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Allenheads Mine (Beaumont Mine), Allendale, Northumberland, England, UK
Allenheads Mine (Beaumont Mine), Northern Pennine Orefield, England, UK
Allenheads Mine (Beaumont Mine), Weardale, Co. Durham, England, UK

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Latitude & Longitude (WGS84): 54° 48' 11'' North , 2° 13' 4'' West
Latitude & Longitude (decimal): 54.80306,-2.21778
GeoHash:G#: gcwrv894f
UK National Grid Reference:NY860454
Locality type:Mine
Köppen climate type:Cfb : Temperate oceanic climate

The most productive mine in the orefield under the Beaumonts and subsequently the Weardale Lead Co., who started working the mine in the 1940's for fluorspar.
The British Steel Corporation began the re-opening of the mine in 1969-70, under the name Beaumont Mine. Unfortunately, the hoped-for reserves of fluorspar were not found and by 1983, with all the equipment still intact, pumping had ceased and the mine was at a standstill.

While the mine failed to produce the anticipated commercial product, some important specimen finds occurred during the British Steel operation. Most notable were the pale lavender, twinned fluorites associated with sphalerite and siderite found circa 1970 in the remnants of flats along the Diana Vein.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Allenheads Mine (Beaumont Mine), East Allendale, North Pennines, Northumberland, England, UK

Regions containing this locality

Northern Pennine Orefield, England, UK

Ore Field - 137 mineral species & varietal names listed

Weardale, Co. Durham, England, UK

Valley - 92 mineral species & varietal names listed

The Pennines, England, UK

Range of Mountains and Hills - 258 mineral species & varietal names listed

North Pennines Area, England, UK

Area of Outstanding Natural Beauty - 169 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

10 valid minerals.

Detailed Mineral List:

Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 167-171
Formula: CaCO3
Reference: Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 167-171
Formula: CuFeS2
Reference: Manfred Schoenfelder
Formula: CaMg(CO3)2
Reference: Manfred Schoenfelder
Formula: CaF2
Reference: Fluorite: The Collector's Choice. Extra Lapis English No. 9
Formula: PbS
Formula: FeS2
Reference: Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 167-171
Formula: SiO2
Reference: Dunham, Sir K. C. Geology of the North Pennine Orefield, Volume 1 Tyne to Stainmore (2nd Edition), pp 167-171
Formula: FeCO3
Reference: Fluorite: The Collector's Choice. Extra Lapis English No. 9
Formula: ZnS
Reference: Fluorite: The Collector's Choice. Extra Lapis English No. 9

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 3 - Halides
Group 4 - Oxides and Hydroxides
Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
AmBnXp, with (m+n):p = 1:1
AmBnXp, with (m+n):p = 1:2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si

List of minerals for each chemical element

C AnkeriteCa(Fe2+,Mg)(CO3)2
C CalciteCaCO3
C DolomiteCaMg(CO3)2
C SideriteFeCO3
O AnkeriteCa(Fe2+,Mg)(CO3)2
O CalciteCaCO3
O DolomiteCaMg(CO3)2
O QuartzSiO2
O SideriteFeCO3
F FluoriteCaF2
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg DolomiteCaMg(CO3)2
Si QuartzSiO2
S ChalcopyriteCuFeS2
S GalenaPbS
S PyriteFeS2
S SphaleriteZnS
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca CalciteCaCO3
Ca DolomiteCaMg(CO3)2
Ca FluoriteCaF2
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
Fe SideriteFeCO3
Cu ChalcopyriteCuFeS2
Zn SphaleriteZnS
Pb GalenaPbS

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

Late Carboniferous
298.9 - 323.2 Ma

ID: 3160982
Late Carboniferous sandstone

Age: Pennsylvanian (298.9 - 323.2 Ma)

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]

Bashkirian - Visean
315.2 - 346.7 Ma

ID: 2036067
Yoredale Group

Age: Carboniferous (315.2 - 346.7 Ma)

Stratigraphic Name: Yoredale Group

Lithology: Limestone, sandstone, siltstone and mudstone

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

Early Carboniferous
323.2 - 358.9 Ma

ID: 3186080
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, used under Creative Commons Attribution 4.0 License


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Dunham, K. C., 1990, Geology of the North Pennines Orefield, v. 1, 2nd ed., British Geological Survey, 299 p.

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