Iron-manganese mineralization in Eocene deposits of Parashka skyba (Skybov nappe, Ukrainian Carpathians)

Formulation of the problem. Modern advances in oceanographic studies sedimentogenesis and orogenesis open up opportunities for in-depth study rocks by fold-nappe systems, including Carpathian region. Review previous research. On territory Carpathians flysch complexes researchers have mainly noted findings carbonates manganese iron nodules.At same time, contain iron-manganese oxide mineralization. The purpose work was to mineral chemical composition, morphological types aggregates origin mineralization (IMM) among Eocene deposits Parashka skyba Skybov nappe middle course river Opir. Methods used: Sedimentological, mineralogical, petrogeochemical X-ray diffractometric analyzes wall ore minerals. Results: is associated with Paleocene transition strata, which represented coarse-grained turbidites grainites Yamna suite variegated fine- medium-grained hemipelagites Manyava suite. IMM are deposited a main bed, crusts scattered rocks. It synchronously sedimented deep-water lower bathyal. оre bed composited concretionary, sinter, brecciated, earthy sooty aggregates. Concretionary morphotypes concentric-zonal structure, formed shells different composition structural features. Crystalline secretions observed nucleus. substance amorphous compounds hydroxides, minerals hydrothermal (pyrolusite, psilomelan, todoroquite bersenite) hydrogenic (vernadite, buserite) origin. Shells often columnar, dendrіtic colomorphic structures typical formations. Differentiation causes significant fluctuations metal contents (from 3 11.5% Fe oxides from 2 10% Mn) host 1.4 0.12 12% Mn). This confirms endogenous ore-bearing fluids. diagram ratios components formations zones modern oceans E. Bonatti, geochemical Nad’yamne horizon falls into fields both hydrothermal-hydrogen Mineralogical features indicate that source metals on seabed were vents. Direct deposition phases hydroxide metal-enriched bottom waters occurred as result reaction fluids seawater. formation functioning system likely caused intensification tectonic movements Laramian phase Paleocene-Eocene boundary, also led restructuring deepening paleobasin. An important role these processes played faults foundation, served channels circulation hot heat could be deep magma, according authors. Scientific novelty. Iron-manganese characterized first morphotypes, structural-textural, mineralogical sedimentation petrographic content described. studied make it possible propose model formation. Practical significance. correlate well recent pelagic sedimentation. presence expands cognitive aspects Outer basin Tethys Ocean will contribute other horizons their specialization.