Podrobnosti záznamu

    The volcano-tectonic evolution of the Miocene Santa Lucía Volcano, Boaco district, Nicaragua
    Buriánek, David
    Hradecký, Petr
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Journal of Geosciences
    Roč. 56, č. 2011
Výraz tezauru
    caldera, volcanostratigraphy, ignimbrite, Santa Lucía Volcano, Nicaraguan Interior Highlands
Klíčové slovo
Abstrakt (anglicky)
   On the basis of field mapping, petrological and geochemical data, a new model for the evolution of the Santa Lucía Volcano is presented. The first stage consisted of a series of strong Sub-Plinian eruptions, which produced thick ignimbrite units. These events destroyed the pre-existing volcanic edifice. The second stage was dominated by large explosive eruptions producing mainly non-welded dacitic-andesitic ignimbrites. The next resulted in the formation of andesitic lava flows and minor tephra fall-out deposits, covered by voluminous basaltic lavas. Lahars probably triggered by volcanic and/or seismic events represent the final stage of volcanic activity. From the Miocene onwards, volcanic rocks became deeply weathered and locally eroded. Strongly weathered rocks are susceptible to landslides, and surficial modification by post-volcanic slope movements is observed on the slopes of the Santa Lucía Volcano.
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
Datum importu
    15. 10. 2014