New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group
The Orosirian Period (2050–1800 Ma) of the Paleoproterozoic Era represents an interval between the Great Oxidation Event and Lomagundi-Jatuli Excursion, and the apparent environmental stability of the late Paleoproterozoic to mid-Mesoproterozoic (1800–1300 Ma). Here, we present stratigraphic data, c...
Published in: | Earth and Planetary Science Letters |
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ftboisestateu:oai:scholarworks.boisestate.edu:geo_facpubs-1476 2023-11-12T04:26:59+01:00 New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group Hodgskiss, Malcom S. W. Dagnaud, Olivia M. J. Frost, Jamie L. Halverson, Galen P. Schmitz, Mark D. Swanson-Hysell, Nicholas L. Sperling, Erik A. 2019-08-15T07:00:00Z https://scholarworks.boisestate.edu/geo_facpubs/472 https://doi.org/10.1016/j.epsl.2019.05.023 unknown ScholarWorks https://scholarworks.boisestate.edu/geo_facpubs/472 https://doi.org/10.1016/j.epsl.2019.05.023 Geosciences Faculty Publications and Presentations Belcher group Paleoproterozoic Orosirian carbon cycle Cyanobacteria Nuna Earth Sciences Geophysics and Seismology text 2019 ftboisestateu https://doi.org/10.1016/j.epsl.2019.05.023 2023-10-20T00:12:57Z The Orosirian Period (2050–1800 Ma) of the Paleoproterozoic Era represents an interval between the Great Oxidation Event and Lomagundi-Jatuli Excursion, and the apparent environmental stability of the late Paleoproterozoic to mid-Mesoproterozoic (1800–1300 Ma). Here, we present stratigraphic data, carbon isotope chemostratigraphy, element abundances, and U–Pb zircon depositional ages from the Belcher Group in subarctic Canada, providing an unparallelled global reference section for the Orosirian Period. U–Pb dates of 2018.5 ± 1.0 Ma and 2015.4 ± 1.8 Ma for two tuffs in the Kasegalik Formation (lowest Belcher Group) provide the first robust age constraints for Earth’s earliest unambiguous cyanobacterial fossil, Eoentophysalis belcherensis. A tuffaceous shale ∼4 km stratigraphically higher, at the contact of the Flaherty and Omarolluk formations (1854.2 ± 1.6 Ma), provides an age for foreland basin development associated with the collision of the Superior and Hearne cratons. Carbonate carbon isotope data show smooth fluctuations ranging from −2.3 to +3.6%, reaching a maximum near ca. 1.88 Ga. This trend toward heavier carbon isotope values is interpreted as the result of global orogenesis during Nuna assembly that elevated nutrient supply and sedimentation rates, leading to an increase in the proportion of organic carbon burial relative to carbonate carbon burial. Text Subarctic Boise State University: Scholar Works Belcher ENVELOPE(-94.172,-94.172,57.936,57.936) Canada Earth and Planetary Science Letters 520 141 152 |
institution |
Open Polar |
collection |
Boise State University: Scholar Works |
op_collection_id |
ftboisestateu |
language |
unknown |
topic |
Belcher group Paleoproterozoic Orosirian carbon cycle Cyanobacteria Nuna Earth Sciences Geophysics and Seismology |
spellingShingle |
Belcher group Paleoproterozoic Orosirian carbon cycle Cyanobacteria Nuna Earth Sciences Geophysics and Seismology Hodgskiss, Malcom S. W. Dagnaud, Olivia M. J. Frost, Jamie L. Halverson, Galen P. Schmitz, Mark D. Swanson-Hysell, Nicholas L. Sperling, Erik A. New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group |
topic_facet |
Belcher group Paleoproterozoic Orosirian carbon cycle Cyanobacteria Nuna Earth Sciences Geophysics and Seismology |
description |
The Orosirian Period (2050–1800 Ma) of the Paleoproterozoic Era represents an interval between the Great Oxidation Event and Lomagundi-Jatuli Excursion, and the apparent environmental stability of the late Paleoproterozoic to mid-Mesoproterozoic (1800–1300 Ma). Here, we present stratigraphic data, carbon isotope chemostratigraphy, element abundances, and U–Pb zircon depositional ages from the Belcher Group in subarctic Canada, providing an unparallelled global reference section for the Orosirian Period. U–Pb dates of 2018.5 ± 1.0 Ma and 2015.4 ± 1.8 Ma for two tuffs in the Kasegalik Formation (lowest Belcher Group) provide the first robust age constraints for Earth’s earliest unambiguous cyanobacterial fossil, Eoentophysalis belcherensis. A tuffaceous shale ∼4 km stratigraphically higher, at the contact of the Flaherty and Omarolluk formations (1854.2 ± 1.6 Ma), provides an age for foreland basin development associated with the collision of the Superior and Hearne cratons. Carbonate carbon isotope data show smooth fluctuations ranging from −2.3 to +3.6%, reaching a maximum near ca. 1.88 Ga. This trend toward heavier carbon isotope values is interpreted as the result of global orogenesis during Nuna assembly that elevated nutrient supply and sedimentation rates, leading to an increase in the proportion of organic carbon burial relative to carbonate carbon burial. |
format |
Text |
author |
Hodgskiss, Malcom S. W. Dagnaud, Olivia M. J. Frost, Jamie L. Halverson, Galen P. Schmitz, Mark D. Swanson-Hysell, Nicholas L. Sperling, Erik A. |
author_facet |
Hodgskiss, Malcom S. W. Dagnaud, Olivia M. J. Frost, Jamie L. Halverson, Galen P. Schmitz, Mark D. Swanson-Hysell, Nicholas L. Sperling, Erik A. |
author_sort |
Hodgskiss, Malcom S. W. |
title |
New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group |
title_short |
New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group |
title_full |
New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group |
title_fullStr |
New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group |
title_full_unstemmed |
New Insights on the Orosirian Carbon Cycle, Early Cyanobacteria, and the Assembly of Laurentia from the Paleoproterozoic Belcher Group |
title_sort |
new insights on the orosirian carbon cycle, early cyanobacteria, and the assembly of laurentia from the paleoproterozoic belcher group |
publisher |
ScholarWorks |
publishDate |
2019 |
url |
https://scholarworks.boisestate.edu/geo_facpubs/472 https://doi.org/10.1016/j.epsl.2019.05.023 |
long_lat |
ENVELOPE(-94.172,-94.172,57.936,57.936) |
geographic |
Belcher Canada |
geographic_facet |
Belcher Canada |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Geosciences Faculty Publications and Presentations |
op_relation |
https://scholarworks.boisestate.edu/geo_facpubs/472 https://doi.org/10.1016/j.epsl.2019.05.023 |
op_doi |
https://doi.org/10.1016/j.epsl.2019.05.023 |
container_title |
Earth and Planetary Science Letters |
container_volume |
520 |
container_start_page |
141 |
op_container_end_page |
152 |
_version_ |
1782340756346765312 |