Mineralogy: kyanite + quartz + muscovite ± graphite ± pyrite ± garnet; kyanite constitutes as much as 30 percent of the rock. Kyanite-bearing quartzites and schists have been correlated with quartzose muscovite schists that occur locally at the base …
The metasedimentary Arvonia Formation in the Piedmont Province of central Virginia ranges primarily from slates to garnet schists, which unconformably overly Middle Ordovician metavolcanic rocks of the Chopawamsic arc terrane.
Geology and Mineral Resources - Buckingham County - Virginia
Resources that might be considered for future evaluation and development include kyanite and slate, with substantial reserves in the areas of current mining, and granite gneiss in the southern part of the County with a potential for crushed-stone purposes. Kyanite-bearing quartzite also occurs west of Sheppards on Woods Mountain.
World's Largest Kyanite Mine, world record at Willis Mountain, Virginia
2024年5月22日 · "The world’s largest kyanite mine (Kyanite Mining Corporation) at Willis Mt. in central Virginia is within the Piedmont region of the Appalachian Mountains," The Conference Exchange says. "The kyanite is found within quartzites and schists, which are part of the metasedimentary Arvonia Fm.
London and Virginia Mine (Eldridge Mine; Project-15-148), Gold-Pyrite …
London and Virginia Mine (Eldridge Mine; Project-15-148), Gold-Pyrite Belt, Buckingham Co., Virginia, USA : Commodities (Major) - Gold; (Trace) - Sulfur - Iron Pyrite, Copper, Silver, Zinc, Lead Host Rock: Quartzite, Slate, Mica Schist Tectonic …
Associated with or close to the gold are stratiform, massive sulfide deposits, largely pyrite, but locally enriched by zinc, copper, and lead minerals. Little gold has been found in stratabound massive sulfides of the western Piedmont where the sulfide is mostly pyrrhotite.
Arvonia Formation - Kyanite quartzite and schist (VAOkq;0)
White to light-gray, medium- to coarse-grained, well-foliated, locally crinkle-folded, quartzose kyanite schist and kyanite-bearing quartzite. Mineralogy: kyanite + quartz + muscovite ± graphite ± pyrite ± garnet; kyanite constitutes as much as 30 percent of the rock.
Kyanite Quartzites in the Piedmont Province of Virginia: Evidence …
2007年5月1日 · The metasedimentary Arvonia Formation in the Piedmont Province of central Virginia ranges primarily from slates to garnet schists, which unconformably overly Middle Ordovician metavolcanic...
Petrogenesis of the Willis Mountain and East Ridge kyanite …
Data from active alteration zones and mineral equilibria suggest that the kyanite quartzite was formed from intermediate volcanic rocks by hydrothermal action of acidic fluids (pH 2 to 4) at a temperature between 100 and 200°C under mildly oxidizing conditions.
Regional Geochemical Constraints on the Petrogenesis of Kyanite ...
Kyanite quartzite is a minor but distinctive rock type that occurs throughout the Piedmont Province of central Virginia. The origin of these quartzites has been debated, with suggested protoliths ranging from aluminous sandstone to hydrothermally altered volcanic rock.