André Michard
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View article: Tectonic map and structural architecture of the "Briançonnais Zone" (Western Alps)
Tectonic map and structural architecture of the "Briançonnais Zone" (Western Alps) Open
In the Southwestern Alps, tectonic units derived from the Briançonnais passive margin are exposed in two domains (Michard et al., 2022 and references therein): (i) the “Briançonnais Zone s.l.”, dominated by Mesozoic s…
View article: Extension of a lower plate passive margin coeval with subduction of the adjacent slab: The Western Alps and Maghrebides cases
Extension of a lower plate passive margin coeval with subduction of the adjacent slab: The Western Alps and Maghrebides cases Open
The Piemonte-Ligurian-Maghrebian Tethys or “Alpine Tethys” developed at the western tip of the Tethys Ocean between Eurasia and Gondwana. The evolution of the Alpine Tethys during the post-Pangea rifting and oceanic expansion f…
View article: Late extension of a passive margin coeval with subduction of the adjacent slab: The Western Alps and Maghrebides files
Late extension of a passive margin coeval with subduction of the adjacent slab: The Western Alps and Maghrebides files Open
The evolution of the Alpine Tethys margins during the beginning of the African-Eurasian convergence was little studied compared to their evolution during the post-Pangea rifting and oceanic expansion, i.e. , from the Early Jurassic to the …
View article: Early exhumation of the Beni Bousera granulites and peridotites at the northern margin of the westernmost Tethys (Rif belt, Morocco); new constraints from overlying marbles
Early exhumation of the Beni Bousera granulites and peridotites at the northern margin of the westernmost Tethys (Rif belt, Morocco); new constraints from overlying marbles Open
<p>The West Mediterranean Alpine belts of the Rif and its northern counterpart, the Betics, are famous for the subcontinental peridotites exposed in their Internal zones (Alboran Domain), the Beni Bousera (BB) and Ronda massifs, resp…
View article: The Beni Bousera marbles, record of a Triassic-Early Jurassic hyperextended margin in the Alpujarrides-Sebtides units (Rif belt, Morocco)
The Beni Bousera marbles, record of a Triassic-Early Jurassic hyperextended margin in the Alpujarrides-Sebtides units (Rif belt, Morocco) Open
The timing and process of exhumation of the subcontinental peridotites of the Gibraltar Arc (Ronda, Beni Bousera) have been discussed extensively over the last decades. In this work, we contribute to this debate through the first mapping, …
View article: Comment on “The Mesozoic Margin of the Maghrebian Tethys in the Rif Belt (Morocco): Evidence for Polyphase Rifting and Related Magmatic Activity” by Gimeno‐Vives et al.
Comment on “The Mesozoic Margin of the Maghrebian Tethys in the Rif Belt (Morocco): Evidence for Polyphase Rifting and Related Magmatic Activity” by Gimeno‐Vives et al. Open
Key Points The main Mesorif gabbros emplaced in a Liassic oceanic domain and do not belong to the Central Atlantic Magmatic Province (CAMP) CAMP dolerites may occur separately next to the oceanic gabbros in the structurally complex Mesorif…
View article: From extension to compression: high geothermal gradient during the earliest Variscan phase of the Moroccan Meseta; a first structural and RSCM thermometric study
From extension to compression: high geothermal gradient during the earliest Variscan phase of the Moroccan Meseta; a first structural and RSCM thermometric study Open
International audience
View article: Liassic age of an oceanic gabbro of the External Rif (Morocco): Implications for the Jurassic continent–ocean boundary of Northwest Africa
Liassic age of an oceanic gabbro of the External Rif (Morocco): Implications for the Jurassic continent–ocean boundary of Northwest Africa Open
This work concerns the northernmost limit of the West African Craton (WAC) and Variscan WAC-related terranes of NW Africa. Based on newly obtained radiometric age of an oceanic gabbro from the “Mesorif Suture Zone” of the External Rif Belt…
View article: The West African Craton and its margins. Foreword
The West African Craton and its margins. Foreword Open
International audience
View article: Can we apply the RSCM geothermometry approach to study the thermal history of a complex tectono-metamorphic context: the Jebilet massif (Variscan Belt, Morocco)?
Can we apply the RSCM geothermometry approach to study the thermal history of a complex tectono-metamorphic context: the Jebilet massif (Variscan Belt, Morocco)? Open
International audience
View article: Saghro Group in the Ougnat Massif (Morocco), an evidence for a continuous Cadomian basin along the northern West African Craton
Saghro Group in the Ougnat Massif (Morocco), an evidence for a continuous Cadomian basin along the northern West African Craton Open
The Saghro Group (SG) is a folded, low-grade volcano-sedimentary series up to 8 km thick that crops out within and to the north of the Pan-African suture zone in the central and eastern Anti-Atlas. Here we describe the SG of the Ougnat inl…