Caracterización sedimentológica de la laguna de Urao (Andes de Mérida, Venezuela)

  1. P. Huerta 1
  2. O. Guerrero 2
  3. R. Cuevas 2
  4. I. Armenteros 1
  5. F.A. Audemard 3
  6. J. Paredes 2
  1. 1 Universidad de Salamanca
    info

    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

  2. 2 Universidad de Los Andes
    info

    Universidad de Los Andes

    Bogotá, Colombia

    ROR https://ror.org/02mhbdp94

  3. 3 Fundación Venezolana de Investigaciones Simológicas, FUNVISIS
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Zeitschrift:
Geotemas (Madrid)

ISSN: 1576-5172

Datum der Publikation: 2012

Titel der Ausgabe: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Nummer: 13

Seiten: 96-99

Art: Artikel

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Andere Publikationen in: Geotemas (Madrid)

Zusammenfassung

The Urao lake in the Venezuelan Andes is known by the precipitation of Na and Na-Ca carbonates (gaylussite and trona). This paper describes the recent sedimentology of the Urao lake. Sediment samples from the palustrine areas and six cores from the lake bottom have been collected. Four of the six cores extracted a record of at least 120 cm long of the sediment fill. One of them even recovered 212 cm of sediments. The X-Ray Difraction (XRD) analyses of the lake sediment reveal the dominant siliciclastic composition (quartz, moscovite, clorite). Calcite and analcime are the main authigenic minerals precipitated in the lake. There are no evidences in the recent record (212 cm) of the gaylussite and trona reported in this lake. Two levels containing paleoseismites at 40-60 cm and 100-120 cm have been identified.

Fuente de los datos: Dialnet