Evolution of Sedimentary Basins as Recorded in Silica Concretions: An Example from the Ionian Zone, Western Greece

نویسندگان

چکیده

Chert concretions in thick limestone successions preserve a more complete paragenetic sequence of diagenetic minerals than their host and interbedded shale. The goal this study was to test the possible presence high-temperature mineralising system Ionian basin western Greece. Upper Cretaceous chert nodules were sampled at Araxos, where rocks are highly faulted uplifted by salt diapirism, on Kastos Island, flanks regional anticline. have microporosity produced recrystallisation opal quartz fractures brittle during inversion. Diagenetic mineral textures interpreted from backscattered electron images, identified chemistry. pores veins include sedimentary apatite (francolite), dolomite, Fe-chlorite, Fe oxide-hydroxide mixtures, sphalerite, barite calcite. Sphalerite is restricted suggesting that inferred basinal fluids hotter saline Kastos. At also includes minor Cu, Zn, Ni. Whether transported metals derived sub-salt clastic basement, or enriched Mesozoic black shales, unclear. effectiveness novel approach understanding fluid flow history validated.

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ژورنال

عنوان ژورنال: Minerals

سال: 2021

ISSN: ['2075-163X']

DOI: https://doi.org/10.3390/min11070763