Greenlaws Mine, Daddry Shield, Stanhope, Co. Durham, England, UKi
|Regional Level Types|
|Daddry Shield||- not defined -|
|Latitude & Longitude (WGS84):||54° 43' 19'' North , 2° 10' 41'' West|
|Latitude & Longitude (decimal):||54.72222,-2.17833|
|UK National Grid Reference:||NY885364|
|Köppen climate type:||Cfb : Temperate oceanic climate|
The Greenlaws Mine is located approximately 1 km south of St. John's Chapel. Two parallel veins, the Greenlaws East and West were worked by the mine, but the east vein appears to have been far more productive. The Greenlaws East Vein was worked by the Beaumont Company between 1850 - 1884 for lead, and for a short period there-after by the Weardale Lead Company. Attempts to reopen the mine in the 1940's for fluorspar were reportedly unsuccessful. Dunham (1990) reports the presence of a small belt of cavity-bearing flats adjacent to the Greenlaws East Vein at the High Flats horizon in the Great Limestone, along with some in the upper portions of the Scar Limestone.
Superb specimens of lemon yellow fluorite from the mine (thought to be from flats in the Scar Limestone in the lower levels of the mine) are held in the collection of the Natural History Museum, London, together with other specimens collected by Arthur Russell, exhibiting a bewildering variety of colour variations.
Since 2010, a group of collectors have been rehabilitating a shaft accessing the mine and are recovering specimens of deep purple, and amber/purple zoned, fluorite. The mine is run as a managed project, with ongoing exploration and scientific research into the genesis of Weardale orebodies. Superb specimens have recently been found, of second and third generation overgrowths of fluorite crystals, overlying large crystal fragments broken from the walls of cavities. The colour variety of these is related to differing pulses of fluids, and ongoing research is aimed at understanding these, and explaining the complex crystal morphology of the overgrowths.
Regions containing this locality
|Weardale, Co. Durham, England, UK||Valley|
|Eurasian Plate||Tectonic Plate|
|British Isles||Group of Islands|
|The Pennines, England, UK||Range of Mountains and Hills|
|North Pennines Area, England, UK||Area of Outstanding Natural Beauty|
|Northern Pennine Orefield, England, UK||Ore Field|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
8 valid minerals.
Detailed Mineral List:
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|
|Group 9 - NORMAL HALIDES|
|Group 14 - ANHYDROUS NORMAL CARBONATES|
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
List of minerals for each chemical element
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
|Bashkirian - Visean|
315.2 - 346.7 Ma
323.2 - 358.9 Ma
|Early Carboniferous limestone|
323.2 - 358.9 Ma
|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.