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, Osnic basaltic andesite (AO) and Jezevica andesite (AJ) - Santonian-Campanian, Valja Strz 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.Gornjokredni Timocki magmatski kompleks (TMK) razvijen je na kontinentalnoj kori izgradjenoj od razlicitih stena proterozojske do donjokredne starosti. U TMK se mogu izdvojiti sledece magmatske svite: Andeziti Timoka (AT) - turon-santon, Epiklastiti Metovnice (EM) - konijak-kampan, Andezitbazalti Osnica (AO) i Andeziti Jezevice (AJ) - santon-kampan, Plutoniti Valja Strz (PVS) - kampan i Latiti Boljevca (LB). Sedimentni procesi i vulkanizam u TMK kontinuirano traju kroz celu gornju kredu. Sedimentacija traje od alba do mastrihta, a magmatizam kontinuirano 10 miliona godina i to od gornjeg turona do gornjeg kampana. Vulkanski front, u toku vulkanizma, migrira od istoka ka zapadu, a vulkanizam karakterise dominacija ekstruzivnih vulkanskih facija u odnosu na eksplozivne i intruzivne, velike kolicine emitovanog vulkanskog materijala, ceste promene sredina deponovanja, velike facijalne razlike i ogromne kolicine sin- i post-eruptivno resedimentovanih vulkanoklasticnih naslaga. PR Projekat Ministarstva nauke Republike Srbije, br. 146013B