1. Geology of late-Variscan Sàrrabus pluton (south-eastern Sardinia, Italy)
- Author
-
F. Secchi, S. Naitza, G. Oggiano, S. Cuccuru, A. Puccini, A. M. Conte, T. Giovanardi, and M. Mazzucchelli
- Subjects
late-variscan magmatism ,gamma-ray logging ,shear zone ,bimodal magmatism ,Maps ,G3180-9980 - Abstract
This paper deals with the geological mapping of the late-Variscan Sàrrabus pluton, (south-eastern Sardinia), a shallow multiple and composite igneous complex dominated by several generations of granodiorites, metaluminous and peraluminous granites and repeated pulses of mantle-derived mafic magmas. The map has been compiled based on geological surveys at 1:10,000 and 1:5,000 scales, assisted by in situ gamma-ray spectrometry and detailed petrographic investigations. Granite-related ore deposits have been also reported. The emplacement age of the pluton can be constrained by U/Pb dating on zircons of Cala Regina granodiorite, yielding an age of 286 ± 9 Ma. The resulting scenario documents a bimodal magmatism controlled by an EW trending shear zone, followed by the shallower emplacement of several pulses of independent granite magmas.
- Published
- 2021
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