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Dartmoor Forest, West Devon, Devon, England, UKi
| Regional Level Types | |
|---|---|
| Dartmoor Forest | Civil Parish |
| West Devon | Borough |
| Devon | County |
| England | Constituent Country |
| UK | Country |
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Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities16 valid minerals.
Rock Types Recorded
Rock list contains entries from the region specified including sub-localities
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Andersonite Formula: Na2Ca(UO2)(CO3)3 · 5.33H2O Habit: Distorted rhombohedra, indistinct; also massive, encrusting Colour: Yellowish Fluorescence: Reacts strongly to Long Wave UV light, emitting a diagnostic bluish-green. Description: Sparse, microscopic grains scattered across weathered surfaces associated with other fluorescent material.
Visible as tiny points of blue-green fluorescence under Long Wave UV.
Only observable at x45 and above. References: |
| ⓘ Autunite Formula: Ca(UO2)2(PO4)2 · 10-12H2O Habit: Tabular, highly metamict; encrusting Colour: Pale, dull green to greenish yellow Fluorescence: Rects strongly under Long Wave UV light with characteristic yellowish green. Description: Dull green to yellow metamict crystal groups found on weathered granite surfaces, also crustiform coatings.
Crystals to 0.5mm References: |
| ⓘ Bassetite ? Formula: Fe2+(UO2)2(PO4)2 · 10H2O Habit: Somewhat earthy in appearance Colour: dun-coloured Fluorescence: none Description: Inferred presence of Bassetite comes from the presence of a non-fluorescent, dun-coloured, earthy encrustation in direct contact with uraninite and weathered pyrite grains in the granite.
References: |
| ⓘ Becquerelite ? Formula: Ca(UO2)6O4(OH)6 · 8H2O Habit: Indeterminate - semi-crustose. Colour: brownish-yellow, appears very pale due to size of crystals. Fluorescence: Reacts under Long Wave UV: dim brownish orange Description: Appears as sparse, somewhat earthy encrustations of miniscule, brownish-yellow crystals on more exposed and weathered surfaces. As with other uranium minerals, this is associated with the weathering of uraninite in the granite.
Crystals are transparent and sufficiently small to give the impression of a pale colouration at moderate magnification (x45). |
| ⓘ Boltwoodite Formula: (K,Na)(UO2)(SiO3OH) · 1.5H2O Habit: Radial acicular groups to ~0.3mm across; also earthy, encrusting. Colour: Yellowish-brown to dull orange Fluorescence: Reacts weakly under Long Wave UV, emitting a dull brownish colour. Description: Minute earthy crusts in miarolitic cavities associated with uraninite, also with gummite crusts. References: |
| ⓘ Cassiterite Formula: SnO2 Localities: Reported from at least 9 localities in this region. |
| ⓘ 'Feldspar Group' References: |
| ⓘ Fluorite Formula: CaF2 Habit: cubic; compact and irregular Colour: White, purple to almost black Fluorescence: Barest hint of purple fluorescence under Long Wave UV Description: Compact masses partially filling cracks in the granite, associated with tourmaline veins and miarolitic cavities.
Material has been observed to form crystals about 5mm across, crystal faces rare.
Colour varies between white and purple, sometimes almost to purple-black where associated with smoky quartz and radioactive residues. Colours are zoned in many crystals. References: |
| ⓘ 'Gummite' Habit: Massive Colour: Brownish - may be mistaken for iron-stains. Description: Brown haloes associated with uraninite, often dusted with Saléeite. References: |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 References: |
| ⓘ Meta-autunite Formula: Ca(UO2)2(PO4)2 · 6H2O Habit: Tabular, highly metamict; encrusting Colour: Pale, dull green to greenish yellow Fluorescence: Rects strongly under Long Wave UV light with characteristic yellowish green. Description: Dull green to yellow metamict crystal groups found on weathered granite surfaces, also crustiform coatings.
Crystals to 0.5mm References: |
| ⓘ Opal Formula: SiO2 · nH2O |
| ⓘ Quartz Formula: SiO2 Localities: Reported from at least 9 localities in this region. |
| ⓘ Quartz var. Smoky Quartz Formula: SiO2 Habit: Prismatic to 2.5mm across. Terminations rare. Colour: Dark brown; grey; almost black Description: Protruding into or traversing miarolitic pockets in tourmaline veins in the granite, these dark quartz crystals are associated with some traces of radioactive residues.
They are minerallogically significant only in being indicative of high levels of uranium mineralisation at some earlier time. References: |
| ⓘ Saléeite Formula: Mg(UO2)2(PO4)2 · 10H2O Habit: Tabular; crustiform Colour: Lemon yellow Fluorescence: Brilliant yellow reaction under Long Wave UV.
Some yellow reaction under blue (LED) light. Description: Minute crystals and crusts on surfaces within recent cracks in miarolitic granite, also within some miarolitic voids.
Associated with uraninite and gummite. References: |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ Torbernite Formula: Cu(UO2)2(PO4)2 · 12H2O Habit: tabular Colour: Green. Fluorescence: none Description: Occasional tabular crystals associated with other uranium minerals, also as fine encrustations.
Tabular crystals are typical for the species. References: |
| ⓘ 'Tourmaline' Formula: AD3G6(T6O18)(BO3)3X3Z Localities: North Mine, Brimpts Tin Mines, Dartmoor Forest, West Devon, Devon, England, UK Black Tor Tin Pits, Princetown, Dartmoor Forest, West Devon, Devon, England, UK Eylesbarrow Mine (Wheal Ruth), Dartmoor Forest, West Devon, Devon, England, UK Hooten Wheals (Hexworthy Mine), Hexworthy, Dartmoor Forest, West Devon, Devon, England, UK Foggintor Quarry, Princetown, Dartmoor Forest, West Devon, Devon, England, UK |
| ⓘ Uraninite Formula: UO2 Habit: Irregular, granular; massive Colour: Black, brownish-black Description: Minute grains (to about 1.5mm)disseminated through miarolytic granite, often included within feldspar crystals. A small, metamict halo surrounding the grains is diagnostic.
Where broken, the uraninite gives rise to a halo of brownish stain (gummite) and other secondary minerals (saléeite, probably uranophane and possibly autunite etc.)
Also, massive in the single, visible vein within the quarry itself. References: |
| ⓘ Uranophane Formula: Ca(UO2)2(SiO3OH)2 · 5H2O Habit: Massive Colour: Brilliant lemon yellow. Fluorescence: Not fluorescent under UV light. Description: Minute crusts of lemon yellow, massive uranophane in cavities in tourmalinised granite.
Only observed at the foot of the dumps. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 3 - Halides | |||
|---|---|---|---|
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Smoky Quartz | 4.DA.05 | SiO2 |
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
| ⓘ | Uraninite | 4.DL.05 | UO2 |
| ⓘ | Becquerelite ? | 4.GB.10 | Ca(UO2)6O4(OH)6 · 8H2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| ⓘ | Andersonite | 5.ED.30 | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Autunite | 8.EB.05 | Ca(UO2)2(PO4)2 · 10-12H2O |
| ⓘ | Saléeite | 8.EB.05 | Mg(UO2)2(PO4)2 · 10H2O |
| ⓘ | Torbernite | 8.EB.05 | Cu(UO2)2(PO4)2 · 12H2O |
| ⓘ | Bassetite ? | 8.EB.10 | Fe2+(UO2)2(PO4)2 · 10H2O |
| ⓘ | Meta-autunite | 8.EB.10 | Ca(UO2)2(PO4)2 · 6H2O |
| Group 9 - Silicates | |||
| ⓘ | Boltwoodite | 9.AK.15 | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| ⓘ | Uranophane | 9.AK.15 | Ca(UO2)2(SiO3OH)2 · 5H2O |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| Unclassified | |||
| ⓘ | 'Feldspar Group' | - | |
| ⓘ | 'Gummite' | - | |
| ⓘ | 'Tourmaline' | - | AD3G6(T6O18)(BO3)3X3Z |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| H | ⓘ Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| H | ⓘ Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
| H | ⓘ Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| H | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
| H | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| B | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| C | Carbon | |
| C | ⓘ Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| O | ⓘ Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| O | ⓘ Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
| O | ⓘ Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| O | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Quartz var. Smoky Quartz | SiO2 |
| O | ⓘ Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
| O | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| O | ⓘ Uraninite | UO2 |
| O | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Na | Sodium | |
| Na | ⓘ Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| Na | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | Magnesium | |
| Mg | ⓘ Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
| Al | Aluminium | |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | Silicon | |
| Si | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
| Si | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| P | Phosphorus | |
| P | ⓘ Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| P | ⓘ Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
| P | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| P | ⓘ Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
| P | ⓘ Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
| K | Potassium | |
| K | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| Ca | Calcium | |
| Ca | ⓘ Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| Ca | ⓘ Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| Ca | ⓘ Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| Ca | ⓘ Fluorite | CaF2 |
| Ca | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| Ca | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| Fe | Iron | |
| Fe | ⓘ Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| U | Uranium | |
| U | ⓘ Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| U | ⓘ Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
| U | ⓘ Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
| U | ⓘ Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| U | ⓘ Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
| U | ⓘ Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
| U | ⓘ Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
| U | ⓘ Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
| U | ⓘ Uraninite | UO2 |
| U | ⓘ Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
Fossils
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| Wikipedia: | https://en.wikipedia.org/wiki/Dartmoor_Forest |
|---|---|
| Wikidata ID: | Q1924474 |
| GeoNames ID: | 7297597 |
Localities in this Region
- England
- England
- Devon
Other Regions, Features and Areas that Intersect
British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
- Rheno-Hercynian BeltOrogenic Belt
EuropeContinent
UK
- England
- Cornubian mining districtMining District
- Devon
- Dartmoor National ParkNational Park
- Dartmouth and Teign Valley Mining DistrictMining District
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Hooten Wheals, Hexworthy, Dartmoor Forest, West Devon, Devon, England, UK