The extension discrepancy at North Atlantic non-volcanic rifted margins: depth-dependent stretching or unrecognised faulting?.

Reston, Timothy J. (2007) The extension discrepancy at North Atlantic non-volcanic rifted margins: depth-dependent stretching or unrecognised faulting?. Geology, 35 . pp. 367-370. DOI 10.1130/G23213A.1 .

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Abstract

Rifted margins show an apparent discrepancy between the amount of extension measurable from faults and the amount of crustal or lithospheric thinning determined from wide-angle data or subsidence. This extension discrepancy has been interpreted in terms of depth-dependent stretching in which the upper crust is extended and thinned far less than the rest of the lithosphere. Here I show that at those nonvolcanic margins where the velocity structure is well known, the upper and lower crust appear to thin equally toward the margin, implying that the discrepancy is not due to depth-dependent stretching, but more likely due to unrecognized polyphase and top basement faulting.

Document Type: Article
Keywords: extension, rifted margins, polyphase, heterogeneous
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1130/G23213A.1
ISSN: 0091-7613
Date Deposited: 15 Jan 2009 22:31
Last Modified: 24 Oct 2019 12:14
URI: http://oceanrep.geomar.de/id/eprint/2286

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