A collection of walks, discoveries, insights and pictures of exploring Dartmoor National Park
September 18, 2020
WHEAL MARY EMMA
Steve Grigg and Frank Collinson
Wheal Mary Emma was named after the mine captains wife and is located on both sides of the River Lyd a short distance downstream from the Black Rock memorial. The mine was operational from about 1849 to 1852 but the output by all accounts wasn’t that significant. It is conjectured that the mine may well have been little more than a prospect. There are no records of the output but it has been noted that there were some fine casserite specimens. Mindat.org website states: “Cassiterite can be found in a granite hosted matrix on one side of the stream (River Lyd) and in a dark metamorphosed tourmaline rich killas on the the other side”. There were various attempts to restart the mine as part of North Dartmoor Consols before it was finally abandoned around 1880. My thanks go to Mindat.org, PlymouthU3A and a plan in Dr Phil Newmans thesis in assisting in the construction of this post.