J. McNeill

TL;DR: X-ray diffraction, Raman and infrared spectroscopic data are reported that provide the first evidence for the terrestrial occurrence of any higher-pressure polymorph of olivine: ringwoodite is included in a diamond from Juína, Brazil, providing direct evidence that, at least locally, the transition zone is hydrous.

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: Akagi et al. as discussed by the authors presented the results of the first multi radiogenic-isotope (Sr, Nd, Pb) and trace element study on fluid-rich diamonds, implemented using a newly developed off-line laser sampling technique.

TL;DR: A new ICPMS-based (ICPMS: inductively coupled plasma mass spectrometry) method for the analysis of trace element concentrations within fluid-poor, gem-quality diamonds is presented, providing some supporting evidence of a link between the parental fluids for both fluid-inclusion-rich and gem diamonds.

TL;DR: In this paper, the authors presented combined trace element composition (34 diamonds) and isotope data (23 diamonds) for fluid-rich diamonds from six worldwide locations, including a diamond from Udachnaya and two from Snap Lake.