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Time Scales of Crystal Fractionation in Magma Chambers--Integrating Physical, Isotopic and Geochemical Perspectives |
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| Authors: | HAWKESWORTH C J; BLAKE S; EVANS P; HUGHES R; MACDONALD R; THOMAS L E; TURNER S P; ZELLMER G |
| Institution: | 1DEPARTMENT OF EARTH SCIENCES, THE OPEN UNIVERSITY, MILTON KEYNES MK7 6AA, UK 2DEPARTMENT OF EARTH SCIENCES, UNIVERSITY OF CAMBRIDGE, DOWNING STREET, CAMBRIDGE CB2 3EQ, UK 3DEPARTMENT OF ENVIRONMENTAL SCIENCE, LANCASTER UNIVERSITY, LANCASTER LA1 4YQ, UK 4DEPARTMENT OF EARTH SCIENCES, UNIVERSITY OF BRISTOL, BRISTOL BS8 1RJ, UK |
| Abstract: | A simple heat balance model for an evolving magma chamber isused to make predictions of the time scales for magma differentiation,which are compared with geological and isotopic constraintson the rates of crystallization and differentiation. In a 10km3 magma chamber releasing thermal energy at a rate of 100MW, basalt and rhyolite magmas should reach 50% crystallizationafter |
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