Smallcleugh Mine, Nenthead, Alston Moor District, Cumbria, England, UK
|Latitude & Longitude (WGS84):||54° 46' 52'' North , 2° 19' 46'' West|
|Latitude & Longitude (decimal):||54.78136,-2.32966|
|UK National Grid Reference:||NY788430|
|Other regions containing this locality:||Northern Pennine Orefield, England, UK|
The Pennines, England, UK
|Köppen climate type:||Cfb : Temperate oceanic climate|
|Other/historical region names associated with this locality:||North Pennines; North and Western Region; Cumberland|
Smallcleugh mine is recorded to have been developed from 1770 for a short time, working a series of veins and strata bound replacement deposits (flats) believed to have been first encountered in 1776 associated with the Handsome Mea and Smallcleugh veins. Although the mine dose not appear to have gotten in to its stride until 1787. Several other veins and flat deposits were also developed be for the mines closer in the early 1900’s. In 1963 an abortive attempted was made to locate further ore reserves.The most well known account is the dinner held underground by the Masonic Lodge in the so called Ballroom Flats in 1901. The first amateur exploration of the mine may have been in the late 1960's.
Smallcleugh mine in the North Pennine Orefield is well known amongst British mineral collectors for good examples of galena, sphalerite, ankerite, and calcite to a much lesser extent quartz all of which have been collected for many years since access was regained. Excellent specimens of single black complex sphalerite crystals to 1.5cm or so on white matrix were collected from a replacement deposit above the so called Hydraulic shaft. While single galena crystals to 4cm could be collected from cavities in the strata bound replacement deposits (flats) and veins. Less well known are the secondary species mostly of zinc, copper, lead, and iron, rare nickel and manganese secondary minerals have occasionally been found. Many of the secondary minerals from Smallcleugh would be only of interest to micro-mineral collectors.Many of the flat deposits now have modern names such as Wheel Flats (from a set of orecart wheels found there, the old name may have been Browns Flat), Whit Hudsons Flat possibly an original name. Hetheringtons Flat and cross-cut again possibly an original name. Other modern names are Incline Flats (an incline level leads in to these workings), Old Fan Flats (parts of a ventilator fan found here), New Fan Flats (near the Old Fan Flats), North End Flats (?), Smallcleugh Main Flats (after the mine), The Ball Room Flat (named after a Victorian Masonic dinner party held there), Zinc Flat (from a high sphalerite content), High Flats (above the Smallcluegh Horse Level), Proud's Sump Flat (after the sump near these Flat workings), Gullyback Flats (?). The rises and sumps appear to have mostly retained their old names, here are a few of the names Spottiswood, Proud's, Luke Halls.
37 valid minerals.
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
298.9 - 323.2 Ma
|Late Carboniferous sandstone|
|Bashkirian - Visean|
315.2 - 346.7 Ma
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.