Strain partitioning in a pluton during emplacement in transpressional regime: the example of the Neouvielle granite (Pyrenees)

被引:44
|
作者
Gleizes, G [1 ]
Leblanc, D [1 ]
Olivier, P [1 ]
Bouchez, JL [1 ]
机构
[1] Univ Toulouse 3, Lab Petrophys Tecton & Geomorphol, UMR 5563 CNRS, F-31400 Toulouse, France
关键词
anisotropy of magnetic susceptibility; granite; strain partitioning; Pyrenees; transpression;
D O I
10.1007/s005310000144
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
This microstructural and anisotropy of magnetic susceptibility study of the internal structures of the Hercynian Neouvielle granite pluton (100 km(2)) provides new data indicating that the pluton was emplaced during the main Hercynian tectonic event recognized in the Pyrenees. It also provides new data about the later Alpine deformation localized along narrow mylonitic bands. These bands acted as reverse faults and have not rotated the Hercynian structures that define the main part of the pluton. The pluton is composed of two structural domains: the northern half of the pluton displays a beak shape in map view, with subhorizontal E-W trending lineations of magmatic origin; the southern half is semi-circular and displays rather steeply northward plunging lineations corresponding to magmatic and high temperature (HT) solid-state microstructures. These features are associated with magma deformation during emplacement. Magma deformation corresponds, in the northern half of the pluton, to an E-W strike-slip deformation recognized in the enveloping pelitic metasediments of Carboniferous age and, in the southern half of the pluton, to southward overthrusting recognized :in the enveloping quartzites of Devonian age. Juxtaposition in a single granite body of transcurrent and compressive domains is viewed as a strain partitioning in the magma. This strain partitioning is linked to both the transpressive character of the main regional deformation event and the theological contrast between the pelitic country rocks and quartzose country rocks.
引用
收藏
页码:325 / 340
页数:16
相关论文
共 25 条
  • [1] Strain partitioning in a pluton during emplacement in transpressional regime: the example of the Néouvielle granite (Pyrenees)
    G. Gleizes
    D. Leblanc
    P. Olivier
    J. Bouchez
    [J]. International Journal of Earth Sciences, 2001, 90 : 325 - 340
  • [2] THE BASSIES GRANITE PLUTON (PYRENEES) - ZONING, STRUCTURE AND MODE OF EMPLACEMENT
    GLEIZES, G
    LEBLANC, D
    BOUCHEZ, JL
    [J]. COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II, 1991, 312 (07): : 755 - 762
  • [3] The Variscan Millares granite (central Pyrenees):: Pluton emplacement in a T fracture of a dextral shear zone
    Roman-Berdiel, Teresa
    Casas, Antonio M.
    Oliva-Urcia, Belen
    Pueyo, Emilio L.
    Liesa, Carlos
    Soto, Ruth
    [J]. GEODINAMICA ACTA, 2006, 19 (3-4) : 197 - 211
  • [4] Granite emplacement during tectonic exhumation: The Adirondack example
    Selleck, BW
    McLelland, JM
    Bickford, ME
    [J]. GEOLOGY, 2005, 33 (10) : 781 - 784
  • [5] Transpressional granite-emplacement model: Structural and magnetic study of the Pan-African Bandja granitic pluton (West Cameroon)
    Sandjo, A. F. Yakeu
    Njanko, T.
    Njonfang, E.
    Errami, E.
    Rochette, P.
    Fozing, E.
    [J]. JOURNAL OF EARTH SYSTEM SCIENCE, 2016, 125 (01) : 179 - 202
  • [6] MICROSTRUCTURE AND MAGNETIC-SUSCEPTIBILITY APPLIED TO EMPLACEMENT KINEMATICS OF GRANITES - THE EXAMPLE OF THE FOIX PLUTON (FRENCH PYRENEES)
    BOUCHEZ, JL
    GLEIZES, G
    DJOUADI, T
    ROCHETTE, P
    [J]. TECTONOPHYSICS, 1990, 184 (02) : 157 - 171
  • [7] Transpressional granite-emplacement model: Structural and magnetic study of the Pan-African Bandja granitic pluton (West Cameroon)
    A F Yakeu Sandjo
    T Njanko
    E Njonfang
    E Errami
    P Rochette
    E Fozing
    [J]. Journal of Earth System Science, 2016, 125 : 179 - 202
  • [8] Deformation partitioning during transpressional emplacement of a 'mantle extrusion wedge': the Ronda peridotites, western Betic Cordillera, Spain
    Mazzoli, S.
    Martin Algarra, A.
    [J]. JOURNAL OF THE GEOLOGICAL SOCIETY, 2011, 168 (02) : 373 - 382
  • [9] Pluton emplacement in a releasing bend in a transpressive regime: the arrozal granite in the Paraiba do Sul shear belt, Rio de Janeiro
    Nummer, Alexis R.
    Machado, Romulo
    Dehler, Nolan M.
    [J]. ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS, 2007, 79 (02): : 299 - 305
  • [10] Emplacement of the Aya Variscan granitic pluton (Basque Pyrenees) in a dextral transcurrent regime inferred from a combined magneto-structural and gravimetric study
    Olivier, P
    Améglio, L
    Richen, H
    Vadeboin, F
    [J]. JOURNAL OF THE GEOLOGICAL SOCIETY, 1999, 156 : 991 - 1002