A modified iterative sandwich method for determination of near-solidus partial melt compositions. I. Theoretical considerations |
| |
| Authors: | Marc M Hirschmann Rajdeep Dasgupta |
| |
| Institution: | (1) Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455, USA;(2) Present address: Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, USA |
| |
| Abstract: | The sandwich technique for determining the composition of partial melts in equilibrium with mantle lithologies may be a particularly
powerful method for determining melt compositions at the onset of melting if the method is applied iteratively. However, conventional
iterative sandwich experiments, in which the liquid from a preceding experiment is used as the “meat” of the sandwich in the
following experiment, may require many iterations before the melts produced can be directly relatable to the melting relations
of the target bulk rock composition. A modified iterative sandwich experimental (MISE) technique is proposed that may circumvent
many of the problems of more conventional techniques. Consideration of experimental uncertainties, including both random and
systematic errors in determination of partial melt compositions as well as the influence of errors in estimates of the solidus
temperature of the rock of interest, suggests that the MISE technique may produce robust results even when melt composition
errors are significant and that errors in estimation of the solidus location are detectable and therefore avoidable. |
| |
| Keywords: | Batch melting Experimental petrology Iterative sandwich experiments Mantle peridotite Partial melting |
| 本文献已被 SpringerLink 等数据库收录！ |
|
