TY - JOUR
T1 - Explosive basaltic volcanism from Cerro Negro volcano
T2 - Influence of volatiles on eruptive style
AU - Roggensack, Kurt
AU - Hervig, Richard
AU - McKnight, Steven B.
AU - Williams, Stanley
PY - 1997/9/12
Y1 - 1997/9/12
N2 - The 1992 and 1995 basaltic eruptions of Cerro Negro volcano, Nicaragua, had contrasting eruptive styles. Although they were nearly identical in composition, the 1992 eruption was explosive, producing a 7-kilometer-high sustained ash column, whereas the 1995 eruption was essentially effusive. The differences in water and carbon dioxide contents of melt inclusions from the two eruptions define minimum saturation pressures and show how decompression of initially similar magmas influences eruptive style. Before eruption, the explosive 1992 magma retained water and carbon dioxide while ascending to a moderate crustal level (about 6 kilometers), whereas the nonexplosive 1995 magma lost all carbon dioxide by degassing during ascent to shallow crustal levels (about 1 to 2 kilometers).
AB - The 1992 and 1995 basaltic eruptions of Cerro Negro volcano, Nicaragua, had contrasting eruptive styles. Although they were nearly identical in composition, the 1992 eruption was explosive, producing a 7-kilometer-high sustained ash column, whereas the 1995 eruption was essentially effusive. The differences in water and carbon dioxide contents of melt inclusions from the two eruptions define minimum saturation pressures and show how decompression of initially similar magmas influences eruptive style. Before eruption, the explosive 1992 magma retained water and carbon dioxide while ascending to a moderate crustal level (about 6 kilometers), whereas the nonexplosive 1995 magma lost all carbon dioxide by degassing during ascent to shallow crustal levels (about 1 to 2 kilometers).
UR - http://www.scopus.com/inward/record.url?scp=0030798457&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030798457&partnerID=8YFLogxK
U2 - 10.1126/science.277.5332.1639
DO - 10.1126/science.277.5332.1639
M3 - Article
AN - SCOPUS:0030798457
SN - 0036-8075
VL - 277
SP - 1639
EP - 1642
JO - Science
JF - Science
IS - 5332
ER -