Price, G. D. and Sellwood, B. W. (1999): Isotopic variation in late Cenomanian to early Turonian Foraminifera and matrix from DSDP Site 551 (Goban Spur, Northeast Atlantic)
Leg/Site/Hole:
Related Expeditions:
DSDP 80
Identifier:
ID:
2002-013603
Type:
georefid
Creator:
Name:
Price, G. D.
Affiliation:
University of Plymouth, Department of Geological Sciences, Plymouth, United Kingdom
Role:
author
Name:
Sellwood, B. W.
Affiliation:
University of Reading, United Kingdom
Role:
author
Identification:
Title:
Isotopic variation in late Cenomanian to early Turonian Foraminifera and matrix from DSDP Site 551 (Goban Spur, Northeast Atlantic)
Year:
1999
Source:
In: Williams, Brian J. (editor), Geoscience in South-West England
Publisher:
Ussher Society, Bristol, United Kingdom
Volume:
9, Part 4
Issue:
Pages:
297-299
Abstract:
Stable isotopic measurements have been made on both planktonic foraminifera and coccolith-rich matrix of Cretaceous (latest Cenomanian-early Turonian) age from DSDP site 551 (Goban Spur, Northeast Atlantic). The foraminifera display a delta (super 18) O range of 1.1 to 2.2 per mil (PDB) whilst the delta (super 13) C values are confined to a narrower range of 2.0 to 2.1 per mil (PDB). The preservation of the foraminifera has been assessed through geochemistry and scanning electron microscopy and indicates that they show evidence of some diagenetic alteration. Consequently palaeotemperature estimates using these values are deemed to be in general unreliable. The delta (super 13) C of the matrix (in conjunction with published data) show heaviest values during the latest Cenomanian. The data are thus consistent with the widely observed positive carbon isotope excursion associated with the latest Cenomanian oceanic anoxic event.
Language:
English
Genre:
Rights:
URL:
Coverage: Geographic coordinates: North:48.5439 West:-13.3006 East:
-13.3005 South:48.5438
Keywords: Stratigraphy; Isotope geochemistry; algae; anaerobic environment; Atlantic Ocean; biochemistry; C-13/C-12; carbon; carbonate rocks; Cenomanian; chalk; Coccolithophoraceae; cores; Cretaceous; Deep Sea Drilling Project; diagenesis; DSDP Site 551; Foraminifera; fossilization; geochemistry; Globigerinacea; Globotruncana; Globotruncanidae; Goban Spur; Invertebrata; IPOD; isotope ratios; isotopes; Leg 80; lower Turonian; marine environment; matrix; Mesozoic; microfossils; North Atlantic; Northeast Atlantic; O-18/O-16; oxygen; paleo-oceanography; paleoecology; planktonic taxa; Plantae; Protista; Rotaliina; Rotalipora; sedimentary rocks; SEM data; stable isotopes; trace elements; Turonian; upper Cenomanian; Upper Cretaceous;
.