IDENTIFICATION AND VALUATION OF PARAMAGNETIC RADICALS IN NATURAL DOLOMITES AS AN INDICATOR OF GEOLOGICAL EVENTS

dc.contributor.author	Franco R.W.A.
dc.contributor.author	Pelegrini F.
dc.contributor.author	Rossi A.M.
dc.date.accessioned	2022-02-10T07:21:53Z
dc.date.available	2022-02-10T07:21:53Z
dc.date.issued	2003
dc.description.abstract	Geological sedimentary dolomite samples from the Superior Proterozoic are studied using electron paramagnetic resonance (EPR) spectroscopy. The complex spectra in the g=2.0 region is composed of Mn2+ lines and signals due to crystallization and radiation-induced defects. Measurements in microwave frequencies of 9.5 GHz (X-band) and 35 GHz (Q-band), and thermal and/or radiation treatments allowed identification of seven paramagnetic radicals in the g=2.0 region: (1) isotropic organic radical; (2) axial SO2-; (3) axial PO20 or PO22-; (4) isotropic CO2-; (5) axial CO2-; (6) axial CO33-; (7) isotropic unknown line. The use of these paramagnetic centres as indicators of geological events is discussed.
dc.identifier	https://elibrary.ru/item.asp?id=1386111
dc.identifier.citation	Physics and Chemistry of Minerals, 2003, 30, 1, 39-43
dc.identifier.issn	0342-1791
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/35172
dc.subject	DOLOMITE
dc.subject	EPR
dc.subject	GAMMA RADIATION
dc.subject	DEFECTS
dc.subject	Proterozoic
dc.subject.age	Precambrian::Proterozoic
dc.subject.age	Докембрий::Протерозой	ru
dc.title	IDENTIFICATION AND VALUATION OF PARAMAGNETIC RADICALS IN NATURAL DOLOMITES AS AN INDICATOR OF GEOLOGICAL EVENTS
dc.type	Статья

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