Partition coefficients of trace elements: Application to volcanic rocks of St. Vincent,West Indies |
| |
| Authors: | J Dostal C Dupuy JP Carron M Le Guen de Kerneizon RC Maury |
| |
| Institution: | 1. Department of Geology, Saint Mary''s University, Halifax, Nova Scotia, B3H 3C3, Canada;2. Centre Géologique et Géophysique, Université des Sciences et Techniques du Languedoc, Place E. Bataillon, 34060 Montpellier Cedex, France;3. Laboratoire de Géologie. Ecole Normale Supérieure, 46, rue d''Ulm—75005 Paris, France;4. Laboratoire de Pétrologie. Université de Bretagne Occidentale, 29283 Brest Cedex, France |
| |
| Abstract: | Island arc basaltic rocks (basalts and basic andesites with SiO2 < 56.5%) from the Soufrière volcano. St. Vincent, West Indies (prehistoric lavas and 1902 and 1979 eruptions) underwent extensive fractional crystallization at various levels during the ascent of the magma. Although the precipitation of minerals occurring in coarse-grained cumulate inclusions dominated the derivation of basic andesites from basaltic magma, the distribution of the trace elements is not consistent with a simple fractional crystallization process. The lavas have a partially cumulate character and were probably generated from similar but separate parental magmas. The partition coefficients of transition and large ion lithophile elements are given for clinopyroxene, amphibole. olivine, plagioclase and titanomagnetite in basaltic liquid which crystallized under well-defined P-T conditions. The temperatures obtained from the geothermometers based upon the distribution of the major elements are in good agreement with the data from trace element geothermometers. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
