FN Archimer Export Format
PT J
TI Mass 47 clumped isotope signatures in modern lacustrine authigenic carbonates in Western China and other regions and implications for paleotemperature and paleoelevation reconstructions
BT 
AF Li, Huashu
   Liu, Xingqi
   Arnold, Alexandrea
   Elliott, Ben
   Flores, Randy
   Kelley, Anne Marie
   Tripati, Aradhna
AS 1:1;2:1;3:2;4:2;5:2;6:2;7:2,3,4;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 College of Resource Environment and Tourism, Capital Normal University, 100048 Beijing, PR China
   Department of Earth, Planetary, and Space Sciences, Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, Center for Diverse Leadership in Science, University of California, Los Angeles, CA 90095, USA
   European Institute of Marine Sciences (IUEM), Université de Brest, UMR 6538, Domaines Océaniques, Rue Dumont D'Urville, 29280 Plouzané, France
   IFREMER, Laboratoire Géophysique et enregistrement Sédimentaire, 29280 Plouzané, France
C2 UNIV CAPITAL NORMAL, CHINA
   UNIV CALIF LOS ANGELES, USA
   UBO, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GM-LCG
UM LGO
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 5.785
TC 15
UR https://archimer.ifremer.fr/doc/00683/79478/99888.pdf
LA English
DT Article
DE ;clumped isotope;lacustrine authigenic carbonate;paleotemperature reconstruction;paleoclimate;paleoaltimetry
AB With the development of the carbonate clumped isotope () geothermometer, many –temperature calibrations based on biogenic and abiogenic carbonates have been generated in recent years. However, there is still not a robust empirical calibration relationship derived from lacustrine authigenic carbonates that can be used to calculate lake water temperatures from values. In this study, we present a new calibration dataset that is comprised of measurements of the clumped isotope composition of 33 lacustrine authigenic carbonates collected from terminal lakes primarily in Western China that cover a substantial altitudinal gradient, and 5 samples from other regions. These data allow us to directly derive a temperature calibration for lacustrine authigenic carbonates. Our results show a robust correlation between modern lacustrine authigenic carbonate clumped isotope composition (Δ47carb) values and independently measured mean summer water surface temperatures (Twater) (ranging from 9.8 to 26.0 °C), which confirms the utility of mass-47 clumped isotope measurements of lacustrine authigenic carbonates as a lake water temperature indicator and allows for the derivation of the following calibration equation: Δ47carb (‰) = 0.0521 ± 0.0071 × 106/ (K) + 0.0904 ± 0.0870 (R2 = 0.6224, P < 0.0001, n = 33). We observe that Δ47carb is significantly correlated to lake elevation at 35°N from 270 to 5,156 m a.s.l. The change in –derived water temperature differences through elevation gradients (i.e. lapse rate) is around 3.2 °C/km. We do not observe a significant correlation between Δ47carb and carbonate oxygen isotopic composition or independently measured lake surface water oxygen isotopic composition. Additionally, in our dataset, we find that water chemistry, carbonate precipitation rate, carbonate content and mineral-specific differences do not significantly affect Δ47carb values. Hence, the mass-47 clumped isotope signal of lacustrine authigenic carbonate can be used in paleotemperature and paleoaltimetry studies if post-depositional diagenesis did not modify the isotopic composition. 
PY 2021
PD MAY
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier BV
VL 562
UT 000636736200011
DI 10.1016/j.epsl.2021.116840
ID 79478
ER

EF