University of Cagliari
open
Geology of late-Variscan Sàrrabus pluton (south- eastern Sardinia, Italy)
S. Naitza
Second
;
2021-01-01
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.
Files in This Item:
| File | Size | Format | |
|---|---|---|---|
| SECCHI ET AL 2021 JOM.pdf open access
Description: articolo principale
Type: versione editoriale
Size 6.16 MB
Format Adobe PDF
|
6.16 MB | Adobe PDF | View/Open |
| SECCHI ET AL 2021 JOM MAP-compresso.pdf open access
Description: Carta geologica
Type: altro documento allegato
Size 2.59 MB
Format Adobe PDF
|
2.59 MB | Adobe PDF | View/Open |
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