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Timing of veining and Variscan deformation in the Stavelot-Venn Massif (Belgium)

(2014) GEOLOGICA BELGICA. 17(3-4). p.244-251
Author
Organization
Abstract
Petrographic investigation of the Grand-Halleux boreholes identified different generations of quartz veins that were formed during different periods of fluid migration in an environment that was decreasingly influenced by compressive deformation. The Ar-40-Ar-39 dating of muscovite associated with shear zones crosscutting two quartz vein generations indicated an age of 318 +/- 4.7Ma, which allows determining the position of the different vein generations in relation to the Variscan deformation in the Stavelot-Venn Massif. This age also determines the approximate age for the Variscan syn-orogenic metamorphism in the Stavelot-Venn Massif. Younger extension veins and prismatic quartz crystals in open spaces are associated with different generations of carbonates, associated with Pb-Zn-Cu mineralisation. This implies that this mineralisation did not form during Caledonian metamorphism or early Variscan orogenic metamorphism, but has a late to post-Variscan age. It could be linked to the post-orogenic expulsion of metamorphic fluids, but a link with the younger Pb-Zn mineralisation in the Variscan front zone is favoured based on the presence of high-salinity low temperature fluids.
Keywords
Grand-Halleux, Ar-Ar age dating, Stavelot-Venn Massif, Pb-Zn-Cu mineralisation, paragenesis, CHAUDFONTAINE MINERALIZATION BELGIUM, ARDENNE SLATE BELT, EASTERN BELGIUM, THRUST FRONT, FLUID-FLOW, EUROPEAN VARISCIDES, METAMORPHIC FLUIDS, NORTHERN FRANCE, HIGH-SALINITY, EVOLUTION

Citation

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Chicago
Dewaele, Stijn, Ariël Boven, Tom Thys, and Philippe Muchez. 2014. “Timing of Veining and Variscan Deformation in the Stavelot-Venn Massif (Belgium).” Geologica Belgica 17 (3-4): 244–251.
APA
Dewaele, Stijn, Boven, A., Thys, T., & Muchez, P. (2014). Timing of veining and Variscan deformation in the Stavelot-Venn Massif (Belgium). GEOLOGICA BELGICA, 17(3-4), 244–251.
Vancouver
1.
Dewaele S, Boven A, Thys T, Muchez P. Timing of veining and Variscan deformation in the Stavelot-Venn Massif (Belgium). GEOLOGICA BELGICA. 2014;17(3-4):244–51.
MLA
Dewaele, Stijn, Ariël Boven, Tom Thys, et al. “Timing of Veining and Variscan Deformation in the Stavelot-Venn Massif (Belgium).” GEOLOGICA BELGICA 17.3-4 (2014): 244–251. Print.
@article{8550107,
  abstract     = {Petrographic investigation of the Grand-Halleux boreholes identified different generations of quartz veins that were formed during different periods of fluid migration in an environment that was decreasingly influenced by compressive deformation. The Ar-40-Ar-39 dating of muscovite associated with shear zones crosscutting two quartz vein generations indicated an age of 318 +/- 4.7Ma, which allows determining the position of the different vein generations in relation to the Variscan deformation in the Stavelot-Venn Massif. This age also determines the approximate age for the Variscan syn-orogenic metamorphism in the Stavelot-Venn Massif. Younger extension veins and prismatic quartz crystals in open spaces are associated with different generations of carbonates, associated with Pb-Zn-Cu mineralisation. This implies that this mineralisation did not form during Caledonian metamorphism or early Variscan orogenic metamorphism, but has a late to post-Variscan age. It could be linked to the post-orogenic expulsion of metamorphic fluids, but a link with the younger Pb-Zn mineralisation in the Variscan front zone is favoured based on the presence of high-salinity low temperature fluids.},
  author       = {Dewaele, Stijn and Boven, Ari{\"e}l and Thys, Tom and Muchez, Philippe},
  issn         = {1374-8505},
  journal      = {GEOLOGICA BELGICA},
  keyword      = {Grand-Halleux,Ar-Ar age dating,Stavelot-Venn Massif,Pb-Zn-Cu mineralisation,paragenesis,CHAUDFONTAINE MINERALIZATION BELGIUM,ARDENNE SLATE BELT,EASTERN BELGIUM,THRUST FRONT,FLUID-FLOW,EUROPEAN VARISCIDES,METAMORPHIC FLUIDS,NORTHERN FRANCE,HIGH-SALINITY,EVOLUTION},
  language     = {eng},
  number       = {3-4},
  pages        = {244--251},
  title        = {Timing of veining and Variscan deformation in the Stavelot-Venn Massif (Belgium)},
  volume       = {17},
  year         = {2014},
}

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