Magnetic microphases in chrome-spinels from alpine-type ultramafic rocks, Central Urals / Sherendo T.A., Mitrofanov V.Y., Martyshko P.S., Vazhenin V.A., Pamyatnykh L.A., Alekseev A.V. // Doklady Earth Sciences. - 2014. - V. 456, l. 1. - P. 563-566.

ISSN:
1028334X
Type:
Article
Abstract:
The ore and accessory chrome-spinels from metamorphosed dunites of the Cr-bearing Klyuchevskoi alpine-type ultramafic massif are studied. As a result of use of thermomagnetic analysis in the range of 4-900 K, magnetic resonance spectroscopy, and magnetic-force microscopy, secondary magnetic Fe 3+-enriched microphases chaotically distributed in the primary nonmagnetic mineral were revealed for the first time in accessory chrome-spinels. It was established that the metamorphosed accessory chrome-spinels produce the magnetic properties of the host rocks and the primary nonmagnetic chrome-spinels forming ore bodies remains almost unaltered. This originates the contrast of magnetic properties between the ore body and host rocks and provides the geomagnetic anomaly in the ore-hosting zone. © 2014 Pleiades Publishing, Ltd.
Author keywords:
Index keywords:
Magnetic properties; Magnetic resonance spectroscopy; Ore deposits; Chrome-spinels; Host rocks; Microphases; Nonmagnetics; Ore bodies; Thermomagnetic analysis; Ultramafic massifs; Ultramafic rocks; Ge
DOI:
10.1134/S1028334X14050195
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Link https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902975959&doi=10.1134%2fS1028334X14050195&partnerID=40&md5=65789fcbc83296df1749cb2448820d15
Affiliations Bulashevich Institute of Geophysics, Ural Branch, Russian Academy of Sciences, ul. Amundsena 100, Yekaterinburg 620016, Russian Federation; Institute of Metallurgy, Urals Branch, Russian Academy of Sciences, ul. Amundsena 101, Yekaterinburg 620016, Russian Federation; Ural Federal University, ul. Lenina 51, Yekaterinburg 620083, Russian Federation; Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Pochtovyi per. 7, Yekaterinburg, Russian Federation
Funding Details 12-P-5-2015, RAS, Russian Academy of Sciences
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Correspondence Address Martyshko, P.S.; Bulashevich Institute of Geophysics, Ural Branch, Russian Academy of Sciences, ul. Amundsena 100, Yekaterinburg 620016, Russian Federation
Publisher Maik Nauka-Interperiodica Publishing
Language of Original Document English
Abbreviated Source Title Dokl. Earth Sci.
Source Scopus