineralization could have occurred.
Lucy_274	220	220	220		Galena age for Geevor Mine	galena			Galena	1296	Geevor Mine, Pendeen, St Just, Cornwall, England, UK	Geevor Mine	Darnley et al. (1965)		MM34_159	These results have been calculated using Moorbath's constants, from the tables compiled by Pockley (1961)

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...