Middle Miocene zeolite-bearing turbidites, Abrămuţ Basin (Pannonian Basin), NW Romania

Authors

  • Ana-Voica Bojar Dept. of Geology, Salzburg University, Hellbrunnerstrasse 34, A-5020, Salzburg, Austria
  • Victor Barbu Exploration Division, OMV-Petrom S.A., 22 Coralilor street, Bucharest, Zip Cod 013329
  • Hans-Peter Bojar Dept. of Mineralogy, Studienzentrum Naturkunde, Universalmuseum Joanneum, Weinzöttlstrasse 16, A-8045, Graz,

DOI:

https://doi.org/10.7306/gq.1020

Keywords:

Early Badenian, foraminifera, borehole, tuffs, zeolite facies, XRD, Abrămuţ Basin

Abstract

Detailed lithostratigraphic data from a borehole in the Abrămuţ Basin, located in the northwestern part of Romania, has revealed the presence of turbiditic deposits containing several layers with tuff/tuffaceous materials in the lower Badenian. The age of these deposits is determined by the presence of the foraminifera Praeorbulina glomerosa and Orbulina suturalis. Detailed quantitative and qualitative X-ray diffraction data (XRD) on 10 different tuff layers situated at depths between 2450 and 2640 m show a mineralogical association comprising analcime, quartz, volcanic glass, smectite, mica, calcite, K-feldspar, glass and minor quantity of chlorite and albite. The presence of analcime suggests that the albite isograd for the interval studied has been never reached and the maximum temperatures have been lower than c. 125°C since the early Badenian. 

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Published

2012-05-08

Issue

Vol. 56 No. 2 (2012)

Section

Articles

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