DOI: 10.1016/j.gloplacha.2017.03.004
论文题名: A multistratigraphic approach to pinpoint the Permian-Triassic boundary in continental depositsThe Zechstein–Lower Buntsandstein transition in Germany
作者: Scholze F. ; Wang X. ; Kirscher U. ; Kraft J. ; Schneider J.W. ; Götz A.E. ; Joachimski M.M. ; Bachtadse V.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2017
卷: 152 起始页码: 129
结束页码: 151
语种: 英语
英文关键词: Biostratigraphy
; Central Germany
; Conchostraca
; Isotope geochemistry
; Magnetostratigraphy
; Major and trace elements
Scopus关键词: Biostratigraphy
; Deposits
; Exploratory geochemistry
; Geochemistry
; Isotopes
; Magnetic polarity
; Quarries
; Sedimentology
; Stratigraphy
; Central Germany
; Conchostraca
; Isotope geochemistry
; Magnetostratigraphy
; Major and trace elements
; Trace elements
; Conchostraca
; Euestheria
英文摘要: The Central European Basin is very suitable for high-resolution multistratigraphy of Late Permian to Early Triassic continental deposits. Here the well exposed continuous transition of the lithostratigraphic Zechstein and Buntsandstein Groups of Central Germany was studied for isotope-chemostratigraphy (δ13Corg, δ13Ccarb, δ18Ocarb), major and trace element geochemistry, magnetostratigraphy, palynology, and conchostracan biostratigraphy. The analysed material was obtained from both classical key sections (abandoned Nelben clay pit, Caaschwitz quarries, Thale railway cut, abandoned Heinebach clay pit) and a recent drill core section (Caaschwitz 6/2012) spanning the Permian-Triassic boundary. The Zechstein–Buntsandstein transition of Central Germany consists of a complex sedimentary facies comprising sabkha, playa lake, aeolian, and fluvial deposits of predominantly red-coloured siliciclastics and intercalations of lacustrine oolitic limestones. The new data on δ13Corg range from − 28.7 to − 21.7 ‰ showing multiple excursions. Most prominent negative shifts correlate with intercalations of oolites and grey-coloured clayey siltstones, while higher δ13Corg values correspond to an onset of palaeosol overprint. The δ13Ccarb values range from − 9.7 to − 1.3 ‰ with largest variations recorded in dolomitic nodules from the Zechstein Group. In contrast to sedimentary facies shifts across the Zechstein-Buntsandstein boundary, major element values used as a proxy (CIA, CIA*, CIA-K) for weathering conditions indicate climatic stability. Trace element data used for a geochemical characterization of the Late Permian to Early Triassic transition in Central Germany indicate a decrease in Rb contents at the Zechstein-Buntsandstein boundary. New palynological data obtained from the Caaschwitz quarry section reveal occurrences of Late Permian palynomorphs in the Lower Fulda Formation, while Early Triassic elements were recorded in the upper part of the Upper Fulda Formation. The present study confirms an onset of a normal-polarized magnetozone in the Upper Fulda Formation of the Caaschwitz quarry section supporting an interregional correlation of this crucial stratigraphic interval with the normal magnetic polarity of the basal Early Triassic known from marine sections in other regions. Based on a synthesis of the multistratigraphic data, the Permian-Triassic boundary is proposed to be placed in the lower part of the Upper Fulda Formation, which is biostratigraphically confirmed by the first occurrence date of the Early Triassic Euestheria gutta-Palaeolimnadiopsis vilujensis conchostracan fauna. Rare records of conchostracans reported from the siliciclastic deposits of the lower to middle Zechstein Group may point to its potential for further biostratigraphic subdivision of the Late Permian continental deposits. © 2017 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016394888&doi=10.1016%2fj.gloplacha.2017.03.004&partnerID=40&md5=5e0cc8597ffa74c661362c373678e05c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11733
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Technische Universität Bergakademie Freiberg, Geological Institute, Bernhard-von-Cotta-Str. 2, Freiberg, Germany
Recommended Citation:
Scholze F.,Wang X.,Kirscher U.,et al. A multistratigraphic approach to pinpoint the Permian-Triassic boundary in continental depositsThe Zechstein–Lower Buntsandstein transition in Germany[J]. Global and Planetary Change,2017-01-01,152.