A Late Paleocene age for Greenland's Hiawatha impact structure

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

A Late Paleocene age for Greenland's Hiawatha impact structure. / Kenny, Gavin G.; Hyde, William R.; Storey, Michael; Garde, Adam A.; Whitehouse, Martin J.; Beck, Pierre; Johansson, Leif; Søndergaard, Anne Sofie; Bjørk, Anders A.; MacGregor, Joseph A.; Khan, Shfaqat A.; Mouginot, Jérémie; Johnson, Brandon C.; Silber, Elizabeth A.; Wielandt, Daniel K. P.; Kjær, Kurt H.; Larsen, Nicolaj K.

In: Science Advances, Vol. 8, No. 10, eabm2434, 2022.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Kenny, GG, Hyde, WR, Storey, M, Garde, AA, Whitehouse, MJ, Beck, P, Johansson, L, Søndergaard, AS, Bjørk, AA, MacGregor, JA, Khan, SA, Mouginot, J, Johnson, BC, Silber, EA, Wielandt, DKP, Kjær, KH & Larsen, NK 2022, 'A Late Paleocene age for Greenland's Hiawatha impact structure', Science Advances, vol. 8, no. 10, eabm2434. https://doi.org/10.1126/sciadv.abm2434

APA

Kenny, G. G., Hyde, W. R., Storey, M., Garde, A. A., Whitehouse, M. J., Beck, P., Johansson, L., Søndergaard, A. S., Bjørk, A. A., MacGregor, J. A., Khan, S. A., Mouginot, J., Johnson, B. C., Silber, E. A., Wielandt, D. K. P., Kjær, K. H., & Larsen, N. K. (2022). A Late Paleocene age for Greenland's Hiawatha impact structure. Science Advances, 8(10), [eabm2434]. https://doi.org/10.1126/sciadv.abm2434

Vancouver

Kenny GG, Hyde WR, Storey M, Garde AA, Whitehouse MJ, Beck P et al. A Late Paleocene age for Greenland's Hiawatha impact structure. Science Advances. 2022;8(10). eabm2434. https://doi.org/10.1126/sciadv.abm2434

Author

Kenny, Gavin G. ; Hyde, William R. ; Storey, Michael ; Garde, Adam A. ; Whitehouse, Martin J. ; Beck, Pierre ; Johansson, Leif ; Søndergaard, Anne Sofie ; Bjørk, Anders A. ; MacGregor, Joseph A. ; Khan, Shfaqat A. ; Mouginot, Jérémie ; Johnson, Brandon C. ; Silber, Elizabeth A. ; Wielandt, Daniel K. P. ; Kjær, Kurt H. ; Larsen, Nicolaj K. / A Late Paleocene age for Greenland's Hiawatha impact structure. In: Science Advances. 2022 ; Vol. 8, No. 10.

Bibtex

@article{68dea451b87049cfa850954a3c14f767,
title = "A Late Paleocene age for Greenland's Hiawatha impact structure",
abstract = "The ~31-km-wide Hiawatha structure, located beneath Hiawatha Glacier in northwestern Greenland, has been proposed as an impact structure that may have formed after the Pleistocene inception of the Greenland Ice Sheet. To date the structure, we conducted 40Ar/39Ar analyses on glaciofluvial sand and U-Pb analyses on zircon separated from glaciofluvial pebbles of impact melt rock, all sampled immediately downstream of Hiawatha Glacier. Unshocked zircon in the impact melt rocks dates to ~1915 million years (Ma), consistent with felsic intrusions found in local bedrock. The 40Ar/39Ar data indicate Late Paleocene resetting and shocked zircon dates to 57.99 ± 0.54 Ma, which we interpret as the impact age. Consequently, the Hiawatha impact structure far predates Pleistocene glaciation and is unrelated to either the Paleocene-Eocene Thermal Maximum or flood basalt volcanism in east Greenland. However, it was contemporaneous with the Paleocene Carbon Isotope Maximum, although the impact's exact paleoenvironmental and climatic significance awaits further investigation.",
author = "Kenny, {Gavin G.} and Hyde, {William R.} and Michael Storey and Garde, {Adam A.} and Whitehouse, {Martin J.} and Pierre Beck and Leif Johansson and S{\o}ndergaard, {Anne Sofie} and Bj{\o}rk, {Anders A.} and MacGregor, {Joseph A.} and Khan, {Shfaqat A.} and J{\'e}r{\'e}mie Mouginot and Johnson, {Brandon C.} and Silber, {Elizabeth A.} and Wielandt, {Daniel K. P.} and Kj{\ae}r, {Kurt H.} and Larsen, {Nicolaj K.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2022 The Authors",
year = "2022",
doi = "10.1126/sciadv.abm2434",
language = "English",
volume = "8",
journal = "Science advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science",
number = "10",

}

RIS

TY - JOUR

T1 - A Late Paleocene age for Greenland's Hiawatha impact structure

AU - Kenny, Gavin G.

AU - Hyde, William R.

AU - Storey, Michael

AU - Garde, Adam A.

AU - Whitehouse, Martin J.

AU - Beck, Pierre

AU - Johansson, Leif

AU - Søndergaard, Anne Sofie

AU - Bjørk, Anders A.

AU - MacGregor, Joseph A.

AU - Khan, Shfaqat A.

AU - Mouginot, Jérémie

AU - Johnson, Brandon C.

AU - Silber, Elizabeth A.

AU - Wielandt, Daniel K. P.

AU - Kjær, Kurt H.

AU - Larsen, Nicolaj K.

N1 - Publisher Copyright: Copyright © 2022 The Authors

PY - 2022

Y1 - 2022

N2 - The ~31-km-wide Hiawatha structure, located beneath Hiawatha Glacier in northwestern Greenland, has been proposed as an impact structure that may have formed after the Pleistocene inception of the Greenland Ice Sheet. To date the structure, we conducted 40Ar/39Ar analyses on glaciofluvial sand and U-Pb analyses on zircon separated from glaciofluvial pebbles of impact melt rock, all sampled immediately downstream of Hiawatha Glacier. Unshocked zircon in the impact melt rocks dates to ~1915 million years (Ma), consistent with felsic intrusions found in local bedrock. The 40Ar/39Ar data indicate Late Paleocene resetting and shocked zircon dates to 57.99 ± 0.54 Ma, which we interpret as the impact age. Consequently, the Hiawatha impact structure far predates Pleistocene glaciation and is unrelated to either the Paleocene-Eocene Thermal Maximum or flood basalt volcanism in east Greenland. However, it was contemporaneous with the Paleocene Carbon Isotope Maximum, although the impact's exact paleoenvironmental and climatic significance awaits further investigation.

AB - The ~31-km-wide Hiawatha structure, located beneath Hiawatha Glacier in northwestern Greenland, has been proposed as an impact structure that may have formed after the Pleistocene inception of the Greenland Ice Sheet. To date the structure, we conducted 40Ar/39Ar analyses on glaciofluvial sand and U-Pb analyses on zircon separated from glaciofluvial pebbles of impact melt rock, all sampled immediately downstream of Hiawatha Glacier. Unshocked zircon in the impact melt rocks dates to ~1915 million years (Ma), consistent with felsic intrusions found in local bedrock. The 40Ar/39Ar data indicate Late Paleocene resetting and shocked zircon dates to 57.99 ± 0.54 Ma, which we interpret as the impact age. Consequently, the Hiawatha impact structure far predates Pleistocene glaciation and is unrelated to either the Paleocene-Eocene Thermal Maximum or flood basalt volcanism in east Greenland. However, it was contemporaneous with the Paleocene Carbon Isotope Maximum, although the impact's exact paleoenvironmental and climatic significance awaits further investigation.

U2 - 10.1126/sciadv.abm2434

DO - 10.1126/sciadv.abm2434

M3 - Journal article

C2 - 35263140

AN - SCOPUS:85126080454

VL - 8

JO - Science advances

JF - Science advances

SN - 2375-2548

IS - 10

M1 - eabm2434

ER -

ID: 300904966