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New Brancepeth Colliery (Sleetburn Colliery), Deerness Valley, Durham Coalfield, Co. Durham, England, UK
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Witherite
New Brancepeth Colliery, Deerness Valley, Durham Coalfield, Co. Durham, England, UK
UK Grid Reference: NZ223420
Latitude: 54°46'20"N
Longitude: 1°39'11"W
 
 
Probably the best known of the barium deposits of the coalfield, being described as early as 1900.
Two workable deposits were found, the eastern one being worked for barytes between 1904 and 1921 and then re-opened in 1940.
The western deposit came into production in 1938 and most of the subsequent barium mineral production came from this area. Reported production until closure in 1955 was 221,659 tons, of which only a few percent was of witherite.

Mineral List

Alstonite
Arsenopyrite
Baryte
Calcite
Chalcopyrite
Galena
Melanterite
Pyrite
Quartz
Sphalerite
Ullmannite
Witherite


12 entries listed. 12 valid minerals.

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References

L. J. Spencer (1910) On the Occurrence of Alstonite and Ullmannite (A Species New to Britain) in a Barytes-Witherite Vein at the New Brancepeth Colliery Near Durham. Mineralogical Magazine 15:302-311

J. A. Smythe (1947) Chemical Analysis of Ullmannite from New Brancepeth, Co. Durham. Mineralogical Magazine 28:173-174

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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