Modelling the coupling between salt kinematics and subsidence evolution: Inferences for the Miocene evolution of the Transylvanian Basin

Heat flow modelling in the Transylvanian basin: Implications for the evolution of the intra-Carpathians area

“…After the Early Badenian marine transgression, gradual basin deepening (Filipescu and Gîrbacea, 1997) and regional deposition of the rhyolitic Dej Tuff Complex (~14.4 Ma, de Leeuw et al, 2013, Seghedi andSzakács, 1991), a regional eustatic sea-level drop led to the deposition in average of 200-300 m thick evaporites, mostly salt (Fig. 3, e.g., de Leeuw et al, 2010;Tilita et al, 2015). The subsidence continued with the deposition of almost 3.5 km of Upper Badenian -Pannonian sediments, typically fan-delta clastics organized in cycles driven by local tectonic or regional eustatic events (Fig.…”

“…( 4) and ( 6). The salt was left out of the transient model and was replaced by Badenian sediments because at the time of deposition the salt was only 200-300 m thick (Krézsek and Bally, 2006;Tilita et al, 2015). Such a small thickness does not influence significantly the transient heat flow (Andreescu et al, 2002).…”

Hydrothermal injection breccia with organic carbon and nitrogen in the fossil hydrothermal system of Harghita Bãi, East Carpathians, Romania: an example of magmatic and non-magmatic element mobility in the upper continental crust

“…The presence of mud volcanoes and seepage across the back-arc continental 'sag' basin of Transylvania (Tiliţă et al 2013(Tiliţă et al , 2015 resulted from active compressional tectonics perturbing deep natural gas and petroleum reservoirs, where the Neogene volcanism (from Late Miocene to Quaternary times) caused a heat flow increase and simultaneous basin uplift, reaching temperatures of 200 °C at depths shallower than 3000 m, where most gas reservoirs are located in the eastern Transylvania basin margin (Krézsek et al 2010). The gas structures close to the Neogene volcanic chain contain higher concentrations of CO 2 (up to 90 %), N 2 (up to 60 %) and He (up to 5 %) (Filipescu & Huma, 1979).…”