Pegmatite - Goochland pegmatite district (VApgo;0)

Pegmatite - Goochland pegmatite district

Pegmatite (Goochland pegmatite district of Pegau, 1932). Leucocratic, coarse- to very-coarse-grained granite pegmatite. Mineralogy includes microcline, albite, quartz, muscovite, biotite, garnet, tourmaline, sillimanite, and graphite; rutile, ilmenite, and zircon are present locally (Pegau, 1932). Pegmatite occurs as lenticular bodies intruding porphyroblastic garnet-biotite gneiss (Ymd).

State	Virginia
Name	Pegmatite - Goochland pegmatite district
Geologic age	Proterozoic
Lithologic constituents	Major Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite
Comments	Eastern Piedmont
References	Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000. Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.
NGMDB product	NGMDB product page for 34878
Counties	Goochland

Pegmatite - Goochland pegmatite district

Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.

Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.