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Title: STUDY OF THE ARGILLIZED (BENTONITIZED) DEPOSITS IN GURASADA AREA ? SOUTHER APUSENI MOUNTAINS, ROMANIA
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STUDY OF THE ARGILLIZED (BENTONITIZED) DEPOSITS IN GURASADA AREA ? SOUTHER APUSENI MOUNTAINS, ROMANIA
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1314-2704
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English
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20
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1.1
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This paper proves news about the argillized (bentonitized) deposits that are part of a complex distribution of volcanic rock types occurring in the Gurasada region. These are the oldest deposits of volcanic origin crops out in the Gurasada open pit. Above these are volcanic deposits of andesitic composition represented by pyroclastic breccias, rare tuff levels and lava flows. The site observations, petrographic, XRD, RAMAN spectroscopy and chemical analyses indicated the formation of the bentonite deposit by weathering of a vitroclastic tuff, probably of dacitic composition, belonging to a first (more felsic) eruptive stage consisting of Plinian-type explosive volcanism. Given that the cover deposits were Radiometric dating (K/Ar method) within a period of 69 to 80 million years ago, it is confirmed that these volcanoes belong to the laramic cycle (Senonian). Bentonite from Gurasada is of lower quality being exploited especially for the preparation of drilling fluids.
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conference
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20th International Multidisciplinary Scientific GeoConference SGEM 2020
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20th International Multidisciplinary Scientific GeoConference SGEM 2020, 18 - 24 August, 2020
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
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317-324
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18 - 24 August, 2020
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website
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cdrom
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6850
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Gurasada; Apuseni Mountains; bentonite; montmorillonite; volcanic
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