RT Journal Article
T1 Diagenesis of Late Miocene micritic lacustrine carbonates,Madrid Basin, Spain
A1 Wright, V.P.
A1 Alonso-Zarza, Ana María
A1 Sanz Montero, M. Esther
A1 Calvo Sorando, José Pedro
AB 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.
PB Elsevier
SN 0037-0738
YR 1997
FD 1997
LK https://hdl.handle.net/20.500.14352/59035
UL https://hdl.handle.net/20.500.14352/59035
LA eng
DS Docta Complutense
RD 29 abr 2024