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Nant Mine, Nant-y-Gadwen, Aberdaron, Gwynedd, Wales, UKi
Regional Level Types
Nant MineMine
Nant-y-Gadwen- not defined -
AberdaronCommunity
GwyneddCounty
WalesCountry
UKCountry

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Latitude & Longitude (WGS84):
52° 48' 21'' North , 4° 39' 21'' West
Latitude & Longitude (decimal):
52.80583,-4.65583
GeoHash:
G#: gcksqj18r
GRN:
N36W03
UK National Grid Reference:
SH210265
Type:
Mine
Kรถppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Abersoch783 (2017)10.3km
Mynytho536 (2017)10.6km
Llanbedrog613 (2017)12.8km
Morfa Nefyn857 (2017)15.8km
Nefyn1,373 (2017)17.0km
Mindat Locality ID:
145126
Long-form identifier:
mindat:1:2:145126:2
GUID (UUID V4):
0
Other/historical names associated with this locality:
Caernarvonshire


The southernmost of a small group of manganese mines near the village of Rhiw. The group, which included the Bennalt and Rhiw mines was the largest producer of manganese ore in the UK in the early 20th century. Nant Mine raised 45,644 tons of manganese ore prior to its closure in 1927.

Caryopilite (first UK occurrence) and pyroxmanganite (first Welsh occurrence) both occur as thin orange-brown veins in siliceous, massive manganese ore.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


11 valid minerals.

Detailed Mineral List:

โ“˜ Calcite
Formula: CaCO3
โ“˜ Caryopilite
Formula: Mn2+3Si2O5(OH)4
โ“˜ Celsian
Formula: Ba(Al2Si2O8)
โ“˜ Fluorapatite
Formula: Ca5(PO4)3F
โ“˜ Ganophyllite
Formula: (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
โ“˜ Jacobsite
Formula: Mn2+Fe3+2O4
โ“˜ Neotocite
Formula: (Mn,Fe)SiO3 · H2O (?)
Description: Massive, dark brown to black, breaking into dark olive-green to brown translucent fragments.
โ“˜ Pyroxmangite
Formula: Mn2+SiO3
โ“˜ Rhodochrosite
Formula: MnCO3
โ“˜ Rhodonite
Formula: CaMn3Mn[Si5O15]
โ“˜ Tephroite
Formula: Mn2+2SiO4

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
โ“˜Jacobsite4.BB.05Mn2+Fe3+2O4
Group 5 - Nitrates and Carbonates
โ“˜Calcite5.AB.05CaCO3
โ“˜Rhodochrosite5.AB.05MnCO3
Group 8 - Phosphates, Arsenates and Vanadates
โ“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
โ“˜Tephroite9.AC.05Mn2+2SiO4
โ“˜Rhodonite9.DK.05CaMn3Mn[Si5O15]
โ“˜Pyroxmangite9.DO.05Mn2+SiO3
โ“˜Caryopilite9.ED.15Mn2+3Si2O5(OH)4
โ“˜Neotocite9.ED.20(Mn,Fe)SiO3 ยท H2O (?)
โ“˜Ganophyllite9.EG.30(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 ยท 8H2O
โ“˜Celsian9.FA.30Ba(Al2Si2O8)

List of minerals for each chemical element

HHydrogen
Hโ“˜ CaryopiliteMn32+Si2O5(OH)4
Hโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
Hโ“˜ Neotocite(Mn,Fe)SiO3 · H2O (?)
CCarbon
Cโ“˜ CalciteCaCO3
Cโ“˜ RhodochrositeMnCO3
OOxygen
Oโ“˜ CalciteCaCO3
Oโ“˜ CaryopiliteMn32+Si2O5(OH)4
Oโ“˜ CelsianBa(Al2Si2O8)
Oโ“˜ FluorapatiteCa5(PO4)3F
Oโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
Oโ“˜ JacobsiteMn2+Fe23+O4
Oโ“˜ Neotocite(Mn,Fe)SiO3 · H2O (?)
Oโ“˜ PyroxmangiteMn2+SiO3
Oโ“˜ RhodochrositeMnCO3
Oโ“˜ RhodoniteCaMn3Mn[Si5O15]
Oโ“˜ TephroiteMn22+SiO4
FFluorine
Fโ“˜ FluorapatiteCa5(PO4)3F
NaSodium
Naโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
AlAluminium
Alโ“˜ CelsianBa(Al2Si2O8)
Alโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
SiSilicon
Siโ“˜ CaryopiliteMn32+Si2O5(OH)4
Siโ“˜ CelsianBa(Al2Si2O8)
Siโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
Siโ“˜ Neotocite(Mn,Fe)SiO3 · H2O (?)
Siโ“˜ PyroxmangiteMn2+SiO3
Siโ“˜ RhodoniteCaMn3Mn[Si5O15]
Siโ“˜ TephroiteMn22+SiO4
PPhosphorus
Pโ“˜ FluorapatiteCa5(PO4)3F
KPotassium
Kโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
CaCalcium
Caโ“˜ CalciteCaCO3
Caโ“˜ FluorapatiteCa5(PO4)3F
Caโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
Caโ“˜ RhodoniteCaMn3Mn[Si5O15]
MnManganese
Mnโ“˜ CaryopiliteMn32+Si2O5(OH)4
Mnโ“˜ Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
Mnโ“˜ JacobsiteMn2+Fe23+O4
Mnโ“˜ Neotocite(Mn,Fe)SiO3 · H2O (?)
Mnโ“˜ PyroxmangiteMn2+SiO3
Mnโ“˜ RhodochrositeMnCO3
Mnโ“˜ RhodoniteCaMn3Mn[Si5O15]
Mnโ“˜ TephroiteMn22+SiO4
FeIron
Feโ“˜ JacobsiteMn2+Fe23+O4
Feโ“˜ Neotocite(Mn,Fe)SiO3 · H2O (?)
BaBarium
Baโ“˜ CelsianBa(Al2Si2O8)

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
UK

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Cotterell, T. F. (2006) Caryopilite and Pyroxmangite from Nant Mine, Nant-y-Gadwen, Llanfaelrhys, Pen Llyn, Gwynedd, Wales. Uk Journal of Mines and Minerals 27, 51-53
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