terça-feira, 9 de novembro de 2010

M. Davies, L. s, R. S. J. Sparks, R. M. Mellors, D. M. Pyle, M. Lanphere, B. Barreirio, "Santorini Volcano (Geological Society Special Memoir, 19)"

M. Davies, L. s, R. S. J. Sparks, R. M. Mellors, D. M. Pyle, M. Lanphere, B. Barreirio, "Santorini Volcano (Geological Society Special Memoir, 19)"
Publisher: Geological Society of London | 1999 | ISBN 1862390487 | PDF | 165 pages | 18.9 MB

Santorini is one of the most spectacular caldera volcanoes in the world. It has been the focus of significant scientific and scholastic interest because of the great Bronze Age explosive eruption that buried the Minoan town of Akrotiti. Santorini is still active. It has been dormant since 1950, but there have been several substantial historic eruptions. Because of this potential risk to life, both for the indigenous population and for the large number of tourists who visit it, Santorini has been designated one of five European Laboratory Volcanoes by the European Commission. Santorini has long fascinated geologists, with some important early work on volcanoes being conducted there. Since 1980, research groups at University, and later at the University of Bristol and Blaise Pascal University in Clermont-Ferand, have collected a large amount of data on the stratigraphy, geo, geochronology and petrology of the volcanics. The volcanic field has been remapped at a scale of 1:20 000. A remarkable picture of cyclic volcanic activity and magmatic evolution has emerged from this work. Much of this work has remained unpublished until now.

Continental Tectonics (Geological Society Special Publication)

Continental Tectonics (Geological Society Special Publication)
Publisher: Geological Society of London | ISBN: 1862390517 | edition 1999 | PDF | 300 pages | 30,2 mb

The evolution of oceanic plates is very well described by plate tectonic theory, but the study of continental tectonics is more complicated. Continental plates have a different rheology, a greater mean age, a higher heat productivity, and are more heterogeneous in composition. An understanding of continental tectonics requires, therefore, that these effects upon rigid plate behaviour be taken into account. This book brings together a series of papers which explore various aspects of the deformation of continental lithosphere, covering different tectonic settings from the Palaeozoic to the present day. These include the processes of terrane accretion and juxtaposition, the exhumation of high-pressure terrains, and mechanisms of crustal extension and rifting. The book will be of general interest to a broad audience of earth scientists concerned with global tectonics, continental growth processes, and the deformation of the continents during collision, exhumation and extension.

R. D. Larter, "Intra-Oceanic Subduction Systems: Tectonic and Magmatic Processes (Geological Society Special Publication)"

R. D. Larter, "Intra-Oceanic Subduction Systems: Tectonic and Magmatic Processes (Geological Society Special Publication)"
Geological Society of London; illustrated edition (January 1, 2003) | English | 1862391475 | 352 pages | PDF | 37.92 MB

Recycling of oceanic plate back into the Earth's interior at subduction zones is one of the key processes in Earth evolution. Volcanic arcs, which form above subduction zones, are the most visible manifestations of plate tectonics, the convection mechanism by which the Earth loses excess heat. They are probably also the main location where new continental crust is formed, the so-called 'subduction factory'. About 40% of modern subduction zones on Earth are intra-oceanic. These subduction systems are generally simpler than those at continental margins as they commonly have a shorter history of subduction and their magmas are not contaminated by ancient sialic crust. They are therefore the optimum locations for studies of mantle processes and magmatic addition to the crust in subduction zones.
This volume contains a collection of papers that exploit the relative simplicity of intra-oceanic subduction systems to provide insights into the tectonic, magmatic and hydrothermal processes associated with subduction.