@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix gsp: . @prefix locn: . @prefix owl: . @prefix rdfs: . @prefix schema: . @prefix xsd: . a schema:Dataset, dcat:Dataset, foaf:Document ; dct:bibliographicCitation "https://doi.org/10.1594/PANGAEA.967438" ; dct:contributor "pangaea" ; dct:description "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)." ; dct:identifier "https://doi.pangaea.de/10.1594/PANGAEA.967438" ; dct:issued "2026-05-20T14:18:53.740576"^^xsd:dateTime ; dct:modified "2026-05-22T21:37:13.160683"^^xsd:dateTime ; dct:publisher [ a foaf:Agent ; foaf:homepage ; foaf:name "PANGAEA" ], [ a foaf:Agent ; foaf:homepage ; foaf:name "PANGAEA" ] ; dct:spatial [ a dct:Location ; locn:geometry "POINT (126.4595 72.3680)"^^gsp:wktLiteral ] ; dct:temporal [ a dct:PeriodOfTime ; dcat:endDate "2019-03-28"^^xsd:date ; dcat:startDate "2018-04-20"^^xsd:date ], [ a dct:PeriodOfTime ; dcat:endDate "2019-03-28"^^xsd:date ; dcat:startDate "2018-04-20"^^xsd:date ] ; dct:title "Silicon isotope composition and Ge/Si ratio of Lena River water from 20.04.2018 (#1) to 28.03.2019 (#77)" ; schema:about [ a schema:Thing ; schema:name "sun-earth-interactions" ; schema:url "https://dataportal.dev.inkode.org/group/d442910f-0139-4e53-9505-29017a7c4ecb" ] ; schema:citation "https://doi.org/10.1594/PANGAEA.967438" ; schema:contributor "pangaea" ; schema:creator [ a schema:Organization ; schema:contactPoint [ a schema:ContactPoint ; schema:contactType "customer service" ; schema:name "Alfred Wegener Institute for Polar and Marine Research (AWI - Partner 7)" ; schema:url "https://doi.pangaea.de/10.1594/PANGAEA.967438" ] ; schema:name "Alfred Wegener Institute for Polar and Marine Research (AWI - Partner 7)" ] ; schema:dateModified "2026-05-22T21:37:13.160683" ; schema:datePublished "2024-11-07", "2024-11-07T00:00:00" ; schema:description "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. 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