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MODELING OF THE TRIASSIC AND JURASSIC RIFTING IN THE SOUTHERN PART OF CENTRAL NORTH BULGARIA - IMPLICATIONS FOR THE SOURCE ROCK MATURITY

Nikola Botoucharov

First published: 2014-06-20https://doi.org/10.5593/sgem2014/b11/s6.095View metrics

Abstract

The geodynamic evolution of the study area, restored from numerous well section data, demonstrates increased tectonic and basin subsidence during Late Permian-Early Triassic, Late Triassic and Early Jurassic rifting phases as well as after Mid-Cimmerian compression. There is a distinct trend for higher burial rates and depths of sediments from central southern part of the Moesian Platform to the south towards the Balkan orogenic system. Although the extensional processes are very important for the tectonic subsidence, the Late Jurassic-Early Cretaceous deposition of very thick sedimentary complex affected the overall basin subsidence to a greater extent. The main objective of modeling is to quantify the extension of the lithosphere for rift phases and their importance for the burial and thermal maturity of the source rocks. Modeling allowed the possibility of multiphase rifting and different extension of the crust and subcrust lithosphere. Comparing the computed lithospheric deformation with the actual tectonic history of the basin allows a relatively accurate assessment of the validity and limitations of the underlying models. Based on the analysis of the obtained results it can be concluded that the thermal maturity trends of the Triassic and Jurassic sediments are determined by the Mesozoic geodynamic evolution of the study area with several rifting and compressional events.

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Title
MODELING OF THE TRIASSIC AND JURASSIC RIFTING IN THE SOUTHERN PART OF CENTRAL NORTH BULGARIA - IMPLICATIONS FOR THE SOURCE ROCK MATURITY
Authors
Nikola Botoucharov
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING
Publisher
Stef92 Technology
Year
2014
Pages
735-742
SWS Citekey
Botoucharov2014735742
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
Keywords
Central North BulgariaMoesian PlatformTriassic and Jurassic riftingtectonic subsidence modelingsource rock maturity
References10

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  7. Botoucharov N. Basin analysis and hydrocarbon generation evaluation of the Triassic sediments in the South Moesian Platform Margin (between Iskar and Yantra rivers), Abstract Dissertation, Sofia University, GGF, Bulgaria, 2011, 44 p.

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  9. Botoucharov N., Georgiev G., Sachsenhofer R. & Bechtel A. Source potential of Triassic sediments in the Southernmost Moesian Platform Central Zone, 7-10 June 2004, Paris, France, Extended Abstracts, Session Petroleum Systems, CD-ROM, P283, pp. 1-4, 2004.

  10. Botoucharov N. Thermal maturity of the Mesozoic sediments in the Central Southern part of the Moesian Platform, Zbornik na trudovi, Geologica Macedonica No. 3, Rep. of Macedonia, pp. 381-386, 2012.

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