Southern
Uplands |
SOUTHERN
UPLANDS Introduction
& Geology including
photographs of |
|
Introduction The Southern Uplands include Dumfries & Galloway and the Borders regions. It is defined geologically as the area south of the Southern Uplands Fault. The fault spans the south-west coast near Ballantrae to the east coast near Dunbar, east of Edinburgh. Palaeozoic rocks, mainly Ordovician and Silurian sediments predominate, though there are small areas of Carboniferous and Permian strata. Common rock types include shales and greywackes. The area contains a few small mines and ore trial sites, either exploiting or searching for barite, hematite and copper/ lead mineralization and is similar in this fashion to the central belt of Scotland. Additionally, some less common species can also be found in the area. The
world-famous Leadhills and Wanlockhead deposit, located
roughly in the northern central part of the region, Being
Scotland's most important mineral occurence, |
SMOKY
QUARTZ - Dalbeattie,
Kirkcudbright. |
| Minerals Mineralization may occur around the small number of granitic intrusions of the area. These are of Silurian-Devonian age and form part of the "newer granite" suite, found more typically in the Scottish Highlands. The Criffel granite complex, to the south-west of Dumfries, is the main intrusive body of the area.
Principal granites (in red) of the Southern Uplands. |
At Glendinning,
in the county of Dumfries, A small deposit
of nickeline disseminated in host rock |
The
Criffel area has yielded specimens of romanecheite,
amethyst and smoky quartz as
hand specimens in recent years. Small crystals of
titanite and monazite Nevertheless, mineralization in the area, excluding Leadhills-Wanlockhead, is on a small scale. Small hand or micromount specimens are the more typical results of collecting. Nonetheless, there
are exceptions and investigation right -
QUARTZ (Amethystine Quartz) |
|
An
old, forgotten Heddle locality in Kirkcudbrightshire
which has rendered previously unrecorded,
TETRAHEDRITE (Copper Antimony Sulphide) - Barlocco Mine,
Kirkcudbrightshire. |
BARITE |
CHALCOPYRITE - |
QUARTZ - ("Japan-Law"
twins). |
The
Coatsgate Quarry, Beattock, is another example of
investigative work. A temporary exposure revealed
andratite, epidote, chabazite and other species The mineralization
here was very similar to that of Loanhead Quarry, near
Beith, in Ayrshire, SW Scotland The site, as with Loanhead Quarry, is now inaccessible. Farther east and straddling the Scotland-England border, agates may be encountered in the Cheviot Hills. They are associated with igneous rocks, like those of the typical Scottish occurences farther north. |
ANDRATITE - Coatsgate Quarry, Beattock, Dumfries. Crystals to 2mms. |
Perhaps not for everyone, "hot rocks" (radioactive minerals) are found near Dalbeattie (Kirkcudbright), at a bismuth-copper-uranium mineralization, similar in nature to the famous Schneeberg deposit in Saxony (Germany) - but on a far less grander scale. Rare species to be found include native bismuth, bismutite, eulytite, lavendulane, zeunerite, schoepite and other secondary uranium species - all mainly as micromounts. right -
Native BISMUTH |
|
the end
References/ Further Reading
Journal of the Russell
Society -
vol. 1 - Needle's Eye, Caulkerbush, Kirkcudbright - Uranium/
Bismuth deposit.
UK Journal
of Mines & Minerals -
vol. 8, pp 43-46 "Mineralization of the Kinharvie Burn
(Kirkcudbright)". M.J. McMullen & J.G. Todd (1990).
vol. 21, pp 8-27, "Twenty Years in Minerals: Scotland".
(D.I. Green/ J. G. Todd) (2001).
© Minerals of Scotland - 2008.