Proterozoic Tectonic Evolution of the Grenville Orogen in North America

Geology and geochemistry of granitic and charnockitic rocks in the central Lovingston massif of the Grenvillian Blue Ridge terrane
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Published:January 01, 2004
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Scott S. Hughes, Sharon E. Lewis, Mervin J. Bartholomew, A. Krishna Sinha, Norman Herz, 2004. "Geology and geochemistry of granitic and charnockitic rocks in the central Lovingston massif of the Grenvillian Blue Ridge terrane", Proterozoic Tectonic Evolution of the Grenville Orogen in North America, Richard P. Tollo, James McLelland, Louise Corriveau, Mervin J. Bartholomew
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Basement rocks of the Lovingston massif in the central Blue Ridge anticlinorium include jotunite, anorthosite, charnockitic rocks, and related Fe-Ti oxide- and apatite-rich rocks that display strong similarities to lithologic assemblages elsewhere in the Grenville orogen. The rock units preserve evidence of a protracted history of granulite-facies metamorphism and plutonism from ca. 1.15 to ca. 1.0 Ga, followed by multiple episodes of lower-grade Paleozoic metamorphism. New whole-rock major-and trace-element data indicate systematic chemical trends, incompatible element enrichments relative to the lower crust, and overall uniformity among Lovingston rocks. Quantitative geochemical models and field associations support interpretation of the Grenvilleage Archer...