A revised age for the Kawakawa/Oruanui tephra, a key marker for the Last Glacial Maximum in New Zealand

QUATERNARY SCIENCE REVIEWS

卷:74

Article

Vandergoes, Marcus J.¹  Hogg, Alan G.²  Lowe, David J.³  Newnham, Rewi M.⁴  Denton, George H.^5,6  Southon, John⁷  Barrell, David J. A.⁸  Wilson, Colin J. N.⁴  McGlone, Matt S.⁹  Allan, Aidan S. R.⁴  Almond, Peter C.¹⁰  Petchey, Fiona²  Dabell, Kathleen²  Dieffenbacher-Krall, Ann C.⁶  Blaauw, Maarten¹¹ 

[1] GNS Sci, Lower Hutt 5040, New Zealand

[2] Univ Waikato, Radiocarbon Dating Lab, Hamilton 3240, New Zealand

[3] Univ Waikato, Dept Earth & Ocean Sci, Hamilton 3240, New Zealand

[4] Victoria Univ Wellington, Sch Geog Environm & Earth Sci, Wellington 6140, New Zealand

[5] Univ Maine, Dept Earth Sci, Orono, ME 04469 USA

[6] Univ Maine, Climate Change Inst, Orono, ME 04469 USA

[7] Univ Calif Irvine, Earth Syst Sci Dept, Irvine, CA 92697 USA

[8] GNS Sci, Dunedin 9054, New Zealand

[9] Landcare Res, Lincoln 7640, New Zealand

[10] Lincoln Univ, Soil & Phys Sci Dept, Lincoln 7647, New Zealand

[11] Queens Univ Belfast, Sch Geog Archaeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland

关键词: Last Glacial Maximum (LGM);    Isochron;    Kawakawa/Oruanui tephra;    Oruanui eruption;    Paleoclimate;    Tephrochronology;    Chronostratigraphy;    C-14 dating;    New Zealand;    NZ climate event stratigraphy;    Southwest Pacific;    Marine reservoir ages;   

DOI  :  10.1016/j.quascirev.2012.11.006

来源: Elsevier

【 摘 要 】

The Kawakawa/Oruanui tephra (KOT) is a key chronostratigraphic marker in terrestrial and marine deposits of the New Zealand (NZ) sector of the southwest Pacific. Erupted early during the Last Glacial Maximum (LGM), the wide distribution of the KOT enables inter-regional alignment of proxy records and facilitates comparison between NZ climatic variations and those from well-dated records elsewhere. We present 22 new radiocarbon ages for the MOT from sites and materials considered optimal for dating, and apply Bayesian statistical methods via OxCal4.1.7 that incorporate stratigraphic information to develop a new age probability model for ROT. The revised calibrated age, +/- 2 standard deviations, for the eruption of the KOT is 25,360 +/- 160 cal yr BP. The age revision provides a basis for refining marine reservoir ages for the LGM in the southwest Pacific. Published by Elsevier Ltd.

【 授权许可】

Free