Mud lab
Mud lab
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INFONAME:Igneous and metamorphic rock fines
CATEGORYCATEGORY:Mine and quarry wastes
RADIO_BUTTON_UNCHECKEDSECTOR:Construction minerals
VOLCANOUK TOTAL:1,213,400 tonnes (data)
FLAGSITES:224
MAPREGION:Scotland, East Midlands
WidgetsTYPE:Crushing fines
LabelDESCRIPTION:Fines fraction from crushing and screening crushed rock construction aggregates
SCIENCETYPICAL COMPOSITION:
SiO256.5%Na2O3.1%
Al2O314.3%Fe2O38.2%
CaO5.6%TiO21.3%
MgO4.3%P2O50.3%
K2O2.6%MnO0.2%
  LOI3.3%

Mean from 7 samples (Mitchell et al. 2001)

TENANCYMINEROLOGY:Feldspar, augite, quartz (Mitchell et al. 2001)
StreamAPPEARANCE:Silt / sludge / filtercake
LINEAR_SCALEPARTICLE SIZE:< 0.063mm
WYSIWYGNOTES: 

Resources of igneous and metamorphic rocks in the UK are highly localised and the majority of material is extracted from a small number of very large or 'super' quarries, such as Glensanda in Scotland and Bardon Hill, Mountsorrel and Cliffe Hill in the midlands.

The primary use of these minerals are in the production of a crushed rock construction aggregates. The crushing, washing and screening process results in significant volumes of fine-particled residue which currently has few commercial uses.

VisibilityFURTHER READING:(BGS, 2019)
(Mitchell et al. 2001)
(Manning and Vetterlein, 2004)
(Mitchell, 2016)