DOI: 10.1016/j.palaeo.2014.04.025
论文题名: Paleoenvironmental conditions recorded by 87Sr/86Sr, δ13C and δ18O in late Pliensbachian-Toarcian (Jurassic) belemnites from Bulgaria
作者: Metodiev L.S. ; Savov I.P. ; Gro¨cke D.R. ; Wignall P.B. ; Newton R.J. ; Andreeva P.V. ; Koleva-Rekalova E.K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 409 起始页码: 98
结束页码: 113
语种: 英语
英文关键词: Ammonite Record
; Belemnites
; Bulgaria
; Isotopes
; Lower Jurassic
; Sedimentary
英文摘要: The late Pliensbachian-Toarcian (Jurassic) sedimentological, paleontological and geochemical (belemnite 87Sr/86Sr, δ13C and δ18O) record is examined in two Eastern Tethyan (Bulgarian) locations. This interval contains the well-known early Toarcian ocean anoxic event (T-OAE) and its manifestation and temporal context is examined in Bulgaria. Many of the features seen in south-western Europe are identified: collapse of carbonate platform productivity at the Pliensbachian/Toarcian boundary, the T-OAE (a short pulse of euxinic deposition in the Falciferum Zone), an early Toarcian rapid warming event seen in the belemnite δ18O record that peaked around the Falciferum/Bifrons Zone boundary. The long-recognized positive δ13C excursion in the late Falciferum Zone is also seen but a precursor, sharp δ13C negative excursion seen around the Tenuicostatum/Falciferum Zone boundary in most organic carbon records is not seen in the belemnite data, a curious absence noted from other belemnite records. Subsequent perturbations in 87Sr/86Sr, δ13C and δ18O suggest that there may be more global isotopic excursions in the Early Jurassic. On the other hand, belemnite Sr isotope values from Bulgaria are in accord with those recorded in Western Europe and hence, demonstrating its value as a chronostratigraphic tool. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69288
Appears in Collections: 过去全球变化的重建
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作者单位: Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str. Bl. 24, Sofia, Bulgaria; University of Leeds, School of Earth and Environment, Earth Science Department, Leeds, United Kingdom; Durham University, Department of Earth Sciences, Durham, United Kingdom
Recommended Citation:
Metodiev L.S.,Savov I.P.,Gro¨cke D.R.,et al. Paleoenvironmental conditions recorded by 87Sr/86Sr, δ13C and δ18O in late Pliensbachian-Toarcian (Jurassic) belemnites from Bulgaria[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,409