δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations
The Bylot Supergroup, northern Baffin Island, contains >1500 m of platform, shelf, and slope carbonates deposited between ~ 1270 and ~ 723 Ma. Limited chronostratigraphic data have led to the broad correlation of the Bylot Supergroup with predominantly Neoproterozoic successions in northern and w...
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1999
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crcansciencepubl:10.1139/e98-100 2024-10-13T14:06:12+00:00 δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations Kah, Linda C Sherman, Anne G Narbonne, Guy M Knoll, Andrew H Kaufman, Alan J 1999 http://dx.doi.org/10.1139/e98-100 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-100 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 36, issue 3, page 313-332 ISSN 0008-4077 1480-3313 journal-article 1999 crcansciencepubl https://doi.org/10.1139/e98-100 2024-09-19T04:09:48Z The Bylot Supergroup, northern Baffin Island, contains >1500 m of platform, shelf, and slope carbonates deposited between ~ 1270 and ~ 723 Ma. Limited chronostratigraphic data have led to the broad correlation of the Bylot Supergroup with predominantly Neoproterozoic successions in northern and western Laurentia; yet, detailed correlation has been impossible given biostratigraphic and lithostratigraphic limitations. Carbon-isotope chemostratigraphy represents a potential dataset to constrain such interregional correlations. Carbon isotopic data from the Bylot Supergroup and broadly coeval successions from Somerset Island and northwest Greenland reveal distinct stratigraphic trends in δ 13 C, with intervals of moderate 13 C enrichment (+3.5 ± 1) punctuated by excursions to slightly negative values (-1.0 ± 1). Although the scale of the observed variation is muted relative to Neoproterozoic standards, the dissimilarity of values to those recorded in northwestern Laurentia suggests that these strata delineate a discrete depositional interval. Comparison of isotopic values with published data indicates that δ 13 C values between approximately -1.0 and +4.0 are characteristic of the interval between ~ 1300 and ~ 800 Ma. This pattern is distinct from that of younger Neoproterozoic successions, which typically record values >+5, and older Mesoproterozoic successions, which record values near 0, and suggests that these moderately positive values may be useful for broad time correlation. Compilation of new and published data permits the tentative reconstruction of a global Mesoproterozoic carbon isotopic curve. Article in Journal/Newspaper Baffin Island Baffin Greenland Somerset Island Canadian Science Publishing Baffin Island Canada Greenland Somerset Island ENVELOPE(-93.500,-93.500,73.251,73.251) Canadian Journal of Earth Sciences 36 3 313 332 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The Bylot Supergroup, northern Baffin Island, contains >1500 m of platform, shelf, and slope carbonates deposited between ~ 1270 and ~ 723 Ma. Limited chronostratigraphic data have led to the broad correlation of the Bylot Supergroup with predominantly Neoproterozoic successions in northern and western Laurentia; yet, detailed correlation has been impossible given biostratigraphic and lithostratigraphic limitations. Carbon-isotope chemostratigraphy represents a potential dataset to constrain such interregional correlations. Carbon isotopic data from the Bylot Supergroup and broadly coeval successions from Somerset Island and northwest Greenland reveal distinct stratigraphic trends in δ 13 C, with intervals of moderate 13 C enrichment (+3.5 ± 1) punctuated by excursions to slightly negative values (-1.0 ± 1). Although the scale of the observed variation is muted relative to Neoproterozoic standards, the dissimilarity of values to those recorded in northwestern Laurentia suggests that these strata delineate a discrete depositional interval. Comparison of isotopic values with published data indicates that δ 13 C values between approximately -1.0 and +4.0 are characteristic of the interval between ~ 1300 and ~ 800 Ma. This pattern is distinct from that of younger Neoproterozoic successions, which typically record values >+5, and older Mesoproterozoic successions, which record values near 0, and suggests that these moderately positive values may be useful for broad time correlation. Compilation of new and published data permits the tentative reconstruction of a global Mesoproterozoic carbon isotopic curve. |
format |
Article in Journal/Newspaper |
author |
Kah, Linda C Sherman, Anne G Narbonne, Guy M Knoll, Andrew H Kaufman, Alan J |
spellingShingle |
Kah, Linda C Sherman, Anne G Narbonne, Guy M Knoll, Andrew H Kaufman, Alan J δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations |
author_facet |
Kah, Linda C Sherman, Anne G Narbonne, Guy M Knoll, Andrew H Kaufman, Alan J |
author_sort |
Kah, Linda C |
title |
δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations |
title_short |
δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations |
title_full |
δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations |
title_fullStr |
δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations |
title_full_unstemmed |
δ 13 C stratigraphy of the Proterozoic Bylot Supergroup, Baffin Island, Canada: implications for regional lithostratigraphic correlations |
title_sort |
δ 13 c stratigraphy of the proterozoic bylot supergroup, baffin island, canada: implications for regional lithostratigraphic correlations |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/e98-100 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-100 |
long_lat |
ENVELOPE(-93.500,-93.500,73.251,73.251) |
geographic |
Baffin Island Canada Greenland Somerset Island |
geographic_facet |
Baffin Island Canada Greenland Somerset Island |
genre |
Baffin Island Baffin Greenland Somerset Island |
genre_facet |
Baffin Island Baffin Greenland Somerset Island |
op_source |
Canadian Journal of Earth Sciences volume 36, issue 3, page 313-332 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e98-100 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
36 |
container_issue |
3 |
container_start_page |
313 |
op_container_end_page |
332 |
_version_ |
1812812251990589440 |