Geology of late-Variscan Sàrrabus pluton (south-eastern Sardinia, Italy)

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....

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Bibliographic Details
Published in:Journal of maps 2021-12, Vol.17 (2), p.591-605
Main Authors: Secchi, F., Naitza, S., Oggiano, G., Cuccuru, S., Puccini, A., Conte, A. M., Giovanardi, T., Mazzucchelli, M.
Format: Article
Language:English
Subjects:
bimodal magmatism
Earth mantle
Gamma rays
gamma-ray logging
Geologic mapping
Geological mapping
Geological surveys
Geology
Granite
Late-Variscan magmatism
Mapping
Mineral deposits
Petrogenesis
Radiometric dating
Scientific imaging
Shear zone
Spectrometry
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Summary: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.
ISSN:1744-5647
1744-5647
DOI:10.1080/17445647.2021.1982032