Metallogenesis of the French part of the Variscan orogen. Part II: Time-space relationships between U, Au and SnW ore deposition and geodynamic events — mineralogical and UPb data

Cathelineau, ‪Michel; Boiron, M.C.; Holliger, P.; Poty, B.

doi:10.1016/0040-1951(90)90274-c

Cited by 67 publications

(57 citation statements)

References 42 publications

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“…285 Ma and ca. 275 Ma obtained for the uranium mineralizing events in the Guérande district (Métairie-Neuve and Pen Ar Ran deposits) are comparable with those obtained by Cathelineau et al (1990) in other vein type deposits from the Mortagne district in the South Armorican Massif (Fig. 1) and French Massif Central with a major stage of U mineralization…”

supporting

confidence: 85%

“…Ballouard et al (2015) and reference therein for the Armorican Massif, Couzinié et al (2014), Laurent et al (2015), Roger et al (2015) for the French Massif Central, Schaltegger (2000) for the Black Forest, Finger et al (1997), Breiter et al (2012) for the Bohemian Massif. The ages of U mineralization are from (a) this study, (b) Cathelineau et al (1990), (c) Hofmann and Eikenberg (1991), (d) Eikenberg (1988) (e) Wendt et al (1979), (f) Dill (2015) and reference A C C E P T E D M A N U S C R I P T …”

Section: Accepted M Manuscriptmentioning

confidence: 97%

“…mineralizing fluid was trapped at a temperature between 340 and 380°C and a low pressure; this temperature is anomalously high when compared to other U deposits in the EHB (150-250°C, Cathelineau et al, 1990).…”

Section: Accepted Manuscriptmentioning

confidence: 97%

“…Wendt et al, 1979;Carl et al, 1983;Eikenberg, 1988;Cathelineau et al, 1990;Hofmann and Eikenberg, 1991;Kříbek et al, 2009;Velichkin and Vlasov, 2011 and references therein). Regarding the genesis of these deposits, Turpin et al (1990) proposed that in the Massif Central, the U deposition resulted from the mixing of two types of fluids: an oxidizing surface-derived aqueous fluid able to leach U from uranium oxides in the leucogranites and a reduced fluid with an inferred sedimentary origin.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Uranium represents the most important resource in the region and has been mined within the three uraniferous districts of Pontivy, Mortagne and Guérande up until the end of the 90's (Cathelineau et al, 1990;Cuney et al, 1990) (Fig. 1).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

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Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France)

Ballouard

Poujol

Boulvais

et al. 2017

Ore Geology Reviews

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT Abstract:Most of the hydrothermal uranium (U) deposits from the European Hercynian belt (EHB) are spatially associated with Carboniferous peraluminous leucogranites. In the southern part of the Armorican Massif (French part of the EHB), the Guérande peraluminous leucogranite was emplaced in an extensional deformation zone at ca. 310 Ma and is spatially associated with several U deposits and occurrences. The apical zone of the intrusion is structurally located below the Pen Ar Ran U deposit, a perigranitic vein-type deposit where mineralization occurs at the contact between black shales and Ordovician acid metavolcanics. In the Métairie-Neuve intragranitic deposit, uranium oxide-quartz veins crosscut the granite and a metasedimentary enclave. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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supporting

confidence: 85%

Section: Accepted M Manuscriptmentioning

confidence: 97%

Section: Accepted Manuscriptmentioning

confidence: 97%

Section: Accepted M Manuscriptmentioning

confidence: 99%

Section: Accepted M Manuscriptmentioning

confidence: 99%

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Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France)

Ballouard

Poujol

Boulvais

et al. 2017

Ore Geology Reviews

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Basement shear zones development and shortening kinematics in the Ecrins Massif, Western Alps

et al. 2014

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In the Western Alps, Oligocene shortening affected a highly heterogeneous European crust with Liassic half-grabens inherited from the rifting stage and the finite deformation was strongly partitioned between the rigid basement and the weak Jurassic sediments. In the Ecrins Massif (Oisans, external crystalline massifs), where the half-grabens are best exposed and preserved, compressional structures within the basement have to date never been described in details. This massif was shortened under moderate metamorphic conditions (250-350°C and 0.1-0.5 GPa), and the rheological contrast between the basement and the cover is strong. While the sediments are intensely folded, the cover-basement interface presents apparent open folds underlined by the Lower Triassic layers. The basement itself shows a more localized deformation along several brittle-ductile shear zones. We here report new evidences of such brittle-ductile shear zones characterized by anastomosed phyllonitic shear bands rich in phengite and quartz, a low-strength material where strain has localized. New detailed maps of reverse shear zones, faults, schistosity, and stretching lineations in both the cover and the basement are provided. We show that the Oligocene crustal shortening was mainly E-W to ENE-WSW. Local N-S to NW-SE shortening occurred and was limited to the eastern border of the Ecrins Massif, around the Penninic Frontal Thrust, which likely was a sinistral transpressive structure in this area. Finally, new balanced cross sections show that these basement shear zones have accommodated more than 50% of the Oligocene crustal shortening.

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Mass bias corrections for U‐Pb isotopic analysis by secondary ion mass spectrometry: Implications for U‐Pb dating of uraninite

Sharpe

Fayek

2016

Rapid Comm Mass Spectrometry

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Metallogenesis of the French part of the Variscan orogen. Part II: Time-space relationships between U, Au and SnW ore deposition and geodynamic events — mineralogical and UPb data

Cited by 67 publications

References 42 publications

Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France)

Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France)

Basement shear zones development and shortening kinematics in the Ecrins Massif, Western Alps

Mass bias corrections for U‐Pb isotopic analysis by secondary ion mass spectrometry: Implications for U‐Pb dating of uraninite

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