Unmixing fluid histories in polymineralic fault rocks using isotopic evolution and the PolyFrac tool: a case study from Lemnos Island, Greece

Chemical Geology 2026 Open access

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Authors: Vincenzo Moretto, Luigi R. Berio, Luigi Dallai, Giulio Viola, Fabrizio Balsamo, Mattia Pizzati, Georg Grathoff, Laurence N. Warr, Ruikai Xie, Luca Aldega
DOI: 10.1016/j.chemgeo.2026.123345
Cited by: 2
References: 70

Abstract

This study investigates the evolution of the isotopic composition of fluids in equilibrium with polymineralic fault rocks from the Kornos-Aghios Ioannis and Partenomythos fault zones on Lemnos Island (North Aegean Sea, Greece). Using a multi-method approach by combining stable isotope analysis (δD, δ 18 O), K-Ar geochronology on fault rocks, and X-ray diffraction of distinct grain-size fractions (from 130 °C) in Aquitanian-Burdigalian times followed by subsequent re-equilibration at shallower crustal levels with meteoric waters (~60–65 °C). Authigenic illite-smectite in the

Fields of Study & Subjects

earthquake and tectonic studies Paleontology and Stratigraphy of Fossils Geology and Paleoclimatology Research

Publication details

Journal / source
Chemical Geology
Publisher
Elsevier BV
Volume
708
Pages
123345–123345
Publication date
4 March 2026
Language
EN