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.

Autor:	Mazzarini, F., Bracciali, L., Musumeci, G., Wijbrans, J. R., Kuiper, K., Horstwood, M. S. A.
Předmět:	MUSCOVITE MIOCENE Epoch MAGMAS ISLANDS ZIRCON IGNEOUS intrusions
Zdroj:	Terra Nova; Aug2024, Vol. 36 Issue 4, p258-265, 8p
Abstrakt:	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 Ma in both plutonic systems, with supersolidus conditions overlapping for ~220 ka 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. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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