Upper Paleocene radiolarians from DSDP Sites 549 and 550, Goban Spur, NE Atlantic

Liu, Jun, Aitchison, Jonathan C. and Ali, Jason R. (2011) Upper Paleocene radiolarians from DSDP Sites 549 and 550, Goban Spur, NE Atlantic. Palaeoworld, 20 2: 218-231. doi:10.1016/j.palwor.2011.02.002


Author Liu, Jun
Aitchison, Jonathan C.
Ali, Jason R.
Title Upper Paleocene radiolarians from DSDP Sites 549 and 550, Goban Spur, NE Atlantic
Journal name Palaeoworld   Check publisher's open access policy
ISSN 1871-174X
1875-5887
Publication date 2011-01-01
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.palwor.2011.02.002
Volume 20
Issue 2
Start page 218
End page 231
Total pages 14
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Upper Paleocene-lower Eocene sequences of mainly pelagic sediments in DSDP Sites 549 and 550 of Goban Spur, NE Atlantic, representing time periods of 10 and 6. m.y. respectively, were examined to investigate the biotic response of radiolarians to the PETM. The preservation of radiolarians in the lower Eocene sequences for both sites is poor. Upper Paleocene radiolarian assemblages, representing a time interval of ~59-56. Ma at Site 549 and a much shorter period at Site 550, are generally moderately well-preserved. Fifty-four species were identified. Four species occur significantly earlier in the middle high latitude NE Atlantic than in New Zealand, where the sudden appearance during the PETM has been taken as evidence of global pole-ward migration of warm-water radiolarians. Available model shows that the Goban Spur area should belong to the subpolar surface ocean gyre in the early Paleogene. Thus, our investigation questions the validity of the previously used index species of subtropical warm water masses. High-latitude offshore sections across the P/E boundary with well preserved radiolarians are needed to test the hypothesis of pole-ward migration of warm-water radiolarians during this geologically transient global warming period
Keyword Biotic response
NE Atlantic
PETM
Radiolarians
Upper Paleocene
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Geography, Planning and Environmental Management Publications
 
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Created: Wed, 29 Jul 2015, 20:25:27 EST by Helen Smith on behalf of School of Geography, Planning & Env Management