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Structure of a Variscan migmatite-granite transition zone (N Sardinia, Italy).
- Source :
- Journal of Maps; 2023, Vol. 19 Issue 1, p1-10, 10p
- Publication Year :
- 2023
-
Abstract
- This paper presents the structural map of the Barrabisa Complex, an E-W ribbon-like migmatitic massif exposed in the northern part of Sardinia. The migmatites consist of metatexites and diatexites with variable melt proportion, grading in the central part of the complex to a foliated peraluminous granodiorite. Xenotime/monazite dating indicates that the foliated granodiorite pluton emplaced in upper Carboniferous times (≈307–313 Ma) within a narrow E-W ductile top-to-the east shear zone cutting through a Variscan high-grade metamorphic basement composed of orthogneisses, metasedimentary-derived migmatites and subordinate amphibolites. Field geological mapping, coupled with structural and micro-structural analysis, allowed us to distinguish the granodioritic pluton and three metamorphic units characterized by variable melt to protholith ratio, that represent a continuous transition from metatexite to diatexite with high melt concentration, to foliated granodiorite. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17445647
- Volume :
- 19
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of Maps
- Publication Type :
- Academic Journal
- Accession number :
- 174959810
- Full Text :
- https://doi.org/10.1080/17445647.2023.2182721