The use of palaeomagnetism and rock magnetism to understand volcanic processes
By: edited by M.H. Ort, Northern Arizona University, USA, M. Porreca, University of Perugia, Italy, and J.W. Geissman, University of Texas at Dallas, USA
Series: Geological Society special publication -- no. 396; Geological Society special publication -- no. 396.
Publisher: The Geological Society
Published: 2015
Place of publication: London
Language: eng
Number of pages: 281
ISBN-13: 9781862396296
Subjects: Paleomagnetism; Thermoremanent magnetization; Volcanological research; Magnetic properties; Rocks
Description: This volume provides a synopsis of current research on volcanic processes, as gained through the use of palaeomagnetic and rock magnetic techniques. Thermoremanent magnetization information provides a powerful means of deciphering thermal processes in volcanic deposits, including estimating the emplacement temperature of pyroclastic deposits, which allows us to understand better the rates of cooling during eruption and transport. Anisotropy of magnetic susceptibility and anisotropy of remanence are used primarily to investigate rock fabrics and to quantify flow dynamics in dykes, lava flows, and pyroclastic deposits, as well as identify vent locations. Rock-magnetic characteristics allow correlation of volcanic deposits, but also provide means to date volcanic deposits and to understand better their cooling history. Because lava flows are typically good recorders of past magnetic fields, data from them allow understanding of changes in geomagnetic field directions and intensity, providing clues on the origin of Earth's magnetic field.--
Notes: Includes bibliographical references and index.
Table of contents: title: The use of palaeomagnetism and rock magnetism to understand volcanic processes: introduction / M.H. Ort, M. Porreca, and J.W. Geissman; title: Thermoemanent Magnetization in Volcanic Rocks and Emplacement Temperature Estimates; title: Temperatures of the pyroclastic density currents deposits emplaced in the last 22 kyr at Somma-Vesuvius (Italy) / E. Zanella, R. Sulpizio, L. Gurioli, and R. Lanza; title: Deposit temperature of pyroclastic density currents emplaced during the El Chichon 1982 and Colima 1913 eruptions / R. Sulpizio, E. Zanella, J.L. Macias and R. Saucedo; title: Rock-magnetic evidence for the low-temperature emplacement of the Habushiura pyroclastic density current, Niijima Island, Japan / R. Nakaoka and K. Suzuki-Kamata; title: Hot clasts and cold blasts: thermal heterogeneity in boiling-over pyroclastic density currents / E. Rader, D. Geist, J. Geissman, J. Dufek, and K. Harpp; title: Anisotropy of Magnetic Susceptibility (AMS) as a Flow Indicator; title: Discerning magmatic flow patterns in shallow-level basaltic dykes from the NE rift zone of Tenerife, Spain, using the Anisotropy of Magnetic Susceptibility (AMS) technique / A. Delcamp, M.S. Petronis and V.R. Troll; title: Magma flow and palaeo-stress deduced from magnetic fabric analysis of the Alftafjorour dyke swarm: implications for shallow crustal magma transport in Icelandic volcanic systems / P.I. Eriksson, M.S. Riishuus and S.A. Elming; title: Magma flow within dykes in submarine hyaloclastite environments: an AMS study of the Miocene Cabo de Gata volcanic units / M. Porreca, F. Cifelli, C. Soriano, G. Giordano and M. Mattei; title: Magnetic fabric of ignimbrites: a case study from the Central Anatolian Volcanic Province / A. Agro, E. Zanella, J.L. LePennec and A. Temel; title: Flow behaviour in the intra-caldera setting: an AMS study of the large (>1290 km³) Permian Ora Ignimbrite / M.A.W. Willcock, M. Mattei, P. Hasalova, G. Giordano, R.A.F. Cas and C. Morelli; title: Towards the definition of AMS facies in the deposits of pyroclastic density currents / M.H. Ort, T.T. Newkirk, J.F. Vilas and J.A. Vazquez; title: Rock Magnetism; title: Magnetic properties of the Campanian Ignimbrite and the marine Y5 tephra layer / L. Vigliotti; title: Oxidation processes and their effects on the magnetic remanence of Early Cretaceous subaerial basalts from Sierra Chica de Cordoba, Argentina / S.E. Geuna, S.L. Lagorio and H. Vizan; title: Volcanic glass and its suitability to recover the ancient geomagnetic field strength / A. Ferk, R. Leonhardt, K.U. Hess and D.B. Dingwell.