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Sedimentación lacustre (Carbonatado-salina) en las facies autuniense de la Cordillera Ibérica

Arribas Mocoroa, José and Arribas Mocoroa, María Eugenia and Marfil, Rafaela and Peña, José Andrés de la (1983) Sedimentación lacustre (Carbonatado-salina) en las facies autuniense de la Cordillera Ibérica. In Comunicaciones presentadas en el X Congreso Nacional de Sedimentología / Congreso Nacional de Sedimentología (10. 1983. Menorca). Obrador, Menorca, pp. 73-84.

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Abstract

The aim of this paper is the better understanding of
the carbonate and evaporite sedimentation of the upper unit
of the Autunian facies in the "Sierra de Aragoncillo".
Also the diagenetic evolution of these sediments in
their reactions with the interbedded ryolitic-dacitic tuffs
and ashes, have reen studied.
The petrographic features of these carbonates are indicative
of an early process of dolomitization in a hypersaline environment. The source of magnesium could be the sorroun
ding volcanic rocks close to the lacustrine basin. Other common
diagenetic minerals are: Zeolites, K-feldspar, quartz and clay
minerals. The authigenesis of these minerals are reported to
be the result of the reaction of tuffaceous rocks with interstitial waters trapped during sedimentation in a saline-alkaline
lake.
Considering the above data, we can establish that the
lacustrine sedimentation at the end ofthe Autunian took place
in a closed basin with arid climate.

Item Type:Book Section
Uncontrolled Keywords:Facies autenienses; Sedimentología; Cordillera Ibérica
Subjects:Sciences > Geology > Petrology
ID Code:12876
Deposited On:27 Jun 2011 11:21
Last Modified:27 Jun 2011 11:21

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