Bulk-carbonate and belemnite carbon-isotope records across the Pliensbachian-Toarcian boundary on the northern margin of Gondwana (Issouka, Middle Atlas, Morocco)

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• 作者：Fatima-Zahra Ait-Itto^a ; ^{fz.aititto@gmail.com} ; Gregory D Price^b ; Abdellah Ait Addi^a ; Driss Chafiki^a ; Imane Mannani^a
• 关键词：Palaeoenvironment ; Stratigraphy ; Early Jurassic ; δ13C ; δ18O
• 刊名：Palaeogeography, Palaeoclimatology, Palaeoecology
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：466
• 期：Complete
• 页码：128-136
• 全文大小：2337 K
• 卷排序：466

文摘

A negative carbon isotope excursion at the Pliensbachian–Toarcian boundary Belemnite records show positive carbon isotope values. Data suggest spatial heterogeneity of the Early Jurassic ocean. Patterns consistent with volcanic outgassing as a trigger of the boundary event We propose a regional change in the source of the carbonate carrying to a negative carbon isotope in micrite signature.