Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil)
Here we present a speleothem oxygen isotope (δ18O) and carbon isotope (δ13C) record from Angelica Cave in central Brazil (13.40°S, 46.23°W, ~585 m above sea level). The record is based on three stalagmite samples, AG1, AG2 and AG4. Ages of the samples were constrained by high-precision U-Th disequil...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.938676 2023-05-15T17:34:57+02:00 Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) Wong, Minn Lin Wang, Xianfeng Latrubesse, Edgardo M He, Shaoneng Bayer, Maximiliano LATITUDE: -13.400000 * LONGITUDE: -46.240000 * MINIMUM ELEVATION: 565.0 m * MAXIMUM ELEVATION: 565.0 m 2021-11-29 text/tab-separated-values, 1191 data points https://doi.pangaea.de/10.1594/PANGAEA.938676 https://doi.org/10.1594/PANGAEA.938676 en eng PANGAEA Wong, Minn Lin; Wang, Xianfeng; Latrubesse, Edgardo M; He, Shaoneng; Bayer, Maximiliano (2021): Variations in the South Atlantic Convergence Zone over the mid-to-late Holocene inferred from speleothem δ18O in central Brazil. Quaternary Science Reviews, 270, 107178, https://doi.org/10.1016/j.quascirev.2021.107178 Wong, Minn Lin; Wang, Xianfeng; Latrubesse, Edgardo M; He, Shaoneng; Bayer, Maximiliano (2021): Uranium-Thorium dating results of speleothems from Angelica Cave (central Brazil). PANGAEA, https://doi.org/10.1594/PANGAEA.938678 https://doi.pangaea.de/10.1594/PANGAEA.938676 https://doi.org/10.1594/PANGAEA.938676 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY AG AGE Angelica_Cave Brazil Isotope ratio mass spectrometer (IRMS) with a GasBench MULT Multiple investigations Sample code/label δ13C carbonate δ18O Dataset 2021 ftpangaea https://doi.org/10.1594/PANGAEA.938676 https://doi.org/10.1016/j.quascirev.2021.107178 https://doi.org/10.1594/PANGAEA.938678 2023-01-20T09:15:34Z Here we present a speleothem oxygen isotope (δ18O) and carbon isotope (δ13C) record from Angelica Cave in central Brazil (13.40°S, 46.23°W, ~585 m above sea level). The record is based on three stalagmite samples, AG1, AG2 and AG4. Ages of the samples were constrained by high-precision U-Th disequilibrium dating performed using a Thermo‐Fisher Scientific Neptune Plus multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS). The three samples have a combined temporal coverage of 0.1-6.8 kyr BP, roughly spanning the mid-to-late Holocene. Stable isotope values were measured using a GasBench coupled to a Delta-V isotope ratio mass spectrometer (IRMS) system. Angelica δ18O and δ13C values display an overall relatively flat trend with time. The Angelica Cave underlies the core of the South Atlantic Convergence zone (SACZ). The δ18O record can therefore be interpreted as proxy for SACZ rainfall intensity. The relatively flat δ18O trend over the past 6.8 kyr BP suggests that SACZ rainfall intensity remained largely invariant during the mid-to-late Holocene, despite the rising South Hemisphere summer insolation and increasing monsoon strength in the core South American Summer Monsoon zone. The Angelica δ18O record also shows no clear expression of abrupt North Atlantic events, such as the Little Ice Age, Medieval Climate Anomaly and Bond Events. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-46.240000,-46.240000,-13.400000,-13.400000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AG AGE Angelica_Cave Brazil Isotope ratio mass spectrometer (IRMS) with a GasBench MULT Multiple investigations Sample code/label δ13C carbonate δ18O |
spellingShingle |
AG AGE Angelica_Cave Brazil Isotope ratio mass spectrometer (IRMS) with a GasBench MULT Multiple investigations Sample code/label δ13C carbonate δ18O Wong, Minn Lin Wang, Xianfeng Latrubesse, Edgardo M He, Shaoneng Bayer, Maximiliano Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) |
topic_facet |
AG AGE Angelica_Cave Brazil Isotope ratio mass spectrometer (IRMS) with a GasBench MULT Multiple investigations Sample code/label δ13C carbonate δ18O |
description |
Here we present a speleothem oxygen isotope (δ18O) and carbon isotope (δ13C) record from Angelica Cave in central Brazil (13.40°S, 46.23°W, ~585 m above sea level). The record is based on three stalagmite samples, AG1, AG2 and AG4. Ages of the samples were constrained by high-precision U-Th disequilibrium dating performed using a Thermo‐Fisher Scientific Neptune Plus multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS). The three samples have a combined temporal coverage of 0.1-6.8 kyr BP, roughly spanning the mid-to-late Holocene. Stable isotope values were measured using a GasBench coupled to a Delta-V isotope ratio mass spectrometer (IRMS) system. Angelica δ18O and δ13C values display an overall relatively flat trend with time. The Angelica Cave underlies the core of the South Atlantic Convergence zone (SACZ). The δ18O record can therefore be interpreted as proxy for SACZ rainfall intensity. The relatively flat δ18O trend over the past 6.8 kyr BP suggests that SACZ rainfall intensity remained largely invariant during the mid-to-late Holocene, despite the rising South Hemisphere summer insolation and increasing monsoon strength in the core South American Summer Monsoon zone. The Angelica δ18O record also shows no clear expression of abrupt North Atlantic events, such as the Little Ice Age, Medieval Climate Anomaly and Bond Events. |
format |
Dataset |
author |
Wong, Minn Lin Wang, Xianfeng Latrubesse, Edgardo M He, Shaoneng Bayer, Maximiliano |
author_facet |
Wong, Minn Lin Wang, Xianfeng Latrubesse, Edgardo M He, Shaoneng Bayer, Maximiliano |
author_sort |
Wong, Minn Lin |
title |
Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) |
title_short |
Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) |
title_full |
Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) |
title_fullStr |
Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) |
title_full_unstemmed |
Stable isotope (δ18O,δ13C) results of speleothems from Angelica Cave (central Brazil) |
title_sort |
stable isotope (δ18o,δ13c) results of speleothems from angelica cave (central brazil) |
publisher |
PANGAEA |
publishDate |
2021 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.938676 https://doi.org/10.1594/PANGAEA.938676 |
op_coverage |
LATITUDE: -13.400000 * LONGITUDE: -46.240000 * MINIMUM ELEVATION: 565.0 m * MAXIMUM ELEVATION: 565.0 m |
long_lat |
ENVELOPE(-46.240000,-46.240000,-13.400000,-13.400000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Wong, Minn Lin; Wang, Xianfeng; Latrubesse, Edgardo M; He, Shaoneng; Bayer, Maximiliano (2021): Variations in the South Atlantic Convergence Zone over the mid-to-late Holocene inferred from speleothem δ18O in central Brazil. Quaternary Science Reviews, 270, 107178, https://doi.org/10.1016/j.quascirev.2021.107178 Wong, Minn Lin; Wang, Xianfeng; Latrubesse, Edgardo M; He, Shaoneng; Bayer, Maximiliano (2021): Uranium-Thorium dating results of speleothems from Angelica Cave (central Brazil). PANGAEA, https://doi.org/10.1594/PANGAEA.938678 https://doi.pangaea.de/10.1594/PANGAEA.938676 https://doi.org/10.1594/PANGAEA.938676 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.938676 https://doi.org/10.1016/j.quascirev.2021.107178 https://doi.org/10.1594/PANGAEA.938678 |
_version_ |
1766133947999191040 |