Geoff Nowell

TL;DR: In this paper, the authors demonstrate that many of the hallmark geochemical features of kimberlites, such as relative Zr-Hf depletions, can be produced by low-degree partial melting of carbonated fertile peridotite within the asthenosphere.

TL;DR: The results imply a strong association between subduction, mantle metasomatism and fluid-rich diamond formation, emphasizing the importance of subduction-derived fluids in affecting the composition of the deep lithospheric mantle.

TL;DR: Modeling shows that involvement in the mantle source of either bulk pyroxenite or, more likely, metasomatic sulfides derived from either pyroxanite or peridotite melts can explain the 186Os-187Os signatures of oceanic basalts, which removes the requirement for core-mantle exchange and provides an effective mechanism for generating Os isotope diversity in basalt source regions.

TL;DR: Scherer et al. as discussed by the authors used U-Pb and Hf isotopic measurements on zircons from the western Superior province to confirm that the area contains at least three distinct terrane types.

TL;DR: In this paper, a conceptual modification was proposed to demonstrate that OIB-type domains within ancient subducted oceanic lithosphere can produce much stronger negative Δ e Hf during long-term isolation.