Dawnika L. Blatter, PhD
Dawnika is a Research Geologist with the California Volcano Observatory (CalVO). She conducts high-pressure, high-temperature experimental studies in the Magma Dynamics laboratory to complement field and petrologic studies of volcanic systems.
Dawnika works on understanding magmas, including their melt, crystal, and volatile components as they form, undergo evolution, and ultimately erupt (or not). She uses experimental petrology, coupled with microbeam analyses, FTIR, and petrographic data, to determine magmatic conditions including: temperature, pressure, oxygen fugacity, and compositions and proportions of all phases (including volatiles). She combines this information with field observations on distribution, timing, and volumes of eruptive products to connect eruptive processes to fundamental source conditions. Field-based projects include extensive mapping and sampling across the Mexican Volcanic Belt, work on Cascade arc volcanoes, Aleutian arc volcanoes, and most recently in the Clear Lake Volcanic Field and Mount Shasta region of northern California.
Education and Certifications
Ph.D. in Geology and Geophysics, 1998, University of California, Berkeley
Dissertation Title: Subduction-related volcanism: Field and experimental studies of hydrous lavas in central Mexico
B.S. with Honors in Geology, 1991, University of California, Davis.
Science and Products
Dataset establishing shallow storage of the explosive Earthquake Flat Pyroclastics magma body, Okataina Volcanic Center, Taupo Volcanic Zone, New Zealand: evidence from phase-equilibria experiments
Dataset establishing garnet stability in arc basalt, andesite, and dacite – an experimental study
Dataset Establishing Temporal Duration of Two Shield Volcanoes in Northern California
Shallow storage of the explosive Earthquake Flat Pyroclastics magma body, Okataina Volcanic Center, Taupo Volcanic Zone, New Zealand: Evidence from phase-equilibria experiments
Garnet stability in arc basalt, andesite, and dacite—An experimental study
Paleomagnetically defined brief lifespans for two large shield volcanoes in the Cascades Arc
Barometers behaving badly: Assessing the influence of analytical and experimental uncertainty on clinopyroxene thermobarometry calculations at crustal conditions
Water contents of clinopyroxenes from sub-arc mantle peridotites
Voluminous arc dacites as amphibole reaction-boundary liquids
Crystallization of oxidized, moderately hydrous arc basalt at mid- to lower-crustal pressures: Implications for andesite genesis
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Dataset establishing shallow storage of the explosive Earthquake Flat Pyroclastics magma body, Okataina Volcanic Center, Taupo Volcanic Zone, New Zealand: evidence from phase-equilibria experiments
Dataset establishing garnet stability in arc basalt, andesite, and dacite – an experimental study
Dataset Establishing Temporal Duration of Two Shield Volcanoes in Northern California
Shallow storage of the explosive Earthquake Flat Pyroclastics magma body, Okataina Volcanic Center, Taupo Volcanic Zone, New Zealand: Evidence from phase-equilibria experiments
Garnet stability in arc basalt, andesite, and dacite—An experimental study
Paleomagnetically defined brief lifespans for two large shield volcanoes in the Cascades Arc
Barometers behaving badly: Assessing the influence of analytical and experimental uncertainty on clinopyroxene thermobarometry calculations at crustal conditions
Water contents of clinopyroxenes from sub-arc mantle peridotites
Voluminous arc dacites as amphibole reaction-boundary liquids
Crystallization of oxidized, moderately hydrous arc basalt at mid- to lower-crustal pressures: Implications for andesite genesis
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.