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Authors: | Mazzarini, Francesco* Bracciali, L.* Musumeci, Giovanni* Wijbrans, J. R.* Kuiper, K.* Horstwood, M S A* |
Title: | Coupled U–Pb and 40Ar/39Ar chronology of late‐stage intrusions at Elba Island (Italy) supports late Miocene long‐lived magma reservoirs in the Tyrrhenian upper crust | Other Titles: | long-lived magma reservoirs in Tyrrhenian crust | Journal: | Terra Nova | Publisher: | Wiley | Issue Date: | 7-Feb-2024 | DOI: | 10.1111/ter.12706 | Keywords: | 40Ar/39Ar white mica dating Elba Island long-lived magma reservoirs U–Pb zircon dating MioceneTyrrhenian crust upper crustal granites |
Subject Classification: | 04. Solid Earth | Abstract: | The late Miocene Monte Capanne and Porto Azzurro plutons are investigated by means of coupled U-Pb zircon and 40Ar/39Ar white mica dating to test the occurrence of long-lived magmatic systems in the upper crust. Zircon crystallized for > 1 Myr in both plutonic systems, with supersolidus conditions overlapping for ~220 kyr indicating previously unrecognized co-existence of the two reservoirs. The development of the Porto Azzurro high T-aureole is post-dated by continuous igneous zircon crystallization until ~ 6.0 Ma. By linking crystallization to post-emplacement cooling of late-stage pulses in both western and eastern Elba we constrain long-lived sizeable reservoirs (possibly the same reservoir) in the Tyrrhenian upper crust between ~8 and 6 Ma. |
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accpted-TER-2023-0072R2_text.pdf | submitted final accepted manuscript | 298.54 kB | Adobe PDF | Embargoed until January 20, 2025 |
Terra Nova - 2024 - Mazzarini.pdf | Restricted Paper | 9.96 MB | Adobe PDF | View/Open |
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