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Hydrogen and Carbon Groups in the Structures of Rock-Forming Minerals of Rocks of the Lithospheric Mantle: FTIR and STA + QMS Data

Authors
  • Babushkina, M. S.1
  • Ugolkov, V. L.2
  • Marin, Yu. B.3
  • Nikitina, L. P.1, 4
  • Goncharov, A. G.1, 4
  • 1 Russian Academy of Sciences, Institute of Precambrian Geology and Geochronology, St. Petersburg, 690950, Russia , St. Petersburg (Russia)
  • 2 Russian Academy of Sciences, Institute of Silicate Chemistry, St. Petersburg, 199155, Russia , St. Petersburg (Russia)
  • 3 St. Petersburg Mining University, St. Petersburg, 199106, Russia , St. Petersburg (Russia)
  • 4 St. Petersburg State University, St. Petersburg, 199034, Russia , St. Petersburg (Russia)
Type
Published Article
Journal
Doklady Earth Sciences
Publisher
Pleiades Publishing
Publication Date
Apr 01, 2018
Volume
479
Issue
2
Pages
456–459
Identifiers
DOI: 10.1134/S1028334X18040013
Source
Springer Nature
License
Yellow

Abstract

Using IR–Fourier spectrometry (FTIR) and simultaneous thermal analysis combined with quadrupole mass spectrometry of thermal decomposition products (STA + QMS), olivines and clinopyroxene from xenolites of spinel and garnet lherzolites contained in kimberlites and alkaline basalts were studied to confirm the occurrence of hydrogen and carbon within the structure of the minerals, as well as to specify the forms of H and C. The presence of hydroxyl ions (OH–) and molecules of crystal hydrate water (H2Ocryst) along with CO2, CH, CH2, and CH3 groups was detected, which remained within the structures of mantle minerals up to 1300°C (by the data of both techniques). The total water (OH–and H2Ocryst) was the prevailing component of the C–O–H system.

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