Secondary minibasins in orogens: Examples from the Sivas Basin (Turkey) and the sub-Alpine fold-and-thrust belt (France)

Célini, Naïm; Callot, Jean‐Paul; Pichat, Alexandre; Legeay, Etienne; Graham, Rod; Ringenbach, Jean‐Claude

doi:10.1016/j.jsg.2022.104555

Cited by 12 publications

(6 citation statements)

References 40 publications

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“…As a result of continuous propagation of the southern North Célini et al (2023). Thermal events from Célini et al (2023) and salt tectonics phases from Célini et al (2020Célini et al ( , 2022.…”

Section: Structural Frameworkmentioning

confidence: 99%

“…The SW Alps have been affected by widespread salt tectonics, related to the Upper Triassic evaporites, during their whole history since the Early Jurassic until the Mio-Pliocene (Graciansky et al, 1986;Kerckhove and Lereus, 1986;Mascle et al, 1986;Dardeau and De Graciansky, 1990;Graham et al, 2012Graham et al, , 2019Célini et al, 2020Célini et al, , 2021Célini et al, , 2022Brooke-Barnett et al, 2023). Salt motion has started during the Early Jurassic triggered by regional extension (e.g.…”

Section: Salt Tectonics In the Sw Alpsmentioning

confidence: 99%

“…In the SW Alps i.e., in the Vocontian Domain and the Digne Nappe systems, they are also known to have emplaced vertically through the sedimentary succession as diapiric structures (Goguel, 1939;Lapparent, 1940;Emre, 1977;Emre and Truc, 1978;Perthuisot and Guilhaumou, 1983;Graciansky et al, 1986;Kerckhove and Lereus, 1986;Mascle et al, 1986;Kerckhove and Lereus, 1987;Mascle et al, 1988;Dardeau and De Graciansky, 1990;, these rocks were considered since then as second-order, impacting only locally the tectonics of the SW Alps. A series of recent studies have returned to the idea of the primary importance of salt by reinterpreting well-known structures of the SW Alps based on the most recent knowledge in salt tectonics (Graham et al, 2012;Célini et al, 2020Célini et al, , 2021Célini et al, , 2022Brooke-Barnett et al, 2023;Csicsek, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Impact of Salt Tectonics on Temperatures Distribution Revealed by RSCM Thermometry in the SW Alps (France)

Célini,

Callot,

Lahfid

et al. 2024

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Evaporites have a strong impact on the structural and sedimentary evolution of sedimentary basins and fold-and-thrust belts. They also have a thermal conductivity that can be more important than other sedimentary rocks and are thus able to modify the thermal history of these sedimentary basins and fold-and-thrust belts. Even though this property is known and has been of interest for the oil and gas industry, no field examples have been studied trying to decipher how salt rock impacts temperature distribution in fold-and-thrust belts. In this paper, we use the Raman Spectroscopy on Carbonaceous Material (RSCM) to track the record of the peak thermal event around three salt structures from the southern sub-Alpine fold-and-thrust belt in SE France. These three salt structures are (1) the Astoin allochthonous salt sheet and the associated overturned megaflap, (2) the Rocher de Hongrie and (3) the Daluis diapir. Our results show that the resulting record of peak temperatures around the structures is different depending on the type of salt structure and its kinematic. The Astoin structure shows that salt tectonics during the Jurassic-Cretaceous has impacted the temperature distribution around the allochthonous salt sheet while at Daluis and the Rocher de Hongrie, the temperatures have overprinted an already existing salt-related structure. The impact of the salt structure on temperature distribution is always local but the interpretation of the RSCM temperatures may systematically be difficult without considering early salt tectonics in the structural evolution of the area.

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Section: Structural Frameworkmentioning

confidence: 99%

Section: Salt Tectonics In the Sw Alpsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Salt Tectonics on Temperatures Distribution Revealed by RSCM Thermometry in the SW Alps (France)

Célini,

Callot,

Lahfid

et al. 2024

tekt

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“…These successions belong to the former European passive margin (Gidon, 1997;Baudrimont and Dubois, 1977;Debrand-Passard et al, 1984) and have been affected by salt tectonics since the Early Jurassic including the syn-orogenic phase (e.g. Célini et al, 2020Célini et al, , 2021Célini et al, , 2022. As the margin was inverted during the Miocene, Triassic evaporites provided an efficient décollement level for the Digne Nappe (Gidon and Pairis, 1986;Gidon, 1997;Faucher et al, 1988;Lickorish and Ford, 1998).…”

Section: Geological Settingmentioning

confidence: 99%

Rift thermal inheritance in the SW Alps (France): insights from RSCM thermometry and 1D thermal numerical modelling

Célini¹,

Mouthereau

Lahfid³

et al. 2023

Solid Earth

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Abstract. Conceptual models of orogenic accretionary prisms assume that peak temperatures (Tmax⁡) increase towards the internal domains as crustal rocks are accreted from the lower to the upper plate. However, the recognition of pre-orogenic heating events in mountain belts questions the magnitude of thermal overprint during nappe stacking. Using Raman spectroscopy on carbonaceous material (RSCM) to calculate Tmax⁡, we have investigated the thermal record of Lower Jurassic to Eocene strata exposed along six stratigraphic sections at the front of the Digne Nappe (SW Alps), from the Devoluy Massif to the Castellane Arc. Our results highlight two groups of depth-dependent temperatures: (1) a regionally extensive and constant Tmax⁡ up to 300–330 ∘C measured in the Jurassic succession and (2) regionally variable lower temperatures (<150 ∘C) recorded either in the Upper Mesozoic or the syn-orogenic sequence. Modelling shows that the highest palaeotemperatures were achieved during the Early Cretaceous (∼ 130 Ma), associated with the Valaisan–Vocontian rifting, while the lowest Tmax⁡ reflect post-rift thermal relaxation in the Alpine foreland basin. This study provides a striking new example where mid-crustal palaeotemperatures measured in sediments accreted from the downgoing plate are inherited. An estimated peak thermal gradient of 80–90 ∘C km−1 requires a crustal thickness of 8–10 km during the Early Cretaceous, hence placing constraints for tectonic reconstruction of rift domains and geophysical interpretation of current crustal thickness in the SW Alps. These results call for the careful interpretation of palaeothermal data when they are used to identify past collisional thermal events. Where details of basin evolution are lacking, high-temperature records may be misinterpreted as syn-orogenic, which can in turn lead to an overestimation of both orogenic thickening and horizontal displacement in mountain belts.

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“…These series belong to the former European passive margin (Baudrimont and Dubois, 1977;Debrand-Passard et al, 1984;Gidon, 1997), highly affected by pre-and syn-orogenic salt tectonics since the Early Jurassic and during its whole history (e.g. Célini et al, 2020Célini et al, , 2021Célini et al, , 2022. As the margin was inverted during the Miocene, Triassic evaporites served as an efficient décollement level for the 90 https://doi.org/10.5194/egusphere-2022-949 Preprint.…”

Section: Geological Settingmentioning

confidence: 99%

Rift thermal inheritance in the SW Alps (France): insights from RSCM thermometry and 1D thermal numerical modelling

Célini¹,

Mouthereau

Lahfid

et al. 2022

Preprint

Self Cite

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Abstract. Conceptual models of orogenic accretionary prisms assume the increase in peak temperatures (Tmax) towards the internal domains as crustal rocks are accreted from the lower to the upper plate. Yet, the recognition of pre-orogenic heating events in mountain belts questions the magnitude of thermal overprint during nappe stacking. Using Raman Spectroscopy on Carbonaceous Material (RSCM) to calculate Tmax, we have investigated the thermal record of Lower Jurassic to Upper Cretaceous strata exposed along the Digne Nappe, at the front of the SW Alps. Our results highlight two groups of depth-dependent temperatures: (1) a regionally extensive constant Tmax up to 300–330 °C measured in the Jurassic succession and (2) regionally variable lower temperature (<150 °C) recorded either in the upper Mesozoic, the nappe stack or the syn-orogenic sequence. Modelling shows that the highest paleotemperatures were achieved during the Early Cretaceous (~130 Ma), during the Valaisan-Vocontian rifting, while the lowermost ones reflect syn-orogenic burial in the Alpine foreland basin. This study provides a striking new example where mid-crustal paleotemperatures measured in lower plate sediments now accreted at the thrust front are inherited. Estimated peak thermal gradient of 80–90 °C/km requires crustal thickness of ~15 km during the Early Cretaceous, hence placing new constraints for tectonic reconstruction of rift domains and geophysical interpretation of current crustal thickness in the SW Alps. These results call for the careful interpretation of paleothermal data when they are used to identify past collisional events. Where details of basin evolution are lacking high-temperature record may be misinterpreted as syn-orogenic, which can in turn lead to overestimating both orogenic thickening and horizontal displacement in mountain belts.

show abstract

Secondary minibasins in orogens: Examples from the Sivas Basin (Turkey) and the sub-Alpine fold-and-thrust belt (France)

Cited by 12 publications

References 40 publications

Impact of Salt Tectonics on Temperatures Distribution Revealed by RSCM Thermometry in the SW Alps (France)

Impact of Salt Tectonics on Temperatures Distribution Revealed by RSCM Thermometry in the SW Alps (France)

Rift thermal inheritance in the SW Alps (France): insights from RSCM thermometry and 1D thermal numerical modelling

Rift thermal inheritance in the SW Alps (France): insights from RSCM thermometry and 1D thermal numerical modelling

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