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Diagenesis of Late Miocene micritic lacustrine carbonates, Madrid Basin, Spain

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Wright, V.P. and Alonso-Zarza, Ana María and Sanz Montero, M. Esther and Calvo Sorando, José Pedro (1997) Diagenesis of Late Miocene micritic lacustrine carbonates, Madrid Basin, Spain. Sedimentary Geology, 114 . pp. 81-95. ISSN 0037-0738

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Official URL: http://www.journals.elsevier.com/sedimentary-geology



Abstract

Mud-grade lacustrine limestones of Miocene age from the Madrid Basin, Spain, reveal varied and complex diagenetic histories. Microporous micrites occur as well as micrites with anhedral mosaics. The micrites have recrystallized from a metastable precursor, in part under sub-oxic meteoric diagenetic conditions probably before extensive karstification in the Pliocene. The absence of aragonite relics, their mainly micritic microfabric, low Sr content and covariant trend of Sr and Mg suggest that the micrites formed from mainly high-magnesian calcite muds. Lacustrine micrites can be compared to marine forms and criteria used to assess the composition of the marine precursor muds can be applied to lacustrine limestones to complement other techniques to identify original lake water compositions.


Item Type:Article
Uncontrolled Keywords:Diagenesis; Lacustrine; Micrite; Microporosity; Miocene
Subjects:Sciences > Geology > Petrology
ID Code:25319
Deposited On:08 May 2014 09:58
Last Modified:07 Jun 2019 08:32

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