Cr-spinel from the Imandra layered pluton was studied by a variety of methods including mineralogical and petrographic investigations, microprobe, infrared (IR) spectroscopy, XRD, and Mössbauer spectroscopy on 57Fe nuclei. ...
Clay subfractions (SFs) of <0.1, 0.1-0.2, 0.2-0.3, 0.3-0.6, 0.6-2 and 2-5 μm separated from Middle Riphean shales of the Debengda Formation are studied using the TEM, XRD, K-Ar and Rb-Sr isotopic methods. The oxygen and ...