Gravity anomalies, Quaternary vents, and Quaternary faults in the southern Cascade Range, Oregon and California: Implications for arc and backarc evolution
Blakely RJ, Christiansen R, Guffanti M, Wells RE, Donnelly-Nolan JM, Muffler LJ, Clynne MA, Smith JG. 1997. Gravity anomalies, Quaternary vents, and Quaternary faults in the southern Cascade Range, Oregon and California: Implications for arc and backarc evolution. Journal of Geophysical Research. 102(B10):22,513-22,527
Residual gravity anomalies are common over volcanoes and volcanic centers, reflecting the relatively low density of volcanic products, the geothermal conditions of the crust, and the structural and magmatic underpinnings of the volcanism. This relationship is particularly well displayed in northern California where a well-defined gravity anomaly over the volcanic centers at Mount Shasta and Medicine Lake volcano is distinctly isolated from a similar anomaly over the Lassen Volcanic center to the south and from gravity anomalies to the north over Oregon High Cascades. The study examines this part of the Cascade arc focusing on the spatial relationship between gravity anomalies and the distributions of Quaternary vents, Quaternary faults, crustal earthquakes, seismic velocity structure, and other crustal manifestations of stress, tectonisms, and geothermal conditions.
- Type
- Journal Article
- Authors
- Blakely, Richard; Christiansen, Robert; Guffanti, Marianne; Wells, Ray; Donnelly-Nolan, Julie; Muffler, L; Clynne, Michael; Smith, James
- Units
- LAVO
- Keywords
- Earthquakes, geothermal conditions, Gravity, Lassen Peak, Physical Sciences, Plate Tectonics, Seismic Activity, Volcanoes