Origin of 87Sr enrichment in calcite cements in Jurassic limestones (Eastern Paris Basin, France)

Blaise, Thomas; Cathelineau, ‪Michel; Boulvais, Philippe; Técher, Isabelle; Boiron, Marie-Christine; Tarantola, Αlexandre; Brigaud, Benjamin; Landrein, Philippe

doi:10.1016/j.apgeochem.2021.105131

Cited by 2 publications

(1 citation statement)

References 71 publications

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“…A detailed view of the facies and diagenesis in the Jurassic strata of the eastern Paris Basin is given in Brigaud et al (2014) and Carpentier et al (2014). A succession of blocky calcite phases was evidenced that precipitated either during burial (Vincent et al 2007;Brigaud et al 2020) or during the inversion phase that occurred throughout the Cenozoic period (Buschaert et al 2004;Pagel et al 2018;Brigaud et al 2020;Blaise et al 2022). Blocky calcite of Cenozoic ages precipitated from meteoric fluids (Buschaert et al 2004) and displays a typical dull brown cathodoluminescence (Carpentier et al 2014).…”

Section: Geological Settingmentioning

confidence: 99%

Far-field brittle deformation record in the eastern Paris Basin (France)

et al. 2022

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Jurassic carbonate strata in the eastern Paris Basin exhibit several generations of faults, tension gashes and stylolites. Although their relative chronology can sometimes be determined according to cross-cutting relationships, the duration of major deformation phases and their influence on fluid flow and carbonate cementation are still uncertain. This contribution aims to clarify the timing of brittle deformation and associated calcite cementation. Tension gashes filled by calcite in Jurassic carbonates were sampled in outcrops and boreholes and dated through U–Pb geochronology. Almost all the sampled fractures were cemented during the Cenozoic period. Continuous deformation spread from c. 50 to 30 Ma. Tension gashes oriented N10° to N20° dated at 48–43 Ma show the main Pyrenean contractional stage. A second set of calcites were dated at c. 35–33 Ma and document a Late Eocene – Oligocene extension. A transition from the compressional to the extensional regime is expressed by tension gashes dated between 43 and 35 Ma. Finally, tension gashes oriented N150° to N175°, dated between 32 and 18 Ma, may result from the propagation of the horizontal stress generated by the Alpine orogen or by late Pyrenean deformation. Clumped isotope thermometry on five samples revealed both low crystallization temperatures (from 27 to 53 °C) and the meteoric origin of calcite-precipitating fluids. Our research therefore documents a continuous fracturing from Ypresian to Rupelian times, and less expressed brittle deformation during the Miocene period.

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Section: Geological Settingmentioning

confidence: 99%

Far-field brittle deformation record in the eastern Paris Basin (France)

et al. 2022

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Constraints of C‐O‐Sr Isotope and Elemental Geochemistry on Carbonate Sedimentary System Paleoenvironments of the Middle Jurassic Hepingxiang Formation, Western Simao Basin

LOU,

MIAO,

ZHENG

et al. 2024

Acta Geologica Sinica (Eng)

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Western Yunnan is an important area for Mesozoic marine strata, development of which helps to reconstruct paleoenvironments in the eastern Tethys. To bring knowledge of eastern Tethys up to that of western Tethys, this study focuses on its sedimentary characteristics and paleoenvironmental significance concentrating on the Xiushan section of the Simao Basin with analyses of the petrology, element geochemistry, and C‐O‐Sr isotopes. Samples are micrite, bioclastic limestone, marl, and mixed calcareous clastic rocks with the 87Sr/86Sr values of limestone ranging from 0.708255 to 0.708933; the δ13C values of the limestone range from –5‰ to +1.5‰ and the δ18O values range from –13.7‰ to –9.1‰. Based on the results, it is concluded that the Middle Jurassic limestones in the Simao Basin were deposited in a tidal flat environment with a strong influence of terrigenous input. At least one transgression event occurred during the depositional period. The paleoclimate as a whole changed from dry hot to humid hot and back to dry hot again. These enriched and improved results provide further data support for a comparison of the paleoenvironments between the eastern and western Tethys.

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Origin of 87Sr enrichment in calcite cements in Jurassic limestones (Eastern Paris Basin, France)

Cited by 2 publications

References 71 publications

Far-field brittle deformation record in the eastern Paris Basin (France)

Far-field brittle deformation record in the eastern Paris Basin (France)

Constraints of C‐O‐Sr Isotope and Elemental Geochemistry on Carbonate Sedimentary System Paleoenvironments of the Middle Jurassic Hepingxiang Formation, Western Simao Basin

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