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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.
- Source :
- Terra Nova; Aug2024, Vol. 36 Issue 4, p258-265, 8p
- Publication Year :
- 2024
-
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 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]
- Subjects :
- MUSCOVITE
MIOCENE Epoch
MAGMAS
ISLANDS
ZIRCON
IGNEOUS intrusions
Subjects
Details
- Language :
- English
- ISSN :
- 09544879
- Volume :
- 36
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Terra Nova
- Publication Type :
- Academic Journal
- Accession number :
- 178427869
- Full Text :
- https://doi.org/10.1111/ter.12706