naa a22 4500 510736130 CHVBK 20180411083010.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1134/S1075701513050061 doi (NATIONALLICENCE)springer-10.1134/S1075701513050061 Structure of magnetite lodes at the Estyunino iron deposit in the central Urals [Elektronische Daten] [V. Rudnitsky, K. Aleshin, A. Kuznetsov, V. Ivanchenko] The structure of magnetite lodes is determined by iron and sulfur distribution, as well as texture and structure of ore. These features have been revealed by documentation of cores from ore intervals in exploration boreholes penetrating two main lodes 21 and 22 of the Estyunino iron deposit. The documentation of cores was accompanied by sampling for microscopic examination of texture and structure of ore and selection of Fe and S contents in ore. Then these data were summarized as sections of the lodes. It was established that the structure of magnetite lodes is characterized by conformable ore layers distinguished by texture, structure, and Fe and S contents. Banded and spotty ores containing less than 50% magnetite are predominant. Layers of homogeneous massive ore are infrequent. The textural pattern indicates a volcaniclastic nature of host rocks. The spotty texture is characteristic of hyaloclastites with vitreous shards. The banded texture with oriented distribution of fiamme is inherent to volcaniclastic rocks. In both cases, magnetite selectively replaces dark-colored vitreous fragments and is also dispersed in the salic matrix and lava fragments. No indications of crosscutting superposed relationships are observed. The available data can be satisfactorily explained by an impregnation-metasomatic mode of ore deposition. Pleiades Publishing, Ltd., 2013 Rudnitsky V. Ural State Mining University, ul. Kuibysheva 30, 620144, Yekaterinburg, Russia aut Aleshin K. Ural State Mining University, ul. Kuibysheva 30, 620144, Yekaterinburg, Russia aut Kuznetsov A. Zavaritsky Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Pochtovyi per. 7, 620075, Yekaterinburg, Russia aut Ivanchenko V. Institute of Geophysics, Ural Branch, Russian Academy of Sciences, ul. Amundsena 100, 620016, Moscow, Russia aut Geology of Ore Deposits Springer US; http://www.springer-ny.com 55/6(2013-11-01), 467-481 1075-7015 55:6<467 2013 55 11477 https://doi.org/10.1134/S1075701513050061 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1075701513050061 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rudnitsky V. Ural State Mining University, ul. Kuibysheva 30, 620144, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Aleshin K. Ural State Mining University, ul. Kuibysheva 30, 620144, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Kuznetsov A. Zavaritsky Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences, Pochtovyi per. 7, 620075, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Ivanchenko V. Institute of Geophysics, Ural Branch, Russian Academy of Sciences, ul. Amundsena 100, 620016, Moscow, Russia aut NATIONALLICENCE 773 0- Geology of Ore Deposits Springer US; http://www.springer-ny.com 55/6(2013-11-01), 467-481 1075-7015 55:6<467 2013 55 11477 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer