TY - JOUR
T1 - Neoproterozoic sedimentation and tectonics of the Laurentian midcontinent
T2 - Detrital zircon provenance of the Jacobsville Sandstone, Lake Superior Basin, USA and Canada
AU - Malone, David H.
AU - Stein, Carol A.
AU - Craddock, John P.
AU - Stein, Seth
AU - Malone, John E.
N1 - Funding Information:
We thank Everett Wood, Jessica Welch, Hannah Wirth, and Robert Wencel, Kacey Garber and Erica Craddock for help with field work mineral separation and geochronologic analysis. Mark Pearson collected the Jacobsville sample from Caribou Island. We also appreciate the efforts of the Arizona Laserchron Center staff. This work was supported by National Science Foundation grants EAR‐1148088 and EAR‐0952345, and by the Illinois State University Foundation. Brian Hampton and two anonymous reviewers were helpful in improving our paper. This work does not have any conflict of interest.
Funding Information:
We thank Everett Wood, Jessica Welch, Hannah Wirth, and Robert Wencel, Kacey Garber and Erica Craddock for help with field work mineral separation and geochronologic analysis. Mark Pearson collected the Jacobsville sample from Caribou Island. We also appreciate the efforts of the Arizona Laserchron Center staff. This work was supported by National Science Foundation grants EAR-1148088 and EAR-0952345, and by the Illinois State University Foundation. Brian Hampton and two anonymous reviewers were helpful in improving our paper. This work does not have any conflict of interest.
Publisher Copyright:
© 2020 John Wiley & Sons Ltd
PY - 2020/12
Y1 - 2020/12
N2 - The Neoproterozoic Jacobsville Sandstone outcrops along the south and east shores of Lake Superior, USA. It records intraplate deformation, some during its deposition and some afterwards, after the c. 1,100 Ma Midcontinent Rift (MCR) failed. Here we analyse 549 new detrital zircon ages from five sites, combined with prior data. Initially, local palaeo-topography controlled the source material, including the MCR-adjacent Penokean and Archaean rocks. With time the percentage of distal sources increased, including the c. 1,300–980 Ma Grenville orogeny and 1,480–1,360 Ma Granite-Rhyolite Province. Sites near the Keweenaw fault contain a significant number of MCR-age zircons, presumably uplifted to the surface, indicating fault motion during deposition. Only a relatively small percentage of 1,090–980 Ma Grenville-age zircons from collisions to the east are present, suggesting that they were not efficiently transported to the Lake Superior area. This work is innovative in that it is the first to use detrital zircon geochronology to understand the internal stratigraphy of the Jacobsville Sandstone, whose provenance provides new information about the Neoproterozoic tectonic and sedimentary history of Laurentia.
AB - The Neoproterozoic Jacobsville Sandstone outcrops along the south and east shores of Lake Superior, USA. It records intraplate deformation, some during its deposition and some afterwards, after the c. 1,100 Ma Midcontinent Rift (MCR) failed. Here we analyse 549 new detrital zircon ages from five sites, combined with prior data. Initially, local palaeo-topography controlled the source material, including the MCR-adjacent Penokean and Archaean rocks. With time the percentage of distal sources increased, including the c. 1,300–980 Ma Grenville orogeny and 1,480–1,360 Ma Granite-Rhyolite Province. Sites near the Keweenaw fault contain a significant number of MCR-age zircons, presumably uplifted to the surface, indicating fault motion during deposition. Only a relatively small percentage of 1,090–980 Ma Grenville-age zircons from collisions to the east are present, suggesting that they were not efficiently transported to the Lake Superior area. This work is innovative in that it is the first to use detrital zircon geochronology to understand the internal stratigraphy of the Jacobsville Sandstone, whose provenance provides new information about the Neoproterozoic tectonic and sedimentary history of Laurentia.
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U2 - 10.1111/ter.12481
DO - 10.1111/ter.12481
M3 - Article
AN - SCOPUS:85087206457
SN - 0954-4879
VL - 32
SP - 442
EP - 449
JO - Terra Nova
JF - Terra Nova
IS - 6
ER -