Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka

Moore, Christopher R.; Brooks, Mark J.; Goodyear, Albert C.; Ferguson, Terry A.; Perrotti, Angelina G.; Mitra, Siddhartha; Listecki, Ashlyn M.; King, Bailey C.; Mallinson, David J.; Lane, Chad S.; Kapp, Joshua D.; West, Allen; Carlson, David L.; Wolbach, Wendy S.; Them II, Theodore R.; Harris, M. Scott; Pyne-O’Donnell, Sean

Author

Moore, Christopher R.; Brooks, Mark J.; Goodyear, Albert C.; Ferguson, Terry A.; Perrotti, Angelina G.; Mitra, Siddhartha; Listecki, Ashlyn M.; King, Bailey C.; Mallinson, David J.; Lane, Chad S.; Kapp, Joshua D.; West, Allen; Carlson, David L.; Wolbach, Wendy S.; Them II, Theodore R.; Harris, M. Scott; Pyne-O’Donnell, Sean

Abstract

A widespread platinum (Pt) anomaly was recently documented in Greenland ice and 11 North American sedimentary sequences at the onset of the Younger Dryas (YD) event (~12,800 cal yr BP), consistent with the YD Impact Hypothesis. We report high-resolution analyses of a 1-meter section of a lake core from White Pond, South Carolina, USA. After developing a Bayesian age-depth model that brackets the late Pleistocene through early Holocene, we analyzed and quantified the following: (1) Pt and palladium (Pd) abundance, (2) geochemistry of 58 elements, (3) coprophilous spores, (4) sedimentary organic matter (OC and sedaDNA), (5) stable isotopes of C (δ13C) and N (δ15N), (6) soot, (7) aciniform carbon, (8) cryptotephra, (9) mercury (Hg), and (10) magnetic susceptibility. We identified large Pt and Pt/Pd anomalies within a 2-cm section dated to the YD onset (12,785 ± 58 cal yr BP). These anomalies precede a decline in coprophilous spores and correlate with an abrupt peak in soot and C/OC ratios, indicative of large-scale regional biomass burning. We also observed a relatively large excursion in δ15N values, indicating rapid climatic and environmental/hydrological changes at the YD onset. Our results are consistent with the YD Impact Hypothesis and impact-related environmental and ecological changes.

URI

http://hdl.handle.net/10342/8324

Date

2019-09-27

Citation:

APA:

Moore, Christopher R., & Brooks, Mark J., & Goodyear, Albert C., & Ferguson, Terry A., & Perrotti, Angelina G., & Mitra, Siddhartha, & Listecki, Ashlyn M., & King, Bailey C., & Mallinson, David J., & Lane, Chad S., & Kapp, Joshua D., & West, Allen, & Carlson, David L., & Wolbach, Wendy S., & Them II, Theodore R., & Harris, M. Scott, & Pyne-O’Donnell, Sean. (September 2019). Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka. Scientific Reports (Nature Publisher Group), (1-11. Retrieved from http://hdl.handle.net/10342/8324

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MLA:

Moore, Christopher R., and Brooks, Mark J., and Goodyear, Albert C., and Ferguson, Terry A., and Perrotti, Angelina G., and Mitra, Siddhartha, and Listecki, Ashlyn M., and King, Bailey C., and Mallinson, David J., and Lane, Chad S., and Kapp, Joshua D., and West, Allen, and Carlson, David L., and Wolbach, Wendy S., and Them II, Theodore R., and Harris, M. Scott, and Pyne-O’Donnell, Sean. "Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka". Scientific Reports (Nature Publisher Group). . (1-11.), September 2019. October 22, 2020. http://hdl.handle.net/10342/8324.

Chicago:

Moore, Christopher R. and Brooks, Mark J. and Goodyear, Albert C. and Ferguson, Terry A. and Perrotti, Angelina G. and Mitra, Siddhartha and Listecki, Ashlyn M. and King, Bailey C. and Mallinson, David J. and Lane, Chad S. and Kapp, Joshua D. and West, Allen and Carlson, David L. and Wolbach, Wendy S. and Them II, Theodore R. and Harris, M. Scott and Pyne-O’Donnell, Sean, "Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka," Scientific Reports (Nature Publisher Group) 9, no. (September 2019), http://hdl.handle.net/10342/8324 (accessed October 22, 2020).

AMA:

Moore, Christopher R., Brooks, Mark J., Goodyear, Albert C., Ferguson, Terry A., Perrotti, Angelina G., Mitra, Siddhartha, Listecki, Ashlyn M., King, Bailey C., Mallinson, David J., Lane, Chad S., Kapp, Joshua D., West, Allen, Carlson, David L., Wolbach, Wendy S., Them II, Theodore R., Harris, M. Scott, Pyne-O’Donnell, Sean. Sediment Cores from White Pond, South Carolina, contain a Platinum Anomaly, Pyrogenic Carbon Peak, and Coprophilous Spore Decline at 12.8 ka. Scientific Reports (Nature Publisher Group). September 2019; 9() 1-11. http://hdl.handle.net/10342/8324. Accessed October 22, 2020.

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