I visited Blakemere Pit, a former Fluorspar quarry, on the 9th September 2017. The quarry is remotely located with no vehicular access.
Access is via either Blakelow Lane from Bonsall Lane or Blakemere Lane from Bonsallmoor Lane. Either of these routes involves a walk along a heavily rutted track with the possibility of meeting off road motorbike riders which often use these lanes. Parking is possible at the entrance to Blakemere Lane but you do so at your own risk as stones may get thrown up by passing motorbikes. I actually cycled from the top of Winster village on this occasion.
The site is gated and consists of an overgrown access track which takes you down to the quarry itself and bends round and continues up to the higher ground to the north. The main pit (quarry) is now pretty much overgrown with nature having reclaimed it.
Background
I was unable to find any real information on the history of this
Fluorspar working other than it appears to have been worked up to the
late 1980s.
It's presently privately owned and under a restoration order to have the
land restored to it's original agricultural usage buy infilling. This
work has not been carried out to date but is overdue and subject to some
dispute. It seems a shame to me as it provides an interesting
alternative habitat for wildlife to the hundreds of acres of flat
moorland surrounding it.
Mineralogy
I could find little information regarding the mineralogy other than it
being a former Fluorspar quarry and some references to Malachite having
been found here.
Minerals Found
The most common mineral found was, not surprisingly, Fluorspar. It
appears to occur in three colours depending on the height within the
limestone strata. A deep dark purple variety occurs in the upper
reaches of the quarry, with clear examples beneath and finally a Citrine
coloured variety towards the bottom of the pit.
There are some good examples of clear Fluorspar lining some of the quarried faces and on some of the fallen boulders.
I also found Calcite, Galena, Pyromorphite, possible Smithsonite, Micro
crystals of Sphalerite (Zinc Blende), a pale blue Hydrozincite and what
looks like Copper Pyrite as inclusions in Fluorspar crystals.
|
BLAKEMERE LANE ACCESS - UNSUITABLE FOR NORMAL ROAD VEHICLES |
|
GATED ENTRANCE - VIEWED FROM INSIDE THE QUARRY |
|
QUARRY TRACK WITH PIT ON FAR RIGHT |
|
QUARRY TRACK AND SOME WELCOME SUNSHINE |
|
CLEAR FLUORSPAR CRYSTALS ON CLIFF FACE |
|
DOG TOOTH CALCITE CRYSTALS IN CLIFF FACE CAVITY |
|
PURPLE FLUORSPAR |
|
CLEAR FLUORSPAR CRYSTALS WITH CHALCOPYRITE INCLUSIONS |
|
CITRINE COLOURED FLUORSPAR CRYSTALS |
|
PYROMOPRHITE WITH SMALL UNKNOWN NODULES (LIGHT BROWN) PROBABLY SMITHSONITE |
|
CLOSE UP OF NODULES (Taken using a digital microscope) |
|
GALENA IN FLUORSPAR |
|
HYDROZINCITE - WITH AN UNUSUAL PALE BLUE COLOUR |
|
HYDROZINCITE CLOSE UP - APPEARS WHITE UNDER THE MICROSCOPE. THE SPECIMEN ALSO CONTAINS MICRO ZINC BLENDE CRYSTALS |
No comments:
Post a Comment