Combination of Δ47 and U-Pb dating in tectonic calcite veins unravel the last pulses related to the Pyrenean Shortening (Spain)

Hoareau, Guilhem; Crognier, N.; Lacroix, Brice; Aubourg, Charles; Roberts, Nick M.W.; Niemi, Nathan A.; Branellec, M.; Beaudoin, Nicolas; Ruiz, Isabel Suárez

doi:10.1016/j.epsl.2020.116636

Cited by 30 publications

(27 citation statements)

References 55 publications

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“…U-Pb dating of calcite cements reveals that the veins related to the NE-SW-directed LPS formed as early as ∼ 61 ± 3 Myr ago, while late oblique-slip reverse faults (LSFT) and post-folding E-W reverse faults were dated to 19 ± 5 and 18-14 ± 3 Ma, respectively (Hoareau et al, 2021). LPS, folding, and LSFT therefore lasted ∼ 19 Myr (61-42 Ma), ∼ 7 Myr (42-35 Ma), and ∼ 17 Myr (35-18 Ma), respectively (Fig.…”

Section: Pico Del Aguila Anticline (Pyrenees)mentioning

confidence: 99%

Dating folding beyond folding, from layer-parallel shortening to fold tightening, using mesostructures: lessons from the Apennines, Pyrenees, and Rocky Mountains

Lacombe

Beaudoin²,

Hoareau³

et al. 2021

Solid Earth

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Abstract. Dating syntectonic sedimentary sequences is often seen as the unique way to constrain the initiation, duration, and rate of folding as well as the sequence of deformation in the shallow crust. Beyond fold growth, however, deformation mesostructures accommodate the internal strain of pre-folding strata before, during, and after strata tilting. Absolute dating of syn-folding mesostructures may help constrain the duration of fold growth in the absence of preserved growth strata. Absolute dating of mesostructures related to early-folding layer-parallel shortening and late fold tightening provides an access to the timing and duration of the entire folding event. We compile available ages from the literature and provide new U–Pb ages of calcite cements from veins and faults from four folds (Apennines, Pyrenees, Rocky Mountains). Our results not only better constrain the timing of fold growth but also reveal a contraction preceding and following folding, the duration of which might be a function of the tectonic style and regional sequence of deformation. This study paves the way for a better appraisal of folding lifetime and processes and stress evolution in folded domains.

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Section: Pico Del Aguila Anticline (Pyrenees)mentioning

confidence: 99%

Dating folding beyond folding, from layer-parallel shortening to fold tightening, using mesostructures: lessons from the Apennines, Pyrenees, and Rocky Mountains

Lacombe

Beaudoin²,

Hoareau³

et al. 2021

Solid Earth

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“…We propose to build on recent methodological advances to better constrain the timing of deformation in fold-and-thrust belts and foreland basins. The development of U-Pb dating on calcite cement enables absolute dating on the tectonic vein filling and synkinematic clay minerals (e.g., [47][48][49]), clumped isotopes can be reliably used to reconstruct the exact temperature of precipitation under 90-100 • C [50], and its combination to fluid inclusion microthermometry allows to reconstruct the temperature-pressure-time path in sedimentary sequence [51]. Moreover, the understanding of how stylolites can be used as stress gauges [52,53] enables reconstruction of the burial experienced by sedimentary rocks (e.g., [7,[54][55][56][57][58][59][60]).…”

Section: Introductionmentioning

confidence: 99%

Burial-Deformation History of Folded Rocks Unraveled by Fracture Analysis, Stylolite Paleopiezometry and Vein Cement Geochemistry: A Case Study in the Cingoli Anticline (Umbria-Marche, Northern Apennines)

et al. 2021

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Unravelling the burial-deformation history of sedimentary rocks is prerequisite information to understand the regional tectonic, sedimentary, thermal, and fluid-flow evolution of foreland basins. We use a combination of microstructural analysis, stylolites paleopiezometry, and paleofluid geochemistry to reconstruct the burial-deformation history of the Meso-Cenozoic carbonate sequence of the Cingoli Anticline (Northern Apennines, central Italy). Four major sets of mesostructures were linked to the regional deformation sequence: (i) pre-folding foreland flexure/forebulge; (ii) fold-scale layer-parallel shortening under a N045 σ1; (iii) syn-folding curvature of which the variable trend between the north and the south of the anticline is consistent with the arcuate shape of the anticline; (iv) the late stage of fold tightening. The maximum depth experienced by the strata prior to contraction, up to 1850 m, was quantified by sedimentary stylolite paleopiezometry and projected on the reconstructed burial curve to assess the timing of the contraction. As isotope geochemistry points towards fluid precipitation at thermal equilibrium, the carbonate clumped isotope thermometry (Δ47) considered for each fracture set yields the absolute timing of the development and exhumation of the Cingoli Anticline: layer-parallel shortening occurred from ~6.3 to 5.8 Ma, followed by fold growth that lasted from ~5.8 to 3.9 Ma.

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“…This is consistent with the timing for late contractional episode on the North Pyrenean Thrust Front (Grool et al., 2018) and the last main peak of Pyrenean activity (Bartonian‐Priabonian) recorded in Provence (Lacombe & Jolivet, 2005). On another side, new U‐Pb on calcite studies suggest that shortening in the external units of the Pyrenees proceeded until the middle Miocene (Cruset et al., 2020; Hoareau et al., 2021; Parizot et al., 2021), which could be a consequence of the far‐field stress imposed by Africa‐Europe convergence (Jolivet, Baudin, et al., 2021; Mouthereau et al., 2021). Based on the sedimentary record, a recent study in the Gulf of Lion margin revealed that the shift between the Pyrenean contractional and extensional tectonics occurred during the late Rupelian (∼30 Ma, Séranne et al., 2021), with evidence for a rapid change in the tectonic regime.…”

Section: Discussionmentioning

confidence: 99%

Deciphering the Cenozoic Exhumation History of the Eastern Pyrenees Along a Crustal‐Scale Normal Fault Using Low‐Temperature Thermochronology

et al. 2022

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Combination of Δ47 and U-Pb dating in tectonic calcite veins unravel the last pulses related to the Pyrenean Shortening (Spain)

Cited by 30 publications

References 55 publications

Dating folding beyond folding, from layer-parallel shortening to fold tightening, using mesostructures: lessons from the Apennines, Pyrenees, and Rocky Mountains

Dating folding beyond folding, from layer-parallel shortening to fold tightening, using mesostructures: lessons from the Apennines, Pyrenees, and Rocky Mountains

Burial-Deformation History of Folded Rocks Unraveled by Fracture Analysis, Stylolite Paleopiezometry and Vein Cement Geochemistry: A Case Study in the Cingoli Anticline (Umbria-Marche, Northern Apennines)

Deciphering the Cenozoic Exhumation History of the Eastern Pyrenees Along a Crustal‐Scale Normal Fault Using Low‐Temperature Thermochronology

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