Abstract
Rhyolitic domes are commonly regarded as monogenetic volcanoes associated with single, brief eruptions, in contrast to andesitic or dacitic domes that usually show a complex evolution including alternating long periods of growth and explosive destruction. Rhyolitic domes are characterized by short-lived successions of pyroclastic and effusive activity associated with a series of discrete eruptive events that apparently last on the order of years to decades or perhaps up to centuries. Cerro Pizarro, a rhyolitic dome in the eastern Mexican Volcanic Belt, is a relatively small (~ 1.1 km3), isolated volcano that shows aspects of polygenetic volcanism including long-term repose periods (~ 50-80 ky) between eruptions, chemical variations over time, and a complex evolution of alternating explosive and effusive eruptions, including a cryptodome phase, a sector-collapse event and prolonged erosional processes. This eruptive behavior provides new insights into how rhyolite domes may evolve, in contrast to the traditional models of rhyolitic domes as short-lived, monogenetic systems. A protracted, complex evolution bears important implications for hazard assessment if reactivation of an apparently extinct rhyolitic dome must be seriously considered.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 307-315 |
| Number of pages | 9 |
| Journal | Journal of Volcanology and Geothermal Research |
| Volume | 171 |
| Issue number | 3-4 |
| DOIs | |
| State | Published - Apr 20 2008 |
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Keywords
- dome growth
- Mexican Volcanic Belt
- monogenetic volcanism
- polygenetic volcanism
- rhyolites
- volcanic hazards
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics
Cite this
Polygenetic nature of a rhyolitic dome and implications for hazard assessment : Cerro Pizarro volcano, Mexico. / Carrasco-Núñez, G.; Riggs, Nancy R.
In: Journal of Volcanology and Geothermal Research, Vol. 171, No. 3-4, 20.04.2008, p. 307-315.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Polygenetic nature of a rhyolitic dome and implications for hazard assessment
T2 - Cerro Pizarro volcano, Mexico
AU - Carrasco-Núñez, G.
AU - Riggs, Nancy R
PY - 2008/4/20
Y1 - 2008/4/20
N2 - Rhyolitic domes are commonly regarded as monogenetic volcanoes associated with single, brief eruptions, in contrast to andesitic or dacitic domes that usually show a complex evolution including alternating long periods of growth and explosive destruction. Rhyolitic domes are characterized by short-lived successions of pyroclastic and effusive activity associated with a series of discrete eruptive events that apparently last on the order of years to decades or perhaps up to centuries. Cerro Pizarro, a rhyolitic dome in the eastern Mexican Volcanic Belt, is a relatively small (~ 1.1 km3), isolated volcano that shows aspects of polygenetic volcanism including long-term repose periods (~ 50-80 ky) between eruptions, chemical variations over time, and a complex evolution of alternating explosive and effusive eruptions, including a cryptodome phase, a sector-collapse event and prolonged erosional processes. This eruptive behavior provides new insights into how rhyolite domes may evolve, in contrast to the traditional models of rhyolitic domes as short-lived, monogenetic systems. A protracted, complex evolution bears important implications for hazard assessment if reactivation of an apparently extinct rhyolitic dome must be seriously considered.
AB - Rhyolitic domes are commonly regarded as monogenetic volcanoes associated with single, brief eruptions, in contrast to andesitic or dacitic domes that usually show a complex evolution including alternating long periods of growth and explosive destruction. Rhyolitic domes are characterized by short-lived successions of pyroclastic and effusive activity associated with a series of discrete eruptive events that apparently last on the order of years to decades or perhaps up to centuries. Cerro Pizarro, a rhyolitic dome in the eastern Mexican Volcanic Belt, is a relatively small (~ 1.1 km3), isolated volcano that shows aspects of polygenetic volcanism including long-term repose periods (~ 50-80 ky) between eruptions, chemical variations over time, and a complex evolution of alternating explosive and effusive eruptions, including a cryptodome phase, a sector-collapse event and prolonged erosional processes. This eruptive behavior provides new insights into how rhyolite domes may evolve, in contrast to the traditional models of rhyolitic domes as short-lived, monogenetic systems. A protracted, complex evolution bears important implications for hazard assessment if reactivation of an apparently extinct rhyolitic dome must be seriously considered.
KW - dome growth
KW - Mexican Volcanic Belt
KW - monogenetic volcanism
KW - polygenetic volcanism
KW - rhyolites
KW - volcanic hazards
UR - http://www.scopus.com/inward/record.url?scp=41849124571&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=41849124571&partnerID=8YFLogxK
U2 - 10.1016/j.jvolgeores.2007.12.002
DO - 10.1016/j.jvolgeores.2007.12.002
M3 - Article
VL - 171
SP - 307
EP - 315
JO - Journal of Volcanology and Geothermal Research
JF - Journal of Volcanology and Geothermal Research
SN - 0377-0273
IS - 3-4
ER -