A major Late Jurassic fluid event at the basin/basement unconformity in western France: 40Ar/39Ar and K–Ar dating, fluid chemistry, and related geodynamic context

Cathelineau, ‪Michel; Boiron, Marie-Christine; Fourcade, Serge; Ruffet, Gilles; Clauer, Norbert; Belcourt, Olivier; Coulibaly, Yacouba; Banks, David; Guillocheau, François

doi:10.1016/j.chemgeo.2012.06.008

Cited by 70 publications

(72 citation statements)

References 82 publications

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“…6b). All these common features strongly suggest that the Jurassic chloritization described in Trimouns fits well with the "major Jurassic fluid event" described by Cathelineau et al (2012).…”

Section: Jurassic Metasomatic Eventsmentioning

confidence: 51%

“…Even if the titanite grains from sample Jau00-96 are hosted in the quartz, and taking into consideration the robustness of the U-Pb titanite geochronometers during the successive hydrothermal events described above, we consider that the titanite that gives a Jurassic age belongs to a different generation than the titanite formed during the lower Permian. We suggest linking the Col de Jau Mesozoic event to the "major Jurassic fluid event" because it can be compared with the youngest events described by Cathelineau et al (2012) (Fig. 6a; Table 3).…”

Section: Jurassic Metasomatic Eventsmentioning

confidence: 96%

“…These mineralizing events and the Trimouns ore deposit share three common features. All these deposits are linked to (1) brine migration (see Boiron et al 2005 for Trimouns and Cathelineau et al 2012 for others), (2) extensive tectonic regimes, and they are (3) spatially distributed around the Pyrenean rift (on both sides and within the Pyrenean domain- Fig. 6b).…”

Section: Jurassic Metasomatic Eventsmentioning

confidence: 99%

“…In the Pyrenean domain, the Jurassic is classically considered as a quiet tectonic period with only weak and distributed rifting events and small vertical movements at the transition with the Cretaceous (Ziegler and Dèzes 2006;Canérot 2008). The "quiet" Jurassic is, nonetheless, a major period for hydrothermal events as described by Cathelineau et al (2012) at the scale of Western Europe. These mineralizing events and the Trimouns ore deposit share three common features.…”

Section: Jurassic Metasomatic Eventsmentioning

confidence: 99%

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Succession of Permian and Mesozoic metasomatic events in the eastern Pyrenees with emphasis on the Trimouns talc–chlorite deposit

Boutin

Blanquat

Poujol

et al. 2015

Int J Earth Sci (Geol Rundsch)

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International audienceRecent studies proposing pre-orogenic mantle exhumation models have helped renew the interest of the geosciences community in the Pyrenees, which should be now interpreted as a hyper-extended passive margin before the convergence between Iberia and Eurasia occurred. Unresolved questions of the Pyrenean geology, as well as the understanding of the formation of hyper-extended passive margins, are how the crust was thinned, and when, where and how the crustal breakoff occurred. The study of the Variscan and pre-Variscan Pyrenean basement is thus critical to document and understand this Cretaceous crustal thinning. In order to specify the timing of Mesozoic metasomatism and the associated deformation in the pre-Mesozoic basement of the Pyrenees, we carried out a U–Th–Pb laser ablation ICP–MS study on a large panel of REE and titanium-rich minerals (titanite and rutile) from talc–chlorite ores from the eastern Pyrenees, with a special emphasis on the Trimouns deposit, the world’s largest talc quarry. Our results suggest that the Trimouns talc formation was restricted to the upper Aptian–Cenomanian time, while the talc and chlorite formation in the eastern Pyrenees occurred during several distinct Permian, Jurassic and Cretaceous episodes. These results give strong constraints on the tectonic setting of the Pyrenean domain during the transition between the Variscan and Alpine orogenic cycles, and particularly on when and how the upper crust was thinned before the crustal breakoff and the final mantle exhumation

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Section: Jurassic Metasomatic Eventsmentioning

confidence: 51%

Section: Jurassic Metasomatic Eventsmentioning

confidence: 96%

Section: Jurassic Metasomatic Eventsmentioning

confidence: 99%

Section: Jurassic Metasomatic Eventsmentioning

confidence: 99%

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Succession of Permian and Mesozoic metasomatic events in the eastern Pyrenees with emphasis on the Trimouns talc–chlorite deposit

Boutin

Blanquat

Poujol

et al. 2015

Int J Earth Sci (Geol Rundsch)

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“…OErodoñ et al (2006) 165 Ma. In turn, a ~150 Ma heat ing event has been well-doc umented in hy dro ther mal de pos its in the Black For est, Ger many (Meyer et al, 2000), and at the ba sin/base ment un con formity in west ern France (Cathelineau et al, 2012). Palaeomagnetic mea sure ments of the Cu-bear ing Kupferschiefer in east ern Ger many yielded a Late Ju ras sic palaeopole at ~150 Ma, in terpreted as ex ten sive ac tiv ity of hy dro ther mal flu ids (Symons et al, 2011).…”

Section: Fig 6 Graphical Representation Of the Available K-ar Ages mentioning

confidence: 99%

What can be learned from the K-Ar ages of illite from Rotliegend sandstones of the Fore-Sudetic Monocline, SW Poland?

Biernacka¹

2014

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Biernacka, J., 2015. What can be learned from the K-Ar ages of illite from Rotliegend sand stones of the Fore-Sudetic Monocline, SW Po land? Geo log i cal Quar terly, 59 (2): 257-270, doi: 10.7306/gq.1210The avail able K-Ar ages of authigenic illite from Rotliegend ae olian sand stones of the Fore-Sudetic Monocline, SW Po land, in clud ing those from six sam ples ex am ined in the pres ent study, are crit i cally re viewed in terms of their geo log i cal mean ing and com pared with the K-Ar ages of illite from the re main ing part of the South ern Perm ian Ba sin in Europe. The ma jor ity of ages fall in the range be tween 195 and 150 Ma, i.e. they cor re spond to Ju ras sic times. The re sults may be grouped in sev eral time in ter vals, which are al most iden ti cal to those iden ti fied for Rotliegend sand stones of Cen tral and West ern Eu rope, and which are ten ta tively in ter preted as pulses of in tense illite growth. Short-last ing illitisation is re corded only at places. More often, illitisation pro ceeded as a multi-stage pro cess, which in the north ern part of the Fore-Sudetic Monocline might have lasted un til the Cre ta ceous. The K-Ar ages of authigenic illite gen er ally co in cide with the mod elled time of gas gen er a tion from Car bon if er ous rocks and the fill ing of res er voirs in the area of the Fore-Sudetic Monocline. Pos si bly, the same un der lying pro cesses trig gered illitisation and hy dro car bon ex pul sion, or hy dro car bon mi gra tions trig gered fluid flows and illite crystallisation.

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Thermal control on the modes of crustal thinning leading to mantle exhumation: Insights from the Cretaceous Pyrenean hot paleomargins

2014

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The prerift Mesozoic sequences of the Cretaceous passive margins fossilized in the North Pyrenean Zone (NPZ) are characterized by high-temperature deformation in relation with thinning of the continental basement. Our compilation of chronological and geological data confirms a clear correlation between the distribution of the highest paleotemperatures in the prerift sedimentary cover and the loci of extreme crustal stretching. Geological evidences such as the occurrence of peridotite bodies directly underlying metamorphic prerift sediments indicate an early attenuation of the rifted continental crust. This leads us to propose a mechanism of rifting involving boudinage of the continental crust. The lateral extraction of the Paleozoic basement occurred under the prerift cover that is decoupled on the Triassic clays and evaporites. The thermal conditions allowing coeval ductile deformation of the crust and of the prerift sediments leaded to the widening of basins devoid of large faulted blocks. We discuss the implications on the origin and significance of the granulites and the relations between flysch deposition and high-temperature metamorphism of the prerift sediments. In the NPZ, Albian-Cenomanian flysch sequences were deposited synchronously with the synmetamorphic ductile deformation of the prerift sequences. Since the base of the flysch deposits also recorded locally the high-temperature tectonic event, we propose an original mechanism for the evolution of the basins involving continuous deformation of the prerift metamorphic sediments. At the scale of the Pyrenean domain, our results suggest a strong lateral variability in the tectonic style of passive margins, in direct link with their thermic pattern.

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A major Late Jurassic fluid event at the basin/basement unconformity in western France: 40Ar/39Ar and K–Ar dating, fluid chemistry, and related geodynamic context

Cited by 70 publications

References 82 publications

Succession of Permian and Mesozoic metasomatic events in the eastern Pyrenees with emphasis on the Trimouns talc–chlorite deposit

Succession of Permian and Mesozoic metasomatic events in the eastern Pyrenees with emphasis on the Trimouns talc–chlorite deposit

What can be learned from the K-Ar ages of illite from Rotliegend sandstones of the Fore-Sudetic Monocline, SW Poland?

Thermal control on the modes of crustal thinning leading to mantle exhumation: Insights from the Cretaceous Pyrenean hot paleomargins

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