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The Layos Granite, Hercynian complex of Toledo (Spain); an example of parautochthonous restite-rich granite in a granulitic area
L. Barbero and C. Villaseca
The Layos Granite, Hercynian complex of Toledo (Spain); an example of parautochthonous restite-rich granite in a granulitic area (in The second Hutton symposium on the origin of granites and related rocks; proceedings, P. E. Brown (editor) and B. W. Chappell (editor))
Special Paper - Geological Society of America (1992) 272: 127-138
The Layos Granite, Hercynian complex of Toledo (Spain); an example of parautochthonous restite-rich granite in a granulitic area (in The second Hutton symposium on the origin of granites and related rocks; proceedings, P. E. Brown (editor) and B. W. Chappell (editor))
Special Paper - Geological Society of America (1992) 272: 127-138
Index Terms/Descriptors
- autochthons
- country rocks
- Europe
- genesis
- granites
- granulites
- Iberian Peninsula
- igneous rocks
- leucogranite
- magmas
- major elements
- melting
- metamorphic rocks
- metamorphism
- mineral composition
- Paleozoic
- peraluminous composition
- petrography
- plutonic rocks
- protoliths
- regional metamorphism
- Southern Europe
- Spain
- trace elements
- Variscan Orogeny
- viscosity
- restite
- Layos Granite
- Toldeo Complex
Latitude & Longitude
Abstract
The strongly peraluminous Layos granites are characterized by a high modal proportion of cordierite and other restitic minerals. The granites vary from quartz-rich tonalites to melamonzogranites. For the most mafic granites (SiO (sub 2) 61-63%), it is estimated that the trapped restite component must have been approx 65%. This implies high viscosity of the melt which together with the anhydrous assemblage of the Layos granites, indicates H (sub 2) O- undersaturated melting conditions. Under such conditions, the high viscosity magma (crystal-liquid mush) had a restricted movement capacity, leading to the development of parautochthonous plutonic bodies.
ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 272
Title: The Layos Granite, Hercynian complex of Toledo (Spain); an example of parautochthonous restite-rich granite in a granulitic area
Title: The second Hutton symposium on the origin of granites and related rocks; proceedings
Affiliation: Universidad Complutense Madrid, Departamento de Petrologia y Geoquimica,
Madrid,
Spain
Affiliation: University of St. Andrews, Department of Geology,
St. Andrews,
United Kingdom
Pages: 127-138
Published: 1992
Text Language: English
Publisher: Geological Society of America (GSA),
Boulder, CO,
United States
ISBN: 0-8137-2272-1
Meeting name: The second Hutton symposium on the Origin of granites and related rocks
Meeting location: Canberra,
AUS,
Australia
Meeting date: 19910923Sept. 23-28, 1991
References: 63
DOI:
10.1130/SPE272-p127
Accession Number: 1993-010065
Categories: Igneous and metamorphic petrology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Annotation: Originally publ. in Transact. R. Soc. Edinburgh, Earth Sci., Vol. 83, parts 1 and 2
Illustration Description: illus. incl. 3 tables, geol. sketch map
N36°00'00" - N43°45'00", W09°30'00" - E04°30'00"
Secondary Affiliation: Australian National University,
AUS,
Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
