Gerhard P. Brey

TL;DR: Weyer et al. as discussed by the authors showed that there is increasing evidence for a systematically lighter Fe-isotope composition of the terrestrial upper mantle compared to basalts, and that Fe isotope fractionation during partial melting is the most likely process responsible for this isotopic difference.

TL;DR: In this paper, the authors compared two techniques for determining the ferric iron content in Fe x O using the electron microprobe: (i) a direct method termed the flank method (Hofer et al., 1994), which is based on the concomitant changes of both the intensity ratio and the wave length of the Fe Lα and Fe Lβ X-ray emission lines with Fe 2+ /Fe 3+, and (ii) an indirect method by calculating Fe 2+,/Fe 3+, from elemental microproprobe analyses which may include oxygen.

TL;DR: Copper isotopes can be successfully used to determine the origin of copper or bronze artefacts from either primary or supergene sulphide or hydrocarbonate ores as discussed by the authors, and they provide information on the origin and type of the metal ore.

TL;DR: In this article, the authors investigated simplified members of the alkali-titanate mineral series priderite, lindsleyite-mathiasite (LIMA), and hawthorneite-yimengite (HAWYIM) at pressures between 3.5 and 5 GPa.

TL;DR: Bendall et al. as discussed by the authors investigated the contribution of gold to the total lead in the Au-Ag-Cu coin alloys and showed that possible gold sources include both eastern Mediterranean and Alpine sources.