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Full Description
This book is a collection of papers concerned with the processes and products of magma-sediment mingling and the origin of peperite. Three papers are concerned with physical modelling of magma-wet sediment interaction, whereas the majority of the papers describe a wide variety of peperite compositional and textural types, and discuss controls on their formation. The first paper reviews the current understanding of peperite generation, and serves as an extended introduction to the volume. Peperite is a common rock type generated in many volcanic and sub-volcanic environments. Its study is important for several reasons. Correct identification of peperite is critical in palaeoenvironmental reconstruction and relative chronology, as its presence can demonstrate contemporaneity of volcanism and sedimentation. Peperite may also record a snapshot of the processes that occur prior to hydromagmatic explosions, and which are otherwise not preserved in the resulting deposit. Its study can therefore provide information on the factors and mechanisms that influence the likelihood of such hazardous explosions.
Peperite also indicates the presence of syn-volcanic sills that may be important sources of heat and/or fluids for co-eval hydrothermal systems.
Contents
Research Papers: Peperite - a review of magma-sediment mingling, I.P. Skilling et al.; Water/magma interaction - some theory and experiments on peperite formation, K. Wohletz; Dynamic mingling of magma and liquefied sediments, B. Zimanowski, R. Buttner; Characteristics and origin of peperite involving coarse-grained host sediment, R.J. Squire, J. McPhie; Magma composition and viscosity as controls on peperite texture - an example from Passamaquoddy Bay, southeastern Canada, K.A. Dadd, N.A. Van Wagoner; Middle Miocene volcaniclastic dikes at Kukedo, Shimane Peninsula, SW Japan - fluidization of volcaniclastic beds by emplacement of syn-volcanic andesitic dikes, K. Kano; Peperite as a record of early-stage phreatomagmatic fragmentation processes - an example from the Hopi Buttes volcanic field, Navajo Nation, Arizona, USA, J.A. Hooten, M.H. Ort; On the formation of deep-seated subterranean peperite-like magma-sediment mixtures, V. Lorenz et al.; Rhyolitic globular peperites from the Aznalcollar mining district, (Iberian Pyrite Belt, Spain) - physical and chemical controls, T. Donaire et al.; Melting and mingling of phonolitic pumice deposits with intruding dykes - an example from the Otago Peninsula, New Zealand, U. Martin, J.D.L. White; Morphology of a crater-filling lava lake margin, The Peninsula tuff cone, Tule Lake National Wildlife Refuge, California - implications for formation of peperite textures, A. Lavine, K.R. Aalto; Peperitic textures of Ordovician dacitic synsedimentary intrusions in Argentina's Puna Highland - clues to emplacement conditions, B. Coira, B. Perez; Pumiceous rhyolitic peperite in ancient submarine volcanic successions, C.C. Gifkins et al.; Granulation of weak rock as a precursor to peperite formation - coal peperite, Coombs Hills, Antarctica, M.K. McClintock, J.D.L. White; Textural evidence of peperites inside pillow lavas at Acicastello Castle Rock, Mt. Etna, Sicily), R.A. Corsaro, P. Mazzoleni; Lava-sediment interaction in desert settings; are all peperite-like textures the result of magma-water interaction?, D.A. Jerram, H. Stollhofen.
