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Information × Registration Number 0226U000976, (0121U109054) , R & D reports Title Aplite-pegmatoid granites of the Ukrainian Shield: geochemistry, geochronology and ore potential popup.stage_title Апліт-пегматоїдні граніти Українського щита: геохімія, геохронологія та рудоносність Head Stepaniuk Leonid M., Доктор геологічних наукSukach Vitalii V., Доктор геологічних наук Registration Date 19-01-2026 Organization M. P. Semenenko Institute of geochemistry, mineralogy and ore formation popup.description1 Development of mineralogic-geochemical, metallogenical, petrochemical and isotope-cheochemical criteria of ore potential of the aplite-pegmatoid granites within different blocks of the Ukrainian Shield popup.description2 The age ranges of aplite–pegmatoid granites (APG) have been established (Ma): Volyn tectonic domain — Osnytskyi Complex: 1968–1970; Zhytomyr Complex: 2038–2078; Dnister–Buh tectonic domain: 1981–2039; Ros–Tikych tectonic domain: 2025–2036; Middle Dnieper tectonic domain: 2700–2854; W Azov domain: 2893–3300. Based on the K₂O/(Na₂O + K₂O) ratio, the APG of the Ukrainian Shield (USh) belong to the Na–K subalkaline series. They have a high SiO₂ (70.12–74.65 wt%) and elevated agpaitic index values (AI = 0.59–0.71). The highest AI = 0.71, increased TiO₂ (0.51 wt%), and low Al₂O₃ (11.26 wt%) are in the Lypniazka granites of the Shpola–Tashlyk tectono-ore region, which are genetically associated with lithium pegmatite deposits. In contrast, the APG of the Pobuzhzhia U-ore district (Zavallia and Khmilnyk REE–U–Th occurrences) are characterized by elevated aluminosity, reflected in high Al₂O₃ contents (14.81–15.40 wt%), as well as increased Na₂O + K₂O (9.2–9.3 wt%). On the SiO₂–K₂O×100/(K₂O + Na₂O) and K₂O/Na₂O–SiO₂ diagrams, the APG are within the S-type granite field. REE in the APG are characterized by crustal-level of light lanthanides and mantle-like ones of heavy ones, indicating a mixed crust–mantle composition of the magmatic–hydrothermal fluids responsible for the APG formation. The genetic types of ore-bearing metasomatites are controlled by the geochemical specialization of the granites and the composition of the host metamorphic rocks. Contacts between granites and amphibolites give rise to Mo-bearing metasomatites; interactions with carb rocks produce Sch-bearing skarns; contacts with Gr-bearing gneisses result in REE–U–Th mineralization; and interactions with metapelitic rocks lead to lithium mineralization. Geological and structural APG associatiations: (a) in the W part of the USh—nodes formed by the intersection of NW- and NE-trending fault systems; and (b) in the central and E parts—nodes defined by the intersection of sublatitudinal, NW-, and NE-trending Product Description popup.authors Stepanyuk Leonid Mykhaylovych Kovtun Oleksandr V. Shumlyanskyy Leonid V. Donskyi Mykola O. Oleg V. Ziultsle Sukach Vitalii V. Kseniia V. Rudenko Volodymyr O. Somka Maria M. Reshetnyk Ісаков Леонід Васильович Andrew M. Baran Serhii M. Bondarenko Leonid V. Shpylovyi Anna Radchenko Kateryna V. Vovk Viktor O. Kuts Vitalii Sydorchuk Dovbush Tetiana I. Oleksandr B. Vysotskyi Iryna M. Kotvitska Yevhen Mironets Vitalii Pryvalov Kalinichenko Tetiana H Kanunikova Lidiia I. Zagorodniy Vjacheslav V Bondarenko Olena Borysivna Kotenko Maksym S. Hurin Volodymyr H. Artur Stepanenko Sergii Kurylo Fihura Liubov A. Yurii Khomych Nataliia O. Kovalenko Viktor Kudryk popup.nrat_date 2026-01-19 Close