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Evidence of multiple evaporite recycling processes in a salt-tectonic context, Sivas Basin, Turkey (2017)

Alexandre Pichat, Guilhem Hoareau, Jean-Paul Callot, Etienne Legeay, Kaan Sevki Kavak, Sidonie Révillon, Corinne Parat, Jean-Claude Ringenbach

Wiley

In: Terra Nova

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Publikationsdatum: 2017-10-18

Beschreibung: The isotopic composition of evaporites can shed light on their environment of precipitation and their subsequent recycling processes. In this study, we performed Sr, O and S isotopic analyses on evaporitic sulphates in the halokinetic Sivas Basin. The main objectives were to decipher the age and origin of the evaporites responsible for the salt tectonics, and to test whether diapir dissolution acts as the source of younger evaporitic layers in continental mini-basins. The Sr isotopes demonstrate that the first evaporites precipitated from seawater during the Middle–Late Eocene. The similar isotopic values measured in the halokinetic domain confirm that the Eocene evaporites triggered the salt tectonics and were continuously recycled in Oligo-Miocene mini-basins as lacustrine to sabkha evaporites. Modern halite precipitates suggest that the dissolution and recycling of diapiric halite is ongoing. This study demonstrates the efficiency of isotopic analyses in constraining evaporite recycling processes in continental halokinetic domains. This article is protected by copyright. All rights reserved.

Print ISSN: 0954-4879

Digitale ISSN: 1365-3121

Thema: Geologie und Paläontologie

Publiziert von Wiley

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