Endeavour Segment of the Juan de Fuca Ridge: One of the Most Remarkable Places on Earth

Oceanography. 2012;25(1):44-61

 

Journal Homepage

Journal Title: Oceanography

ISSN: 1042-8275 (Print); 2377-617X (Online)

Publisher: The Oceanography Society

LCC Subject Category: Geography. Anthropology. Recreation: Oceanography

Country of publisher: United States

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS

Deborah S. Kelley
Suzanne M. Carbotte
David W. Caress
David A. Clague
John R. Delaney
James B. Gill
Hunter Hadaway
James F. Holden
Emilie E.E. Hooft
Jonathan P. Kellogg
Marvin D. Lilley
Mark Stoermer
Doug Toomey
Robert Weekly
William S.D. Wilcock

EDITORIAL INFORMATION

Peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 12 weeks

 

Abstract | Full Text

Endeavour Segment of the Juan de Fuca Ridge is one of three Integrated Study Sites for the Ridge 2000 Program. It is a remarkable, dynamic environment hosting five major hydrothermal fields, numerous smaller fields, and myriad diffuse-flow sites; magma chambers underlie all fields. Over 800 individual extinct and active chimneys have been documented within the central ~ 15 km portion of the ridge, with some edifices reaching 50 m across and up to 45 m tall. Fluid flow is focused along faults within the rift zone, and seismically active faults along the western axial valley wall have been used by both magmas and upwelling hydrothermal fluids. There is significant chemical heterogeneity in basalt compositions within the axial rift valley, with the greatest diversity occurring near the base of the western axial valley wall where normal, transitional, and enriched type mid-ocean ridge basalts occur within tens of meters of each other. Endeavour is the only site where seismic intensity has been linked directly to heat flux at the individual vent field scale. Installation of the world's first high-power and high-bandwidth cabled observatory at Endeavour via NEPTUNE Canada ensures that new discoveries along the Juan de Fuca Ridge will continue into the future.