Syntectonic anatexis and magmatism in a mid-crustal transpressional shear zone; an example from the Hercynian rocks of the eastern Pyrenees

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doi: 10.1016/S0191-8141(98)00017-0
Authors:Druguet, E.; Hutton, D. H. W.
Author Affiliations:Primary:
Universitat Autónoma de Barcelona, Departament de Geologia, Barcelona, Spain
University of Birmingham, United Kingdom
Volume Title:Journal of Structural Geology
Source:Journal of Structural Geology, 20(7), p.905-916. Publisher: Pergamon, Oxford-New York, International. ISSN: 0191-8141
Publication Date:1998
Note:In English. 55 refs.; illus., incl. block diag., geol. sketch maps
Summary:Contemporaneous Hercynian metamorphism and magmatism, and non-coaxial deformation, occurring within a transpressive regime, formed the migmatite complex on the N coast of the Cap de Creus peninsula (E Pyrenees). The complex comprises partially melted sillimanite schists, and two different suites of igneous rocks; a calc-alkaline magmatic sequence, consisting of small granitic bodies, and later peraluminous leucogranites and pegmatites. All these rocks occur within a sub-vertical high-strain zone, where a first schistosity is tightly folded and transposed. Relationships between deformational fabrics in the granites and migmatites, and folds and crenulation cleavage in the metasediments, indicate that deformational processes, magmatism and migmatization were penecontemporaneous. Analysis of cross-cutting relationships, and the different degrees of deformation, of the studied granitic rocks, verifies that the magmatism occurred as synkinematic consecutive intrusions, from earliest basic magmas to latest peraluminous acid dykes. [J.F.]
Subjects:Anatexis; Deformation; Dikes; Faults; Foliation; Granites; Igneous rocks; Inclusions; Intrusions; Leucogranite; Lineation; Lithostratigraphy; Magmatism; Metagraywacke; Metamorphic rocks; Metamorphism; Metasedimentary rocks; Migmatization; Orogeny; Pegmatite; Petrofabrics; Plutonic rocks; Schistosity; Schists; Shear zones; Slip cleavage; Strain; Structural analysis; Style; Three-dimensional models; Transpression; Variscan Orogeny; Xenoliths; Europe; Iberian Peninsula; Pyrenees; Southern Europe; Spain; Cap de Creus Peninsula; Eastern Pyrenees; Punta dels Farallons
Coordinates:N420000 N420000 E0040000 E0040000
Abstract Numbers:99M/796
Record ID:1998054458
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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