caa a22 4500 475826043 CHVBK 20180406123829.0 cr unu---uuuuu 170329e20000201xx s 000 0 eng 10.1007/s004450050003 doi (NATIONALLICENCE)springer-10.1007/s004450050003 Cooling rates of hyaloclastites: applications of relaxation geospeedometry to undersea volcanic deposits [Elektronische Daten] [Martin Wilding, Donald Dingwell, Rodey Batiza, Lionel Wilson]  Glass fragments from three different hyaloclastites have been used to evaluate the range of cooling rates experienced by undersea volcanic deposits. We found that the glass fragments retain structures with a range of apparent quench rates from 25 to 0.15 K min-1. The most rapid cooling rates are interpreted to be those resulting from cooling of the lava near the water interface. Simple conductive cooling models produce a range of quench rates comparable to those of the more rapidly cooled samples. The very slow apparent quench rates are unlikely to result from simple linear cooling through the glass transition, because of the onset of crystallization; instead, they are indicators of a more complex thermal history that involves the annealing of glasses at temperatures within the glass transition interval for a dwell time sufficient to allow the relaxation of the glass to lower temperature structures. The thermal history recorded in these samples illustrates the complexity of eruptive processes and demonstrates that quench rates for natural glasses retain information relevant to more complex cooling models. Springer-Verlag Berlin Heidelberg, 2000 Key words Hyaloclastite nationallicence Quench rate nationallicence Thermal history nationallicence Thermal buffering nationallicence Wilding Martin Thermochemistry Facility, Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, USA e-mail: mcwilding@ucdavis.edu Fax: +530-7529307, US aut Dingwell Donald Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany, DE aut Batiza Rodey School of Ocean and Earth Sciences and Technology, University of Hawaii at Manoa, Honolulu, Hawaii, HI 96822, USA, US aut Wilson Lionel Department of Environmental Science, Lancaster University, Lancaster, LA1 4YQ, UK, GB aut https://doi.org/10.1007/s004450050003 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004450050003 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wilding Martin Thermochemistry Facility, Department of Chemical Engineering and Materials Science, University of California at Davis, Davis, CA 95616, USA e-mail: mcwilding@ucdavis.edu Fax: +530-7529307, US aut NATIONALLICENCE 700 1- Dingwell Donald Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany, DE aut NATIONALLICENCE 700 1- Batiza Rodey School of Ocean and Earth Sciences and Technology, University of Hawaii at Manoa, Honolulu, Hawaii, HI 96822, USA, US aut NATIONALLICENCE 700 1- Wilson Lionel Department of Environmental Science, Lancaster University, Lancaster, LA1 4YQ, UK, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer