globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.02.025
论文题名:
Conodont Sr/Ca and δ18O record seawater changes at the Frasnian-Famennian boundary
作者: Le Houedec S.; Girard C.; Balter V.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 376
起始页码: 114
结束页码: 121
语种: 英语
英文关键词: δ18O ; Conodont apatite ; Frasnian-Famennian boundary ; Seawater ; Sr/Ca
英文摘要: The oxygen isotopic composition (δ18Op) and strontium/calcium (Sr/Cap) ratios have been measured in Late Devonian conodonts (Palmatolepis sp.) from contemporaneous sections at Coumiac (France) and M'rirt (Morocco). The sequences encompass two anoxic horizons, the Lower Kellwasser (LKW) and Upper Kellwasser (UKW) events with the top of the UKW coinciding with the mass-extinction at the Frasnian-Famennian boundary. The genus Palmatolepis survived the faunal crisis but exhibited plastic responses to the environmental changes, which are recorded in the evolution of shape during the anoxic events. The present study demonstrates that shape, δ18Op and Sr/Cap values of conodonts are correlated in both localities excluding diagenesis as the driving process for the measured δ18Op and Sr/Cap values. The conodonts δ18Op and Sr/Cap values are correlated in both localities and distributed into either a "pre-crisis" and "crisis" group. Using the relationships between the δ18Op and Sr/Cap values, we estimate that the variation of the seawater Sr/Ca ratio during the Frasnian-Famennian mass extinction was of about 20% its initial value. This drastic decrease of the seawater Sr/Ca ratio is discussed in the light of the reef demise that occurred during the faunal crisis.© 2013 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69763
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Laboratoire de Géochimie-Cosmochimie, Institut de Physique du Globe de Paris, Université Paris 7, 1 rue Jussieu, 75005 Paris, France; CNRS, UMR 5554 Institut des Sciences de l'Evolution, Université Montpellier II, C.C. 64, Place Eugène bataillon, 34095 Montpellier Cedex 05, France; Laboratoire de Géologie de Lyon, UMR5276, CNRS, Ecole Normale Supérieure de Lyon, 15 parvis René Descartes BP 7000, 69342 Lyon Cedex 07, France

Recommended Citation:
Le Houedec S.,Girard C.,Balter V.. Conodont Sr/Ca and δ18O record seawater changes at the Frasnian-Famennian boundary[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,376
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Le Houedec S.]'s Articles
[Girard C.]'s Articles
[Balter V.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Le Houedec S.]'s Articles
[Girard C.]'s Articles
[Balter V.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Le Houedec S.]‘s Articles
[Girard C.]‘s Articles
[Balter V.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.