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Titolo:
PENECONTEMPORANEOUS DIAGENESIS IN CONTINENTAL SALINE SEDIMENTS - BLOEDITIZATION IN QUERO-PLAYA LAKE (LA-MANCHA, CENTRAL SPAIN)
Autore:
SANCHEZMORAL S; ORDONEZ S; DELCURA MAG; HOYOS M; CANAVERAS JC;
Indirizzi:
CSIC,MUSEO NACL CIENCIAS NAT,DPTO GEOL,JOSE GUTIERREZ ABASCAL 2 E-28006 MADRID SPAIN UNIV ALICANTE,DPTO CIENCIAS TIERRA & MEDIOAMBIENTE MADRID SPAIN CSIC,INST GEOL ECON MADRID SPAIN UNIV ALCALA DE HENARES,FAC CIENCIAS,DPTO GEOL MADRID SPAIN
Titolo Testata:
Chemical geology
fascicolo: 3-4, volume: 149, anno: 1998,
pagine: 189 - 207
SICI:
0009-2541(1998)149:3-4<189:PDICSS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRINE EVOLUTION; DOLOMITIZATION; THERMODYNAMICS; ELECTROLYTES; EVAPORITES; CHEMISTRY;
Keywords:
PLAYS LAKE; BLOEDITE; EARLY DIAGENESIS; EPSOMITE; SALT PRECIPITATION SEQUENCES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
S. Sanchezmoral et al., "PENECONTEMPORANEOUS DIAGENESIS IN CONTINENTAL SALINE SEDIMENTS - BLOEDITIZATION IN QUERO-PLAYA LAKE (LA-MANCHA, CENTRAL SPAIN)", Chemical geology, 149(3-4), 1998, pp. 189-207

Abstract

In most continental saline lakes of La Mancha (Central Spain) bloedite has been identified as a part of recent saline deposits. By means ofa monitoring of the natural evaporation process of the brines in the Quero playa lake has been observed, the absence of this mineral as a primary phase in the sequence of saline precipitation. However, bloedite appears as one of the major components of the saline deposit originated during the aforementioned evaporation period. The genesis of this bloedite is caused by a syndepositional diagenetic process we have called 'bloeditization'. This process in an early rapid diagenetic genesis of bloedite, as a result of the reaction between the previously precipitated epsomite and the concentrating brines. The replacement of theepsomite by bloedite, leads to the release of magnesium chloride and water into the brine. If we use a polythermal thermodynamic simulationof the studied evaporation process, we obtain results consistent withobservations of the brine precipitation paths and the mineralogical composition of the saline deposit. (C) 1998 Elsevier Science B.V. All rights reserved.

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Documento generato il 22/09/20 alle ore 02:15:33