Mesozoic and Cenozoic thermal history of the Western Reguibat Shield (West African Craton)

Mohamed Gouiza, Giovanni Bertotti, Paul A.M. Andriessen

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Using low-temperature thermochronology on apatite and zircon crystals, we show that the western Reguibat Shield, located in the northern part of the West African Craton, experienced significant cooling and heating events between Jurassic and present times. The obtained apatite fission track ages range between 49 and 102 Ma with mean track lengths varying between 11.6 and 13.3 μm and Dpar values between 1.69 and 3.08 μm. Zircon fission track analysis yielded two ages of 159 and 118 Ma. Apatite (U–Th)/He uncorrected single-grain ages range between 76 and 95 Ma. Thermal inverse modelling indicates that the Reguibat Shield was exhumed during the Early Cretaceous, Late Cretaceous, Palaeocene–Eocene and Quaternary. These exhumation events were coeval with regional tectonic and geodynamic events, and were probably driven by a combined effect of plate tectonics and mantle dynamics.

Original languageEnglish
Pages (from-to)135-145
Number of pages11
JournalTerra Nova
Volume30
Issue number2
DOIs
Publication statusPublished - 1 Apr 2018

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apatite
craton
shield
zircon
history
Cretaceous
thermochronology
plate tectonics
exhumation
geodynamics
Jurassic
crystal
mantle
heating
cooling
tectonics
modeling
analysis
effect

Cite this

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abstract = "Using low-temperature thermochronology on apatite and zircon crystals, we show that the western Reguibat Shield, located in the northern part of the West African Craton, experienced significant cooling and heating events between Jurassic and present times. The obtained apatite fission track ages range between 49 and 102 Ma with mean track lengths varying between 11.6 and 13.3 μm and Dpar values between 1.69 and 3.08 μm. Zircon fission track analysis yielded two ages of 159 and 118 Ma. Apatite (U–Th)/He uncorrected single-grain ages range between 76 and 95 Ma. Thermal inverse modelling indicates that the Reguibat Shield was exhumed during the Early Cretaceous, Late Cretaceous, Palaeocene–Eocene and Quaternary. These exhumation events were coeval with regional tectonic and geodynamic events, and were probably driven by a combined effect of plate tectonics and mantle dynamics.",
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Mesozoic and Cenozoic thermal history of the Western Reguibat Shield (West African Craton). / Gouiza, Mohamed; Bertotti, Giovanni; Andriessen, Paul A.M.

In: Terra Nova, Vol. 30, No. 2, 01.04.2018, p. 135-145.

Research output: Contribution to JournalArticleAcademicpeer-review

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