Alfred (Fred) AndersonProfessor, Emeritus
- Research Focus:
- Geology, volcanology, igneous petrology
- (773) 702-8138
- Hinds 311
I am stymied to explain the stratigraphic variations found in some large-volume silicic pyroclastic deposits such as the Bishop Tuff, California. I use melt (now glass) inclusions in quartz phenocrysts to assess the depth and amount of exsolved gas in the preeruptive magma.
I have used melt inclusions to assess the roles of volatiles and of magma mixing in a wide range of magmas.
Anderson, A.T., Davis, A.M. and Lu, F., 2000, Evolution of Bishop Tuff Rhyolitic Magma Based on Melt and Magnetite Inclusions and Zoned Phenocrysts. J. Petrology, 41, 449 - 473.
Anderson, A.T. Jr. (1991) Hourglass inclusions: Theory and application to the Bishop Rhyolitic Tuff. Am. Mineral. 76:530-547.
Liu, Y., Anderson, A.T., Jr., Wilson, C.J.N. (2007) Melt pockets in phenocrysts and ascent rates of silicic magmas. J. Geophys. Res. - Solid Earth, 112, B06204, doi:10.1029/2006JB004500.