气候变化领域集成服务门户(CCPortal): Evolution of the middle crust of the Pyrenees during the Paleozoic: new data on the plutonic rocks from the North Pyrenean Agly Massif

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DOI	10.1007/s00531-018-1652-4
	Evolution of the middle crust of the Pyrenees during the Paleozoic: new data on the plutonic rocks from the North Pyrenean Agly Massif
	Guille B.T.; Olivier P.; Paquette J.-L.; Bosse V.; Guillaume D.
发表日期	2019
ISSN	14373254
起始页码	245
结束页码	265
卷号	108 期号:1
英文摘要	The Variscan middle crust of the eastern Pyrenees is represented by the Bélesta and Caramany gneissic units of the North Pyrenean Agly Massif. In this study, we date and reinterpret the orthogneisses and granites composing these units. We characterize a recurrent plutonic activity spanning all the Paleozoic in this part of the Pyrenean crust. The Bélesta unit (amphibolite facies) is mainly composed of sills of (Latest Ediacaran)–Earliest Cambrian (542 ± 4 and 540 ± 4 Ma) orthogneisses (70% of the series), almost unknown in the Pyrenees until now, and Latest Carboniferous–(Earliest Permian) (307 ± 3–298 ± 3 Ma time span) granites (15% of the series). These plutonic rocks were emplaced in probably Ediacaran aluminous pelites later transformed into paragneisses (15% of the series). The Caramany unit (granulite facies) is mainly composed of Precambrian aluminous paragneisses migmatized during the Latest Carboniferous–(Earliest Permian) (299 ± 4 Ma), sills of Earliest Cambrian (529 ± 5 Ma) orthogneisses and sills (about 30% of the series) of Late Carboniferous (308 ± 3–299 ± 3 Ma) opx-bearing and opx-free granodiorites, grt-bearing leucogranites and norites. Among these last rocks, the Ansignan charnockite, forming a 800 m-thick laccolith near the base of the Caramany unit, and previously dated at 314 ± 6/7 Ma (Respaut, Lancelot, Neues Jahrbuch Miner Abh 147-1:21–34, 1983), is refined at 307 ± 3 Ma. Our results confirm the importance of the Late Carboniferous plutonism in deep levels of the Pyrenean crust, which largely resulted from recycling of older para- and orthoderived rocks of this crust. The emplacement of hundreds of metres in thickness of granites and other plutonic rocks in the Variscan Pyrenees occurred in a rather short time both as sills in these deep levels and as large plutons in shallower levels, a fact which necessarily had consequences on the HT–LP Carboniferous metamorphism. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Crust recycling; Earliest Cambrian; Ediacaran; Granite; Late Carboniferous; North Pyrenean Agly Massif; Orthogneiss; Partial melting; Variscan Pyrenees
语种	英语
scopus关键词	Cambrian; Carboniferous; crustal evolution; Ediacaran; emplacement; granite; orthogneiss; partial melting; plutonic rock; plutonism; Pyrenees
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147883
作者单位	iSTeP-UMR 7193, Université Pierre et Marie Curie-P6, 4 place Jussieu, Paris Cedex 05, 75252, France; Géosciences Environnement Toulouse (GET) and UMR 5563, Université de Toulouse, CNRS, IRD, OMP, 14 Avenue E. Belin, Toulouse, 31400, France; 54 Impasse de la Bergeronnette, L’union, 31240, France; Laboratoire Magmas et Volcans, Université Clermont Auvergne, CNRS, IRD, OPGC, Clermont-Ferrand, 63000, France; Université Lyon, UJM-Saint-Etienne, UCA, CNRS, IRD, LMV UMR 6524, Saint-Etienne, 42023, France
推荐引用方式 GB/T 7714	Guille B.T.,Olivier P.,Paquette J.-L.,et al. Evolution of the middle crust of the Pyrenees during the Paleozoic: new data on the plutonic rocks from the North Pyrenean Agly Massif[J],2019,108(1).
APA	Guille B.T.,Olivier P.,Paquette J.-L.,Bosse V.,&Guillaume D..(2019).Evolution of the middle crust of the Pyrenees during the Paleozoic: new data on the plutonic rocks from the North Pyrenean Agly Massif.International Journal of Earth Sciences,108(1).
MLA	Guille B.T.,et al."Evolution of the middle crust of the Pyrenees during the Paleozoic: new data on the plutonic rocks from the North Pyrenean Agly Massif".International Journal of Earth Sciences 108.1(2019).