PANGAEA_989654 Raw noble gas data from RV SONNE cruise SO301 Walter, Maren; Mette, Jonathan; Renzelmann, Henri Raw noble gas data from RV SONNE cruise SO301 2026-01-30 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.989654 Investigator Maren Walter maren.walter@uni-bremen.de Earth Science Event label DATE/TIME Bottle number Device type DEPTH, water Sample mass Helium-4 Helium-3 Neon Helium-3/Helium-4 ratio Neon/Helium ratio δ Helium-3 δ Neon-22 geoscientificInformation CTD/Rosette Helium hydrothermal activity Indian Ocean isotope Kairei field noble gas SO301 SO301_10-1 SO301_15-1 SO301_17-1 SO301_20-1 SO301_2-1 SO301_22-1 SO301_24-1 SO301_28-1 SO301_29-1 SO301_40-1 SO301_41-1 SO301_42-1 SO301_43-1 SO301_5-1 SO301_7-1 SO301_9-1 CTD, Sea-Bird SBE 911plus Ultra high vacuum (UHV) mass spectrometry Sonne_2 2023-11-26 2023-12-31 Complete -25.4633 -25.29485 69.3785 70.0623 19.091 m (DEPTH, water) 3024.81 m (DEPTH, water) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 960 data points text/tab-separated-values Engels, Martin; Barckhausen, Udo; Bartels, Thies; Bauer, Benedikt; Behrens, Thomas; Belleville, Morgane; Dannowski, Anke; Demir, Ümit; Deppe, Joachim; Ebert, Timo; Ehrhardt, Axel; Filbrandt, Christian; Fröhberg, Nico; Gallucci, Luigi; Gomes de Souza, Berenice; Heyde, Ingo; Jegen, Anna; Kuckuck, Jan; Ladage, Stefan; Lücke, Oscar; Lutz, Rüdiger; Mette, Jonathan; Pedre, Ignacio; Raphael Deeban Raj, Shareen; Schauer, Michael; Schnabel, Michael; Schramm, Bettina; Steinborn, Peter; Renzelmann, Henri; Wegener, Gunter (2024): Seismic Imaging at the Central Indian Ridge: Structure and Formation of Oceanic Core Complexes, Cruise No. SO301, November 22, 2023 - January 4, 2024, Port Louis - Port Louis (Mauritius). SONNE-Berichte, Begutachtungspanel Forschungsschiffe, SO301, 127 pp, https://doi.org/10.48433/cr_so301 Sültenfuß, Jürgen; Roether, Wolfgang; Rhein, Monika (2009): The Bremen mass spectrometric facility for the measurement of helium isotopes, neon, and tritium in water. Isotopes in Environmental and Health Studies, 45(2), 83-95, https://doi.org/10.1080/10256010902871929

This dataset contains raw noble gas data from water samples collected during the cruise SO301 at the Rodriguez Tripple Junction, Indian Ocean. Samples were taken either with the CTD rosette water sampling system (CTD) or with a trace-metal-free titanium rosette (TMR) from the Constructor University Bremen. As the TMR has no live data connection to the ship, sample bottles are closed by pre-progamming pressure thresholds. The decision for sampling depths was in general guided by previous CTD casts at the same location. Additional metadata was taken from the corresponding rosette system. The stations were executed in winter 2023/24 to detect possible hydrothermal plumes at the Kairei Vent Site and to assess the dispersal of hydrothermal plumes. From the isotope ratio different water masses can be distinguished. The samples were taken from Niskin bottles into gas tight copper tubes and transported to the Bremen Helium Isotope Laboratory. For the analysis, the samples were extracted with an ultra high vaccum system and transferred into a fully automated mass spectrometric system, which is composed of a two stage cryogenic chamber and a quadrupole and a sector-field mass spectrometer. The system as well as the performance is described in detail in Sültenfuß et al. (2009). The results of double samples taken for control purposes were averaged. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.989654"! ** Nml/kg, mass concentration = normal milliliter per kilogram

http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME http://www.ocean.uni-bremen.de/mitarbeiter/mwalter/index_mw_eng.html https://doi.org/10.1080/10256010902871929 The Bremen mass spectrometric facility for the measurement of helium isotopes, neon, and tritium in water https://doi.org/10.48433/cr_so301 Seismic Imaging at the Central Indian Ridge: Structure and Formation of Oceanic Core Complexes, Cruise No. SO301, November 22, 2023 - January 4, 2024, Port Louis - Port Louis (Mauritius) https://uol.de/icbm/forschungsplattformen-schiffe/sonne Sonne_2 https://www.seabird.com/sbe-911plus-ctd/product?id=60761421595&callback=qs CTD, Sea-Bird SBE 911plus DIF 9.4 2026-01-30 2026-04-29