Fluid transfers at the basement/cover interface

Fourcade, Serge; Cathelineau, ‪Michel; Buschaert, Stéphane; Cathelineau, M.; Freiberger, R.; Coulibaly, Yacouba; Aranyossy, Jean-François

doi:10.1016/s0009-2541(02)00192-4

Cited by 21 publications

(11 citation statements)

References 30 publications

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“…This foliation is related to at least two folding events caused by Chantraine et al, 1996). The ages and temperatures of fluorine fluid inclusions and barite deposits are indicated (Boiron et al, 2002;Fourcade et al, 2002;Munoz et al, 2005;Cathelineau et al, 2012). The mapping of the lower Jurassic evaporites is from (Curnelle and Dubois, 1986).…”

Section: Sedimentary Formations and Basement Of The Jardsur-mer Area mentioning

confidence: 99%

“…Fluid inclusion microthermometry, oxygen and carbon stable isotope analysis, and Sr analysis on the Aquitaine Basin edges have shown heterogeneous compositions and heterogeneous trapping temperatures of the fluids (see compilation in Fig. 1; Boiron et al, 2002;Fourcade et al, 2002;Cathelineau et al, 2012).…”

Section: Occurrence Of Mineralization In the Jard-sur-mer Area (Northmentioning

confidence: 99%

“…In France, MVT deposits of fluorite and/or barite are documented in the Paris Basin and the Aquitaine Basin (Boiron et al, 2002;Fourcade et al, 2002;Leach et al, 2006;Sizaret et al, 2009Sizaret et al, , 2004Cathelineau et al, 2012;Gigoux et al, 2015Gigoux et al, , 2016. In the Aquitaine Basin ( Fig.…”

Section: Introductionmentioning

confidence: 99%

“…1), most of the mineralization have been observed in the Hettangian units, which are considered as a high permeability layers and below the Toarcian (ca. 182-174 Ma) unit, which forms an impermeable barrier (Boiron et al, 2002;Fourcade et al, 2002;Cathelineau et al, 2012) (Fig. 2).…”

Section: Introductionmentioning

confidence: 99%

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Brittle tectonics and fluids overpressure during the early stage of the Bay of Biscay opening in the Jard-sur-Mer area, (northern Aquitaine Basin, France)

Strzerzynski¹,

Lenoir²,

Bessin³

et al. 2020

BSGF - Earth Sci. Bull.

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All around the Aquitain basin, fluid circulates at the interface between the basement and impermeable shale (Toarcian) within high porosity levels (Hettangian) as evidenced by many mineral deposits including baryte, fluorine and galena. On the Jard-sur-Mer area, these minerals are also found higher in the sedimentary series suggesting that fluid flow through the impermeable layer. Our field observations highlight that 1) fluid circulations are coeval with an episode of brittle deformation that is compatible with an upper-Jurassic N-S direction of extension, 2) fluid where over pressurized at the time of brittle deformation and 3) fluids overpressure resulted from the additional contribution of fluid from the basement ascending all along inherited brittle faults. When compared with the rest of the basin, these new constrains on the northern limit suggests that the Aquitain basin recorded several stages of fluid overpressure before and during the lower Cretaceous rifting phase and Pyrenees building up.

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Section: Sedimentary Formations and Basement Of The Jardsur-mer Area mentioning

confidence: 99%

Section: Occurrence Of Mineralization In the Jard-sur-mer Area (Northmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Brittle tectonics and fluids overpressure during the early stage of the Bay of Biscay opening in the Jard-sur-Mer area, (northern Aquitaine Basin, France)

Strzerzynski¹,

Lenoir²,

Bessin³

et al. 2020

BSGF - Earth Sci. Bull.

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“…The nature of the post-Variscan fluids in Europe, often associated with MVT mineralisation, has been intensely studied (Boni et al 2000a, b;Kappler and Zeeh 2000;Muchez et al 2000;Boiron et al 2002;Fourcade et al 2002;Gasparrini et al 2003Gasparrini et al , 2006. The origin of these fluids is mostly evaporated seawater that underwent intense water-rock interaction ).…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of highly saline fluids in siliciclastic sequences: genetic implications for post-Variscan fluid flow in the Moravosilesian Palaeozoic of the Czech Republic

Kučera

Muchez

Slobodník

et al. 2008

Int J Earth Sci (Geol Rundsch)

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Ubiquitous post-Variscan dolomites occur in Zn-Pb-Cu veins at the Nízký Jeseník Mountains and the Upper Silesian Basin (Lower and Upper Carboniferous siliciclastics at the eastern part of the Bohemian Massif).Crush-leach, stable isotope (oxygen and carbon) and microthermometry analysis of the fluid inclusions in dolomites enable understanding the geochemistry, origin and possible migration pathways of the fluids. Homogenisation temperatures of fluid inclusions range between 66 and 148°C, with generally higher temperatures in the Nízký Jeseník Mountains area than in the Upper Silesian Basin. The highest homogenisation temperatures (up to 148°C) have been found near major regional faults and the lowest in a distant position or at higher stratigraphic levels. Highly saline (16.6-28.4 eq. wt% NaCl) H 2 O-NaCl-CaCl 2 ± MgCl 2 fluids occur in inclusions. Na-Cl-Br systematics of trapped fluids and a calculated oxygen isotopic fluid composition between -0.9 and ?3.0% V-SMOW indicate that the fluid was derived from evaporated seawater. Stable isotopic modelling has been used to explain stable isotopic trends. Isotopic values (d 13 C = -6.0/?2.0% V-PDB, d 18 O = ?15.5/?22.5% V-SMOW of dolomites) resulted from fractionation and crystallisation within an open system at temperatures between 80 and 160°C. Rock-buffering explains the isotopic composition at low w/r ratios. Organic matter maturation caused the presence of isotopically light carbon in the fluids and fluid-rock interactions largely controlled the fluid chemistry (K, Li, Br and Na contents, K/Cl, I/Cl and Li/Cl molar ratios). The fluid chemistry reflects well the interaction between the fluid and underlying limestones as well as with clay-and organic-rich siliciclastics. No regional trends in temperature or fluid geochemistry favour a fluid migration model characterised by an important vertical upward migration along major faults. A permeable basement and fractured sedimentary sequence enhanced the general nature of the fluid system. Fluid characteristics are comparable with the main postVariscan fluid flow systems in the Polish (Cracow-Silesian ore district) and German sedimentary basins.

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Fluid Flows and Metal Deposition near Basement/Cover Unconformity: Lessons and Analogies from Pb–Zn–F–Ba Systems for the Understanding of Proterozoic U Deposits

Boiron

Cathelineau

Richard

2010

Frontiers in Geofluids

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Fluid transfers at the basement/cover interface

Cited by 21 publications

References 30 publications

Brittle tectonics and fluids overpressure during the early stage of the Bay of Biscay opening in the Jard-sur-Mer area, (northern Aquitaine Basin, France)

Brittle tectonics and fluids overpressure during the early stage of the Bay of Biscay opening in the Jard-sur-Mer area, (northern Aquitaine Basin, France)

Geochemistry of highly saline fluids in siliciclastic sequences: genetic implications for post-Variscan fluid flow in the Moravosilesian Palaeozoic of the Czech Republic

Fluid Flows and Metal Deposition near Basement/Cover Unconformity: Lessons and Analogies from Pb–Zn–F–Ba Systems for the Understanding of Proterozoic U Deposits

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