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Coronadite from
Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:Coronadite
Formula:Pb(Mn64+Mn23+)O16
Comments:Green et al. (2008): "Coronadite is rare in the Caldbeck Fells. It was reported by Hartley (1959) from Dry Gill Mine and is sometimes assumed to be fairly common there, but recent research has shown that almost all of the black manganese oxide that accompanies Dry Gill campylite is romanèchite."
Habit:massive to fibrous; botryoidal
Colour:silver-white inclining to steel-grey metallic when fresh, tarnishing to dull black
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Mimetite6
- var Campylite6
Manganese Oxides5
Quartz1
Data
Mineral Data:Click here to view Coronadite data
Locality Data:Click here to view Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:3991
Long-form Identifier:1:3:3991:8
GUID (UUID V4):0
Nearest other occurrences of Coronadite
2.1km (1.3 miles) ⓘHay Gill Copper Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.3km (1.4 miles) ⓘHigher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
53.7km (33.3 miles) ⓘBurtree Slits, Cowshill, Stanhope, County Durham, England, UK
54.1km (33.6 miles) ⓘSedling Mine, Cowshill, Stanhope, County Durham, England, UK
References
Hartley, J. (1959) Coronadite from Cumberland. Mineralogical Magazine, 32(247), 343-344.
Embrey, Peter G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, 42 (322) 169-177 doi:10.1180/minmag.1978.042.322.01
Hartley, J. (1984) A list of minerals associated with the ore deposits of the Caldbeck Fells, Cumbria. Transactions of the Leeds Geological Association, 10 (3) 22-39
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
Green, D.I., Bridges, T.F., Rumsey, M.S., Leppington, C.M., Tindle, A.G. (2008) A review of the mineralogy of the Roughton Gill Mines, Caldbeck Fells, Cumbria: Part 2 The Roughton Gill South Vein on Balliway Rigg. Journal of the Russell Society, 11. 3-28
 
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