Devonian alkalic basalt dikes of northeastern Newfoundland: evidence of a tensional environment

• Published in: Canadian Journal of Earth Sciences
• Main Author: Jayasinghe, N. R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1978
• Subjects: General Earth and Planetary Sciences; Newfoundland
• Online Access: http://dx.doi.org/10.1139/e78-090; http://www.nrcresearchpress.com/doi/pdf/10.1139/e78-090

A suite of diabase dikes intrudes granites and migmatites in the northeastern Gander Zone of Newfoundland. Rb–Sr dates on granites pre-dating and post-dating the diabases show that the dikes were emplaced in the Devonian. The mineralogy and the major and minor element chemistry of the dikes indicate that they are alkalic basalts that may have been intruded during a period of tension.