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Chitinozoan biostratigraphy across the Katian (Late Ordovician) GICE event in the Borenshult-1 drillcore (Sweden)

Pouille, Lauren ; Delabroye, Aurelien ; Vandenbroucke, Thijs R. A. ; Calner, Mikael LU orcid ; Lehnert, Oliver LU ; Vecoli, Marco and Danelian, Taniel (2013) In Review of Palaeobotany and Palynology 198. p.134-144
Abstract
The Late Ordovician is a period of major global environmental changes. Its understanding requires an integrated stratigraphical approach. Here, chitinozoan assemblages are described from the Borenshult-1 drillcore from Motala (Sweden) and related to stable carbon isotope event stratigraphy. Fifty-six rock samples, corresponding to a stratigraphic interval ranging from the upper Sandbian to Llandovery, were dissolved and analysed for chitinozoans. This stratigraphic interval covers the Sandbian to Llandovery and includes, in ascending order, the Freberga, Slandrom, Fjacka, Jonstorp, Loka and Motala formations. This study resulted in identification of two biozones the Spinachitina cervicomis Biozone (lower part of the Freberga Formation), as... (More)
The Late Ordovician is a period of major global environmental changes. Its understanding requires an integrated stratigraphical approach. Here, chitinozoan assemblages are described from the Borenshult-1 drillcore from Motala (Sweden) and related to stable carbon isotope event stratigraphy. Fifty-six rock samples, corresponding to a stratigraphic interval ranging from the upper Sandbian to Llandovery, were dissolved and analysed for chitinozoans. This stratigraphic interval covers the Sandbian to Llandovery and includes, in ascending order, the Freberga, Slandrom, Fjacka, Jonstorp, Loka and Motala formations. This study resulted in identification of two biozones the Spinachitina cervicomis Biozone (lower part of the Freberga Formation), as well as its Angochitina multiplex Subzone, and the Fungochitina spinifera Biozone (upper part of the Freberga Formation). The spinifera Biozone is characterized by the presence of Lagenochitina baltica, whereas the cervicomis Biozone is defined by the presence of its index species. Despite a low recovery of chitinozoans from Borenshult-1, we suggest that the Guttenberg Isotopic Carbon Excursion (GICE), as observed in the Borenshult-1 drillcore, correlates with the S. cervicomis Biozone. This fits well with chitinozoan and carbon isotope data from the Fjacka section in central Sweden (Dalarna, Siljan region) and from the Smedsby Gard drillcore (Ostergotland). The A. multiplex Subzone which is recognised in the Borenshult-1 and nearby Smedsby Gard drillcores, predates the GICE at both localities. (C) 2013 Elsevier B.V. All rights reserved. (Less)
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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chitinozoans, Stable isotope calibration, Late Ordovician, Baltoscandia, Borenshult-1 drillcore, Sweden
in
Review of Palaeobotany and Palynology
volume
198
pages
134 - 144
publisher
Elsevier
external identifiers
  • wos:000325843500009
  • scopus:84884353165
ISSN
0034-6667
DOI
10.1016/j.revpalbo.2013.05.007
language
English
LU publication?
yes
id
3e0203e4-d27d-41de-8715-12a3b670558d (old id 4157938)
date added to LUP
2016-04-01 15:04:08
date last changed
2023-01-04 08:17:30
@article{3e0203e4-d27d-41de-8715-12a3b670558d,
  abstract     = {{The Late Ordovician is a period of major global environmental changes. Its understanding requires an integrated stratigraphical approach. Here, chitinozoan assemblages are described from the Borenshult-1 drillcore from Motala (Sweden) and related to stable carbon isotope event stratigraphy. Fifty-six rock samples, corresponding to a stratigraphic interval ranging from the upper Sandbian to Llandovery, were dissolved and analysed for chitinozoans. This stratigraphic interval covers the Sandbian to Llandovery and includes, in ascending order, the Freberga, Slandrom, Fjacka, Jonstorp, Loka and Motala formations. This study resulted in identification of two biozones the Spinachitina cervicomis Biozone (lower part of the Freberga Formation), as well as its Angochitina multiplex Subzone, and the Fungochitina spinifera Biozone (upper part of the Freberga Formation). The spinifera Biozone is characterized by the presence of Lagenochitina baltica, whereas the cervicomis Biozone is defined by the presence of its index species. Despite a low recovery of chitinozoans from Borenshult-1, we suggest that the Guttenberg Isotopic Carbon Excursion (GICE), as observed in the Borenshult-1 drillcore, correlates with the S. cervicomis Biozone. This fits well with chitinozoan and carbon isotope data from the Fjacka section in central Sweden (Dalarna, Siljan region) and from the Smedsby Gard drillcore (Ostergotland). The A. multiplex Subzone which is recognised in the Borenshult-1 and nearby Smedsby Gard drillcores, predates the GICE at both localities. (C) 2013 Elsevier B.V. All rights reserved.}},
  author       = {{Pouille, Lauren and Delabroye, Aurelien and Vandenbroucke, Thijs R. A. and Calner, Mikael and Lehnert, Oliver and Vecoli, Marco and Danelian, Taniel}},
  issn         = {{0034-6667}},
  keywords     = {{Chitinozoans; Stable isotope calibration; Late Ordovician; Baltoscandia; Borenshult-1 drillcore; Sweden}},
  language     = {{eng}},
  pages        = {{134--144}},
  publisher    = {{Elsevier}},
  series       = {{Review of Palaeobotany and Palynology}},
  title        = {{Chitinozoan biostratigraphy across the Katian (Late Ordovician) GICE event in the Borenshult-1 drillcore (Sweden)}},
  url          = {{http://dx.doi.org/10.1016/j.revpalbo.2013.05.007}},
  doi          = {{10.1016/j.revpalbo.2013.05.007}},
  volume       = {{198}},
  year         = {{2013}},
}