By Teresa Scolamacchia, José Luis Macías
This booklet summarizes the reviews conducted at of the main lively 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 stories started to unreveal their volcanic historical past and impression.
This booklet provides the cutting-edge advances in themes concerning the geologic atmosphere of the 2 volcanoes, their eruptive historical past and composition of erupted items, the hydrothermal structures and their manifestations. Volcanic risks and hazards and attainable mitigation plans are mentioned according to the adventure of the catastrophic eruption of El Chichón that happened in 1982. The booklet also will contain formerly unpublished fabric at the flowers and the fauna of the zone and archaeological and social features of the world that's inhabited by means of indigenous people.
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Extra info for Active Volcanoes of Chiapas (Mexico): El Chichón and Tacaná
3), particularly some trachybasalts and trachyandesites. Harker diagrams (Fig. e. trachybasalts) could represent the parental compositions for the more evolved trachyandesites erupted at El Chichón. Maﬁc enclaves are often interpreted as the product of magma mixing (Eichelberger et al. 1976; Stimac and Pierce 1992). 3 (b) 1000 Rock/Primitive Mantle Fig. 4 a MgO versus CaO/ Al2O3 ratio for El Chichón samples. All samples were recalculated to 100 % on an anhydrous basis; b Spider diagram of selected El Chichón samples, normalized to primitive mantle (Sun and McDonough 1989).
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. 3a–j) with high contents of K2O (Macías et al. 2003; Espíndola et al. 2000; Layer et al. 2009; Arce et al. 2014). The most maﬁc product of the area is the Chapultenango trachybasalt (Espíndola et al. 2000; Layer et al.
1). Tacaná is a typical stratovolcano with steep slopes that belongs to the Tacaná Volcanic Complex (TVC, see Chaps. 1 and 6). It is composed of calc-alkaline, andesitic to dacitic lava flows, and pyroclastic deposits of similar compositions (Mercado and Rose 1992; Mora et al. 2004; García-Palomo et al. 2006). It lies on the trace of the sinistral Polochic-Motagua Fault zone, which according to Guzman-Speziale et al. (1989) represents the boundary between the North American and Caribbean plates in Guatemala and southern Mexico.
Active Volcanoes of Chiapas (Mexico): El Chichón and Tacaná by Teresa Scolamacchia, José Luis Macías