Advanced

Upper Ordovician δ13Corg chemostratigraphy, K-bentonite stratigraphy, and biostratigraphy in southern Scandinavia : A reappraisal

Bergström, Stig M.; Eriksson, Mats E. LU ; Schmitz, Birger LU ; Young, Seth A. and Ahlberg, Per LU (2016) In Palaeogeography, Palaeoclimatology, Palaeoecology 454. p.175-188
Abstract

A pioneer δ13Corg study through the upper Sandbian and Katian (Upper Ordovician) succession in the Röstånga 1 drill core in the classical geological outcrop area at Röstånga in southernmost Sweden produced a wealth of new carbon isotope data which are useful for local and regional correlations. Among the Upper Ordovician positive δ13C excursions, the Guttenberg (GICE), Waynesville (Saunja), Whitewater (Moe), Paroveja, and Hirnantian (HICE) isotopic carbon excursions are recognized but the Kope (Rakvere) δ13C excursion is missing, suggesting a stratigraphic gap. All these isotopic excursions are tied closely to biostratigraphy, especially graptolite biostratigraphy, and in the case of the... (More)

A pioneer δ13Corg study through the upper Sandbian and Katian (Upper Ordovician) succession in the Röstånga 1 drill core in the classical geological outcrop area at Röstånga in southernmost Sweden produced a wealth of new carbon isotope data which are useful for local and regional correlations. Among the Upper Ordovician positive δ13C excursions, the Guttenberg (GICE), Waynesville (Saunja), Whitewater (Moe), Paroveja, and Hirnantian (HICE) isotopic carbon excursions are recognized but the Kope (Rakvere) δ13C excursion is missing, suggesting a stratigraphic gap. All these isotopic excursions are tied closely to biostratigraphy, especially graptolite biostratigraphy, and in the case of the Waynesville (Saunja) and Whitewater (Moe) excursions, for the first time anywhere in the world. The Röstånga GICE δ13Corg curve from the upper Sularp Shale shows a striking similarity to that of the Katian GSSP in Oklahoma, suggesting the potential of trans-Atlantic correlation. Based on a projection from the Katian GSSP, the previously poorly constrained position of the base of the Katian in southern Sweden appears to be in the uppermost Sularp Shale in strata of the upper Diplograptus foliaceus Zone. Previous interpretations of the relations between K-bentonite successions in southern Scandinavia are somewhat revised and the Kinnekulle K-bentonite is recognized for the first time in Scania. Based on new radiometric dates, this very prominent and widespread ash bed appears to be slightly older than the Deicke and Millbrig K-bentonites in eastern North America.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biostratigraphy, K-bentonites, Ordovician, Scandinavia, δC chemostratigraphy
in
Palaeogeography, Palaeoclimatology, Palaeoecology
volume
454
pages
14 pages
publisher
Elsevier
external identifiers
  • Scopus:84966280555
ISSN
0031-0182
DOI
10.1016/j.palaeo.2016.04.037
language
English
LU publication?
yes
id
fcf5fc20-670c-4718-b25b-a99c346f8d16
date added to LUP
2016-09-27 11:19:29
date last changed
2016-09-27 11:19:29
@misc{fcf5fc20-670c-4718-b25b-a99c346f8d16,
  abstract     = {<p>A pioneer δ<sup>13</sup>C<sub>org</sub> study through the upper Sandbian and Katian (Upper Ordovician) succession in the Röstånga 1 drill core in the classical geological outcrop area at Röstånga in southernmost Sweden produced a wealth of new carbon isotope data which are useful for local and regional correlations. Among the Upper Ordovician positive δ<sup>13</sup>C excursions, the Guttenberg (GICE), Waynesville (Saunja), Whitewater (Moe), Paroveja, and Hirnantian (HICE) isotopic carbon excursions are recognized but the Kope (Rakvere) δ<sup>13</sup>C excursion is missing, suggesting a stratigraphic gap. All these isotopic excursions are tied closely to biostratigraphy, especially graptolite biostratigraphy, and in the case of the Waynesville (Saunja) and Whitewater (Moe) excursions, for the first time anywhere in the world. The Röstånga GICE δ<sup>13</sup>C<sub>org</sub> curve from the upper Sularp Shale shows a striking similarity to that of the Katian GSSP in Oklahoma, suggesting the potential of trans-Atlantic correlation. Based on a projection from the Katian GSSP, the previously poorly constrained position of the base of the Katian in southern Sweden appears to be in the uppermost Sularp Shale in strata of the upper Diplograptus foliaceus Zone. Previous interpretations of the relations between K-bentonite successions in southern Scandinavia are somewhat revised and the Kinnekulle K-bentonite is recognized for the first time in Scania. Based on new radiometric dates, this very prominent and widespread ash bed appears to be slightly older than the Deicke and Millbrig K-bentonites in eastern North America.</p>},
  author       = {Bergström, Stig M. and Eriksson, Mats E. and Schmitz, Birger and Young, Seth A. and Ahlberg, Per},
  issn         = {0031-0182},
  keyword      = {Biostratigraphy,K-bentonites,Ordovician,Scandinavia,δC chemostratigraphy},
  language     = {eng},
  month        = {07},
  pages        = {175--188},
  publisher    = {ARRAY(0x867bba8)},
  series       = {Palaeogeography, Palaeoclimatology, Palaeoecology},
  title        = {Upper Ordovician δ<sup>13</sup>C<sub>org</sub> chemostratigraphy, K-bentonite stratigraphy, and biostratigraphy in southern Scandinavia : A reappraisal},
  url          = {http://dx.doi.org/10.1016/j.palaeo.2016.04.037},
  volume       = {454},
  year         = {2016},
}