Fluid flow, alteration and mineralisation associated with the emplacement of the Lycian nappes (SW Turkey).

Journal article


Publication Details

Author(s): Joachimski M
Journal: Journal of Geochemical Exploration
Publisher: Elsevier
Publication year: 2003
Journal issue: 78-79
Pages range: 99-103
ISSN: 0375-6742


Abstract


Associated with the emplacement of the Lycian nappes, SW Turkey, Cretaceous limestones were thrusted over an ophiolitic mélange in their front zone. Miocene flysch formed immediately in front of these nappes and were overthrusted by the Lycian nappes. Petrographic and stable isotope evidence demonstrates that fluid circulation in the allochthonous limestones was rock-buffered and restricted. The thrust contact between the ophiolitic mélange and the overlying limestones is characterised by an alteration with hematitisation, dolomitisation, silicification and intense calcite veining. Although this alteration indicates an upward fluid flux from the ophiolitic mélange, the stable isotopic composition of the calcite veins in the altered zone does not reflect a major migration across the thrust fault. In contrast, extensive ferroan calcite veins developed in the flysch deposits as the result of the expulsion of seawater trapped in the pores during thrusting and/or sedimentation. © 2003 Elsevier Science B.V. All rights reserved.



FAU Authors / FAU Editors

Joachimski, Michael Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)

Last updated on 2018-09-08 at 10:23