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Akademický článek

Internal stratification of two thick Ordovician bentonites of Estonia: deciphering primary magmatic, sedimentary, environmental and diagenetic signatures

Autor: Sven Siir, Toivo Kallaste, Tarmo Kiipli, Rutt Hints

Publikováno v: Estonian Journal of Earth Sciences, Vol 64, Iss 2, Pp 140-158 (2015)

Twenty-six samples from two major altered volcanic ash beds, Kinnekulle and BII Bentonite of the Kuressaare core section (K-3), Saaremaa Island, were explored to record the geochemical and mineralogical heterogeneity of beds. Signs of ash transport f

Externí odkaz: https://doaj.org/article/c75f6fff95ef42fe94df178426581ed4

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Akademický článek

Geochemical discrimination of the Upper Ordovician Kinnekulle Bentonite in the Billegrav-2 drill core section, Bornholm, Denmark

Autor: Tarmo Kiipli, Toivo Kallaste, Arne T. Nielsen, Niels H. Schovsbo, Sven Siir

Publikováno v: Estonian Journal of Earth Sciences, Vol 63, Iss 4, Pp 264-270 (2014)

The content of the trace elements Ti, Nb, Zr and Th has been analysed in 34 Upper Ordovician bentonites from the Billegrav-2 drill core, Bornholm, Denmark. The section contains two 80–90 cm thick bentonites, which potentially may represent the Kinn

Externí odkaz: https://doaj.org/article/99dbc5f41acd431483d78feb9e52387c

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Akademický článek

Geochemistry and correlation of volcanic ash beds from the Rootsiküla Stage (Wenlock–Ludlow) in the eastern Baltic

Autor: Tarmo Kiipli, Rein Einasto, Toivo Kallaste, Viiu Nestor, Helle Perens, Sven Siir

Publikováno v: Estonian Journal of Earth Sciences, Vol 60, Iss 4, Pp 207-219 (2011)

Nine altered volcanic ash samples from the shoal and lagoonal sediments of the Rootsiküla Stage (Wenlock–Ludlow boundary interval, Estonia) were analysed, compared and correlated with five samples of deep sea environments from Latvia. Volcanic ash

Externí odkaz: https://doaj.org/article/eda870a9fd7e43d6a944ddb08e8e7051

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Internal stratification of two thick Ordovician bentonites of Estonia: deciphering primary magmatic, sedimentary, environmental and diagenetic signatures

Autor: Tarmo Kiipli, Rutt Hints, Sven Siir, Toivo Kallaste

Publikováno v: Estonian Journal of Earth Sciences, Vol 64, Iss 2, Pp 140-158 (2015)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d92dfc9e7799c236c0ee6c215580c4f
http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2015/issue_2/earth-2015-2-140-158.pdf

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Geochemical variations within the mid-Silurian Grötlingbo Bentonite (Gotland, Sweden): discriminating between magmatic composition, ash transport fractionation and diagenetic effects

Autor: Mikael Calner, Toivo Kallaste, Sven Siir, Peter Dahlqvist, Tarmo Kiipli

Publikováno v: GFF. 134:273-282

This paper reports on the geochemistry of the mid-Silurian Grotlingbo Bentonite, a ca. 0.1–0.4-m-thick and regionally important bentonite bed in Sweden and the East Baltic area. A series of eight samples, spaced by 5 cm, were taken from the Hunning

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::31c66b1bd8aa1cee9c52fb19fb1b1fea
https://doi.org/10.1080/11035897.2012.759147

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Al2O3/TiO2 ratio of the clay fraction of Late Ordovician–Silurian carbonate rocks as an indicator of paleoclimate of the Fennoscandian Shield

Autor: Tarmo Kiipli, Toivo Kallaste, Enli Kiipli, Sven Siir

Publikováno v: Palaeogeography, Palaeoclimatology, Palaeoecology. :312-320

In the Fennoscandian Shield the fluctuations in arid–humid climate conditions are inferred from the Al2O3/TiO2 ratio of the clay fraction of Estonian carbonate rocks of the Baltoscandian sedimentary Basin. The Late Ordovician climate of the Fennosc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6cd09cbf1d50d55e6ceb1bb7a0608746
https://doi.org/10.1016/j.palaeo.2012.10.001

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Geochemical discrimination of the Upper Ordovician Kinnekulle Bentonite in the Billegrav-2 drill core section, Bornholm, Denmark; pp. 264–270

Autor: Niels H. Schovsbo, Toivo Kallaste, Arne Thorshøj Nielsen, Tarmo Kiipli, Sven Siir

Publikováno v: Estonian Journal of Earth Sciences. 63:264

The content of the trace elements Ti, Nb, Zr and Th has been analysed in 34 Upper Ordovician bentonites from the Billegrav-2 drill core, Bornholm, Denmark. The section contains two 8090 cm thick bentonites, which potentially may represent the Kinne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fecba24e39fe0f83080d737945a5f131
https://doi.org/10.3176/earth.2014.29

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Mean grain size fluctuations of the siliciclastic component in the Aizpute-41 core: implication for end-Ordovician glaciation; pp. 257–263

Autor: Enli Kiipli, Toivo Kallaste, Sven Siir, Tarmo Kiipli

Publikováno v: Estonian Journal of Earth Sciences. 63:257

The article deals with grain size distribution of the insoluble residue of Upper Ordovician carbonate rocks of the Baltoscandian Basin in the West Latvian Aizpute-41 core. Great fluctuations in mean grain size in the sections of the Pirgu (uppermost

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66f6833bd2ee5fd31b46b68117924de1
https://doi.org/10.3176/earth.2014.28

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