Upper Cretaceous volcanoclastic-sedimentary formations in the Timok Eruptive Area (eastern Serbia): new biostratigraphic data from planktonic foraminifera

Abstract

Abstract:The biostratigraphy of the Upper Cretaceous volcanoclastic-sedimentary formations cropping out in the Timok

Silicate-replacive high sulfidation massive sulfide orebodies in a porphyry Cu-Au system: Bor, Serbia

“…2). The Bor conglomerate contains rounded clasts of basement gneiss, andesite with kaolinite alteration, and limestone and marls of Campanian to Maastrichtian age (~72-66 Ma) based on planktonic (Lips et al 2004;Lerouge et al 2005;Von Quadt et al 2007;Zimmerman et al 2008;Kolb 2011) foraminifera (Janković et al 2002;Ljubović-Obradović et al 2011). To the south of Bor, conglomerates made up of mineralized clasts constitute the deposit of Novo Okno, with clasts of covellite + pyrite in the lower part, chalcopyrite + bornite in the middle, and pyrite + chalcopyrite on top and at the periphery of the deposit (Antonijević 2011), representing an inverted sequence observed within the massive sulfide bodies at Bor and indicating exposure and erosion of the deposit by Late Cretaceous time.…”

“…To the south of Bor, conglomerates made up of mineralized clasts constitute the deposit of Novo Okno, with clasts of covellite + pyrite in the lower part, chalcopyrite + bornite in the middle, and pyrite + chalcopyrite on top and at the periphery of the deposit (Antonijević 2011), representing an inverted sequence observed within the massive sulfide bodies at Bor and indicating exposure and erosion of the deposit by Late Cretaceous time. Outside the mine area, the conglomerates are overlain by Maastrichtian sandstone and claystone with Gansserina Gansseri, which defines their youngest age as Maastrichtian (Ljubović-Obradović et al 2011), indicating exposure of the Bor deposit some 10-15 Ma after its formation.…”

New Constraints on the Main Mineralization Event Inferred from the Latest Discoveries in the Bor Metallogenetic Zone (BMZ, East Serbia)

“…All the studied drill-cores exhibit a similar lithology consisting of a complex series of Late Cretaceous volcanic, volcano-sedimentary and sedimentary rocks. The Late Cretaceous sedimentary rocks are represented by the Bor Clastics Formation and Oštrelj Formation [47]. Deeper parts of the Oštrelj Formation exhibit transitions to epiclastic rocks of the Metovnica Formation [48] that is composed of polymictic andesite breccia, volcaniclastic conglomerate and sandstone; the matrix of these sediments often contains reddish marls.…”

Assessment of karst geomorphosites on Kučaj and Beljanica mountains as a resource for the development of karst-based geopark

“…They represent a part of the old crystalline basement and are transgressively overlain by a Paleozoic succession with clastites, metamorphites and igneous bodies. Marine sedimentation started in the area during the Middle Jurassic, characterized by the accumulation of terrigenous and carbonate sediments (Carević et al 2011). The Upper Jurassic is built up mostly of reef limestones conformably overlain by Cretaceous carbonate deposits.…”

“…During the Late Jurassic-Early Cretaceous, a large part of the Getic domain consisted of shallow-water carbonate deposits (the Getic carbonate platform) preserved in the greatest area of Kučaj Mt. They are unconformably overlain by Albian sandstones and Upper Cretaceous volcanoclastic-sedimentary Timok Group of Formations (Ljubović-Obradović et al 2011). The Tertiary sedimentary cover is composed of Neogene lacustrine deposits (Fig.…”