Ota, Hayu; Kuroda, Junichiro; Orihashi, Yuji; Schmitz, Mark D; Takashima, Reishi (2026): Low-resolution osmium and rhenium concentrations from mudstone samples of the Kawaruppu section [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.994127
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Published: 2026-05-19 • DOI registered: 2026-05-19
Abstract:
This dataset contains osmium isotope ratios and osmium and rhenium concentrations from mudstone samples collected from the low-resolution interval of the Kawaruppu section, Nemuro Group, Hokkaido, Japan. The data cover the Upper Cretaceous-lower Paleogene interval across the Cretaceous-Paleogene boundary and were compiled for an integrated stratigraphic investigation of the boundary interval. Osmium isotope ratios and Os concentrations were measured by negative thermal ionization mass spectrometry (N-TIMS; TRITON, Thermo Fisher Scientific) and rhenium concentrations were measured by inductively coupled plasma quadrupole mass spectrometry (ICP-QMS; iCAP Q, ThermoFisher Scientific) at Japan Agency for Marine-Earth Science and Technology (JAMSTEC).
Supplement to:
Ota, Hayu; Kuroda, Junichiro; Hayashi, Keiichi; Hoshi, Hiroyuki; Sawada, Ken; Hosogaya, Kohei; Nishi, Hiroshi; Ishikawa, Akira; Suzuki, Katsuhiko; Ikeda, Masashi A; Orihashi, Yuji; Schmitz, Mark; Gyawali, Babu Ram; Matsumoto, Hironao; Takashima, Reishi (2026): The Chicxulub impact signature in East Asia. Communications Earth & Environment, https://doi.org/10.1038/s43247-026-03602-z
Funding:
Japan Society for the Promotion of Science (JSPS), grant/award no. 17K05674: High resolution age model and paleoenvironmental change for K/Pg boundary
Japan Society for the Promotion of Science (JSPS), grant/award no. 18KK0091: Improvement of Cretaceous Geologic Time Scale
Japan Society for the Promotion of Science (JSPS), grant/award no. 21H04503: Environmental changes during the Latest Cretaceous Mass Extinction Event recorded in the complete K/Pg boundary sequence discovered firstly in East Asia
Japan Society for the Promotion of Science (JSPS), grant/award no. 22H01342: The Cretaceous-Paleogene Boundary in the Southern Hemisphere: Osmium isotopic record to fingerprint flood basalt volcanism
Japan Society for the Promotion of Science (JSPS), grant/award no. 22K18426: Linkage of the Earth's tipping points and the subseafloor biosphere
Japan Society for the Promotion of Science (JSPS), grant/award no. 23H00153: Analysis of internal Earth nitrogen using pupulin nitrogen isotope ratio
Japan Society for the Promotion of Science (JSPS), grant/award no. JPJSCCA20250004: Warm-period Climate Change Research Center with the International Ocean Drilling School [WarmCCR]
Coverage:
Median Latitude: 43.098419 * Median Longitude: 143.729519 * South-bound Latitude: 43.098055 * West-bound Longitude: 143.727351 * North-bound Latitude: 43.098784 * East-bound Longitude: 143.731687
Date/Time Start: 2015-08-27T00:00:00 * Date/Time End: 2024-08-24T00:00:00
Minimum SECTION, height: 35.4 m * Maximum SECTION, height: 194.3 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Takashima, Reishi | |||
| 2 | Sample code/label | Sample label | Takashima, Reishi | |||
| 3 | SECTION, height | Section | m | Takashima, Reishi | Geocode – Stratigraphic levels are given in meters from the base of the Kawaruppu section, which is defined as 0 m. | |
| 4 | Main Lithology | Main lith | Takashima, Reishi | |||
| 5 | Osmium | Os | pg/g | Ota, Hayu | Negative-thermal ionization mass spectrometer (N-TIMS), Thermo Fisher Scientific, TRITON XT | |
| 6 | Osmium, standard deviation | Os std dev | ± | Ota, Hayu | Negative-thermal ionization mass spectrometer (N-TIMS), Thermo Fisher Scientific, TRITON XT | 1-sigma |
| 7 | Rhenium | Re | pg/g | Ota, Hayu | Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ | |
| 8 | Rhenium, standard deviation | Re std dev | ± | Ota, Hayu | Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP TQ | 1-sigma |
| 9 | Osmium-187/Osmium-188 ratio | 187Os/188Os | Ota, Hayu | Negative-thermal ionization mass spectrometer (N-TIMS), Thermo Fisher Scientific, TRITON XT | ||
| 10 | Osmium-187/Osmium-188 ratio, standard deviation | 187Os/188Os std dev | ± | Ota, Hayu | Negative-thermal ionization mass spectrometer (N-TIMS), Thermo Fisher Scientific, TRITON XT | 1-sigma |
| 11 | Osmium-187/Osmium-188 ratio | 187Os/188Os | Ota, Hayu | Corrected, using the 187Os/188Os ratios for in situ decay of 187Re | Initial | |
| 12 | Osmium-187/Osmium-188 ratio, standard deviation | 187Os/188Os std dev | ± | Ota, Hayu | Corrected, using the 187Os/188Os ratios for in situ decay of 187Re | Initial, 1-sigma |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
244 data points