Tectono-metamorphic evolution of the European continental margin involved in the Alpine subduction: New insights from Alpine Corsica, France

IF 2 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Comptes Rendus Geoscience Pub Date : 2019-06-01 DOI:10.1016/j.crte.2018.12.002
Maria Di Rosa , Chiara Frassi , Francesca Meneghini , Michele Marroni , Luca Pandolfi , Alberto De Giorgi
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引用次数: 10

Abstract

In Corsica, continental units (the Lower Units) affected by high-pressure metamorphism represent the remains of the European margin deformed during the Alpine orogeny. In order to document how Alpine deformation and metamorphism changed along the European margin involved in the Alpine subduction, we selected three key areas: the Corte, Cima Pedani, and Ghisoni transects. The three transects show a broadly similar lithostratigraphy. They are characterized by a Variscan basement intruded by Permo-Carboniferous metagranitoids, and by a sedimentary cover including Mesozoic carbonates and middle to late Eocene breccias and sandstones. The three transects recorded a similar deformation history with three deformation phases. Thermo-baric estimations, instead, reveal that each unit was exhumed along an independent retrograde path within the orogenic Alpine wedge. In particular, the lowest units of the Lower Units stack were exhumed along an isothermal path, whereas those located at upper structural levels experienced progressive heating.

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参与阿尔卑斯俯冲的欧洲大陆边缘构造变质演化:来自法国阿尔卑斯科西嘉的新见解
在科西嘉,受高压变质作用影响的大陆单元(下单元)代表了阿尔卑斯造山运动期间变形的欧洲边缘的遗迹。为了记录阿尔卑斯俯冲过程中阿尔卑斯变形和变质作用是如何沿着欧洲边缘变化的,我们选择了三个关键区域:Corte、Cima Pedani和Ghisoni样带。这三个样条显示出大致相似的岩石地层。以二叠-石炭系偏花岗岩侵入的Variscan基底为特征,以中生代碳酸盐岩和中-晚始新世角砾岩、砂岩为沉积盖层。三个样带记录了相似的变形历史,分为三个变形阶段。相反,热压估算显示,每个单元都是沿着造山带内的一条独立的逆行路径被挖掘出来的。特别是,低单元堆栈的最低单元是沿着等温路径挖掘的,而位于上部构造水平的单元则经历了渐进加热。
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来源期刊
Comptes Rendus Geoscience
Comptes Rendus Geoscience 地学-地球科学综合
CiteScore
2.80
自引率
14.30%
发文量
68
审稿时长
5.9 weeks
期刊介绍: Created in 1835 by physicist François Arago, then Permanent Secretary, the journal Comptes Rendus de l''Académie des sciences allows researchers to quickly make their work known to the international scientific community. It is divided into seven titles covering the range of scientific research fields: Mathematics, Mechanics, Chemistry, Biology, Geoscience, Physics and Palevol. Each series is led by an editor-in-chief assisted by an editorial committee. Submitted articles are reviewed by two scientists with recognized competence in the field concerned. They can be notes, announcing significant new results, as well as review articles, allowing for a fine-tuning, or even proceedings of symposia and other thematic issues, under the direction of invited editors, French or foreign.
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