Evolution of silicic magma chambers and their relationship to basaltic volcanism
Eichelberger JC and Gooley R. 1976. Evolution of silicic magma chambers and their relationship to basaltic volcanism. LA-UR 76-1708. Los Alamitos Scientific Laboratory of the University of California. Los Alamos, NM
Basaltic magma appears to have a major role in initiating large silicic magma systems, and basaltic magma from the upper mantle may provide heat for generating rhyolitic melt in the lower crust. Silicic chambers also appear to be directly influenced by basaltic magma and evidence is given within the paper to support this assertion. This paper presents a model which is based on basaltic magma being the initiator of silicic magma systems, and also explains the origin of a variety of igneous complexes. The model is also supported by various data including phase assemblage, elemental and isotopic composition, texture, and field relationships of volcanic and plutonic rocks. Finally, the tectonic setting of the crustal residence time of silicic chambers appears to strongly affect how homogenized the system is. Lavas from Lassen volcanic area are one of many that are analyzed within this paper.
- Type
- Published Report
- Authors
- Eichelberger, J; Gooley, R
- Date of Issue
- 1976
- Publisher
- Los Alamitos Scientific Laboratory of the University of California
- Units
- LAVO
- Keywords
- Basalt, Geothermal Activity, igneous, Lava, Magma, Physical Sciences, rhyolitic, Silicic, Volcanism