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Zasięg i budowle wulkaniczne grupy Andahua

Gałaś A.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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2008

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T. 34, z. 2/1

107-135

PL

W 2003, 2004 i 2006 roku grupa geologów z Akademii Górniczo-Hutniczej w Krakowie prowadziła badania terenowe młodej grupy wulkanicznej Andahua, w południowym Peru. Została ona poznana zaledwie 45 lat temu i do chwili obecnej nie określono definitywnie jej zasięgu i genezy. Największym obszarowo i jednocześnie najbogatszym w produkty wulkanizmu grupy Andahua jest rejon Doliny Wulkanów. Lawy zwartą pokrywą wypełniają tę dolinę, między Misahuanca a Ayo na długości około 60 km. W trakcie prac zidentyfikowano około 150 centrów erupcyjnych, w tym: stożki piroklastyczne o wysokości 50-300 m oraz bardziej liczne kopuły i szczeliny lawowe. Morfologia i rozprzestrzenienie skał grupy Andahua wykazują pewne związki z tektoniką i budową geologiczną podłoża.

EN

In 2003,2004 and 2006 small groups of geologists of AGH - The University of Science and Technology in Kraków investigated young Andahua volcanic group of Southern Peru. It was identified first some 45 years ago but its extension is not definitely determined yet. The greatest area of the Andahua group, where at the same time the volcanism products are the most common, is the Valley of Volcanoes. This valley, between the Misahuanca and Ayo, is covered by a dense cover of lava, which is about 60 km long. Field work resulted in discovery of about 150 individual emission centres: apparent pyroclastic cones 50-300 metres high, and usually smaller lava domes and vents controlled by fractures. Morphology of the Andahua lava flows coalescing into composite lava fields as well as criteria for their stratigraphy and tectonic controls are given.

2

Lava Flow Hazard Evaluation Through Cellular Automata and Genetic Algorithms : an Application to Mt Etna Volcano

Rongo R., Spataro W., D'Ambrosio D., Avolio M.V., Trunfio G.A., Di Gregorio S.

Fundamenta Informaticae

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2008

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Vol. 87, nr 2

247-267

EN

A hybrid technique based on Cellular Automata and Genetic Algorithms has been used for modeling lava flows on Mt Etna volcano (Italy). In particular, a Parallel Master-Slave Genetic Algorithm has been applied to evolve a two dimensional Cellular Automata model for "aa"-type lava flows, typical of the considered study area. Specifically, the 2001 Etnean Nicolosi case study has been considered for model calibration, while a subsequent validation phase has been performed by considering further events occurred in the same area. Results have confirmed both the goodness of the cellular automata simulation model and of the genetic algorithm employed for its calibration. An application concerning hazard evaluation has been subsequently performed on a vast area of the volcano, regarding different types of vulnerability assessments. Results have pointed out the validity of the methodology and its usefulness for Civil Defence purposes.

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Karłowate wulkany formacji Andahua w południowym Peru

Gałaś A., Paulo A.

Przegląd Geologiczny

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2005

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Vol. 53, nr 4

320--326

EN

In July 2003 and 2004 small groups of geologists of AGH — The University of Science and Technology in Kraków investigated recent Andahua volcanic formation of Southern Peru. It was identified first some 45 years ago but its extension is not definitely determined yet. Field work resulted in discovery of about 100 individual emission centres: apparent pyroclastic cones 50–300 metres high, and usually smaller lava domes and vents by controlled fractures. Morphology of the Andahua lava flows coalescing into composite lava fields as well as criteria for their stratigraphy and tectonic controls are given.