Geophysical Investigations of Magma Plumbing Systems at Cerro Negro Volcano, Nicaragua | Posted on:2014-03-10 | Degree:M.S | Type:Thesis | University:Simon Fraser University (Canada) | Candidate:MacQueen, Patricia Grace | Full Text:PDF | GTID:2450390005486486 | Subject:Geophysics | Abstract/Summary: | | Cerro Negro near Leon, Nicaragua is a very young (163 years), relatively small basaltic cinder cone volcano that has been unusually active during its short lifespan (recurrence interval 6--7 years), presenting a significant hazard to nearby communities. Previous studies have raised several questions as to the proper classification of Cerro Negro and its relation to neighboring Las Pilas-El Hoyo volcano.;Analysis of Bouguer gravity data collected at Cerro Negro has revealed connected positive density anomalies beneath Cerro Negro and Las Pilas-El Hoyo. These findings suggest that eruptions at Cerro Negro may be tapping a large magma reservoir beneath Las Pilas-El Hoyo, implying that Cerro Negro should be considered the newest vent on the Las Pilas-El Hoyo volcanic complex. As such, it is possible that the intensity of volcanic hazards at Cerro Negro may eventually increase in the future to resemble those pertaining to a stratovolcano.;Keywords: Cerro Negro; Las Pilas-El Hoyo; Bouguer gravity; magmatic plumbing systems; potential fields; volcano. | Keywords/Search Tags: | Cerro negro, Volcano, Las pilas-el hoyo, Plumbing systems, Bouguer gravity | | Related items |
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