Isotopic age study of metamorphism and intrusion in western Connecticut and southeastern New York

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ID: 301149
1968
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Abstract
K-Ar and Rb-Sr ages for a variety of metamorphic and igneous rock types are reported. K-Ar ages range from 480 m.y. to 240 m.y. Three metamorphic events affected the region. The earlier metamorphism probably occurred 460 to 480 m.y. ago; the second about 360 m.y. ago, and the third and latest about 255 m.y. ago. These ages correspond to the Taconic, Acadian, and Alleghanian orogenies. Ages reported in the literature on undeformed pegmatites and data from the present study on undeformed intrusions support this conclusion, although the data concerning the 255 m.y. event are not so conclusive. Rb-Sr whole-rock data on the Waterbury Formation give an isochron age of 465 + or - 50 m.y. Although the data do not preclude a Precambrian age for the Waterbury gneiss dome, evidence to suggest a Grenville-type age is absent.
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openalex_W2151677974 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors G. S. Clark, J. Laurence Kulp
Journal american journal of science
Year 1968
DOI
10.2475/ajs.266.10.865
URL
https://ajsonline.org/article/59205.pdf
Keywords Keywords not found

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