Trace-element signatures and U-Pb geochronology of magmatic and hydrothermal titanites from the Petrovitsa Pb-Zn deposit, Madan region, Central Rhodopes (Bulgaria)

The current study presents new geochronological and geochemical data for the Petrovitsa Pb-Zn deposit, Central Rhodopes, South Bulgaria. Based on in-situ U-Pb dating of titanites from pegmatites skarnified mineralized marbles, it aims to provide insights into pegmatite formation their relation hydrothermal system in region. Titanite is an abundant accessory mineral skarns within Madan ore district. Commonly, associates with feldspars, epidote, clinopyroxene, chlorite, hematite, zircon, apatite, allanite monazite both lithologies. Crystal size varies 5 μm 600 μm. combined analytical approach revealed compositional age variations studied divided into: (i) early formed magmatic; (ii) later hydrothermal. magmatic crystals are characterized by mean Th/U 1.91, Lu/Hf averaging at 0.59, Dy/Yb 2.03. chondrite-normalized REE patterns show LREE dominance over HREE. average ƩREE 6548 ppm. have a 0.22, 1.20, 1.50. HREE content slightly prevails LREE. two times lower compared – 3388 Negative Eu-anomaly common types. LA-ICP-MS geochronology shows well-defined distinction titanites. calculated weighted 48.9±2.3 Ма, while pegmatite-hosted dated 39.2±1.5 Ma. yield 37.7±1.3 Data suggest emplacement Rhodope metamorphic complex during late Ypresian. Later fluids precipitated younger different signature.