globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2017.11.055
Scopus记录号: 2-s2.0-85038209610
论文题名:
Deccan volcanism induced high-stress environment during the Cretaceous–Paleogene transition at Zumaia, Spain: Evidence from magnetic, mineralogical and biostratigraphic records
作者: Font E.; Adatte T.; Andrade M.; Keller G.; Mbabi Bitchong A.; Carvallo C.; Ferreira J.; Diogo Z.; Mirão J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 484
起始页码: 53
结束页码: 66
语种: 英语
英文关键词: acidification ; akaganéite ; Cretaceous–Paleogene mass extinction ; Deccan ; mercury ; volcanism
Scopus关键词: Acidification ; Biostratigraphy ; Carbon ; Iron oxides ; Lithology ; Magnetite ; Organic carbon ; Sedimentary rocks ; Sedimentology ; Stratigraphy ; Concomitant decrease ; Deccan ; Magnetotactic Bacteria ; Mass extinction ; Most probable explanation ; Ocean acidifications ; Total Organic Carbon ; volcanism ; Mercury (metal) ; acidification ; akaganeite ; biostratigraphy ; Cretaceous-Paleogene boundary ; Deccan Traps ; magnetic method ; marine sediment ; mass extinction ; mercury (element) ; mineralogy ; paleoclimate ; paleoenvironment ; volcanic eruption ; volcanism ; Basque Country [Spain] ; Gipuzkoa ; Spain ; Zumaia
英文摘要: We conducted detailed rock magnetic, mineralogical and geochemical (mercury) analyses spanning the Cretaceous–Paleogene boundary (KPB) at Zumaia, Spain, to unravel the signature of Deccan-induced climate and environmental changes in the marine sedimentary record. Our biostratigraphic results show that Zumaia is not complete, and lacks the typical boundary clay, zone P0 and the base of zone P1a(1) in the basal Danian. Presence of an unusual ∼1m-thick interval spanning the KPB is characterized by very low detrital magnetite and magnetosome (biogenic magnetite) contents and by the occurrence of akaganéite, a very rare mineral on Earth in oxidizing, acidic and hyper-chlorinated environments compatible with volcanic settings. These benchmarks correlate with higher abundance of the opportunist Guembelitria cretacea species. Detrital magnetite depletion is not linked to significant lithological changes, suggesting that iron oxide dissolution by acidification is the most probable explanation. The concomitant decrease in magnetosomes, produced by magnetotactic bacteria at the anoxic–oxic boundary, is interpreted as the result of changes in seawater chemistry induced by surficial ocean acidification. Mercury peaks up to 20–50 ppb are common during the last 100 kyr of the Maastrichtian (zone CF1) but only one significant anomaly is present in the early Danian, which is likely due to the missing interval. Absence of correlation between mercury content (R2 = 0.009) and total organic carbon (R2 = 0.006) suggest that the former originated from the Deccan Traps eruptions. No clear relation between the stratigraphic position of the mercury peaks and the magnetite-depleted interval is observed, although the frequency of the mercury peaks tends to increase close to the KPg boundary. In contrast to Bidart (France) and Gubbio (Italy), where magnetite depletion and akaganéite feature within a ∼50cm-thick interval located 5 cm below the KPg boundary, the same benchmarks are observed in a 1m-thick interval encompassing the KPg boundary at Zumaia. Results reinforce the synchronism of the major eruptions of the Deccan Traps Magmatic Province with the Cretaceous–Paleogene (KPg) mass extinction and provide new clues to better correlate the Deccan imprint of the global sedimentary record. © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110055
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: IDL-FCUL, Instituto Dom Luís, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, Lisbon, Portugal; ISTE, Lausanne University, Geopolis, Lausanne, CH-1015, Switzerland; Department of Geosciences, Princeton University, Princeton, NJ 08544, United States; Department of Earth Sciences, Faculty of Science, University of Yaounde 1, P.O. Box 812, Yaounde, Cameroon; Department of Petroleum and Gas Exploration, Faculty of Mines and Petroleum Industries, University of Maroua, P.O. Box 08, Kaele, Cameroon; Institut de Minéralogie, de Physique des Minéraux et de Cosmochimie, Sorbonne Universités-Pierre and Marie Curie, University of Paris 06, UMR CNRS 7590, Muséum National d'Histoire Naturelle, IRD UMR 206, Paris, France; HERCULES Centre, ECT, Geosciences Department, University of Évora, Évora, Portugal

Recommended Citation:
Font E.,Adatte T.,Andrade M.,et al. Deccan volcanism induced high-stress environment during the Cretaceous–Paleogene transition at Zumaia, Spain: Evidence from magnetic, mineralogical and biostratigraphic records[J]. Earth and Planetary Science Letters,2018-01-01,484
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