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Petrologic and geochronologic evolution of the Grenville orogen, northern Blue Ridge Province, Virginia.

Tollo, Richard P; Aleinikoff, John N.; Borduas, Elizabeth A.; Hackley, Paul C.; Fanning, Christopher

Description

Basement rocks in the northern Virginia Blue Ridge include petrologically diverse granitoids and granitic gneisses that collectively record over 100 m.y. of Grenville orogenic history. New U-Pb sensitive high-resolution ion microprobe (SHRIMP) isotopic analyses of zircon indicate igneous crystallization ages of 1159 ± 14 Ma (high-silica charnockite), 1078 ± 9 Ma (leucogranite gneiss), 1060 ± 5 Ma (Old Rag magmatic series), and 1050 ± 8 Ma (low-silica charnockite). These ages, together with...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Book chapter
URI: http://hdl.handle.net/1885/86446
DOI: 10.1130/0-8137-1197-5.647

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