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Article
Rb-Sr Ages Of Precambrian Mafic Dikes, Bighorn Mountains, Wyoming
Geological Society of America Bulletin
  • Alan M Stueber, Miami University - Oxford
  • Richard Heimlich, Kent State University - Kent Campus
  • Mohammed Ikramuddin, Miami University - Oxford
Publication Date
6-1-1976
Document Type
Article
Disciplines
Abstract
Rb-Sr isochron data from whole-rock samples of dolerite and metadolerite indicate emplacement of dikes 2,826 ± 58 m.y. ago, during formation of the Bighorn gneiss and granitic complexes. Whole-rock samples of other dolerite dikes and mineral separates mark another intrusive event at 2,200 ± 35 m.y. B.P., well after the regional metamorphism. Two episodes of mafic dike emplacement are consistent with field relations but are not in agreement with recent K-Ar age determinations.
Comments

An edited version of this paper was published by AGU. Copyright 1974 American Geophysical Union.

Citation Information
Alan M Stueber, Richard Heimlich and Mohammed Ikramuddin. "Rb-Sr Ages Of Precambrian Mafic Dikes, Bighorn Mountains, Wyoming" Geological Society of America Bulletin Vol. 87 (1976) p. 909 - 914
Available at: http://works.bepress.com/richard_heimlich/1/