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Meldon Mine (Red-a-Ven Mine; Okehampton Wheal Maria; Devon Copper Mine), Okehampton Hamlets, West Devon, Devon, England, UKi
Regional Level Types
Meldon Mine (Red-a-Ven Mine; Okehampton Wheal Maria; Devon Copper Mine)Mine
Okehampton HamletsCivil Parish
West Devon- not defined -
DevonCounty
EnglandConstituent Country
UKCountry

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Key
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Latitude & Longitude (WGS84):
50° 42' 24'' North , 4° 1' 36'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
SX569917
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Okehampton7,647 (2018)3.9km
South Zeal912 (2018)8.3km
Exbourne358 (2018)10.6km
Hatherleigh1,518 (2018)13.2km
Beaworthy236 (2018)13.4km


One of three mines working a broken line of what De la Beche (1839) referred to as tin lodes that ran across Homerton and Longstone Hills. However, these are now considered to be a sulphide-rich mineralised bed, rather than being true lodes, and the minerals present are largely the copper, iron and arsenic sulphides.

Located on the Red-a-Ven brook above Meldon Aplite Quarry, Meldon Mine last worked in the 1920's.

Sometimes known locally as Okehampton Wheal Maria or Devon Copper Mine or Red-a-Ven mine, though this is also the name of the mine close by that operated between the aplite quarry and the West Okement River.

NB: Hamilton Jenkin (1981) differs from the above regarding the location of Okehampton Wheal Maria/Devon Copper Mine and makes no mention of a Red-a-Ven mine. Whilst HJ locates Meldon Mine here (SX 570 518), he also notes that a new set known as Devon Copper Mine, previously named Okehampton Wheal Maria, was started in 1863 on the eastern side of the West Okement River. Although a shaft was sunk to 25 fathoms (18 fathoms below adit), and despite initial promise, the working was unsuccessful and the machinery and materials were put up for auction in 1866. However, he does not equate Okehampton Wheal Maria/Devon Copper Mine with Meldon Mine and considers the location of the former uncertain.

Dines (1956) makes no mention of Okehampton Wheal Maria, Devon Copper Mine or Red-a-Ven mine.

Note on the mineral list: Helvine has been removed from the list due to the high probability of fraudulent recording of discovery by A.W.G. Kingsbury.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
British IslesGroup of Islands
Devon and Cornwall metalliferous mining district, England, UKMining District
Dartmoor National Park, Devon, England, UKNational Park
Okehampton Mining District, Devon, England, UKMining District

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


21 valid minerals. 1 erroneous literature entry.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Allophane
Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Reference: David Ifold
Andradite
Formula: Ca3Fe3+2(SiO4)3
Description: Tin-bearing.
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Arsenopyrite
Formula: FeAsS
Reference: Identified by Prof R. Scrivener Oct 2005; http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
'Axinite Group'
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Bornite
Formula: Cu5FeS4
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Chalcopyrite
Formula: CuFeS2
Reference: Identified by Prof R. Scrivener Oct 2005; http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Danburite
Formula: CaB2Si2O8
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Datolite
Formula: CaB(SiO4)(OH)
Reference: el-Sharkawi, M.A.H. and Dearman, W.R.(1961) Tin-bearing skarns from the north-west border of the Dartmoor granite, Devonshire, England. Economic Geology, 61, 366.; Dearman, W.R. (1966) Datolite from Meldon, Okehampton, Devonshire. Mineralogical Magazine, vol. 35, n° 275, 1017-1018. (referring to el-Sharkawi and Dearman 1961).; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177. (referring to el-Sharkawi and Dearman 1961).; https://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: http://www.mineralman.f9.co.uk/quarries/meldon.htm
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi; Identified by Prof R. Scrivener Oct 2005;
Grossular
Formula: Ca3Al2(SiO4)3
Description: Tin-bearing.
Reference: Dearman, W.R. (1966) Datolite from Meldon, Okehampton, Devonshire. Mineralogical Magazine, 35(275), 1017-1018.; A.G. Christy collection and unpublished analysis (beige garnet is grossular, green is andradite). Melanterite ephemeral on pyrrhotite emergent from brook.; http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi;
Hedenbergite
Formula: CaFe2+Si2O6
Reference: http://www.mineralman.f9.co.uk/quarries/meldon.htm
Helvine
Formula: Be3Mn2+4(SiO4)3S
Reference: Kingsbury, A.W.G. (1961) Beryllium Minerals in Cornwall and Devon: Helvine, Genthelvite, and Danalite. Mineralogical Magazine, 32(255), 921-940.; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, 42(322), 169-177 (referring to Kingsbury).; http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
'Heulandite subgroup'
Reference: Indentified by Prof R. Scrivener Oct 2005; Mineralogical Magazine 1966 35 : 1017-1018
'Hornblende'
Reference: http://www.mineralman.f9.co.uk/quarries/meldon.htm
Löllingite
Formula: FeAs2
Reference: el-Sharkawi, M.A.H. and Dearman, W.R.(1961) Tin-bearing skarns from the north-west border of the Dartmoor granite, Devonshire, England. Economic Geology, 61, 366.; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, 42(322), 169-177 (referring to el-Sharkawi and Dearman 1961).; Identified by Prof R. Scrivener (Oct 2005); http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Malayaite
Formula: CaSn(SiO4)O
Reference: el-Sharkawi, M.A.H. and Dearman, W.R.(1961) Tin-bearing skarns from the north-west border of the Dartmoor granite, Devonshire, England. Economic Geology, 61, 366.; Dearman, W.R. (1966) Datolite from Meldon, Okehampton, Devonshire. Mineralogical Magazine, vol. 35, n° 275, 1017-1018. (referring to el-Sharkawi and Dearman 1961); Higgins, J.B. and Ribbe, Paul H. (1977) The structure of malayaite, CaSnOSiO4, a tin analog of titanite. American Mineralogist, 62, 801-806 [Specimen in the Natural History Museum, London].; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177. (referring to el-Sharkawi and Dearman 1961); http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Reference: Melanterite ephemeral on pyrrhotite emergent from brook
Molybdenite
Formula: MoS2
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Pyrite
Formula: FeS2
Reference: Indentified by Prof R. Scrivener Oct 2005; http://www.mineralman.f9.co.uk/quarries/meldon.htm
'Pyroxene Group'
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Pyrrhotite
Formula: Fe7S8
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Quartz
Formula: SiO2
Reference: http://www.mineralman.f9.co.uk/quarries/meldon.htm
Scheelite
Formula: Ca(WO4)
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Sphalerite
Formula: ZnS
Reference: Observed Oct 2005
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Reference: http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi
Wollastonite
Formula: CaSiO3
Reference: el-Sharkawi, M.A.H. and Dearman, W.R. (1961) Tin-bearing skarns from the north-west border of the Dartmoor granite, Devonshire, England. Economic Geology, 61, 366.; Dearman, W.R. (1966) Datolite from Meldon, Okehampton, Devonshire. Mineralogical Magazine, 35(275), 1017-1018 (referring to el-Sharkawi and Dearman 1961).; Higgins, J.B. and Ribbe, P.H. (1977) The structure of malayaite, CaSnOSiO4, a tin analog of titanite. American Mineralogist, 62, 801-806.; Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, 42(322), 169-177 (referring to el-Sharkawi and Dearman 1961).; Identified by Prof R. Scrivener (Oct 2005); http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Chalcopyrite2.CB.10aCuFeS2
Löllingite2.EB.15aFeAs2
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Melanterite7.CB.35Fe2+(H2O)6SO4 · H2O
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Allophane9.ED.20(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Andradite9.AD.25Ca3Fe3+2(SiO4)3
Danburite9.FA.65CaB2Si2O8
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grossular9.AD.25Ca3Al2(SiO4)3
Hedenbergite9.DA.15CaFe2+Si2O6
Helvine ?9.FB.10Be3Mn2+4(SiO4)3S
Malayaite9.AG.15CaSn(SiO4)O
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Wollastonite9.DG.05CaSiO3
Unclassified Minerals, Rocks, etc.
'Axinite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Heulandite subgroup'-
'Hornblende'-
'Pyroxene Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Löllingite2.12.2.9FeAs2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Melanterite29.6.10.1Fe2+(H2O)6SO4 · H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Grossular51.4.3b.2Ca3Al2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Malayaite52.4.3.2CaSn(SiO4)O
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with[Si2O7] with borate groups
Danburite56.3.1.1CaB2Si2O8
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Hedenbergite65.1.3a.2CaFe2+Si2O6
Single-Width Unbranched Chains, W=1 with chains P=3
Wollastonite65.2.1.1cCaSiO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Allophane71.1.5.1(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Helvine ?76.2.4.1Be3Mn2+4(SiO4)3S
Unclassified Minerals, Mixtures, etc.
'Axinite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Heulandite subgroup'-
'Hornblende'-
'Pyroxene Group'-

List of minerals for each chemical element

HHydrogen
H MelanteriteFe2+(H2O)6SO4 · H2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H DatoliteCaB(SiO4)(OH)
H Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
BeBeryllium
Be HelvineBe3Mn42+(SiO4)3S
BBoron
B DatoliteCaB(SiO4)(OH)
B DanburiteCaB2Si2O8
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
OOxygen
O HedenbergiteCaFe2+Si2O6
O MelanteriteFe2+(H2O)6SO4 · H2O
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O ScheeliteCa(WO4)
O WollastoniteCaSiO3
O Garnet GroupX3Z2(SiO4)3
O GrossularCa3Al2(SiO4)3
O DatoliteCaB(SiO4)(OH)
O MalayaiteCaSn(SiO4)O
O Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
O AndraditeCa3Fe23+(SiO4)3
O DanburiteCaB2Si2O8
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O HelvineBe3Mn42+(SiO4)3S
FFluorine
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MgMagnesium
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al GrossularCa3Al2(SiO4)3
Al Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
SiSilicon
Si HedenbergiteCaFe2+Si2O6
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si WollastoniteCaSiO3
Si Garnet GroupX3Z2(SiO4)3
Si GrossularCa3Al2(SiO4)3
Si DatoliteCaB(SiO4)(OH)
Si MalayaiteCaSn(SiO4)O
Si Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Si AndraditeCa3Fe23+(SiO4)3
Si DanburiteCaB2Si2O8
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si HelvineBe3Mn42+(SiO4)3S
SSulfur
S MelanteriteFe2+(H2O)6SO4 · H2O
S PyrrhotiteFe7S8
S PyriteFeS2
S ChalcopyriteCuFeS2
S ArsenopyriteFeAsS
S SphaleriteZnS
S BorniteCu5FeS4
S MolybdeniteMoS2
S HelvineBe3Mn42+(SiO4)3S
CaCalcium
Ca HedenbergiteCaFe2+Si2O6
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca ScheeliteCa(WO4)
Ca WollastoniteCaSiO3
Ca GrossularCa3Al2(SiO4)3
Ca DatoliteCaB(SiO4)(OH)
Ca MalayaiteCaSn(SiO4)O
Ca AndraditeCa3Fe23+(SiO4)3
Ca DanburiteCaB2Si2O8
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MnManganese
Mn HelvineBe3Mn42+(SiO4)3S
FeIron
Fe HedenbergiteCaFe2+Si2O6
Fe MelanteriteFe2+(H2O)6SO4 · H2O
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe LöllingiteFeAs2
Fe ChalcopyriteCuFeS2
Fe ArsenopyriteFeAsS
Fe AndraditeCa3Fe23+(SiO4)3
Fe BorniteCu5FeS4
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CuCopper
Cu ChalcopyriteCuFeS2
Cu BorniteCu5FeS4
ZnZinc
Zn SphaleriteZnS
AsArsenic
As LöllingiteFeAs2
As ArsenopyriteFeAsS
MoMolybdenum
Mo MolybdeniteMoS2
SnTin
Sn MalayaiteCaSn(SiO4)O
WTungsten
W ScheeliteCa(WO4)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Late Carboniferous
298.9 - 323.2 Ma



ID: 3156150
Clackmannan Group

Age: Pennsylvanian (298.9 - 323.2 Ma)

Stratigraphic Name: Clackmannan Group

Lithology: Major:{sandstone}, Minor{siltstone,mudstone}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Moscovian - Namurian
307 - 330.9 Ma



ID: 2033663
Holsworthy Group

Age: Carboniferous (307 - 330.9 Ma)

Stratigraphic Name: Holsworthy Group

Lithology: Mudstone, siltstone and sandstone

Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. [23]

Early Carboniferous
323.2 - 358.9 Ma



ID: 3192903
Paleozoic sedimentary rocks

Age: Mississippian (323.2 - 358.9 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
De la Beche, H.T. (1839) Report on the Geology of Cornwall, Devon and West Somerset.
Dines, H.G. (1956) The metalliferous mining region of south-west England. HMSO Publications (London).
Hamilton Jenkin, A.K. (1981) The Mines of Devon: North & East of Dartmoor. Devon Library Services: Exeter.

External Links



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