Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Journal of StructuralGeology, Vol. 17, No. 3, pp. 357 to 369, 1995 Copyright 1995 Elsevier Science Ltd
 

Summary: ~ Pergamon
Journal of StructuralGeology, Vol. 17, No. 3, pp. 357 to 369, 1995
Copyright © 1995 Elsevier Science Ltd
Printed in Great Britain. All rights reserved
0191-8141/95 $9.50+0.00
0191-8141(94)00062-x
Cleavagedevelopmentwithina forelandfoldand thrustbelt, southern
Pyrenees, Spain
JAMES E. HOLL and DAVID J. ANASTASIO
Department of Earth and Environmental Sciences, 31 Williams Drive, Lehigh University, Bethlehem, PA
18015-3188, U.S.A.
(Received 13 July 1993; accepted in revised form 2 May 1994)
Abstract--In the southern Pyrenees lithologically distinct cleavage fronts are each parallel to bedding and dip
~20 ° towards the foreland. Pressure solution was the dominant mechanism of cleavage development. The
mudstone cleavage front is coincident with the - 195°C paleoisotherm and is associated with a pressure solution
strainof-5%, amechanicaltwinstrainof-4%, and adeviatoricstressmagnitudeof-65 MPa.Illiteerystallinity
measurements define a geothermal gradient of 15°Ckm-1 and indicate that the paleoisotherms are bedding-
parallel. Deviatoric stress magnitudes, from calcite twins, were regionallyconstant at -65 MPa and principal
stressaxeswere perpendicular to cleavage.Temperature was the primary control on deformation micromecha-
nismsand the positionandorientation ofthe cleavagefrontwithinthe forelandthrust wedge.Deformation below

  

Source: Anastasio, David - Department of Earth and Environmental Sciences, Lehigh University

 

Collections: Geosciences