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

Dahlqvist, Peter; Calner, Mikael LU ; Kallaste, Toivo; Kiipli, Tarmo and Siir, Sven (2012) In GFF 134(4). p.273-282
Abstract
This paper reports on the geochemistry of the mid-Silurian Grotlingbo Bentonite, a ca. 0.10.4-m-thick and regionally important bentonite bed in Sweden and the East Baltic area. A series of eight samples, spaced by 5cm, were taken from the Hunninge-1 drillcore in Gotland, Sweden, and were analysed in order to establish the vertical element composition and variation in the bentonite. The results show that the Gotlingbo Bentonite originates from one source magma and from one single eruption. The lowermost 0.10.15m of the bentonite (compacted) was deposited from air-transport fall-out, whereas the upper portions have been reworked in a shallow-marine environment and re-deposited. Vertical differences in Ti and Zr within the Grotlingbo... (More)
This paper reports on the geochemistry of the mid-Silurian Grotlingbo Bentonite, a ca. 0.10.4-m-thick and regionally important bentonite bed in Sweden and the East Baltic area. A series of eight samples, spaced by 5cm, were taken from the Hunninge-1 drillcore in Gotland, Sweden, and were analysed in order to establish the vertical element composition and variation in the bentonite. The results show that the Gotlingbo Bentonite originates from one source magma and from one single eruption. The lowermost 0.10.15m of the bentonite (compacted) was deposited from air-transport fall-out, whereas the upper portions have been reworked in a shallow-marine environment and re-deposited. Vertical differences in Ti and Zr within the Grotlingbo Bentonite mean that regional correlation of the bed may need several samples at each locality to be reliable. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Sweden, Grotlingbo Bentonite, Gotland, Silurian
in
GFF
volume
134
issue
4
pages
273 - 282
publisher
Geological Society of Sweden
external identifiers
  • wos:000317822000004
  • scopus:84876302448
ISSN
2000-0863
DOI
10.1080/11035897.2012.759147
language
English
LU publication?
yes
id
f420a56f-f2eb-4b73-bf7d-7a9e78ffe4f1 (old id 3857835)
date added to LUP
2013-06-19 12:25:05
date last changed
2017-01-01 04:01:02
@article{f420a56f-f2eb-4b73-bf7d-7a9e78ffe4f1,
  abstract     = {This paper reports on the geochemistry of the mid-Silurian Grotlingbo Bentonite, a ca. 0.10.4-m-thick and regionally important bentonite bed in Sweden and the East Baltic area. A series of eight samples, spaced by 5cm, were taken from the Hunninge-1 drillcore in Gotland, Sweden, and were analysed in order to establish the vertical element composition and variation in the bentonite. The results show that the Gotlingbo Bentonite originates from one source magma and from one single eruption. The lowermost 0.10.15m of the bentonite (compacted) was deposited from air-transport fall-out, whereas the upper portions have been reworked in a shallow-marine environment and re-deposited. Vertical differences in Ti and Zr within the Grotlingbo Bentonite mean that regional correlation of the bed may need several samples at each locality to be reliable.},
  author       = {Dahlqvist, Peter and Calner, Mikael and Kallaste, Toivo and Kiipli, Tarmo and Siir, Sven},
  issn         = {2000-0863},
  keyword      = {Sweden,Grotlingbo Bentonite,Gotland,Silurian},
  language     = {eng},
  number       = {4},
  pages        = {273--282},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {Geochemical variations within the mid-Silurian Grotlingbo Bentonite (Gotland, Sweden): discriminating between magmatic composition, ash transport fractionation and diagenetic effects},
  url          = {http://dx.doi.org/10.1080/11035897.2012.759147},
  volume       = {134},
  year         = {2012},
}