40Ar/39Ar dating of metamorphic soles from the Albanian ophiolites: implications for their emplacement models

被引：34

作者：

Vergely, P ^{[1
]}

Dimo, A

Monie, P

机构：

[1] Univ Paris Sud, EP Geophys & Geodynam Interne 1748, Lab Geol Dynam Terre & Planetes, F-91405 Orsay, France

[2] USTL, UMR 5567, Lab Geochronol Geochim & Petrol, F-34095 Montpellier, France

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES | 1998年 / 326卷 / 10期

关键词：

metamorphic soles; ophiolites; Albania; 40Ar/39Ar dating; Middle Jurassic;

D O I：

10.1016/S1251-8050(98)80183-3

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The metamorphic soles of the Albanian ophiolites, 0.5 km thick: highly deformed, show an inverted metamorphic gradient, formed during the early stages of intra-oceanic thrusting. Twenty-Sour 40Ar/39Ar radiometric ages were obtained on amphiboles and micas from the different soles and ophiolitic igneous genesis rocks. The main results are the Middle Jurassic age (160-174 Ma) of the the metamorphic soles, an important north-south diachronism (up to 14 Ma) over 150 km, and a synchronism between the metamorphism and the late magmatic events. The closure of the triangular oceanic basin, cut by ENE-WSW transform faults, can explain these results. (C) Academie des sciences / Elsevier; Paris.

引用

页码：717 / 722

页数：6

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