New U-Pb zircon ages of the Sandbian (Upper Ordovician) "Big K-bentonite" in Baltoscandia (Estonia and Sweden) by LA-ICPMS
2014 (English)In: GFF, ISSN 1103-5897, Vol. 136, no 1, 30-33 p.Article in journal (Refereed) Published
Oscillatory-zoned euhedral single zircons from the upper Sandbian (Upper Ordovician) Kinnekulle K-bentonite exposed in a hillock at Paaskula in Estonia and at the type locality on Mt Kinnekulle in Sweden were dated in a grain-by-grain manner by laser ablation-inductively coupled plasma mass spectrometer. The U-Pb (weighed mean) ages of the 25 grains from Mt Kinnekulle and 24 grains from Paaskula are 453.4 +/- 6.6 and 454.9 +/- 4.9Ma, respectively. This study provides the first ca. 454Ma (late Sandbian) age for the Ordovician K-bentonite in northern Estonia and confirmed its correlation with the type Kinnekulle bed across the Baltic Sea.
Place, publisher, year, edition, pages
2014. Vol. 136, no 1, 30-33 p.
IdentifiersURN: urn:nbn:se:uu:diva-220379DOI: 10.1080/11035897.2013.862854ISI: 000335945500007OAI: oai:DiVA.org:uu-220379DiVA: diva2:704706
FunderSwedish Research Council, 2009-4395, 2012-1658