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DOI	10.1016/j.epsl.2020.116636
	Combination of Δ47 and U-Pb dating in tectonic calcite veins unravel the last pulses related to the Pyrenean Shortening (Spain)
	Hoareau G.; Crognier N.; Lacroix B.; Aubourg C.; Roberts N.M.W.; Niemi N.; Branellec M.; Beaudoin N.; Suárez Ruiz I.
发表日期	2021
ISSN	0012821X
卷号	553
英文摘要	Clumped isotopes thermometry (Δ47) and U-Pb dating of carbonates have been used to elucidate the temperature-time conditions of 10 tectonic calcite veins in the hanging wall of the South Pyrenean Frontal Thrust (Spain), the youngest thrust unit in the south-central Pyrenees. The Δ47 values indicate precipitation temperatures below ∼90 °C, in agreement with fluid inclusion analyses. 6 veins have been successfully dated, giving ages between 61 and 14.5 Ma with all but one value below 24 Ma. On the basis of our new results, we propose that several the studied veins record the end of Pyrenean tectonics in the area during the Burdigalian, possibly up to the Serravalian, younger than estimates based on magnetostratigraphic data from continental syn-tectonic deposits. Calculated δ18O values of the precipitating fluid are either very positive, suggesting a local source that has interacted with the host rock, or negative, suggesting the downward incursion of meteoric waters. For undated or pre-burial veins, the Δ47 values derived from temperature history reordering model (THRM) show that the measured Δ47 values may have been significantly altered during burial, preventing their use as a reliable thermal or paleohydrological marker. Although applied to a limited number of samples, these results highlight the great potential of the U-Pb/Δ47 approach to decipher the history of vein or cement formation and fluid flow in complex tectonic zones, provided that (i) the thermal evolution is known and (ii) the extent of clumped isotope reordering is systematically modelled. © 2020 Elsevier B.V.
关键词	carbonate U-Pb geochronology clumped isotopes fractures Pyrenees veins
英文关键词	Binary alloys; Calcite; Flow of fluids; Geochronology; Isotopes; Lead alloys; Lead compounds; Tectonics; Cement formation; Clumped isotopes; Fluid inclusion; Number of samples; Precipitation temperature; Reordering models; Temperature history; Thermal evolution; Uranium alloys; calcite; fluid flow; geochronology; host rock; tectonic evolution; tectonic setting; uranium-lead dating; vein (geology); Spain
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203133
作者单位	Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, TOTAL, LFCR, UMR5150, Pau, 64000, France; Department of Geology, Kansas State University, 108 Thompson hall, Manhattan, KS 66506, United States; NERC Isotope Geosciences Laboratory, British Geological Survey, Nottingham, United Kingdom; Department of Environmental and Earth Science, University of Michigan, United States; Instituto de Ciencia y Tecnología del Carbono INCAR-CSIC, Oviedo, Spain
推荐引用方式 GB/T 7714	Hoareau G.,Crognier N.,Lacroix B.,et al. Combination of Δ47 and U-Pb dating in tectonic calcite veins unravel the last pulses related to the Pyrenean Shortening (Spain)[J],2021,553.
APA	Hoareau G..,Crognier N..,Lacroix B..,Aubourg C..,Roberts N.M.W..,...&Suárez Ruiz I..(2021).Combination of Δ47 and U-Pb dating in tectonic calcite veins unravel the last pulses related to the Pyrenean Shortening (Spain).Earth and Planetary Science Letters,553.
MLA	Hoareau G.,et al."Combination of Δ47 and U-Pb dating in tectonic calcite veins unravel the last pulses related to the Pyrenean Shortening (Spain)".Earth and Planetary Science Letters 553(2021).