Volcanism, age, and hydrothermal deposits of the West Valley segment, Juan de Fuca Ridge

M. I. Leybourne, N. A. Van Wagoner

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

West Valley is a rift valley that forms part of the northernmost segment of Juan de Fuca Ridge. Photographic images were obtained using a deeply towed camera sled. Pillow and lobate lavas were the most common flow types observed. The flows may be as young as a few hundred to as old as 2000 yr. The youngest lavas are associated with small axial volcanoes that form an en echelon pattern within the valley. Newly discovered hydrothermal sulphide mounds and chimneys are spatially associated with moderately young pillow and lobate flows near the base of a small axial volcano. The area is moderately tectonically disrupted, with the most pervasive tectonism localized at the margins of the valley. -from Authors

Original languageEnglish
Pages (from-to)2346-2352
Number of pages7
JournalCanadian journal of earth sciences
Volume29
Issue number11
Publication statusPublished - 1992
Externally publishedYes

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