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Temporal constraints on the Paleoproterozoic Lomagundi-Jatuli carbon isotopic event

Melezhik, Victor A.; Huhma, Hannu; Condon, Daniel J.; Fallick, Anthony E.; Whitehouse, Martin J.. 2007 Temporal constraints on the Paleoproterozoic Lomagundi-Jatuli carbon isotopic event. Geology, 35 (7). 655-658. doi: 10.1130/G23764A.1

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Abstract/Summary

The Paleoproterozoic Lomagundi-Jatuli positive 13C excursion in sedimentary carbonates represents an event whose magnitude and duration is unique in Earth history, although precise absolute chronology of this event remains poorly constrained. In northeastern Fennoscandia, an 1300-m-thick sedimentary-volcanic succession of the Pechenga Greenstone Belt records decline of this isotopic excursion. Zircons from sedimentary rocks that occur within the decline have yielded 207Pb/206Pb dates at 2058 ± 2 Ma (±6 Ma including U decay constant uncertainties) and provide the first maximum age constraint on the termination of the Lomagundi-Jatuli event. Combined with existing constraints, these data indicate an 140 m.y. interval characterized by 13C-rich carbonate accumulation.

Item Type: Publication - Article
Digital Object Identifier (DOI): doi: 10.1130/G23764A.1
Programmes: BGS Programmes > NERC Isotope Geoscience Laboratory
ISSN: 00917613
Additional Information. Not used in RCUK Gateway to Research.: Work on this paper was completed whilst the author was a member of NERC staff.
NORA Subject Terms: Earth Sciences
Date made live: 26 Oct 2007 10:59
URI: http://nora.nerc.ac.uk/id/eprint/1032

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