By Teresa Scolamacchia, José Luis Macías
This booklet summarizes the stories performed at of the main energetic volcanoes of Chiapas (Mexico): El Chichón and Tacaná. El Chichón erupted explosively in 1982 killing greater than 2000 humans being the worst volcanic catastrophe in Mexico, and Tacaná produced light phreatic explosions in 1950 and 1986. in simple terms after those explosions a surge of recent reports started to unreveal their volcanic background and effect.
This e-book offers the state-of-the-art advances in themes on the topic of the geologic environment of the 2 volcanoes, their eruptive background and composition of erupted items, the hydrothermal platforms and their manifestations. Volcanic risks and dangers and attainable mitigation plans are mentioned in response to the adventure of the catastrophic eruption of El Chichón that happened in 1982. The booklet also will comprise formerly unpublished fabric at the plant life and the fauna of the quarter and archaeological and social features of the realm that's inhabited via indigenous people.
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Additional resources for Active Volcanoes of Chiapas (Mexico): El Chichón and Tacaná
1984; Manea et al. 2005), complicates the tectonic framework of the area. Tacaná (4,050 masl) represents the northernmost volcano of the Central American Volcanic Arc (CAVA) (Mercado and Rose 1992; Mora et al. 2004; García-Palomo et al. 2006). El Chichón (1,100 masl) is the youngest structure of the NW-trending Modern Chiapanecan Volcanic Arc (MCVA of Damon and 24°N Los Tuxtlas Volcanic Field S N N Salina Cruz Gulf of Tehuantepec 100 km Gulf of Mexico Coast Coast 22° 20° 200 km North American Plate TMVB Puebla 250 km TVF 18° Oaxaca El Chichón Belize Guatemala 16° Salina Cruz CVB gua MAT Caribbean Plate CAV El Salvador Honduras Cocos Plate 96° 94° A 76 14° Mota Tacaná TR Fig.
1984). Moreover, the trachyandesites emitted in 1982 were rich in K, Rb, Sr, Th, U, and Cs, compared to other Mexican and Central American volcanoes, fact that was attributed to the relatively large distance from the Middle America Trench (Luhr et al. 1984) (Fig. 1). Alkaline rocks in subduction zones have been linked to the presence of fracture zones (DeLong et al. 1975). At El Chichón, such assumption would be consistent with the presence of the Tehuantepec ridge underneath this volcano (Fig.
The whole rock pumice samples from 1982 eruption are characterized by similar SiO2 contents (55– 58 wt%) compared to other units of the Holocene, and Pleistocene groups (Espíndola et al. 2000; Andrews et al. 2008). In contrast, samples from the domes (Cambac, Capulin, NW and SW domes) apparently show a broader variation in SiO2 contents (52–60 wt %) (McGee et al. 1987; Espíndola et al. 2000; Layer et al. 2009; Rose et al. 1984; Arce et al. 2014) (Fig. 3). 5 wt% SiO2) being mainly trachybasalts (Fig.