期刊
JOURNAL OF MAPS
卷 11, 期 1, 页码 157-167出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17445647.2014.959568
关键词
Ligurian Alps; Brianconnais; structural map; sheath folds; geological mapping
资金
- CARG - Regione Liguria Project, University of Pavia
This study presents a geometric and structural analysis of curvilinear sheath folds exposed in blueschist rocks of the Ligurian Alps. Field data are presented in a geological map of the structural synthesis with related geological sections (at the 1: 10,000 scale) that illustrate the relationships and evolution of large-scale, sheath folds within metamorphic rocks. We based our analyses on the geometric parameters of more than 40 minor folds, as shape (hinge-Lm1 angle, main axial plane/S1 angle, interlimb angle and hinge curvature), asymmetry, fold hinge/stretching lineation obliquity and structural facing pattern. The summary of the whole data depicts a coherent 3D structure showing several orders of minor folds. Sense of asymmetry of minor folds and stratigraphic order has been used to reconstruct a reliable large-scale structure, and to define the sheath fold shape.
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