Composition of Hydrocarbons in Diamonds, Garnet, and Olivine from Diamondiferous Peridotites from the Udachnaya Pipe in Yakutia, Russia

• DOI: 10.1016/j.eng.2019.03.002
• Publication Date: 2019-04-13T14:42:49Z
• Authors: Nikolay V. Sobolev; Anatoly A. Tomilenko; Taras A. Bul'bak; Alla M. Logvinova
• Keywords: Pyrope; Xenolith

Volatile components in diamonds, associated garnet (pyrope), and olivine from two extremely rare xenoliths of diamondiferous peridotites recovered the Udachnaya kimberlite pipe Yakutia, Russia, were analyzed by gas chromatography–mass spectrometry (GC–MS) using a Focus DSQ II Series Single Quadrupole GC–MS (Thermo Scientific, USA). These are pyrope lherzolite dunite based upon compositions coexisting minerals. Unlike lherzolite, which contained with moderate calcium (Ca)-component content (about 15 mol%), subcalcic chromium (Cr)-pyrope low Ca-component (less than 10 mol%). All investigated minerals dominating hydrocarbons their derivatives represented aliphatic (paraffins, olefins), cyclic (naphthenes, arenes), oxygenated (alcohols, ethers), heterocyclic (dioxanes, furans) hydrocarbons; nitrogenated, chlorinated, sulfonated compounds; carbon dioxide (CO2); water (H2O). The relative concentration (rel%) total hydrocarbon was 79.7 rel% for 69.1 garnet, 92.6 olivine, general amount ranging 161 to 206. New data on volatiles suggest presence wide spectrum along nitrogen (N2), CO2, H2O some upper mantle areas.