TY - UNPB
T1 - Comparative clumped isotope temperature relationships in freshwater carbonates
AU - Arnold, Alexandrea
AU - Mering, John
AU - Santi, Lauren
AU - Román-Palacios, Christian
AU - Petryshyn, Victoria
AU - Li, Huashu
AU - Mitsunaga, Bryce Akio
AU - Elliott, Ben
AU - Wilson, John
AU - Lucarelli, Jamie Kaaren
AU - Boch, Ronny
AU - Ibarra, Daniel Enrique
AU - Li, Lin
AU - Fan, Majie
AU - Kaufmann, Darrell
AU - Cohen, Andrew S
AU - Dunbar, Robert B
AU - Russell, James M
AU - Lalonde, Stefan
AU - Roy, Priyadarsi
AU - Dietzel, Martin
AU - Liu, Xingqi
AU - Chang, Fengming
AU - Eagle, Rob
AU - Tripati, Aradhna
PY - 2024/10
Y1 - 2024/10
N2 - Lacustrine, riverine and spring carbonates represent archives of terrestrial climates and their geochemistry has been used to study palaeoenvironments. Clumped isotope thermometry is an emerging tool that has been applied to freshwater carbonates. Limited work has been done to evaluate comparative relationships between clumped isotopes and temperature in different types of modern freshwater carbonates. This study assembles an extensive calibration data set with 135 samples of modern freshwater carbonates from 96 sites and constrains the relationship between independent observations of water temperature and the clumped isotopic composition of carbonates (denoted by Δ
47), including new measurements, and recalculates published data in accordance with current community-defined standard values. For temperature reconstruction, the study reports a composite freshwater calibration and material-specific calibrations for biogenic carbonates (freshwater gastropods and bivalves), fine-grained carbonate (e.g. micrites), biologically mediated carbonates (microbialites and tufas) and travertines. Material-specific calibration trends show a convergence of slopes that are in agreement with recently published syntheses, but statistically significant differences in intercepts occur between some materials (e.g. some biogenics, fine-grained carbonates). These differences may arise due to unresolved seasonal biases, kinetic isotope effects and/or varying degrees of biological influence. The impact of different calibrations is shown through application to new data for glacial and deglacial age travertines from Austria and published data sets. While material-specific calibrations may yield more accurate results for biogenic and fine-grained carbonate samples, the use of material-specific and the composite freshwater calibrations generally produces values within 1.0–1.5°C of each other, and typically fall within calibration uncertainty given limitations of precision.
AB - Lacustrine, riverine and spring carbonates represent archives of terrestrial climates and their geochemistry has been used to study palaeoenvironments. Clumped isotope thermometry is an emerging tool that has been applied to freshwater carbonates. Limited work has been done to evaluate comparative relationships between clumped isotopes and temperature in different types of modern freshwater carbonates. This study assembles an extensive calibration data set with 135 samples of modern freshwater carbonates from 96 sites and constrains the relationship between independent observations of water temperature and the clumped isotopic composition of carbonates (denoted by Δ
47), including new measurements, and recalculates published data in accordance with current community-defined standard values. For temperature reconstruction, the study reports a composite freshwater calibration and material-specific calibrations for biogenic carbonates (freshwater gastropods and bivalves), fine-grained carbonate (e.g. micrites), biologically mediated carbonates (microbialites and tufas) and travertines. Material-specific calibration trends show a convergence of slopes that are in agreement with recently published syntheses, but statistically significant differences in intercepts occur between some materials (e.g. some biogenics, fine-grained carbonates). These differences may arise due to unresolved seasonal biases, kinetic isotope effects and/or varying degrees of biological influence. The impact of different calibrations is shown through application to new data for glacial and deglacial age travertines from Austria and published data sets. While material-specific calibrations may yield more accurate results for biogenic and fine-grained carbonate samples, the use of material-specific and the composite freshwater calibrations generally produces values within 1.0–1.5°C of each other, and typically fall within calibration uncertainty given limitations of precision.
KW - carbonate clumped isotopes
KW - freshwater calibration
KW - lacustrine carbonates
KW - palaeoclimate reconstruction
KW - riverine carbonates
UR - http://www.scopus.com/inward/record.url?scp=85205908385&partnerID=8YFLogxK
U2 - 10.1002/dep2.312
DO - 10.1002/dep2.312
M3 - Preprint
T3 - Depositional Record
SP - 1
EP - 26
BT - Comparative clumped isotope temperature relationships in freshwater carbonates
ER -
