Mesozoic sequence of Fuerteventura (Canary Islands): Witness of Early Jurassic sea-floor spreading in the central Atlantic

Details

Serval ID
serval:BIB_95AB70E1269C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Mesozoic sequence of Fuerteventura (Canary Islands): Witness of Early Jurassic sea-floor spreading in the central Atlantic
Journal
Geological Society of America Bulletin
Author(s)
Steiner C., Hobson A., Favre P., Stampfli G.M., Hernandez J.
ISSN-L
0016-7606
Publication state
Published
Issued date
1998
Peer-reviewed
Oui
Volume
110
Pages
1304-1317
Language
english
Notes
ISI:000076214700006
Abstract
The Fuerteventura Jurassic sedimentary succession consists of oceanic
and elastic deposits, the latter derived from the southwestern Moroccan
continental margin. Normal mid-oceanic-ridge basalt (N-MORB) flows and
breccias are found at the base of the sequence and witness sea-floor
spreading events in the central Atlantic. These basalts were extruded in
a postrift environment (post-late Pliensbachian), We propose a Toarcian
age for the Atlantic oceanic floor in this region, on the basis of the
presence higher up in the sequence of the Bositra buchi filament
microfacies (Aalenian-Bajocian) and of elastic deposits reflecting
tectono-eustatic events (e.g,, late Toarcian to mid-Callovian erosion of
the rift shoulder). The S-l sea-floor oceanic magnetic anomaly west of
Fuerteventura is therefore at least Toarcian in age.
The remaining sequence records Atlantic-Tethyan basinal facies (e.g.,
Callovian-Oxfordian red clays, Aptian-Albian black shales) alternating
with elastic deposits (e.g., Kimmeridgian-Berriasian periplatform
calciturbidites and a Lower Cretaceous deep-sea fan system).
The Fuerteventura N-MORB outcrops represent the only Early Jurassic
oceanic basement described so far in the central Atlantic. They are
covered by a 1600 m, nearly continuous sedimentary sequence which
extends to Upper Cretaceous facies.
Create date
20/10/2012 18:11
Last modification date
20/08/2019 14:57
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