Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Excelsior Mine (incl. Excelsior Tunnel), Stoke Climsland, Callington District, Cornwall, England, UK

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 50° 31' 42'' North , 4° 17' 4'' West
Latitude & Longitude (decimal): 50.52833,-4.28444
UK National Grid Reference:SX381724
Köppen climate type:Cfb : Temperate oceanic climate
Other regions containing this locality:Devon and Cornwall metalliferous mining district, England, UK

Ref; Richardson.P.H.G (1991)., Mines of Dartmoor & the Tamar Valley after 1913., Deven Books, Tiverton.
Hanilton Jenkin XV 1969.
Dines 1956.

Under the name Excelsior the mine was at work at times between 1873 and 1884 on far older workings, producing 5 tons of tin ore. The Excelsior Tunnel was driven southwestward from Deerpark Wood towards the North Engine Shaft of Kit Hill looking for lodes of tin and copper. Driving of the tunnel started in 1877 and continued on and off over the next 60 years until 1938 when it was finally given up, still about 310mts short of its objective. It is however almost 1km in length and dead straight, it is possible to see the portal from the far end.
In 1959 it was receiving the attention of the Military / Atomic Energy Authority as a site to test the possibility of masking the seismic signal given out by underground nuclear tests. A history is given here with excellent photos http://www.subbrit.org.uk/sb-sites/sites/e/excelsior_tunnel/index3.shtml
However, to update the above page there are now several collapsed areas and the remaining timbering is looking very unstable. There are no mineral exposures within the tunnel and the minerals listed were most likely recovered from the now very overgrown dumps. (June 2005).

Mineral List

3 valid minerals.


Geologic TimeRocks, Minerals and Events
ⓘ Major polymetallic mineralization~270 MaCornwall, England, UK
ⓘ Porphyry dikes intruded (latest age)~275 MaCornwall, England, UK
ⓘ Greisenization (latest age)~280 MaCornwall, England, UK
ⓘ Porphyry dikes intruded (earliest age)~280 MaCornwall, England, UK
ⓘ Formation of metallized pegmatites~285 MaCornwall, England, UK
ⓘ Greisenization (earliest age)~285 MaCornwall, England, UK
ⓘ Emplacement of major plutons~295 MaCornwall, England, UK

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

Late Devonian
358.9 - 382.7 Ma

ID: 2034644
Upper Devonian Rocks (Undifferentiated)

Age: Late Devonian (358.9 - 382.7 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

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 26, 2019 08:59:02 Page generated: October 17, 2017 01:16:31
Go to top of page