气候变化领域集成服务门户(CCPortal): Variscan eclogites from the Argentera–Mercantour Massif (External Crystalline Massifs; SW Alps): a dismembered cryptic suture zone

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DOI	10.1007/s00531-020-01848-2
	Variscan eclogites from the Argentera–Mercantour Massif (External Crystalline Massifs; SW Alps): a dismembered cryptic suture zone
	Jouffray F.; Spalla M.I.; Lardeaux J.M.; Filippi M.; Rebay G.; Corsini M.; Zanoni D.; Zucali M.; Gosso G.
发表日期	2020
ISSN	14373254
起始页码	1273
结束页码	1294
卷号	109 期号:4
英文摘要	We document structural, geochemical, petrological and 40Ar/39Ar geochronological data performed on Variscan eclogites from the Argentera–Mercantour Massif, southwestern Alps. Based on the high-resolution field mapping, we present new eclogite occurrences and discuss the relationships between eclogites and surrounding migmatites. We recognized for the first time preserved eclogite facies assemblages. Trace elements and REE patterns establish that eclogites protoliths are MORBs contaminated by continental crust. Standard thermobarometry and thermodynamic modeling are consistent with P–T values of 640–740 °C for 1.5 ± 0.25 GPa, coherent with paleo-geotherms predicted for warm subduction of oceanic crust. We interpret these eclogites as a dismembered cryptic suture zone. 40Ar/39Ar dating on amphiboles yields an age of 339.7 ± 12 Ma for eclogite retrogression under amphibolite facies conditions. All these data are combined to link the Argentera–Mercantour Massif in the tectonic framework of both pre-Mesozoic Alpine basement and European southern Variscides. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	40Ar/39Ar dating; Argentera–Mercantour; Metamorphic evolution; Protoliths geochemistry; Southwestern alps; Variscan eclogites
语种	英语
scopus关键词	amphibolite facies; argon-argon dating; eclogite; geochronology; Hercynian orogeny; migmatite; petrology; rare earth element; suture zone; trace element; Argentera Massif
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/147675
作者单位	Université Côte d’Azur, Observatoire Côte d’Azur, Geoazur, 250 Rue A. Einstein, Sophia-Antipolis, Valbonne 06560, France; Dipartimento di Scienze della Terra ‘‘A. Desio”, Università degli Studi di Milano, via Mangiagalli 34, Milan, 20133, Italy; Center for Lithospheric Research, Czech Geological Survey, Prague 1, 11821, Czech Republic; Dipartimento Di Scienze Della Terra E Dell’Ambiente, Università degli Studi di Pavia, Pavia, Italy
推荐引用方式 GB/T 7714	Jouffray F.,Spalla M.I.,Lardeaux J.M.,等. Variscan eclogites from the Argentera–Mercantour Massif (External Crystalline Massifs; SW Alps): a dismembered cryptic suture zone[J],2020,109(4).
APA	Jouffray F..,Spalla M.I..,Lardeaux J.M..,Filippi M..,Rebay G..,...&Gosso G..(2020).Variscan eclogites from the Argentera–Mercantour Massif (External Crystalline Massifs; SW Alps): a dismembered cryptic suture zone.International Journal of Earth Sciences,109(4).
MLA	Jouffray F.,et al."Variscan eclogites from the Argentera–Mercantour Massif (External Crystalline Massifs; SW Alps): a dismembered cryptic suture zone".International Journal of Earth Sciences 109.4(2020).