Symmetry vs. asymmetry of a hyper-thinned rift: Example of the Mauléon Basin (Western Pyrenees, France)

Saspiturry, Nicolas; Razin, Philippe; Baudin, Thierry; Serrano, Olivier; Issautier, Benoît; Lasseur, Éric; Allanic, Cécile; Thinon, Isabelle; Leleu, Sophie

doi:10.1016/j.marpetgeo.2019.03.031

Cited by 51 publications

(92 citation statements)

References 87 publications

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“…The Bidarray fault also affects the lower to middle Jurassic limestones in the area and the latest Albian to Cenomanian St.-Etienne de Baïgorry breccias (Merle, 1974). The offset of the Bidarray fault is interpreted as being of Cenomanian age (Saspiturry et al, 2019). Helium thermochronometric data from zircon reveal elevation-invariant ages of ca.…”

Section: Structural Scheme Of the Basque Massifsmentioning

confidence: 98%

“…In the Western Pyrenees, the North Pyrenean Zone is represented by the Cretaceous Mauléon Basin, thrusted to the north onto the Aquitaine domain and bordered to the south by the Axial Zone. The Mauléon Basin is bounded to the west by Paleozoic crustal blocks known as the Basque massifs (Heddebaut, 1973;Muller and Roger, 1977) and is underlain by mantle rock at depths less than 10 km (Wang et al, 2016), making it a hyperextended Cretaceous rift basin (Jammes et al, 2009;Lagabrielle et al, 2010;Masini et al, 2014;Tugend et al, 2014;Teixell et al, 2016;Saspiturry et al, 2019). The Bidarray Basin lies between the Mauléon Basin and the Basco-Cantabric Basin, a similar hyperextended rift basin of Cretaceous age (Rat et al, 1983;Quintana et al, 2015;Ducoux, 2017) (Fig.…”

Section: Present-day Structure Of the Western Pyreneesmentioning

confidence: 99%

“…Therefore, Late Triassic to Early Jurassic extension and drifting that affected the cooled lithosphere may have been localized farther west within a narrower Permian-Triassic rift zone (Leleu et al, 2016) or along crustal-scale inherited structures (e.g., Le Roy and Piqué, 2001). The previously homogeneously thinned crust of the Pyrenees was later affected by Early Cretaceous hyperextension and mantle exhumation (Jammes et al, 2009;Lagabrielle et al, 2010;Masini et al, 2014;Teixell et al, 2016;Saspiturry et al, 2019).…”

Section: Implications For the Transition Between The Variscan Orogenimentioning

confidence: 99%

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Tectono-sedimentary evolution of a rift system controlled by Permian post-orogenic extension and metamorphic core complex formation (Bidarray Basin and Ursuya dome, Western Pyrenees)

et al. 2019

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Section: Structural Scheme Of the Basque Massifsmentioning

confidence: 98%

Section: Present-day Structure Of the Western Pyreneesmentioning

confidence: 99%

Section: Implications For the Transition Between The Variscan Orogenimentioning

confidence: 99%

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Tectono-sedimentary evolution of a rift system controlled by Permian post-orogenic extension and metamorphic core complex formation (Bidarray Basin and Ursuya dome, Western Pyrenees)

et al. 2019

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“…350-300 Ma) in the Pyrenees is characterized by a polyphased deformation, accompanied by a HT-LP metamorphism, migmatization and granitic magmatism (Denèle et al, 2014). During the Permian, the opening of sedimentary basins in the Pyrenees (Bixel and Lucas, 1987;Lago et al, 2004;Saspiturry et al, 2019) induced reheating of the NPM (Bixel and Lucas, 1987;Briqueu and Innocent, 1993;Lago et al, 2004;Denèle et al, 2012;Asti et al, 2019). Then, the Cretaceous extensional event resulted in an early crustal thinning and in fragmentation of the NPM (Costa and Maluski, 1988;Vauchez et al, 2013).…”

Section: Geological Setting 21 the North Pyrenean Zone And The Aulusmentioning

confidence: 99%

The sapphirine-bearing rocks in contact with the Lherz peridotite body: New mineralogical data, age and interpretation

Uzel

Lagabrielle

Fourcade

et al. 2020

BSGF - Earth Sci. Bull.

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Sapphirine-bearing rocks are described in the Aulus Basin (Ariège, France) in a contact zone between the Lherz peridotitic body and Mesozoic metasediments which underwent the Pyrenean Cretaceous high-temperature, low-pressure metamorphic event (Monchoux, 1970, 1972a, 1972b). Sapphirine crystals occur in layered clastic deposits characterized by an uncommon suite of Al-Mg-rich minerals. A detailed petrographic study of sixteen samples representative of the diversity of the Lherz sapphirine-bearing rocks is presented. These rocks include breccias and microbreccias with various compositions. Some samples are composed of polymineralic clasts and isolated minerals that derive from regionally well-known protoliths such as ultramafic rocks, meta-ophites, “micaceous hornfels”, and very scarce Paleozoic basement rocks. Nevertheless, a large portion of the sapphirine-bearing clastic suite is composed of mono- and polymineralic debris that derive from unknown protolith(s). We define a "sapphirine-bearing mineral suite” (SBMS) composed of monomineralic debris including: sapphirine + enstatite + aluminous spinel + Mg-amphiboles + Ca-amphiboles + kornerupine + accessory minerals (apatite, diopside, rutile, serpentine, smectite, tourmaline, vermiculite and a white mica). We highlight the dominance of metamorphic Keuper clastic materials in the studied rocks and the presence of inclusions of anhydrite and F-, Cl-, Sr-rich apatite in minerals of the Al-Mg-rich suite. The brecciated texture and the presence of unequivocal sedimentary features suggest that the sapphirine-bearing rocks were mechanically disaggregated and then experienced winnowing in underwater conditions with poor mixing between the different sources. We measured U-Pb rutile age data in order to provide constraints on the age of (one of) the protolith(s) of those clastic deposits. The obtained age (98.6 + 1.2 Ma) is interpreted as the age of metamorphism of this protolith of the SBMS. Previous works interpreted the Lherz sapphirine-bearing rocks as crustal protoliths modified at depth along the contact with the ultramafic rocks of the Lherz body during their ascent towards shallower depths. These new data imply: (i) an Upper Triassic to Lower Jurassic origin for the main protolith of the sapphirine-bearing rocks; (ii) the metamorphism of this protolith along an active hot crust–mantle detachment during Cenomanian times with the involvement of metasomatic, brine-type fluids; and (iii) its brecciation during the exhumation of the material due to the evolution of the detachment, followed by subsequent sedimentary reworking of the metamorphic material.

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“…In this context, the Leiza‐Aralar Thrust System corresponds to the inversion of the extensional detachment system that led to an exhumed/unroofed mantle domain in the axis of the Cretaceous extensional system (DeFelipe et al, ). East of the PTZ, the exhumation domain is displaced toward the north, in the Mauléon basin (e.g., Jammes et al, , ; Saspiturry et al, ). This is another argument to support that the Cinco Villas massif belonged to the European side of the rift, whereas Alduides and Oroz‐Betelu massifs belonged to the Iberian side.…”

Section: Geological Settingmentioning

confidence: 99%

Unraveling the Mesozoic and Cenozoic Tectonothermal Evolution of the Eastern Basque‐Cantabrian Zone–Western Pyrenees by Low‐Temperature Thermochronology

et al. 2019

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Low‐temperature thermochronology studies have increased our knowledge of the orogenic processes along the Pyrenean‐Cantabrian mountain belt by placing time constraints on the exhumation history of its rocks. However, a significant gap in the data existed between the western Pyrenees and the central Cantabrian Mountains, hampering a comprehensive view of the tectonothermal evolution along the belt. We present a new apatite fission track and zircon (U‐Th)/He (ZHe) data set for the eastern Basque‐Cantabrian zone–western Pyrenees. Apatite fission track central ages cluster in the Eocene‐Oligocene. ZHe samples can be separated into two groups: Group 1 depicts clustered ZHe ages‐eU concentration (Cinco Villas massif) and Group 2 depicts dispersed ZHe ages‐eU concentration (Alduides massif and a Paleozoic rock pinned along the Leiza thrust). A sample from the Oroz‐Betelu massif shows intermediate behavior. Inverse modeling suggests that samples from Group 1 reached 240–280 °C in the Late Cretaceous, implying deep sedimentary burial of the Cinco Villas massif before its major exhumation phase, most probably in the early to middle Eocene, postdating the phase of rapid exhumation of the western part of the Leiza thrust. The sample from the Oroz‐Betelu massif, far from the Mesozoic exhumed mantle domain, experienced maximum temperatures close to 200 °C by burial beneath the Jaca‐Pamplona basin. It was later exhumed in the hanging wall of the Gavarnie thrust in the Bartonian‐Priabonian. This work provides new insights into the tectonothermal evolution of the Basque massifs and the inversion of a hyperextended margin.

show abstract

Symmetry vs. asymmetry of a hyper-thinned rift: Example of the Mauléon Basin (Western Pyrenees, France)

Cited by 51 publications

References 87 publications

Tectono-sedimentary evolution of a rift system controlled by Permian post-orogenic extension and metamorphic core complex formation (Bidarray Basin and Ursuya dome, Western Pyrenees)

Tectono-sedimentary evolution of a rift system controlled by Permian post-orogenic extension and metamorphic core complex formation (Bidarray Basin and Ursuya dome, Western Pyrenees)

The sapphirine-bearing rocks in contact with the Lherz peridotite body: New mineralogical data, age and interpretation

Unraveling the Mesozoic and Cenozoic Tectonothermal Evolution of the Eastern Basque‐Cantabrian Zone–Western Pyrenees by Low‐Temperature Thermochronology

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