Charles W. Mandeville
I am a volcanologist and geochemist with the Alaska Volcano Observatory. I conduct research in physical volcanology, petrology of volcanic rocks and apply stable isotope geochemical techniques to volcanic degassing and elemental cycling.
Science and Products
The role of water in generating the calc-alkaline trend: New volatile data for aleutian magmas and a new tholeiitic index
The origin of tholeiitic (TH) versus calc-alkaline (CA) magmatic trends has long been debated. Part of the problem stems from the lack of a quantitative measure for the way in which a magma evolves. Recognizing that the salient feature in many TH–CA discrimination diagrams is enrichment in Fe during magma evolution, we have developed a quantitative index of Fe enrichment, the Tholeiitic...
Authors
Mindy M. Zimmer, Terry Plank, Erik H. Hauri, Gene Yogodzinski, Peter L. Stelling, Jessica Larsen, Brad S. Singer, Brian R. Jicha, Charlie Mandeville, Christopher J. Nye
Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite
Textural, compositional, and mineralogical data are reported and interpreted for a large population of clinoamphibole phenocrysts in 22 samples from the seven successive dacite spines erupted at Mount St. Helens between October 2004 and January 2006. Despite the uniformity in bulk composition of magma erupted since 2004, there is striking textural and compositional diversity among...
Authors
Carl Thornber, John S. Pallister, Heather A. Lowers, Michael C. Rowe, Charlie Mandeville, Gregory P. Meeker
Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering
Eighteen years after dome-forming eruptions ended in 1986, and with little warning, Mount St. Helens began to erupt again in October 2004. During the ensuing two years, the volcano extruded more than 80×106 m3 of gas-poor, crystal-rich dacite lava. The 2004-6 dacite is remarkably uniform in bulk-rock composition and, at 65 percent SiO2 , among the richest in silica and most depleted in...
Authors
John S. Pallister, Carl Thornber, Katharine Cashman, Michael A. Clynne, Heather A. Lowers, Charlie Mandeville, Isabelle K. Brownfield, Gregory P. Meeker
Science and Products
The role of water in generating the calc-alkaline trend: New volatile data for aleutian magmas and a new tholeiitic index
The origin of tholeiitic (TH) versus calc-alkaline (CA) magmatic trends has long been debated. Part of the problem stems from the lack of a quantitative measure for the way in which a magma evolves. Recognizing that the salient feature in many TH–CA discrimination diagrams is enrichment in Fe during magma evolution, we have developed a quantitative index of Fe enrichment, the Tholeiitic...
Authors
Mindy M. Zimmer, Terry Plank, Erik H. Hauri, Gene Yogodzinski, Peter L. Stelling, Jessica Larsen, Brad S. Singer, Brian R. Jicha, Charlie Mandeville, Christopher J. Nye
Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite
Textural, compositional, and mineralogical data are reported and interpreted for a large population of clinoamphibole phenocrysts in 22 samples from the seven successive dacite spines erupted at Mount St. Helens between October 2004 and January 2006. Despite the uniformity in bulk composition of magma erupted since 2004, there is striking textural and compositional diversity among...
Authors
Carl Thornber, John S. Pallister, Heather A. Lowers, Michael C. Rowe, Charlie Mandeville, Gregory P. Meeker
Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering
Eighteen years after dome-forming eruptions ended in 1986, and with little warning, Mount St. Helens began to erupt again in October 2004. During the ensuing two years, the volcano extruded more than 80×106 m3 of gas-poor, crystal-rich dacite lava. The 2004-6 dacite is remarkably uniform in bulk-rock composition and, at 65 percent SiO2 , among the richest in silica and most depleted in...
Authors
John S. Pallister, Carl Thornber, Katharine Cashman, Michael A. Clynne, Heather A. Lowers, Charlie Mandeville, Isabelle K. Brownfield, Gregory P. Meeker