Authors
Sarah AS Dare, Sarah-Jane Barnes, Georges Beaudoin, Julien Méric, Emilie Boutroy, Christophe Potvin-Doucet
Publication date
2014/10
Journal
Mineralium Deposita
Volume
49
Pages
785-796
Publisher
Springer Berlin Heidelberg
Description
We have characterized the distribution of 25 trace elements in magnetite (Mg, Al, Si, P, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Sn, Hf, Ta, W, and Pb), using laser ablation ICP-MS and electron microprobe, from a variety of magmatic and hydrothermal ore-forming environments and compared them with data from the literature. We propose a new multielement diagram, normalized to bulk continental crust, designed to emphasize the partitioning behavior of trace elements between magnetite, the melt/fluid, and co-crystallizing phases. The normalized pattern of magnetite reflects the composition of the melt/fluid, which in both magmatic and hydrothermal systems varies with temperature. Thus, it is possible to distinguish magnetite formed at different degrees of crystal fractionation in both silicate and sulfide melts. The crystallization of ilmenite or sulfide before magnetite is recorded as a marked …
Scholar articles
SAS Dare, SJ Barnes, G Beaudoin, J Méric, E Boutroy… - Mineralium Deposita, 2014