DOI: 10.5194/cp-12-1199-2016
Scopus记录号: 2-s2.0-84971278546
论文题名: Palaeoclimatic oscillations in the Pliensbachian (Early Jurassic) of the Asturian Basin (Northern Spain)
作者: Gómez J.J. ; Comas-Rengifo M.J. ; Goy A.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 5 起始页码: 1199
结束页码: 1214
语种: 英语
Scopus关键词: ammonite
; belemnite
; chronostratigraphy
; climate variation
; mass extinction
; paleoclimate
; paleotemperature
; Pangaea
; Pliensbachian
; Sinemurian
; stable isotope
; Toarcian
; Asturian Basin
; Spain
英文摘要: One of the main controversial themes in palaeoclimatology involves elucidating whether climate during the Jurassic was warmer than the present day and if it was the same over Pangaea, with no major latitudinal gradients. There has been an abundance of evidence of oscillations in seawater temperature throughout the Jurassic. The Pliensbachian (Early Jurassic) constitutes a distinctive time interval for which several seawater temperature oscillations, including an exceptional cooling event, have been documented. To constrain the timing and magnitude of these climate changes, the Rodiles section of the Asturian Basin (Northern Spain), a well exposed succession of the uppermost Sinemurian, Pliensbachian and Lower Toarcian deposits, has been studied. A total of 562 beds were measured and sampled for ammonites, for biochronostratigraphical purposes, and for belemnites, to determine the palaeoclimatic evolution through stable isotope studies. Comparison of the recorded latest Sinemurian, Pliensbachian and Early Toarcian changes in seawater palaeotemperature with other European sections allows characterization of several climatic changes that are likely of a global extent. A warming interval partly coinciding with a δ13Cbel negative excursion was recorded at the Late Sinemurian. After a "normal" temperature interval, with temperatures close to average values of the Late Sinemurian-Early Toarcian period, a new warming interval containing a short-lived positive δ13Cbel peak, developed during the Early-Late Pliensbachian transition. The Late Pliensbachian represents an outstanding cooling interval containing a δ13Cbel positive excursion interrupted by a small negative δ13Cbel peak. Finally, the Early Toarcian represented an exceptional warming period, which has been pointed out as being responsible for the prominent Early Toarcian mass extinction. © 2016 Author(s) CC Attribution 3.0 License. 资助项目: UCM, Universidad Complutense de Madrid
; UCM, Universidad Complutense de Madrid
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49012
Appears in Collections: 气候变化与战略
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Recommended Citation:
Gómez J.J.,Comas-Rengifo M.J.,Goy A.. Palaeoclimatic oscillations in the Pliensbachian (Early Jurassic) of the Asturian Basin (Northern Spain)[J]. Climate of the Past,2016-01-01,12(5)