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DR. GARY SMITH |
Thermal characteristics of volcaniclastic deposits are central to interpreting their origin. Paleomagnetic methods can be employed to estimate the emplacement temperatures of such deposits. We have used these methods to (1) interpret cooling histories and determine thermal profiles of ignimbrites and (2) to characterize volcanic breccias and, along with other properties, determine the role of pyroclastic and autoclastic processes in their formation.
Collaborator:
Dr. John Geissman, University of New Mexico
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Temperature of emplacement studies on block-and-ash flow and debris-flow breccias at Mount Hood, Oregon
M.J. Grubensky, G.A. Smith, and J.W. Geissman
Geological Society of America, Geol. Soc. America Abstr. Prog., v. 25, p. 45, 1993.
Temperature-of-emplacement estimates of co-ignimbrite lithic-lag breccias from Mt. Mazama (Crater Lake), Oregon
M.J. Grubensky, G.A. Smith, J.W. Geissman
EOS, Trans. Amer. Geophys. Union, v. 74, no. 43 (supplement), p. 639, 1993.
Estimated paleomagnetic emplacement temperatures of the Taupo Ignimbrite, New Zealand: Defining thermal characteristics of a pyroclastic flow
D. Bahar, G.A. Smith, J.W. Geissman, M.J. Grubensky
EOS, Trans. Amer. Geophys. Union, v. 74, no. 43 (supplement), p. 639, 1993.
Paleomagnetic emplacement temperature and thermal-profile estimates for nonwelded pyroclastic-flow deposits, Miocene Peralta Tuff, Jemez Mountains, New Mexico
J.D. Moore, J.W. Geissman, G.A. Smith
EOS, Transactions of the American Geophysical Union, v. 78, no. 46 (abstract supplement), p. F178, 1997.
Field classification and paleomagnetic characterization of lithic and scoriaceous breccias, Pleistocene Broken Top volcano, High Cascade Range, Oregon
M.J. Grubensky, G.A. Smith, and J.W. Geissman
Journal of Volcanology and Geothermal Research, v. 83, p. 93-114, 1998.
Nature and origin of cone-forming volcanic breccias, Te Herenga Formation, Ruapehu Volcano, New Zealand
G.A. Smith, M.J. Grubensky, J.W. Geissman
Bulletin of Volcanology, v. 61, p. 64-82, 1999.
Paleomagnetic estimation of emplacement temperature of pumice in the Taupo Ignimbrite, North Island, New Zealand.
J.W. Geissman, G.A. Smith, D. Bahar
(in preparation).
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