Structural and magnetic microinhomogeneities in accessory spinel of the system Fe2+(Cr2-xFex3+)O-4 from the Kytlym massif (Urals platinum-bearing belt) / Sherendo T. A.,Martyshko P. S.,Moloshag V. P.,Garaeva A. A.,Zamyatin D. A.,Mitrofanov V. Ya.,Pamyatnykh L. A. // RUSSIAN GEOLOGY AND GEOPHYSICS. - 2012. - V. 53, l. 9. - P. 853-860.

ISSN/EISSN:

1068-7971 / нет данных

Type:

Article

Abstract:

The microstructure and magnetic properties of accessory Fe-Cr-spinels from the Kytlym massif of the Urals platinum-bearing belt were studied. Atypical Fe-Cr-spinels in the form of magnetic microareas in grains of primary nonmagnetic Fe-Cr-spinel have been revealed for the first time in the bed dunites of the Kytlym multiphase concentrically zoned massif, North Urals. These spinels are responsible for the magnetic properties of the dunites. It has been established that the microareas are separations in solid solution Fe2+(Cr2-xFex3+)O-4 , which are enriched in Fe3+ and are probably an intermediate product of the transformation of primary accessory Fe-Cr-spinel during the formation of the dunite massif. These are magnetic microphases with particular chemical composition, cation distribution, and corresponding reversed crystal lattice, which determine the main magnetic properties of the microarea: the magnitude and direction of magnetization vector and Curie temperature. The formation of this earlier unknown type of magnetic Fe-Cr-spinel is probably conjugate with the formation and concentration of PGE mineralization in the bed dunites of the Kytlym platinum-bearing massif. The presence of such magnetization carriers in rocks and ores must be taken into account in geophysical research at the Urals chromite and platinum-chromite deposits. (C) 2012, V. S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B. V. All rights reserved.

Author keywords:

Fe-Cr-spinel; magnetization carrier; structural microinhomogeneity; microphase; dunite; Urals platinum-bearing belt DOMAIN-STRUCTURE; PYRRHOTITE

DOI:

10.1016/j.rgg.2012.07.002

Web of Science ID:

ISI:000308693300002

Соавторы в МНС:

Другие поля

Поле	Значение
Month	SEP
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	DOMAIN-STRUCTURE; PYRRHOTITE
Research-Areas	Geology
Web-of-Science-Categories	Geosciences, Multidisciplinary
Author-Email	Tatyana\_Sherendo@mail.ru
ResearcherID-Numbers	Martyshko, Peter/R-5902-2016 Pamyatnykh, Lidia/C-7780-2017
ORCID-Numbers	Pamyatnykh, Lidia/0000-0001-5044-0838
Number-of-Cited-References	35
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	32
Journal-ISO	Russ. Geol. Geophys.
Doc-Delivery-Number	004PJ