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Results of AMT Survey at Patomsky Crater
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 73rd EAGE Conference and Exhibition incorporating SPE EUROPEC 2011, May 2011, cp-238-00497
- ISBN: 978-90-73834-12-5
Abstract
There is unique geological structure in the Earth, situated at far mountain area covered by heavy bush at East Siberia. The name of this geological structure is Patomsky Crater, which has been discovered during routine geological survey in 1949 by Russian geologist V.V. Kolpakov. Patomsky Crater is situated about 200 km to northeast from Baikal Lake at east part of Irkutsk region. Since it discovery three geological expeditions in 2005 – 2008 were curried out to discover the nature of the crater. As only helicopter is the available transport to this area application of geophysical equipment was very limited. Fourth expedition carried out in august 2010 has 7 sets of AMT equipment, enough to provide in short time AMT profile, which crosses the Patomsky Crater in the direction orthogonal to the structure of hosting Proterozoic rocks. 2-D inversion of TE and TM curves as well as tipper data has been done. AMT data show the Craters body has high resistivity at upper several hundred meters depth. This body breaks metamorphosed and folded Proterozoic host rocks. The tipper and real induction vectors data were very useful to determine complicate 3-D structure of area.