Amino acid racemization in mono-specific foraminifera from Quaternary deep-sea sediments

Darrell S Kaufman, Katherine Cooper, Richard Behl, Katharina Billups, Jordon Bright, Karleen Gardner, Paul Hearty, Martin Jakobsson, Isabel Mendes, Michael O'Leary, Leonid Polyak, Tine Rasmussen, Francisca Rosa, Matthew Schmidt

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The deep-sea environment is among the most stable on Earth, making it well suited for amino acid geochronology. Foraminifera with calcareous tests are distributed across the World Ocean and are often recovered in sufficient abundance from sediment cores to derive robust mean amino acid D/L values of multiple replicates from each stratigraphic level. The extent of racemization (D/L) can be compared with independent age control, which in most cases is based on correlation with global marine oxygen-isotope stages and radiocarbon ages from the same stratigraphic levels. In this study, we report the results of amino acid racemization analysis of multiple foraminifera species from well-dated sediment cores taken from the Pacific, Atlantic, and Arctic oceans. The composite of results analyzed to date (179 samples, each composed of an average of 8.6 subsamples = 1531 analyses) show that D/L values generally increase systematically down core, and are similar for samples of comparable ages from different deep-sea sites. Previously published equations that relate D/L values of aspartic and glutamic acids to post-depositional temperature and sample age for Pulleniatina obliquiloculata generally conform to the D/L trends for species analyzed in this study. Laboratory heating experiments were used to quantify the difference in the rate of racemization between P. obliquiloculata and other taxa. For example, aspartic acid in P. obliquiloculata racemizes an average of 12-16% faster than in the common high-latitude species, Neogloboquadrina pachyderma (s). Apparently, the unexpectedly high D/L values previously reported for N. pachyderma (s) older than 35 ka from the Arctic Ocean cannot be attributed to taxonomic effects.

Original languageEnglish (US)
Pages (from-to)50-61
Number of pages12
JournalQuaternary Geochronology
Volume16
DOIs
StatePublished - Apr 2013

Fingerprint

racemization
deep-sea sediment
foraminifera
amino acid
sediment core
deep sea
aspartic acid
geochronology
oxygen isotope
heating
acid
ocean
experiment
temperature
Arctic Ocean

Keywords

  • Amino acid racemization
  • Foraminifera
  • Marine sediment
  • Quaternary geochronology

ASJC Scopus subject areas

  • Geology
  • Earth and Planetary Sciences (miscellaneous)
  • Stratigraphy

Cite this

Amino acid racemization in mono-specific foraminifera from Quaternary deep-sea sediments. / Kaufman, Darrell S; Cooper, Katherine; Behl, Richard; Billups, Katharina; Bright, Jordon; Gardner, Karleen; Hearty, Paul; Jakobsson, Martin; Mendes, Isabel; O'Leary, Michael; Polyak, Leonid; Rasmussen, Tine; Rosa, Francisca; Schmidt, Matthew.

In: Quaternary Geochronology, Vol. 16, 04.2013, p. 50-61.

Research output: Contribution to journalArticle

Kaufman, DS, Cooper, K, Behl, R, Billups, K, Bright, J, Gardner, K, Hearty, P, Jakobsson, M, Mendes, I, O'Leary, M, Polyak, L, Rasmussen, T, Rosa, F & Schmidt, M 2013, 'Amino acid racemization in mono-specific foraminifera from Quaternary deep-sea sediments', Quaternary Geochronology, vol. 16, pp. 50-61. https://doi.org/10.1016/j.quageo.2012.07.006
Kaufman, Darrell S ; Cooper, Katherine ; Behl, Richard ; Billups, Katharina ; Bright, Jordon ; Gardner, Karleen ; Hearty, Paul ; Jakobsson, Martin ; Mendes, Isabel ; O'Leary, Michael ; Polyak, Leonid ; Rasmussen, Tine ; Rosa, Francisca ; Schmidt, Matthew. / Amino acid racemization in mono-specific foraminifera from Quaternary deep-sea sediments. In: Quaternary Geochronology. 2013 ; Vol. 16. pp. 50-61.
@article{71033d2ae24044faa4a652a230063c64,
title = "Amino acid racemization in mono-specific foraminifera from Quaternary deep-sea sediments",
abstract = "The deep-sea environment is among the most stable on Earth, making it well suited for amino acid geochronology. Foraminifera with calcareous tests are distributed across the World Ocean and are often recovered in sufficient abundance from sediment cores to derive robust mean amino acid D/L values of multiple replicates from each stratigraphic level. The extent of racemization (D/L) can be compared with independent age control, which in most cases is based on correlation with global marine oxygen-isotope stages and radiocarbon ages from the same stratigraphic levels. In this study, we report the results of amino acid racemization analysis of multiple foraminifera species from well-dated sediment cores taken from the Pacific, Atlantic, and Arctic oceans. The composite of results analyzed to date (179 samples, each composed of an average of 8.6 subsamples = 1531 analyses) show that D/L values generally increase systematically down core, and are similar for samples of comparable ages from different deep-sea sites. Previously published equations that relate D/L values of aspartic and glutamic acids to post-depositional temperature and sample age for Pulleniatina obliquiloculata generally conform to the D/L trends for species analyzed in this study. Laboratory heating experiments were used to quantify the difference in the rate of racemization between P. obliquiloculata and other taxa. For example, aspartic acid in P. obliquiloculata racemizes an average of 12-16{\%} faster than in the common high-latitude species, Neogloboquadrina pachyderma (s). Apparently, the unexpectedly high D/L values previously reported for N. pachyderma (s) older than 35 ka from the Arctic Ocean cannot be attributed to taxonomic effects.",
keywords = "Amino acid racemization, Foraminifera, Marine sediment, Quaternary geochronology",
author = "Kaufman, {Darrell S} and Katherine Cooper and Richard Behl and Katharina Billups and Jordon Bright and Karleen Gardner and Paul Hearty and Martin Jakobsson and Isabel Mendes and Michael O'Leary and Leonid Polyak and Tine Rasmussen and Francisca Rosa and Matthew Schmidt",
year = "2013",
month = "4",
doi = "10.1016/j.quageo.2012.07.006",
language = "English (US)",
volume = "16",
pages = "50--61",
journal = "Quaternary Geochronology",
issn = "1871-1014",
publisher = "Elsevier",

}

TY - JOUR

T1 - Amino acid racemization in mono-specific foraminifera from Quaternary deep-sea sediments

AU - Kaufman, Darrell S

AU - Cooper, Katherine

AU - Behl, Richard

AU - Billups, Katharina

AU - Bright, Jordon

AU - Gardner, Karleen

AU - Hearty, Paul

AU - Jakobsson, Martin

AU - Mendes, Isabel

AU - O'Leary, Michael

AU - Polyak, Leonid

AU - Rasmussen, Tine

AU - Rosa, Francisca

AU - Schmidt, Matthew

PY - 2013/4

Y1 - 2013/4

N2 - The deep-sea environment is among the most stable on Earth, making it well suited for amino acid geochronology. Foraminifera with calcareous tests are distributed across the World Ocean and are often recovered in sufficient abundance from sediment cores to derive robust mean amino acid D/L values of multiple replicates from each stratigraphic level. The extent of racemization (D/L) can be compared with independent age control, which in most cases is based on correlation with global marine oxygen-isotope stages and radiocarbon ages from the same stratigraphic levels. In this study, we report the results of amino acid racemization analysis of multiple foraminifera species from well-dated sediment cores taken from the Pacific, Atlantic, and Arctic oceans. The composite of results analyzed to date (179 samples, each composed of an average of 8.6 subsamples = 1531 analyses) show that D/L values generally increase systematically down core, and are similar for samples of comparable ages from different deep-sea sites. Previously published equations that relate D/L values of aspartic and glutamic acids to post-depositional temperature and sample age for Pulleniatina obliquiloculata generally conform to the D/L trends for species analyzed in this study. Laboratory heating experiments were used to quantify the difference in the rate of racemization between P. obliquiloculata and other taxa. For example, aspartic acid in P. obliquiloculata racemizes an average of 12-16% faster than in the common high-latitude species, Neogloboquadrina pachyderma (s). Apparently, the unexpectedly high D/L values previously reported for N. pachyderma (s) older than 35 ka from the Arctic Ocean cannot be attributed to taxonomic effects.

AB - The deep-sea environment is among the most stable on Earth, making it well suited for amino acid geochronology. Foraminifera with calcareous tests are distributed across the World Ocean and are often recovered in sufficient abundance from sediment cores to derive robust mean amino acid D/L values of multiple replicates from each stratigraphic level. The extent of racemization (D/L) can be compared with independent age control, which in most cases is based on correlation with global marine oxygen-isotope stages and radiocarbon ages from the same stratigraphic levels. In this study, we report the results of amino acid racemization analysis of multiple foraminifera species from well-dated sediment cores taken from the Pacific, Atlantic, and Arctic oceans. The composite of results analyzed to date (179 samples, each composed of an average of 8.6 subsamples = 1531 analyses) show that D/L values generally increase systematically down core, and are similar for samples of comparable ages from different deep-sea sites. Previously published equations that relate D/L values of aspartic and glutamic acids to post-depositional temperature and sample age for Pulleniatina obliquiloculata generally conform to the D/L trends for species analyzed in this study. Laboratory heating experiments were used to quantify the difference in the rate of racemization between P. obliquiloculata and other taxa. For example, aspartic acid in P. obliquiloculata racemizes an average of 12-16% faster than in the common high-latitude species, Neogloboquadrina pachyderma (s). Apparently, the unexpectedly high D/L values previously reported for N. pachyderma (s) older than 35 ka from the Arctic Ocean cannot be attributed to taxonomic effects.

KW - Amino acid racemization

KW - Foraminifera

KW - Marine sediment

KW - Quaternary geochronology

UR - http://www.scopus.com/inward/record.url?scp=84877113496&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877113496&partnerID=8YFLogxK

U2 - 10.1016/j.quageo.2012.07.006

DO - 10.1016/j.quageo.2012.07.006

M3 - Article

AN - SCOPUS:84877113496

VL - 16

SP - 50

EP - 61

JO - Quaternary Geochronology

JF - Quaternary Geochronology

SN - 1871-1014

ER -