DOI: https://doi.org/10.24028/gzh.0203-3100.v40i3.2018.137170

Unique basite-metabasite structures of the Pobuzhsky ore mining region, their geological significance and ore-bearing prospects (by geophysical and geological data)

O.B. Gintov, V. Entin, S. V. Mychak, V. N. Pavlyuk, S. I. Guskov

Abstract


The structure and prospects for ore content of three basite-metabasite massifs of the Pobuzhsky ore mining district — Bandurovsky, Troyan and Tarasovsky are considered using the example of the Tarasovska structure of the Middle Bug River of the Ukrainian Shield (USh). The assumption suggested by geologists back in 1990 about the geological and metallogenic uniqueness of these massifs is confirmed by the analysis of both regional geophysical surveys and materials of detailed geophysical works performed within the Tarasovska structure (basite-metabasite massif) in 2017 in connection with the geological-search works. It is shown that all three massifs are located within the epicentral regions of the largest gravity anomalies of the USh — Golovanevska and Bandurovska (68 and 49 mGal, respectively) — and they correspond to local maxima Dga with intensity up to 3—7 mGal against these anomalies. The most ancient enderbite-gneisses of the Yatransky and Khoshchevato-Zavalievsky blocks hosted the considered basite-metabasite massifs. The shape of the arrays is oval-concentric, that is why most geologists viewed them as brachisynclinal folds. According to the data of magnetometric and gravimetric surveys at a scale of 1 : 10,000 and small drilling volumes, the Tarasovska structure 3 ´ 5,5 km in size represents itself as a massif of apo-gabbroids — bipyroxene and amphibole-pyroxene crystal shales (in some places of norites and gabbros) of a clear oval shape surrounded by arcuate bands of skarnoids, garnet-bearing aluminous gneisses and calciphyres, bipyroxene and hypersthene crystal shales, among which for the first time manganese-containing gondites were encountered in the USh. Despite the presence of sedimentary cover overlapping the Tarasovska structure (Sarmatian and Quarterian deposits) of about 25—40 m thick, the massifs of apo-gabroids are distinguished on the background of the surrounding diurnal relief by distinct uplands with amplitude from several up to 10 m that supports the strength of these formations even on the background of enclosing granitoids. Geophysical, structural, petrological and geochemical data support the intrusive nature of the apogabbroids and the contact-metasomatic origin of their banding, rather than the brachisynclinal fold of metamorphosed sedimentary-volcanogenic rocks. The absence or very in-significant content of graphite gneisses in the framing structures of the Tarasovsky massif distinguishes these bands of gneisses, crystal shales and calciphyres from the sections of the Kosharo-Aleksandrovska and Khoshchevato-Zavalievsky suite of the Bug series with specific wide distribution of gneisses of graphite and biotite-graphite composition. The contact-metasomatic nature of the gneiss-crystal-shale-calciferous formations of the Tarasovo structure, as well as the possible metasomatic nature of the graphite and some other gneisses of the Middle Bug River, according to some researchers, raises the issue of the necessity of discussing and in-depth analysis of stratigraphic schemes of the Early Precambrian of the USh. The further direction of geological prospecting within the Tarasovska structure for apatite and titanium ores is discussed, and the most promising areas for the drilling of wells are also considered.


Keywords


Ukrainian Shield; Middle Bug River area; the Yatran block; metabasites; apatite ores; intrusions

References


Burachovich T. K.; Ilyenko V. A.; Kushnir A. M.; Shirkov B. I.; 2018. Three-dimensional deep geoelectric model of the Tarasivka structure of the Golovanivsk suture zone. Geofizicheskiy zhurnal; 40(2); 108—122 (in Ukrainian). doi: https://doi.org/10.24028/gzh.0203-3100.v40i2. 2018.128934.

Vinogradov G. G.; Paliy D. P.; 1971. Report on geological survey of scale 1 : 50 000 sheets M-36-121-B; M-36-122-A. Vol. 1. Kiev: Ukrgeolfond; 195 p. (in Russian).

Vinogradov G. G.; Paliy D. P.; Entin V. A.; Marinovich B. A.; 1976. Geological map of scale 1 : 50 000 territories of sheets M-36-122-B; G. Report GSP No.37. Vol. 1. Kiev: Ukrgeolfond; 185 p. (in Russian).

Gintov O. B.; 2005. Field tectonophysics and its applications in the study of deformations of the Earth’s crust of Ukraine. Kiev: Feniks; 572p. (in Russian).

Gintov O. B.; Dimitrov G. Kh.; 1960. Report on the work of Zavalievskaya; Golovanevskaya geophysical parties and the party of interpretation drilling. Vol. 1. Kiev: Ukrgeolfond; 183p. (in Russian).

Gintov O. B.; Entin V. A.; Isay V. M.; 1985. New data on the features of the formation of the folded structure of magnetite deposits in the Middle Bug River. Doklady AN USSR. Ser. B.; (4); 15—17 (in Russian).

Gintov O. B.; Entin V. A.; Muchak S. V.; Pavlyuk V. N.; Zyultsle V. V.; 2016. Structural-petrophysical and tectonophysical base of geological map of crystalline basement of the central part of Golovanevsk suture zone of the Ukrainian Shield. Geofizicheskiy zhurnal; 38(3); 3—28 (in Russian). doi: https://doi.org/10.24028/gzh.0203-3100.v38i3.2016.107777.

Gintov O. B.; Isay V. M.; 1988. Tectonophysical investigations of the faults of the consolidated cortex. Kiev: Naukova Dumka; 228 p. (in Russian).

State geological map of Ukraine. Scale 1 : 200 000. Geological map and map of minerals of the crystalline basement. Central-Orion series. Letter M-36-ÕÕÕ² (Pervomaysk). Kyiv: Ministry of Ecology and Natural Resources of Ukraine; State Geological Survey; 2004 (in Ukrai-nian).

State geological map of Ukraine. Scale 1 : 200 000. Geological map and map of minerals of the crystalline basement. Central-Orion series. Sheet M-35-ÕÕÕ² (Gayvoron). Kyiv: Ministry of Ecology and Natural Resources of Ukraine; State Geological Survey; 2010 (in Ukrainian).

Dobrokhotov M. N.; Gintov O. B.; Entin V. A.; Solonina I. N.; 1971. Report on the topic: “Generalization and reinterpretation of geological and geophysical materials on the Ukraini-an Shield to determine areas that are promising for iron”. Book1. Kiev: Ukrgeolfond; 412 p. (in Russian).

Dovgan R. N.; Zyultsle V. V.; Entin V. A.; 1989. Geological structure and minerals of the Zavalievsky geological region. Report on deep geological mapping of M-35-144-B sheet; together with geological survey of M-35-132-G sheet. Vol. 1. Kiev: Ukrgeolfond; 256 p. (in Russian).

Dovgan R. N.; Entin V. A.; Pavlyuk V. N.; 2006. Bandurovskaya paleovolcanic structure and associated prospects of diamondiferousness. Mineralnyye resursy Ukrainy; (4); 22—28 (in Russian).

Entin V. A.; 1987. Geological and structural features and predictive assessment of the resources of iron ore deposits (Ukrainian Shield) on geological and geophysical data and its possible endogenous nature: Abstract of thesis for the degree of candidate of geol.-min. sci. Kiev; 32 p. (in Russian).

Entin V. A.; Gintov O. B.; Mychak S. V.; Yushin A. A.; 2015a. The structure of the Moldovan iron ore deposit (the Ukrainian Shield) according to geological-geophysical data and its possible endogenous nature. Geofizicheskiy zhurnal; 37(4); 3—18 (in Russian). doi: https://doi.org/10.24028/gzh.0203-3100.v37i4.2015.111118.

Entin V. A.; Guskov S. I.; Orlyuk M. I.; Gintov O. B.; Osmak R. V.; 2015b. A map of absolute values for gravity fields of Ukraine and some aspects of its possible interpretation. Geofizicheskiy zhurnal; 37(4); 3—18 (in Russian). doi: https://doi.org/10.24028/gzh.0203-3100.v37i1.2015.111323.

Zyultsle V. V.; Vykhotsev M. K.; Fedorov A. V.; 2002. Geological structure and minerals of the inter-rivers of Southern Bug and Yatra. Report on the conduct of deep geological mapping scale 1 : 50 000 sheets M-36-122-V; M-36-134-A. Vol. 1. Kyiv: Ukrgelefond; 321 p. (in Ukrainian).

The study of the substance of metamorphic; ultrametamorphic; intrusive and metasomatic formations of the Precambrian basement in the Middle Bug River region; 1990. Report of the IGFM NASU on the contract with the Right-bank geological expedition for 1985—1990. Responsible executors I. B. Shcherbakov; V. V. Ryabokon. Kiev: Ukrgeolfond; 450 p. (in Russian).

Kostyuchenko V. S.; Zyultsle V. V.; Vykhodtsev N. K.; Fedorov A. V.; 1990. Geological structure and minerals of the Middle Bug River. Report on deep geological mapping of scale 1 : 200 000 sheets M-36-XXXI. T. 1. Kiev: Ukrgeolfond; 338 p. (in Russian).

Mangazov Sh. K.; 2006. A project to search for apatite and titanium-ilmenite ores on the Tarasiv and Trojan sites of the Kirovograd region. Manuscript. Right-bank geological expedition. 130 p. (in Ukrainian).

Mikhailov D. A.; 1983. Metasomatic origin of ferruginous Precambrian quartzites. Leningrad: Nauka; 168 p. (in Russian).

Nechaev S. V.; Semka V. A.; Bondarenko S. N.; Bugaenko V. N.; 1989. Tungsten skarns in the Rosin-Tikichsky area of the Ukrainian Shield. Doklady AN USSR. Ser. B. Geologicheskiye; khimicheskiye i biologicheskiye nauki; (11); 23—25 (in Russian).

Nechaev S. V.; 1990. Evolution of the processes of ore genesis in the structures of the Ukrainian Shield. Geologicheskiy zhurnal; (2); 68—80 (in Russian).

Pavlyuk V. M.; Bobrov O. B.; Vysotskyy B. L.; Dovgan R. M.; Zhovinskyy E. Ya.; Kostenko M. M.; Lykov L. I.; Tsymbal S. M.; 2008. Report on the topic “Geology; petrology; geochemistry; age and ore content of the mafite-ultramaphite associations of the western part of the UCH”. Books 1—6. Foundation of State Enterprise “Ukrainian Geological Company”. Kiev; 683 p. (in Ukrainian).

Serzhin V. I.; Singaevskaya E. I.; 1966. Results of detailed geophysical studies of the central part of the Golovanevskaya structure of the Middle Bug River. Report of the Ulyanovsk Geofizpartia for 1964—1965. Vol. 1. Kiev: Ukrgeolfond; 183 p. (in Russian).

Serzhin V. I.; Singaevskaya E. I.; Gintov O. B.; 1968. Results of complex geophysical studies to assess the prospects of searching for nickel ores in the Pobuzhsky nickel-bearing region. The report of the Ladyzhinsky Geofizparty 68/66-67 and the geophysical party 78/68. Vol. 1. Kiev: Ukrgeolfond; 219 p. (in Russian).

Slenzak O. I.; 1965. About the structure of the Ukrainian Precambrian (on the example of the southwestern part of the Ukrainian crystalline shield). Kiev: Naukova Dumka; 139 p. (in Ukrainian).

Slenzak O. I.; 1960. Charnokity of Transnistria and some general questions of petrology. Kiev: Publishing House of the Academy of Sciences of the Ukrainian SSR; 212p. (in Russian).

Sollogub V. B.; 1986. Lithosphere of Ukraine. Kiev: Naukova Dumka; 183 p. (in Russian).

Starostenko V. I.; Kuprienko P. Ya.; Makarenko I. B.; Savchenko A. S.; Legostaeva O. V.; 2015. Density heterogeneity of the Earth’s crust of the Ingul megablock of the Ukrainian Shield according to the data of three-dimensional gravity modeling. Geofizicheskiy zhurnal; 37(3); 3—21 (in Russian). doi: https://doi.org/10.24028/gzh.0203-3100.v37i3.2015.111089.

Stepanyuk L. M.; 2000. Geochronology of the Precambrian of the western part of the Ukrainian Shield (Archean-Paleoproterozoic): Author’s abstract. Dis. Dr. geol. sci. Kiev; 34 p. (in Ukrainian).

Fedorov A. V.; Likarchuk N. V.; Entin V. A.; 1984. Report on the results of complex geophysical and geochemical studies on the preparation of the M-36-XXXI sheet area and within the M-36-111-B; G sheets; -112-A; B; V. Vol. 1. Kiev: Ukrgeolfond; 295p. (in Russian).

Fedorov A. V.; Filonenko V. P.; 1983. Report on the results of complex geophysical and geochemical studies on the preparation of the basis for a 1 : 50 000 geological map of the Zavalievsky District of the Ush M-35-132-G; -144-B; M-36-121-B; -133-A. Vol. 1. Kiev: Ukrgeolfond; 237 p. (in Russian).

Shakina K. A.; Skakun L. Z.; 2010. Mineral composition and processes of formation of graphite-containing rocks of Zavalivsky graphite deposit: Abstracts of reports of the International scientific-practical conference “Stratigraphy; geochronology and correlation of the Lower-Precambrian rock complexes of the foundation of the East European Platform”. Kiev: UkrNIGRI; 252 p. (in Ukrainian).

Shimkiv L. M.; Entin V. A.; 1988. Seismic exploration results of the MOV—OGT within the Pervomaisky region of the Middle Bug country. Report of Seismic and Right Bank Geophysical Parties of the Kiev Integrated Geophysical Expedition. Kiev: Ukrgeolfond; 246 p. (in Russian).

Shcherbakov I. B.; 2005. Petrology of the Ukrainian Shield. Lviv: ZukKTS; 366 p. (in Russian).

Yurchishin A. P.; Solovey N. P.; 1989. The search for apatite in the western part of the Ukrainian Shield. Report of the Pobuzhskaya GRP of the Right-bank Geological Exploration Expedition for the years 1985—1989. Vol. 1. Kiev: Ukrgeolfond; 309 p. (in Russian).

Yushin A. A.; 2013. Metasomatic Carbonization and Ore Formation Processes in the Carboniferous Formations of the Early Precambrian of the Ukrainian Shield. Sbornik nauchnykh trudov Permskogo gosudarstvennogo natsionalnogo issledovatelskogo universiteta; (16); 159—167 (in Russian).

Yaroshchuk M. A.; 1983. Iron-ore formations of the Belotserkovsky-Odessa metallogenic zone (the western part of the Ukrainian Shield). Kiev: Naukova Dumka; 224 p. (in Russian).

Yaroshchuk M. A.; Yaroshchuk E. A.; 1989. Diafluorites of the southwestern margin of the Ukrainian Shield and their ore content. Geologiya rudnykh mestorozhdeniy; ÕÕÕ²(3); 74—81 (in Russian).