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Spike of pyrosynthetic polycyclic aromatic hydrocarbons associated with an abrupt decrease in δ13C of a terrestrial biomarker at the Cretaceous-Tertiary boundary at Caravaca, Spain

1999; Geological Society of America; Volume: 27; Issue: 8 Linguagem: Inglês

10.1130/0091-7613(1999)027 2.3.co;2

1943-2682

Tetsuya Arinobu, Ryoshi Ishiwatari, Kunio Kaiho, Marcos A. Lamolda,

Geological and Geochemical Analysis

Research Article| August 01, 1999 Spike of pyrosynthetic polycyclic aromatic hydrocarbons associated with an abrupt decrease in δ13C of a terrestrial biomarker at the Cretaceous-Tertiary boundary at Caravaca, Spain Tetsuya Arinobu; Tetsuya Arinobu 1Department of Chemistry, Tokyo Metropolitan University, Tokyo 192-0364, Japan Search for other works by this author on: GSW Google Scholar Ryoshi Ishiwatari; Ryoshi Ishiwatari 1Department of Chemistry, Tokyo Metropolitan University, Tokyo 192-0364, Japan Search for other works by this author on: GSW Google Scholar Kunio Kaiho; Kunio Kaiho 2Institute of Geology and Paleontology, Tohoku University, Sendai 980-8578, Japan Search for other works by this author on: GSW Google Scholar Marcos A. Lamolda Marcos A. Lamolda 3Departamento de Estratigrafía y Paleontología, Universidad del País Vasco, Lejona 48940, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information Tetsuya Arinobu 1Department of Chemistry, Tokyo Metropolitan University, Tokyo 192-0364, Japan Ryoshi Ishiwatari 1Department of Chemistry, Tokyo Metropolitan University, Tokyo 192-0364, Japan Kunio Kaiho 2Institute of Geology and Paleontology, Tohoku University, Sendai 980-8578, Japan Marcos A. Lamolda 3Departamento de Estratigrafía y Paleontología, Universidad del País Vasco, Lejona 48940, Spain Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1999) 27 (8): 723–726. https://doi.org/10.1130/0091-7613(1999)027 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Tetsuya Arinobu, Ryoshi Ishiwatari, Kunio Kaiho, Marcos A. Lamolda; Spike of pyrosynthetic polycyclic aromatic hydrocarbons associated with an abrupt decrease in δ13C of a terrestrial biomarker at the Cretaceous-Tertiary boundary at Caravaca, Spain. Geology 1999;; 27 (8): 723–726. doi: https://doi.org/10.1130/0091-7613(1999)027 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The first vertical high-resolution record of polycyclic aromatic hydrocarbons (PAHs) of pyrosynthetic origin and the corresponding δ13C profile of a terrestrial biomarker across the Cretaceous-Tertiary (K-T) boundary at Caravaca, Spain, reveals the following. In comparison with adjacent Cretaceous marlstones, the first thin horizon (0 to +0.5 cm; 0 = the K-T boundary) of the boundary-clay layer is (1) enriched as much as 112 to 154 fold in typical pyrosynthetic PAHs such as coronene, benzo(g,h,i)perylene, and benzo(e)pyrene and (2) shows an abrupt δ13C decrease of 1.4‰–1.8‰ in terrestrial higher plant-derived n-C29 alkane. The spike of pyrosynthetic PAHs associated with an abrupt decrease in δ13C value of a terrestrial biomarker is interpreted to reflect the prevalence of extensive fires with subsequent δ13C decrease in atmospheric CO2. It is estimated that the geologically instantaneous combustion of ∼18%–24% of the terrestrial above-ground biomass would be necessary to account for the measured negative isotopic shift at the K-T boundary, on the basis of carbon mass balance between terrestrial above-ground biomass and atmosphere. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.