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one publication added to basket [199061]

Age constraints on the origin and growth history of a deep-water coral mound in the northeast Atlantic drilled during Integrated Ocean Drilling Program Expedition 307 Kano, A.; Ferdelman, T. G.; Williams, T.; Henriet, J.-P.; Ishikawa, T.; Kawagoe, N.; Takashima, C.; Kakizaki, Y.; Abe, K.; Sakai, S.; Browning, E. L.; Li, X.; Integrated Ocean Drilling Program Expedition 307 Scientists (2007). Age constraints on the origin and growth history of a deep-water coral mound in the northeast Atlantic drilled during Integrated Ocean Drilling Program Expedition 307. Geology (Boulder Colo.) 35(11): 1051-1054. dx.doi.org/10.1130/G23917A.1 In: Geology. Geological Society of America: Boulder. ISSN 0091-7613; e-ISSN 1943-2682

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 214836 [ download pdf ]

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Trefwoord

Marien/Kust

Author keywords

deep-water coral mound; northeast Atlantic; Porcupine Seabight; 87Sr; 86Sr; Pliocene-Pleistocene; Integrated Ocean Drilling Program

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Auteurs		Top
Kano, A. Ferdelman, T. G. Williams, T. Henriet, J.-P. Ishikawa, T.	Kawagoe, N. Takashima, C. Kakizaki, Y. Abe, K.	Sakai, S. Browning, E. L. Li, X. Integrated Ocean Drilling Program Expedition 307 Scientists

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Abstract

Sr isotope stratigraphy provides a new age model for the first complete section drilled through a deep-water coral mound. The 155-m-long section from Challenger Mound in the Porcupine Sea-bight, southwest of Ireland, is on Miocene siliciclastics and consists entirely of sediments bearing well-preserved cold-water coral Lophelia pertusa. The 87Sr/86Sr values of 28 coral specimens from the mound show an upward-increasing trend, correspond to ages from 2.6 to 0.5 Ma, and identify a significant hiatus from ca. 1.7 to 1.0 Ma at 23.6 m below seafloor. The age of the basal mound sediments coincides with the intensification of Northern Hemisphere glaciations that set up the modern stratification of the northeast Atlantic and enabled coral growth. Mound growth persisted throughout glacial-interglacial fluctuations, reached a maximum rate (24 cm/k.y.) ca. 2.0 Ma, and ceased at 1.7 Ma. Unlike other buried mounds in Porcupine Seabight, Challenger Mound was only partly covered during its growth interruption, and growth restarted ca. 1.0 Ma.

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