Relationships between eruptive activity and magma supply on the historical origins of the Popocatepetl volcano

Abstract:

The modern volcano Popocatepetl is 30 000-50 000 yr old. Until 5000 yr BP, its volcanic activity led to the construction of a 2000 m high cone, the El Fraile volcano. This edifice was later topped by the Popocatepetl summit. The volcanic activity was characterized by long-term construction by lava flows, alternating with 3 periods of 1000-2000 yr of mixed explosive and effusive activity. Heterogeneous to subhomogeneous pyroclastic flow products exhibit a complex mineralogy. A model in which a basaltic magma is periodically injected in a differentiated chamber at the beginning of each explosive period (or each cycle?) is proposed to explain the heterogeneous products. Convection explains the complex mineralogy of these lavas, which result from differentiation of a previously homogenized magma rather than directly from magma mixing. -from English summary

Año de publicación:

1988

Keywords:

Fuente:

scopus