Ampuero Grandez, Angela; Stríkis, Nicolas M; Meckler, Anna Nele; Krüger, Yves; Vuille, Mathias; Vonhof, Hubert B; Pasqualetto, Leonardo; Mayta, Victor; M Medina, N Melissa; Utida, Giselle; Zhang, Haiwei; Cheng, Hai; Edwards, R Lawrence; Travassos, Luiz; Piacsek, Patricia; Akabane, Thomas K; Cruz, Francisco William (2026): Microthermometry measurements of stalagmite the Rei do Mato stalagmite REI 7-2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.995231
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Published: 2026-06-05 • DOI registered: 2026-06-05
Abstract:
This dataset presents a cave paleotemperature reconstruction over the last glacial termination from stalagmite REI 7-2 from Rei do Mato Cave in Minas Gerais State, central-eastern South America (19.50°S, 44.28°W, 800 masl).
Microthermometric measurements were performed on a Linkam THMSG600 heating/cooling stage attached to an Olympus BX51 microscope equipped with a 100x long-working-distance objective (Olympus LMPLFLN 100x/0.8) and a Leica DFC350 FX digital camera for visual observation. Each cave temperature represents the average Th∞ of ~40 individual fluid inclusions. Outliers were excluded from the statistical analysis using a 4-MAD criterion.
Keyword(s):
Supplement to:
Ampuero, Angela; Stríkis, Nicolas M; Meckler, Anna Nele; Krüger, Yves; Vuille, Mathias; Vonhof, Hubert B; Pasqualetto, Leonardo; Mayta, Víctor C; M Medina, N Melissa; Utida, Giselle; Zhang, Haiwei; Cheng, Hai; Edwards, R Lawrence; Travassos, L E P; Piacsek, Patricia; Akabane, Thomas K; Cruz, Francisco William (2026): Rapid warming in South America during the last deglaciation. Nature Communications, https://doi.org/10.1038/s41467-026-74093-x
References:
Cheng, Hai; Edwards, R Lawrence; Shen, Chuan-Chou; Polyak, Victor J; Asmerom, Yemane; Woodhead, Jon D; Hellstrom, John C; Wang, Yongjin; Kong, Xinggong; Spötl, Christoph; Wang, Xianfeng; Alexander, E Calvin (2013): Improvements in 230Th dating, 230Th and 234U half-life values, and U–Th isotopic measurements by multi-collector inductively coupled plasma mass spectrometry. Earth and Planetary Science Letters, 371-372, 82-91, https://doi.org/10.1016/j.epsl.2013.04.006
Edwards, R Lawrence; Chen, J H; Wasserburg, Gerald J (1987): 238U-234U-230Th-232Th systematics and the precise measurement of time over the past 500,000 years. Earth and Planetary Science Letters, 81(2-3), 175-192, https://doi.org/10.1016/0012-821X(87)90154-3
Krüger, Yves; Marti, Dominik; Staub, Rita Hidalgo; Fleitmann, Dominik; Frenz, Martin (2011): Liquid–vapour homogenisation of fluid inclusions in stalagmites: Evaluation of a new thermometer for palaeoclimate research. Chemical Geology, 289(1-2), 39-47, https://doi.org/10.1016/j.chemgeo.2011.07.009
Krüger, Yves; Pasqualetto, Leonardo; Fernandez, Alvaro; Cobb, Kim M; Meckler, Anna Nele (2025): Tropical temperature evolution across two glacial cycles derived from speleothem fluid inclusion microthermometry. Climate of the Past, 21(9), 1553-1584, https://doi.org/10.5194/cp-21-1553-2025
Lambeck, Kurt; Rouby, Hélène; Purcell, Anthony; Sun, Y; Sambridge, Malcom (2014): Sea level and global ice volumes from the Last Glacial Maximum to the Holocene. Proceedings of the National Academy of Sciences, 111(43), 15296-15303, https://doi.org/10.1073/pnas.1411762111
Richards, David A (2003): Uranium-series Chronology and Environmental Applications of Speleothems. Reviews in Mineralogy & Geochemistry, 52(1), 407-460, https://doi.org/10.2113/0520407
Scholz, Denis; Hoffmann, Dirk L (2011): StalAge – An algorithm designed for construction of speleothem age models. Quaternary Geochronology, 6(3-4), 369-382, https://doi.org/10.1016/j.quageo.2011.02.002
Funding:
Coverage:
Latitude: -19.500000 * Longitude: -44.280000
Date/Time Start: 2024-07-31T00:00:00 * Date/Time End: 2024-08-20T00:00:00
Minimum DISTANCE: 0.55 cm * Maximum DISTANCE: 34.75 cm
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample ID | Sample ID | ||||
| 2 | DISTANCE | Distance | cm | Geocode – Distance from the top of the stalagmite | ||
| 3 | AGE | Age | ka BP | Mean values | Geocode – StalAge mean age (ka BP = thousands of years before 1950). | |
| 4 | Age model | Age model | ka | 95% Confidence interval, upper limit (CI up) | StalAge 95% CI (ka BP = thousands of years before 1950). | |
| 5 | Age model | Age model | ka | 95% Confidence interval, lower limit (CI low) | StalAge 95% CI (ka BP = thousands of years before 1950). | |
| 6 | Temperature, cave | T cave | °C | derived | From ~30-40 individual fluid inclusions analyses | |
| 7 | Temperature, cave, standard error | T cave std e | ± | Calculated | 2 standard errors of the mean | |
| 8 | Temperature, cave, standard deviation | T cave std dev | ± | Calculated | 1 standard deviation | |
| 9 | Sea level, reconstructed | Sea lev reconst | m | According to Lambeck et al. (2014) | ||
| 10 | Sea level, uncertainty | Sea lev unc | ± | According to Lambeck et al. (2014) | 2 standard deviation | |
| 11 | δ18O, calcite | δ18O cal | ‰ PDB | Average | Average value from samples taken within the same growth layer | |
| 12 | δ180, calcite, standard deviation | δ18O cal std dev | ± | Calculated | 1 standard deviation from samples within the same growth layer | |
| 13 | δ18O, drip water | δ18O drip H20 | ‰ PDB | Calculated | vs. VSMOW, corrected for ice sheet-related global changes in seawater delta 18O | |
| 14 | δ18O, drip water, standard deviation | δ18O drip H20 std dev | ± | Calculated | 1 standard deviation of the mean dripwater delta 18O calculated using Monte Carlo (N=100,000) | |
| 15 | DATE/TIME | Date/Time | Geocode |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
252 data points
Data
| 1 Sample ID | 2 Distance [cm] (Distance from the top of the ...) | 3 Age [ka BP] (StalAge mean age (ka BP = tho...) | 4 Age model [ka] (StalAge 95% CI (ka BP = thous...) | 5 Age model [ka] (StalAge 95% CI (ka BP = thous...) | 6 T cave [°C] (From ~30-40 individual fluid ...) | 7 T cave std e [±] (2 standard errors of the mean...) | 8 T cave std dev [±] (1 standard deviation, Calculated) | 9 Sea lev reconst [m] (According to Lambeck et al. (...) | 10 Sea lev unc [±] (2 standard deviation, Accordi...) | 11 δ18O cal [‰ PDB] (Average value from samples ta...) | 12 δ18O cal std dev [±] (1 standard deviation from sam...) | 13 δ18O drip H20 [‰ PDB] (vs. VSMOW, corrected for ice ...) | 14 δ18O drip H20 std dev [±] (1 standard deviation of the m...) | 15 Date/Time |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.55 | 9.306 | 9.451022 | 9.170044 | 20.16 | 0.41 | 1.27 | -29.0 | 0.7 | -4.4 | 0.2 | -4.5 | 0.2 | 2024-07-31 |
| 2 | 2.62 | 10.722 | 10.958140 | 10.418600 | 20.13 | 0.35 | 1.10 | -50.1 | 0.6 | -5.4 | 0.3 | -5.6 | 0.3 | 2024-08-01 |
| 3 | 5.23 | 11.686 | 11.746630 | 11.660820 | 19.68 | 0.38 | 1.19 | -61.4 | 0.3 | -6.4 | 0.0 | -6.8 | 0.1 | 2024-08-02 |
| 4 | 6.29 | 12.442 | 12.478030 | 12.389160 | 19.38 | 0.66 | 2.09 | -66.4 | 0.7 | -7.5 | 0.3 | -8.0 | 0.3 | 2024-08-03 |
| 5 | 6.75 | 12.731 | 12.782040 | 12.694200 | 19.12 | 0.45 | 1.38 | -68.2 | 0.6 | -7.7 | 0.1 | -8.3 | 0.2 | 2024-08-04 |
| 6 | 7.02 | 12.872 | 12.922400 | 12.835370 | 18.61 | 0.58 | 1.84 | -69.1 | 0.6 | -7.5 | 0.3 | -8.2 | 0.3 | 2024-08-05 |
| 7 | 7.48 | 13.090 | 13.187440 | 13.049390 | 17.18 | 0.22 | 0.70 | -70.7 | 0.5 | -6.9 | 0.1 | -7.9 | 0.1 | 2024-08-06 |
| 8 | 7.85 | 13.261 | 13.353950 | 13.208370 | 17.22 | 0.45 | 1.46 | -71.4 | 0.5 | -6.9 | 0.3 | -7.9 | 0.3 | 2024-08-07 |
| 9 | 9.05 | 13.766 | 13.891030 | 13.638800 | 17.37 | 0.31 | 0.98 | -74.6 | 0.8 | -6.6 | 0.3 | -7.6 | 0.3 | 2024-08-08 |
| 10 | 10.57 | 14.150 | 14.240920 | 14.048710 | 17.72 | 0.36 | 1.23 | -82.2 | 0.6 | -5.5 | 0.3 | -6.5 | 0.3 | 2024-08-09 |
| 11 | 13.37 | 15.106 | 15.190790 | 15.026450 | 17.29 | 0.37 | 1.20 | -99.1 | 1.9 | -8.4 | 0.0 | -9.6 | 0.1 | 2024-08-10 |
| 12 | 15.56 | 15.473 | 15.560660 | 15.391810 | 16.68 | 0.39 | 1.25 | -102.3 | 2.0 | -8.9 | 0.1 | -10.3 | 0.1 | 2024-08-11 |
| 13 | 16.82 | 16.015 | 16.082380 | 15.826950 | 15.84 | 0.30 | 0.94 | -107.5 | 1.7 | -8.3 | 0.2 | -9.9 | 0.2 | 2024-08-12 |
| 14 | 18.48 | 16.524 | 16.618890 | 16.439670 | 15.93 | 0.43 | 1.39 | -112.6 | 1.6 | -8.4 | 0.1 | -10.0 | 0.1 | 2024-08-13 |
| 15 | 20.35 | 17.230 | 17.277790 | 17.176670 | 15.16 | 0.41 | 1.29 | -116.6 | 1.2 | -8.9 | 0.0 | -10.7 | 0.1 | 2024-08-14 |
| 16 | 22.85 | 18.191 | 18.275660 | 18.016220 | 14.82 | 0.48 | 1.52 | -121.2 | 0.7 | -5.7 | 0.0 | -7.6 | 0.1 | 2024-08-15 |
| 17 | 26.26 | 19.504 | 19.549530 | 19.455700 | 15.00 | 0.40 | 1.26 | -130.5 | 0.9 | -6.4 | 0.2 | -8.3 | 0.2 | 2024-08-16 |
| 18 | 27.58 | 19.968 | 20.002260 | 19.927570 | 14.37 | 0.28 | 0.84 | -134.9 | 1.3 | -6.0 | 0.1 | -8.1 | 0.1 | 2024-08-17 |
| 19 | 29.08 | 20.493 | 20.527380 | 20.458170 | 14.83 | 0.43 | 1.38 | -137.5 | 1.1 | -5.8 | 0.2 | -7.9 | 0.2 | 2024-08-18 |
| 20 | 31.18 | 21.229 | 21.274040 | 21.183390 | 14.02 | 0.39 | 1.24 | -139.3 | 0.9 | -6.1 | 0.1 | -8.3 | 0.1 | 2024-08-19 |
| 21 | 34.75 | 22.481 | 22.560250 | 22.403530 | 13.86 | 0.29 | 0.92 | -136.2 | 0.7 | -5.4 | 0.1 | -7.5 | 0.1 | 2024-08-20 |