K-spar


Also found in: Wikipedia.

K-spar

(kā′spär′)
Mentioned in ?
References in periodicals archive ?
Further, the petrographic description of the intrusive and metamorphic units describes a widespread weak-to-moderate early and hot potassic alteration, expressed as biotite and K-spar alteration of mafic minerals and K-spar alteration of plagioclase feldspars.
Previously completed metallurgical work on a bulk sample extracted from the WBL Pit Area indicated the primary clays to be comprised of 20% to 40% kaolinite, 5% to 13% halloysite, 20% to 40% quartz and 10 to 20% k-spar.
With the primary clays located over such a large area we have the potential to define a World class halloysite deposits with significant co-product value from the kaolinite, k-spar and quartz.
The altered mylonite grades into a coarse grained k-spar granitic intrusive and defines the boundary between the hanging wall and footwall rocks.
Alteration minerals include serpentine, talc, epidote, chlorite, magnesite, dolomite, calcite, actinolite, albite, tourmaline, garnet, phlogopite, biotite, sericite and K-spar.
The showing is exposed over a 40 metre by 10 metre area and is characterized by strong and pervasive, fracture controlled K-Spar potassic alteration.
The mineral and alteration assemblages identified to date are pyrite and chalcopyrite with quartz, sericite, K-Spar, magnetite, chlorite and illite.
The alteration and lesser secondary K-spar present at Khul Morit is similar to Oyu Tolgoi (Turquoise Hill), and the full dimensions of this zone are not yet apparent.
Quartz porphyry dikes within the residual clays of the Moose Creek areas contain over 50% orthoclase K-spar.
Mineralization encountered in the Tumi D'Oro drilling has intercepted wide zones of silicification, as well as strong argillization and K-spar alteration.