1. Open Access Kent State
  2. Rb-Sr Ages Of Precambrian Mafic Dikes, Bighorn Mountains, Wyoming
Author(s)
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.
Format
Article
Publication Date
1976-06-01
Publication Title
Geological Society of America Bulletin
Volume
87
First Page
909
Last Page
914
Subject
Community
Department of Geology
Comments

An edited version of this paper was published by AGU. Copyright 1974 American Geophysical Union.
Permalink https://oaks.kent.edu/geolpubs/11
Stueber, A., Heimlich, R., & Ikramuddin, M. (1976). Rb-Sr Ages Of Precambrian Mafic Dikes, Bighorn Mountains, Wyoming. Geological Society of America Bulletin. https://oaks.kent.edu/node/1922
Stueber, Alan, Richard Heimlich, and Mohammed Ikramuddin. 1976. “Rb-Sr Ages Of Precambrian Mafic Dikes, Bighorn Mountains, Wyoming”. Geological Society of America Bulletin. https://oaks.kent.edu/node/1922.
Stueber, A., R. Heimlich, and M. Ikramuddin. Rb-Sr Ages Of Precambrian Mafic Dikes, Bighorn Mountains, Wyoming. Geological Society of America Bulletin, 1 June 1976, https://oaks.kent.edu/node/1922.