Opfergelt, Sophie; Gaspard, François; Hirst, Catherine; Monin, Laurence; Juhls, Bennet; Morgenstern, Anne; Overduin, Pier Paul (2024): Silicon isotope composition and Ge/Si ratio of Lena River water from 20.04.2018 (#1) to 28.03.2019 (#77) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967438, In: Juhls, Bennet; Morgenstern, Anne; Chetverova, Antonina; Eulenburg, Antje; Hölemann, Jens A; Povazhnyi, Vasily; Overduin, Pier Paul (2020): Lena River surface water monitoring near the Samoylov Island Research Station [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.913197
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Published: 2024-11-07 • DOI registered: 2024-12-06
Abstract:
We collected water samples from the river surface in the center of the Olenekskaya Channel near Samoylov Island using a pre-rinsed HDPE 1 L bottle. During the open water period (June to October), water was sampled from a small boat, and during ice-covered period (November to May), through a hole drilled through the river ice. Some samples during the river ice break-up (between May and June) as well as some samples during the ice freeze-up in October were taken from the shore due to the inaccessibility of a more centered location on the river channel. Water samples were filtered through a 0.45 μm cellulose acetate filter (which had been rinsed with 20 ml sample water) for Ge concentration and Si isotope composition measurements. The Ge concentration was determined by ICP-mass spectrometry (ICP-MS, ICAPQ Thermo Fisher Scientific, Earth & Life Institute, UCLouvain, Belgium). The detection limit for Ge is 0.04 nM and the analytical precision of the measurement is ± 8% for Ge concentrations < 0.013 nM and ± 4% for Ge concentrations > 0.013 nM. The germanium to silicon ratio was calculated using the silicon concentration available form Juhls et al 2020 (https://doi.org/10.1594/PANGAEA.913197). The standard deviation (SD) on Ge/Si ratio determination is 10%. The silicon isotope composition (δ30Si) was analyzed by MC-ICP-MS (Neptune Plus™ High Resolution Multicollector ICP-MS, Thermo Fisher Scientific, Earth & Life Institute, UCLouvain, Belgium) in wet plasma mode after Si separation using a two-stages column chemistry procedure using an anion exchange resin (Biorad AG MP-1) followed by a cation exchange resin (Biorad AG50W-X12). The instrumental mass bias was corrected using the standard-sample bracketing technique and an external Mg doping. The δ30Si compositions are expressed in relative deviations of 30Si/28Si ratio from the NBS-28 reference standard using the δ-notation (‰) as follows: δ30Si = [(30Si/28Si)sample/(30Si/28Si)NBS-28 -1] × 1000. Each single δ-value represents one sample run and two bracketing standards. The δ30Si values are reported as the mean of isotopic analyses from multiple analytical sessions at least in duplicate (± SD).
Coverage:
Latitude: 72.367977 * Longitude: 126.459550
Date/Time Start: 2018-04-20T21:00:00 * Date/Time End: 2019-03-28T17:00:00
Minimum DEPTH, water: 0.2 m * Maximum DEPTH, water: 0.2 m
Event(s):
Olenekskaya_Ch * Latitude: 72.367977 * Longitude: 126.459550 * Method/Device: Sampling river (RIVER)
RU-Land_2018_Lena_Olenekskaya * Latitude: 72.367977 * Longitude: 126.459550 * Date/Time Start: 2018-04-05T00:00:00 * Date/Time End: 2018-09-15T00:00:00 * Campaign: RU-Land_2018_Lena (Lena 2018) * Basis: AWI Arctic Land Expedition * Method/Device: Sampling river (RIVER)
RU-Land_2019_Lena_Olenekskaya * Latitude: 72.367977 * Longitude: 126.459550 * Date/Time Start: 2019-03-24T00:00:00 * Date/Time End: 2019-09-17T00:00:00 * Campaign: RU-Land_2019_Lena (Lena 2019) * Basis: AWI Arctic Land Expedition * Method/Device: Sampling river (RIVER)
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Identification | ID | Juhls, Bennet | |||
2 | DATE/TIME | Date/Time | Juhls, Bennet | Geocode | ||
3 | DEPTH, water | Depth water | m | Juhls, Bennet | Geocode | |
4 | Comment | Comment | Juhls, Bennet | |||
5 | Germanium | Ge | nmol/l | Opfergelt, Sophie | Mass spectrometer (ICP-QMS), Thermo Scientific, iCap Q | |
6 | Germanium/Silicon ratio | Ge/Si | µmol/mol | Opfergelt, Sophie | ||
7 | Germanium/Silicon ratio, standard deviation | Ge/Si std dev | ± | Opfergelt, Sophie | ||
8 | δ30Si | δ30Si | ‰ NBS | Opfergelt, Sophie | Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Neptune Plus | |
9 | δ30Si, standard deviation | δ30Si std dev | ± | Opfergelt, Sophie | Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Neptune Plus |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
468 data points