气候变化领域集成服务门户(CCPortal): Age of metamorphism and deformation in the Montagne Noire dome (French Massif Central): Tapping into the memory of fine-grained gneisses using monazite U-Th-Pb geochronology

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DOI	10.1016/j.tecto.2019.228316
	Age of metamorphism and deformation in the Montagne Noire dome (French Massif Central): Tapping into the memory of fine-grained gneisses using monazite U-Th-Pb geochronology
	Roger F.; Teyssier C.; Whitney D.L.; Respaut J.-P.; Paquette J.-L.; Rey P.F.
发表日期	2020
ISSN	00401951
卷号	776
英文摘要	Recent work has revealed that the Montagne Noire dome, located in the foreland of the Variscan belt (French Massif Central), contains a record of nearly coeval, late Variscan eclogitization and migmatization. Given these new results, it is important to understand the chronology of events that produced high-grade metamorphism and exhumation. Using U-Th-Pb dating of monazite, this study confirms ages of ~315–300 Ma for high-T metamorphism in the augen gneiss that makes up a large fraction of the Montagne Noire dome, and documents for the first time ~295 Ma monazite ages in compositionally varied fine-grained gneisses that form folded continuous layers within the core of the dome. The fine-grained gneiss layers are intensely sheared and are interpreted to have localized late, high-T deformation in the core of the dome. These sheared fine-grained gneisses form a network of shear zones that were kinematically linked to the extensional and strike-slip deformation zones that exhumed the Montagne Noire dome in a pull-apart (s.l.) domain. Continued deformation-recrystallization and fluid flow within these shear zones likely drove rejuvenation of monazite for ~5 million years after much of the melt had crystallized in the Montagne Noire dome. © 2020 Elsevier B.V.
关键词	Exhumation of partially molten crust Fine grained gneisses High-T deformation Migmatite dome Monazite U-Th-Pb dating Montagne Noire, France
英文关键词	Deformation; Flow of fluids; Geochronology; Lead alloys; Monazite; Phosphate minerals; Shear flow; Ternary alloys; Thorium alloys; Uranium alloys; Exhumation of partially molten crust; Fine grained; High-T; Migmatite; Montagne Noire, France; U-Th-Pb dating; Domes; crust; deformation; dome; exhumation; geochronology; gneiss; metamorphism; migmatite; monazite; Paleozoic; uranium series dating; France; Massif Central; Montagne Noire
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207866
作者单位	Laboratoire Géosciences Montpellier (CNRS-UMR 5243), Université Montpellier, Campus Triolet, Montpellier Cedex 5, 34095, France; Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN 55455, United States; Laboratoire Magmas et Volcans (CNRS-UMR 6524), Campus Universitaire des Cézeaux, Aubière Cedex, 63178, France; School of Geosciences, University of Sydney, Sydney, NSW 2006, Australia
推荐引用方式 GB/T 7714	Roger F.,Teyssier C.,Whitney D.L.,et al. Age of metamorphism and deformation in the Montagne Noire dome (French Massif Central): Tapping into the memory of fine-grained gneisses using monazite U-Th-Pb geochronology[J],2020,776.
APA	Roger F.,Teyssier C.,Whitney D.L.,Respaut J.-P.,Paquette J.-L.,&Rey P.F..(2020).Age of metamorphism and deformation in the Montagne Noire dome (French Massif Central): Tapping into the memory of fine-grained gneisses using monazite U-Th-Pb geochronology.Tectonophysics,776.
MLA	Roger F.,et al."Age of metamorphism and deformation in the Montagne Noire dome (French Massif Central): Tapping into the memory of fine-grained gneisses using monazite U-Th-Pb geochronology".Tectonophysics 776(2020).