Hemerdon

Some articles on hemerdon:

Hemerdon Mine - Geology
... The Hemerdon Ball granite is an outlying cupola intrusion surrounded by Devonian slates, known regionally as killas ... mineralising fluids containing metallic ores in the area around the Hemerdon mine ... The vein system is hosted in a dyke like granite body, extending from the Hemerdon Ball towards the Crownhill Down granite ...
Mining In Cornwall - Individual Mines - Hemerdon Mine
... Hemerdon Mine, alternatively known as the Hemerdon Ball or Hemerdon Bal Mine, is a historic tungsten and tin mine, 11 km (7 miles) NE of Plymouth, near Plympton, in Devon ... It lies to the north of the villages of Sparkwell and Hemerdon and adjacent to the large china clay pits near Lee Moor ...
Hemerdon Mine - History - 2007-present
... trading recommenced following the public announcement of acquiring the mineral leases for the Hemerdon Mine project ... The mineral leases were made for a period of 40 years, with the Hemerdon Mineral Trust and the Olver Trust ... The resource of over 300,000 tonnes of tungsten metal makes Hemerdon the fourth largest tungsten deposit in the world ...
Hemerdon Mine
... Hemerdon Mine, alternatively known as the Hemerdon Ball or Hemerdon Bal Mine, is a historic tungsten and tin mine ... It lies to the north of the villages of Sparkwell and Hemerdon and adjacent to the large china clay pits near Lee Moor ...
Hemerdon Mine - History - 1867-1959
... The Hemerdon tungsten-tin deposit was discovered in 1867 ... In 1917, Hemerdon Mines Ltd decided to construct a 140,00-tonne per year mill, and shortly afterwards opencast ore mining operations began. 1939 further shortages of tungsten due to WW2 led to Hemerdon Wolfram Ltd constructing a 90,000-tonne per year mill with 55% wolfram recovery, which ...