Dolwen Mine, Llanidloes, Powys, Wales, UK
Latitude & Longitude (WGS84): | 52° 26' 44'' North , 3° 28' 37'' West |
---|---|
Latitude & Longitude (decimal): | 52.44563,-3.47715 |
GeoHash: | G#: gcmd2gkjb |
UK National Grid Reference: | SN997841 |
Köppen climate type: | Cfb : Temperate oceanic climate |
Other/historical names associated with this locality: | , Montgomeryshire |
According to MEMOIRS OF THE GEOLOGICAL SURVEY.
SPECIAL REPORTS ON THE MINERAL RESOURCES OF GREAT BRITAIN.
VOL . XX. — LEAD AND ZINC. THE MINING DISTRICT OF NORTH CARDIGANSHIRE AND WEST MONTGOMERYSHIRE.
O. T. JONES, M.A., D.SC., PROFESSOR OF GEOLOGY AND MINERALOGY, VICTORIA UNIVERSITY, MANCHESTER (Late of the University College of Wales, Aberystwyth):
"DOLWEN OR DEBROKE.
(6-in. Sheet, Card 12 N.W., Long. 3°47’30 Lat. 52°23'15
Dolwen mine stands on the spur between the Myherin and Mynach valleys, at an altitude of nearly 1400 ft. There is no road within a considerable distance of the mine and access to it is difficult. In spite of these handicaps it maintained a fairly high output of ore for several years. The lode ranges S.W. towards Tygwyn or Mynach Vale mine, and dips to the south-east at 65°
to 70°. It is several feet wide and consists of brecciated mudstones belonging to the Frongoch formation, with quartz.
The main workings were carried out from an underlie shaft on the summit of the hill, and were partially drained by a shallow adit. The lode cannot be traced continuously in a south-westerly direction, but at a distance of half a mile, near the River Mynach, there are old shafts and an adit (about
870 O.D.) on a similar lode and having the same dip and strike. At this point it enters the Tygwyn property on the south side of the stream."
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsDetailed Mineral List:
ⓘ Baryte Formula: BaSO4 Reference: Paul Render |
ⓘ Calcite Formula: CaCO3 Reference: Paul Render |
ⓘ Chalcopyrite Formula: CuFeS2 Reference: Paul Render |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 Reference: Paul Render |
ⓘ Quartz Formula: SiO2 Reference: Paul Render |
ⓘ Witherite Formula: BaCO3 Reference: Paul Render |
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | 'Chalcopyrite' | 2.CB.10a | CuFeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | 'Quartz' | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | 'Calcite' | 5.AB.05 | CaCO3 |
ⓘ | 'Malachite' | 5.BA.10 | Cu2(CO3)(OH)2 |
ⓘ | 'Witherite' | 5.AB.15 | BaCO3 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | 'Baryte' | 7.AD.35 | BaSO4 |
List of minerals arranged by Dana 8th Edition classification
Group 2 - SULFIDES | |||
---|---|---|---|
AmBnXp, with (m+n):p = 1:1 | |||
ⓘ | Chalcopyrite | 2.9.1.1 | CuFeS2 |
Group 14 - ANHYDROUS NORMAL CARBONATES | |||
A(XO3) | |||
ⓘ | Calcite | 14.1.1.1 | CaCO3 |
ⓘ | Witherite | 14.1.3.2 | BaCO3 |
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN | |||
ⓘ | Malachite | 16a.3.1.1 | Cu2(CO3)(OH)2 |
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES | |||
AXO4 | |||
ⓘ | Baryte | 28.3.1.1 | BaSO4 |
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks | |||
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si | |||
ⓘ | Quartz | 75.1.3.1 | SiO2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Malachite | Cu2(CO3)(OH)2 |
C | Carbon | |
C | ⓘ Calcite | CaCO3 |
C | ⓘ Malachite | Cu2(CO3)(OH)2 |
C | ⓘ Witherite | BaCO3 |
O | Oxygen | |
O | ⓘ Baryte | BaSO4 |
O | ⓘ Calcite | CaCO3 |
O | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Witherite | BaCO3 |
Si | Silicon | |
Si | ⓘ Quartz | SiO2 |
S | Sulfur | |
S | ⓘ Baryte | BaSO4 |
S | ⓘ Chalcopyrite | CuFeS2 |
Ca | Calcium | |
Ca | ⓘ Calcite | CaCO3 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Ba | Barium | |
Ba | ⓘ Baryte | BaSO4 |
Ba | ⓘ Witherite | BaCO3 |
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
Silurian 419.2 - 443.8 Ma ID: 3185808 | Paleozoic sedimentary rocks Age: Silurian (419.2 - 443.8 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] |
Silurian 419.2 - 443.8 Ma ID: 3160805 | Silurian claystone |
Llandovery 433.4 - 443.8 Ma ID: 2034671 | Llandovery Rocks (Undifferentiated) Age: Llandovery (433.4 - 443.8 Ma) Lithology: Mudstone, siltstone and sandstone Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. [23] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License