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U-Pb geochronology and evolution of Mesoproterozoic basement rocks, western Connecticut

Walsh, Gregory J; Aleinikoff, John N.; Fanning, Christopher


Geologic mapping and U-Pb geochronology by ion microprobe on zircon, titanite, and monazite in the New Milford quadrangle, western Connecticut indicate Mesoproterozoic events at ca. 1.3, 1.05, and 0.99 Ga in the Laurentian basement rocks. Pink granite gneiss (1311 ± 7 Ma) intruded a paragneiss sequence during the early stages of the Elzevirian orogeny. During the Ottawan orogeny, syn-tectonic anatexis produced a belt of stromatic migmatite at 1057 ± 10 Ma. Ottawan igneous activity included...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Book chapter
Book Title: Proterozoic tectonic evolution of the Grenville orogen in North America
DOI: 10.1130/0-8137-1197-5.729


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