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 Stephen-in-Brannel, Cornwall, England, UK

Oldest recorded age at locality: 811
Youngest recorded age at locality: 11

mindat Locality ID: 18545
mindat URL: http://www.mindat.org/loc-18545.html

Tectonic Settings:

Total number of sublocalities beneath "St Stephen-in-Brannel, Cornwall, England, UK": 38
Total number of bottom-level sublocalities: 27

Number of Child Localities: 11
Child Localities:
Coombe
Crow Hill
Currian Vale
Downderry
Foxhole
Melbur
Slip China Stone Quarry
South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine)
St Stephen
Treviscoe
Whitemoor

Latitude: 50°20'54"N
Longitude: 4°52'52"W
Decimal Degree (lat, lon): 50.348333333333,-4.8811111111111

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.

Alunite	Amorphous	Amphibole	Andalusite	Apatite	Arsenic	Arsenopyrite	Autunite	Baryte	Brochantite
Calcite	Chalcophyllite	Chalcopyrite	Chlorite	Clay	Cobaltite	Columbite	Copper	Coronadite	Corundum
Cristobalite	Diaspore	Feldspar	Fluorite	Fritzscheite	Garnet	Kaolinite	Kaňkite	Löllingite	Marcasite
Mica	Mixite	Natroautunite	Nickeline	None	Not in a structural group	Perovskite	Pharmacosiderite	Pyrite	Quartz
Rocksalt	Rutile	Skutterudite	Sphalerite	Spinel	Stannite	Stibnite	Talc	Topaz	Tourmaline
Vivianite	Wavellite	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 Au B Ba Be Bi C Ca Cl Co Cu F Fe H K Li Mg Mn Na Ni O P Pb S Si Sn U V W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Alunite Amorphous Amphibole Andalusite Apatite Arsenic Arsenopyrite Autunite Baryte Brochantite
Calcite Chalcophyllite Chalcopyrite Chlorite Clay Cobaltite Columbite Copper Coronadite Corundum
Cristobalite Diaspore Feldspar Fluorite Fritzscheite Garnet Kaolinite Kaňkite Löllingite Marcasite
Mica Mixite Natroautunite Nickeline None Not in a structural group Perovskite Pharmacosiderite Pyrite Quartz
Rocksalt Rutile Skutterudite Sphalerite Spinel Stannite Stibnite Talc Topaz Tourmaline
Vivianite Wavellite Zippeite Zircon

78 IMA Minerals at location:

Actinolite ()*	Akaganeite ()*	Andradite ()*	Anglesite ()*	Annabergite ()*
Arsenopyrite ()*	Asbolane ()*	Autunite ()*	Baryte ()*	Bassetite ()*
Bertrandite ()*	Bismuth ()*	Bismuthinite ()*	Bornite ()*	Brochantite ()*
Cassiterite ()*	Chalcocite ()*	Chalcophyllite ()*	Chalcopyrite ()*	Clinochlore ()*
Clinosafflorite ()*	Cobaltite ()*	Coffinite ()*	Copper ()*	Cristobalite ()*
Cuprite ()*	Erythrite ()*	Ferberite ()*	Fluellite ()*	Fluorapatite ()*
Fluorite ()*	Francevillite ()*	Galena ()*	Goethite ()*	Gold ()*
Hematite ()*	Jarosite ()*	Kaňkite ()*	Kaolinite ()*	Kasolite ()*
Magnetite ()*	Marcasite ()*	Metasaléeite ()*	Metatorbernite ()*	Metavanuralite ()*
Metazeunerite ()*	Mixite ()*	Muscovite ()*	Nickeline ()*	Nickelskutterudite ()*
Olivenite ()*	Opal ()*	Orthoclase ()*	Parasymplesite ()*	Parsonsite ()*
Pharmacosiderite ()*	Pyrite ()*	Quartz ()*	Rossmanite ()*	Rutherfordine ()*
Safflorite ()*	Saléeite ()*	Schorl ()*	Scorodite ()*	Siderite ()*
Skutterudite ()*	Sphalerite ()*	Stannite ()*	Talc ()*	Topaz ()*
Torbernite ()*	Tremolite ()*	Trögerite ()*	Uraninite ()*	Wavellite ()*
Wittichenite ()*	Zeunerite ()*	Zippeite ()*

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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	811	11	2	119006,119017	3419
Akaganeite ()*	Coronadite	(Fe³⁺,Ni²⁺)₈(OH,O)₁₆Cl_1.25·nH₂O	811	11	1	119017	63
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	811	11	1	119017	1534
Anglesite ()*	Baryte	Pb(SO₄)	811	11	1	119017	2734
Annabergite ()*	Vivianite	Ni₃(AsO₄)₂·8H₂O	811	11	2	119008,119017	445
Arsenopyrite ()*	Arsenopyrite	FeAsS	811	11	6	119000,119006,119008,119009,119012,119017	9052
Asbolane ()*	Not in a structural group	Mn⁴⁺(O,OH)₂·(Co,Ni,Mg,Ca)_x(OH)_2x·nH₂O	811	11	1	119017	143
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	811	11	2	119012,119017	1272
Baryte ()*	Baryte	Ba(SO₄)			1	119008	11547
Bassetite ()*	None	Fe²⁺(UO₂)₂(PO₄)₂(H₂O)₁₀	811	11	1	119017	51
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂	811	11	1	119017	606
Bismuth ()*	Arsenic	Bi			1	119006	1966
Bismuthinite ()*	Stibnite	Bi₂S₃	811	11	3	119006,119008,119017	1935
Bornite ()*	None	Cu₅FeS₄	811	11	1	119017	5516
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	811	11	1	119017	1633
Cassiterite ()*	Rutile	SnO₂	811	11	15	118997,118998,119005,119006,119007,119008,119009,119010,119012,119014,119017,119019,119020,119023,119028	5171
Chalcocite ()*	None	Cu₂S	811	11	1	119017	5707
Chalcophyllite ()*	Chalcophyllite	Cu₁₈Al₂(AsO₄)₄(SO₄)₃(OH)₂₄·36H₂O	811	11	1	119017	194
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	811	11	6	119006,119008,119009,119010,119012,119017	27198
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	811	11	1	119017	1756
Clinosafflorite ()*	Löllingite	CoAs₂			1	119008	21
Cobaltite ()*	Cobaltite	CoAsS			1	119008	966
Coffinite ()*	Zircon	U(SiO₄)·nH₂O	811	11	1	119017	566
Copper ()*	Copper	Cu	811	11	3	119006,119008,119017	3846
Cristobalite ()*	Cristobalite	SiO₂	268.6	260.2	1	119014	453
Cuprite ()*	Not in a structural group	Cu₂O	811	11	1	119017	2970
Erythrite ()*	Vivianite	Co₃(AsO₄)₂·8H₂O	811	11	2	119008,119017	814
Ferberite ()*	Columbite	Fe²⁺(WO₄)			1	119012	551
Fluellite ()*	None	Al₂(PO₄)F₂(OH)·7H₂O			1	119012	40
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F			2	119012,119022	2740
Fluorite ()*	Fluorite	CaF₂	811	11	4	119006,119009,119012,119017	9617
Francevillite ()*	Fritzscheite	Ba(UO₂)₂(VO₄)₂·5H₂O	811	11	1	119017	43
Galena ()*	Rocksalt	PbS	140	80	3	119000,119008,119017	24243
Goethite ()*	Diaspore	FeO(OH)			1	119028	7437
Gold ()*	Copper	Au			1	119006	30554
Hematite ()*	Corundum	Fe₂O₃	811	11	2	119017,119025	14640
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆	811	11	1	119017	2228
Kaňkite ()*	Kaňkite	Fe³⁺(AsO₄)·3.5H₂O	811	11	1	119017	38
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	268.6	260.2	3	119006,119014,119016	5591
Kasolite ()*	None	Pb(UO₂)(SiO₄)·H₂O	811	11	1	119017	198
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	811	11	2	119008,119017	14899
Marcasite ()*	Marcasite	FeS₂	811	11	1	119017	5674
Metasaléeite ()*	None	Mg(UO₂)₂(PO₄)₂·8H₂O	811	11	1	119017	11
Metatorbernite ()*	None	Cu(UO₂)₂(PO₄)₂·8H₂O	811	11	1	119017	443
Metavanuralite ()*	None	Al(UO₂)₂(VO₄)₂(OH)·8H₂O	811	11	1	119017	4
Metazeunerite ()*	None	Cu(UO₂)₂(AsO₄)₂·8H₂O	811	11	1	119017	182
Mixite ()*	Mixite	Cu₆Bi(AsO₄)₃(OH)₆·3H₂O	811	11	1	119017	168
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	268.6	260.2	3	119012,119014,119027	17380
Nickeline ()*	Nickeline	NiAs			1	119008	633
Nickelskutterudite ()*	Skutterudite Perovskite	(Ni,Co,Fe)As₃			1	119008	176
Olivenite ()*	Andalusite	Cu₂(AsO₄)(OH)	811	11	2	119017,119020	492
Opal ()*	Amorphous	SiO₂·nH₂O	811	11	3	119012,119016,119017	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	268.6	260.2	1	119014	2349
Parasymplesite ()*	Vivianite	Fe²⁺₃(AsO₄)₂·8H₂O			1	119008	124
Parsonsite ()*	None	Pb₂(UO₂)(PO₄)₂	811	11	1	119017	63
Pharmacosiderite ()*	Pharmacosiderite	KFe³⁺₄(AsO₄)₃(OH)₄·6-7H₂O	811	11	3	119008,119017,119020	428
Pyrite ()*	Pyrite	FeS₂	811	11	4	119000,119006,119008,119017	39462
Quartz ()*	Quartz	SiO₂	811	11	11	118995,119000,119006,119007,119008,119012,119016,119017,119025,119027,119028	61156
Rossmanite ()*	Tourmaline	(Al₂Li)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	282.5	273.7	1	119030	37
Rutherfordine ()*	None	(UO₂)(CO₃)	811	11	1	119017	58
Safflorite ()*	Löllingite	CoAs₂			1	119008	317
Saléeite ()*	None	Mg(UO₂)₂(PO₄)₂(H₂O)₁₀	811	11	1	119017	95
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	811	11	3	119006,119014,119017	2705
Scorodite ()*	None	Fe³⁺(AsO₄)·2H₂O	811	11	3	119008,119017,119020	1153
Siderite ()*	Calcite	Fe(CO₃)	811	11	3	119006,119008,119017	6417
Skutterudite ()*	Skutterudite Perovskite	CoAs₃	811	11	1	119017	531
Sphalerite ()*	Sphalerite	ZnS	811	11	2	119000,119017	21482
Stannite ()*	Stannite Sphalerite	Cu₂FeSnS₄			1	119012	668
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			1	119012	3337
Topaz ()*	Topaz	Al₂SiO₄F₂	268.6	260.2	1	119014	1476
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	811	11	4	118996,119012,119017,119019	1059
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂			1	119012	2562
Trögerite ()*	Natroautunite	(H₃O)(UO₂)(AsO₄)·3H₂O	811	11	1	119017	22
Uraninite ()*	Fluorite	UO₂	811	11	3	118996,119008,119017	2718
Wavellite ()*	Wavellite	Al₃(PO₄)₂(OH)₃·5H₂O			1	119012	374
Wittichenite ()*	None	Cu₃BiS₃	811	11	1	119017	297
Zeunerite ()*	Autunite	Cu(UO₂)₂(AsO₄)₂·12H₂O	811	11	1	119017	185
Zippeite ()*	Zippeite	K₂[(UO₂)₄(SO₄)₂O₂(OH)₂](H₂O)₄	811	11	1	119017	175

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Lucy_118	Brannel Elvan is 6 km west of St Austells

11 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	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Lucy_118	285	275	280 ± 5	Rb/Sr	Previous Rb/Sr determination				18545	St Stephen-in-Brannel, Cornwall, England, UK	Brannel Elvan	Bray and Spooner (1983)	10.1144/GSL.SP.1964.001.01.15	EG78_1064
Lucy_276	140	140	140		Galena age for Crow Hill	galena		Galena	222020	Crowhill Mine (Crow Hill Mine; New Crow Hill Mine; Trevanion Mine), Crow Hill, St Stephen-in-Brannel, Cornwall, England, UK	Crow Hill	Darnley et al. (1965)		MM34_159	These results have been calculated using Moorbath's constants, from the tables compiled by Pockley (1961)
Lucy_140	268.6	260.2	264.4 ± 4.2	K/Ar	Previous K/Ar determination		258		1194	Melbur China Clay Pit, Melbur, St Stephen-in-Brannel, Cornwall, England, UK	Melbur	Bray and Spooner (1983)	10.1144/GSL.SP.1964.001.01.15	EG78_1064
Lucy_236	49	45	47 ± 2	206 Pb/238U	Age of Pitchblende				1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159
Lucy_252	811	11	411 ± 400	207Pb/206Pb	Isotopic Age of Pitchblende-Coffinite		NCL1103		1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of Pb. Analysis of 204Pb.
Lucy_253	49	45	47 ± 2	206Pb/238U	Isotopic Age of Pitchblende-Coffinite		NCL1103		1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 206Pb.
Lucy_254	64	46	55 ± 9	207Pb/235U	Isotopic Age of Pitchblende-Coffinite		NCL1103		1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159	(Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 207Pb.
Lucy_260	230	220	225 ± 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.				1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159	Mean of two analyses
Lucy_261	49	45	47 ± 2	206Pb/238U	Using Pockleys Interpretations, it is acceptable to say that South Terras, Geevor, and Wheal Owles are not reliable indications of Tertiary mineralization.				1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159
Lucy_277	80	80	80		Galena age for South Terras	galena		Galena	1327	South Terras Mine (Resugga & Tolgarrick Mine; Union Mine; Uranium Mine), St Stephen-in-Brannel, Cornwall, England, UK	South Terras	Darnley et al. (1965)		MM34_159	These results have been calculated using Moorbath's constants, from the tables compiled by Pockley (1961)
Lucy_139	282.5	273.7	278.1 ± 4.4	K/Ar	Previous K/Ar determination		254		1186	Dorothy China Clay Pit, Whitemoor, St Stephen-in-Brannel, Cornwall, England, UK	Dorothy	Bray and Spooner (1983)	10.1144/GSL.SP.1964.001.01.15	EG78_1064

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...