首页 | 本学科首页   官方微博 | 高级检索  
     检索      


A new experimental technique for extracting liquids from peridotite at very low degrees of melting: application to partial melting of depleted peridotite
Authors:Email author" target="_blank">Didier?LaporteEmail author  Michael?J?Toplis  Monique?Seyler  Jean-Luc?Devidal
Institution:(1) Laboratoire Magmas et Volcans, CNRS et Université Blaise Pascal, OPGC, 5 rue Kessler, 63038 Clermont-Ferrand, France;(2) CRPG-CNRS, BP20, 54501 Vandoeuvre-lès-Nancy, France;(3) Laboratoire de Géosciences Marines, CNRS-UMR 7097, Institut de Physique du Globe de Paris, Case 89, 4 place Jussieu, 75252 Paris cedex 05, France
Abstract:A new technique that allows extraction of liquids from peridotite at degrees of melting phgr as low as 0.2 wt% is presented. Microfractures that formed in the graphite sample container at the beginning of the experiments were used as traps for the liquid phase. Glass-filled cracks (or 'microdikes') unaffected by quench crystallisation were produced in all experiments and were analysed using standard electron microprobe techniques. Reversal experiments demonstrated that, at moderate degrees of melting (4.4 and 6.5 wt%), the segregated liquid was in equilibrium with the neighbouring peridotite. At very low degrees of melting (0.3 wt%), the liquid in the microdikes failed to fully equilibrate with the peridotite after 5 days and the sandwich technique was used in combination with the microdike technique to approach more closely the equilibrium composition of near-solidus partial melts. The microdike technique was used to study melting of a depleted peridotite at 1 GPa and 1,220 to 1,360 °C.Editorial responsibility: T.L. Grove
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号