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Determining the cooling history of in situ lower oceanic crust - Atlantis Bank, SW Indian Ridge

John, Barbara; Foster, David; Murphy, John; Cheadle, Michael; Baines, A Graham; Fanning, Christopher; Copeland, Peter

Description

The cooling history and therefore thermal structure of oceanic lithosphere in slow-spreading environments is, to date, poorly constrained. Application of thermochronometric techniques to rocks from the very slow spreading SW Indian Ridge provide for the first time a direct measure of the age and thermal history of in situ lower oceanic crust. Crystallization of felsic veins (∼850°C) drilled in Hole 735B is estimated at 11.93 ± 0.14 Ma, based on U-Pb analyses of zircon by ion probe. This...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
URI: http://hdl.handle.net/1885/80316
Source: Earth and Planetary Science Letters
DOI: 10.1016/j.epsl.2004.02.014

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