Successive, isothermal hydrocarbon migration events recorded by fluid inclusions in fracture-filling quartz of the Szeghalom dome (SE Hungary)

Schubert Félix and M. Tóth Tivadar: Successive, isothermal hydrocarbon migration events recorded by fluid inclusions in fracture-filling quartz of the Szeghalom dome (SE Hungary). In: Acta mineralogica-petrographica, (44). pp. 9-17. (2003)

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Abstract

The largest sub-basin in the south-eastern part of the Pannonian Basin is the Békés Basin (BB). The BB is surrounded by metamorphic and magmatic basement highs, which produce considerable amount of petroleum due to their high fracture porosity. One of the most intensively explored basement highs is located on the northern margin of the BB, called Szeghalom Dome (SzD). Former studies revealed remnants of an ancient hydrocarbon migration event preserved as fluid inclusions in the fracture-filling, idiomorphic quartz crystals of the SzD. This quartz phase occurs in 6 wells in the central part of the dome. The several growth zones suggest that the quartz phase is the product of a successive cementation process. Two markedly different petroleum inclusion types could be distinguished along the growth zones characterised by different colours, vol. % of the gas phase and fluorescence emission. Simultaneously with the HC inclusions also aqueous inclusions occur in lower quantity and rather unequal spatial distribution. The appearance of the different petroleum inclusions shows a well-defined temporal and spatial distribution during the HC-bearing fluid migration in the SzD. Based on co-genetic aqueous inclusions the quartz cementation preceded at isothermal conditions and decreasing salinity, while the HC-bearing fluid turned into a lower density (higher maturity?) type.

Item Type: Article
Heading title: Articles
Journal or Publication Title: Acta mineralogica-petrographica
Date: 2003
Volume: 44
ISSN: 0365-8066
Page Range: pp. 9-17
Language: English
Publisher: Department of Mineralogy, Geochemistry and Petrology, University of Szeged
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39425/
Uncontrolled Keywords: Földtan, Ásványtan, Kőzettan
Additional Information: Bibliogr.: 17. p. ; ill. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2022. Aug. 22. 12:48
URI: http://acta.bibl.u-szeged.hu/id/eprint/25103

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