意大利厄尔巴岛晚期侵入体的 U-Pb 和 40Ar/39Ar 耦合年代学支持中新世晚期第勒尼安海上地壳的长寿命岩浆储层

IF 2.2 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Terra Nova Pub Date : 2024-02-07 DOI:10.1111/ter.12706

F. Mazzarini, L. Bracciali, G. Musumeci, J. R. Wijbrans, K. Kuiper, M. S. A. Horstwood

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引用次数: 0

摘要

通过U-Pb锆石和40Ar/39Ar白云母测年耦合方法对中新世晚期的Monte Capanne和Porto Azzurro岩浆岩进行了研究，以检验上地壳是否存在长寿命岩浆系统。锆石在两个岩浆系统中的结晶时间均为 >1 Ma，超固结条件重叠的时间为 ~220 ka，表明这两个储层以前未被认识到是共存的。Porto Azzurro高T-奥陶系的发育被持续的火成岩锆石结晶所追溯，直至约6.0 Ma。通过将结晶与厄尔巴岛西部和东部晚期脉冲的位移后冷却联系起来，我们推测在〜8〜6Ma之间的第勒尼安海上地壳中存在长寿命的大型储层（可能是同一个储层）。

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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

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.

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来源期刊

Terra Nova 地学-地球科学综合

CiteScore

4.80

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Terra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences. Terra Nova encompasses geology, geophysics and geochemistry, and extends to the fluid envelopes (atmosphere, ocean, environment) whenever coupling with the Solid Earth is involved.