Great Consolidated Mines, Clifford Amalgamated Mines, St Day, Gwennap CP, Cornwall, England, UK
|Latitude & Longitude (WGS84):||50° 14' 8'' North , 5° 9' 51'' West|
|Latitude & Longitude (decimal):||50.23579,-5.16422|
|Other regions containing this locality:||Devon and Cornwall metalliferous mining district, England, UK|
|Köppen climate type:||Cfb : Temperate oceanic climate|
This group of mines was formed in 1780, by amalgamation of West Wheal Virgin, Wheal Virgin, East Wheal Virgin, Wheal Lovely, Wheal Girl, and Wheal Fortune. In 1861, the Great Consolidated Mines were combined with the United Mines under the name Clifford Amalgamated Mines.
The sett is an elongated stretch of land, about 600 yards wide from north to south and more than 2,000 yards long. To the north, it is bound by the stream that flows eastwards between Carharrack and St Day and joins the Carnon river at Hale Mills. To the south, it is adjoined by the United Mines. The western boundary is about 300 yards west of the road leading from Todpool to Sunny Corner, and the eastern boundary is marked by the Carnon river. Within the sett, the mines were arranged from west to east in the order given above. The individual boundaries, however, are not always clear today.
The lodes were predominantly copper lodes, consisting of primary and secondary copper ores with pyrite in a gangue of quartz and clay. They generally trend NE to ENE, as do the elvan dykes within the sett, and crop out within a transverse distance of 500 yards. The most important lodes, from north to south, were Taylor's lode, Deebles lode and Virgin lode (Fortune lode). They dip northwards, following the dykes, but there are numerous minor lodes branching from their hangingwalls which dip southwards and cut the dykes at acute angles. In the eastern part of the sett, the lodes show comb structures with open cavities; they are disordered near crosscourses and usually thin where passing through the dykes.
All mines were still active when they were amalgamated with the United Mines in 1861. They were started as copper mines, but later also produced some tin.
The group lies within the parish of Gwennap.
Mineral ListMineral list contains entries from the region specified including sub-localities
27 valid minerals.
|Geologic Time||Rocks, Minerals and Events|
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
358.9 - 382.7 Ma
|Upper Devonian Rocks (Undifferentiated)|