EVOLUTION OF THE HYDROTHERMAL CIRCULATION IN A TRANSFORM-FAULT CONTEXT - THE BLANCO TROUGH (JUAN-DE-FUCA RIDGE)

Authors
MANACH G LECUYER C JUTEAU T
Citation
G. Manach et al., EVOLUTION OF THE HYDROTHERMAL CIRCULATION IN A TRANSFORM-FAULT CONTEXT - THE BLANCO TROUGH (JUAN-DE-FUCA RIDGE), Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 324(12), 1997, pp. 993-1000
Citations number
15
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes → ACNP
ISSN journal
12518050
Volume
324
Issue
12
Year of publication
1997
Pages
993 - 1000
Database
ISI
SICI code
1251-8050(1997)324:12<993:EOTHCI>2.0.ZU;2-M
Abstract
The Bianco trough (Juan de Fuca ridge) exposes a continuous section of the upper part of the oceanic crust (basalts and sheeted dykes) hydro thermally altered in a transform fault context. Coupled microthermomet ric measurements on fluid inclusions and stable oxygen isotope composi tions of secondary phases from the diabase unit were performed to inve stigate the evolution of hydrothermal fluids. The existence of a dense fracture network directly linked to the geotectonic transform fault e nvironment has maintained a still hot hydrothermal circulation (about 200 degrees C) rooted down to the top of the diabase unit.