Upper cretaceous magmatic suites of the Timok magmatic complex

Abstract

The Upper Cretaceous Timok Magmatic Complex (TMC) developed on a continental crust composed of different types of Proterozoic to Lower Cretaceous rocks. The TMC consists of the magmatic suites: Timok andesite (AT) - Turonian-Santonian, Metovnica epiclastite (EM) - Coniacian-Campanian, Osnić basaltic andesite (AO) and Ježevica andesite (AJ) - Santonian-Campanian, Valja Strž plutonite (PVS) - Campanian and Boljevac latite (LB). The sedimentary processes and volcanic activity of the TMC lasted nearly continuously throughout nearly the whole Late Cretaceous. The sedimentation lasted from the Albian to the Maastrichtian and the magmatism lasted for 10 million years, from the Upper Turonian to the Upper Campanian. The volcanic front migrated from East to West. The volcanic processes were characterized by the domination of extrusive volcanic facies, a great amount of volcanic material, a change in the depositional environment during the volcanic cycle, sharp facial transitions and a huge deposition of syn- and post-eruptive resedimented volcaniclastics

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

“…The observations and data resulting from the investigations of the logs from Nikoličevo (anď Cukaru Peki), allow us, first, to distinguish two subgroups among the first phase andesites, and second, to use their petrological differences in order to derive new implications on the link between magmatism and metallogeny. Note that we provide our arguments by investigating extrusive volcanic facies instead of intrusions; namely, in line with previous studies (e.g., [8,9,13,[17][18][19]25,34,50]), we argue that the occurring volcanic rocks sufficiently reflect the fertility of their non-exposed intrusive counterparts.…”

“…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. The Late Cretaceous volcanic rocks are exclusively represented by andesite of the first phase, which is called 'Timok andesite' [48].…”

“…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. The Late Cretaceous volcanic rocks are exclusively represented by andesite of the first phase, which is called 'Timok andesite' [48]. However, we recognize two different subgroups of these rocks, which systematically differ in their stratigraphic position and petrography, and as it will be shown below, in age and in their link to mineralization.…”

Tectonic, magmatic, and metallogenic evolution of the Late Cretaceous arc in the Carpathian‐Balkan orogen

“…The volcano‐sedimentary basins east of Sofia cover the entire time span between Late Turonian and the end of Campanian (92–72 Ma) [ Popov et al , ]. Sedimentation of volcaniclastic material in the Timok segment west of Sofia starts in the Turonian and ends before the deposition of Late Campanian to Maastrichtian clastic and reefal sediments [ Banješević , ]. These biostratigraphic constraints agree with the ~90 to 79 Ma age interval for igneous rocks associated with the volcaniclastic basin in the eastern part of the Timok segment [ Kolb , ].…”

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

“…Regional geology and geochronology of the Bor metallogenic zone and the Timok magmatic complex (TMC), the largest area of preserved volcanic rocks in the ABTS belt ( Fig. 1), have been summarized by Antula (1909), Schumacher (1954), Janković (1977), Von Quadt et al (2002), Banješević (2010), Gallhofer et al (2015), Jelenković et al (2016), and Knaak et al (2016). Neoproterozoic and Paleozoic metamorphic rocks constitute the basement of the TMC, which is deformed and overlain by Jurassic to Early Cretaceous limestones and sandstones.…”