Differential denudations of the Argentera Alpine external crystalline massif (SE France) revealed by fission track thermochronology (zircons, apatites).

被引：53

作者：

Bigot-Cormier, F

Poupeau, G

Sosson, M

机构：

[1] Geosci Azur, CNRS, UMR 6526, F-06560 Valbonne, France

[2] Maison Geosci, F-38041 Grenoble 9, France

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES | 2000年 / 330卷 / 05期

关键词：

thermochronology; fission tracks; denudation; western Alps; Argentera-Mercantour; France;

D O I：

10.1016/S1251-8050(00)00127-0

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A fission track thermochronological study of the Argentera external crystalline massif (western Alps) reveals tectonic blocks with differential vertical motions. The northwest area cooled down about 300 degrees C from the Upper Cretaceous and the remaining of the massif crossed the 250 C isotherm in the 29-20 Ma rime interval, after the internal nappe overthrust. Moreover the massif cooled below 120 degrees C more than 12.5 Ma ago and its denudation rate increased locally 6 Ma ago and more generally since 3.5 Ma in relation with the reverse motion along the Bersezio Fault. (C) 2000 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.

引用

页码：363 / 370

页数：8