{"type": "FeatureCollection", "features": [{"id": "10.1016/j.chemgeo.2016.11.020", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:45Z", "type": "Journal Article", "created": "2016-11-17", "title": "The gallium isotopic composition of the bulk silicate Earth", "description": "AbstractWe report a new method for precise analysis of gallium (Ga) isotopic composition in geological samples. The purification of Ga is achieved by a three-step ion exchange chromatography to remove matrix and interfering elements. The 71Ga/69Ga ratios are analyzed by multi-collector inductively-coupled-plasma mass-spectrometer (MC-ICP-MS). The external reproducibility of the measurements (0.05\u2030, 2 s.d.) was assessed by replicate analyses of the USGS BCR-2 and BHVO-2 standards. This newly developed technique was then used to investigate the extent of Ga isotopic fractionation during igneous processes by analyzing well-characterized samples from the Kilauea Iki lava lake, USA. These samples were formed in a closed system and have MgO contents ranging from 26.9 to 2.4wt.%. We found that igneous processes do not fractionate Ga isotopes within the analytical uncertainty and that the Ga isotopic composition of mafic-ultramafic lavas can be used to estimate the composition of their mantle source. Twelve ocean island basalts, two mid-ocean-ridge basalts, one continental flood basalt and one komatiite have homogeneous and nearly identical Ga isotopic compositions within analytical uncertainties averaging 0.00\u00b10.06\u2030 (2s.d.). This value represents the best estimate for the Ga isotopic composition of the bulk silicate Earth", "keywords": ["Bulk Silicate Earth", "Komatiite", "Gallium", "Geology", "MORB", "01 natural sciences", "[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "Geochemistry and Petrology", "13. Climate action", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "14. Life underwater", "OIB", "MC-ICP-MS", "Basalt", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.chemgeo.2016.11.020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Chemical%20Geology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.chemgeo.2016.11.020", "name": "item", "description": "10.1016/j.chemgeo.2016.11.020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.chemgeo.2016.11.020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-01-01T00:00:00Z"}}, {"id": "10.1016/j.chemgeo.2017.03.013", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:45Z", "type": "Journal Article", "created": "2017-03-20", "title": "Tin stable isotope analysis of geological materials by double-spike MC-ICPMS", "description": "Abstract Tin is a volatile as well as chalcophile and siderophile element, and this geochemical behaviour gives rise to a broad range of potential applications for Sn as a stable isotope tracer in geological processes. We present the first high-precision method to analyse the stable isotopic composition of Sn in geological materials using ion-exchange chromatography and double-spike multi-collector inductively-coupled-plasma mass-spectrometry (MC-ICPMS). We apply these methods to analyse the Sn stable isotopic composition of four geological reference materials, including a number of replicate digestions of BHVO-2 and BCR-2 to assess the reproducibility of the technique. Tin was purified prior to analysis using TRU resin to remove matrix and interfering elements. Isotopic ratios were measured using a Thermo-Fischer Neptune Plus MC-ICPMS combined with a 117Sn\u2013122Sn double-spike to correct for any mass dependent fractionation resulting from instrumental mass bias or incomplete yields from chemical purification. Results are expressed in delta notation as \u03b4 122/118Sn, representing the per mil (\u2030) difference in the 122/118Sn ratio of the sample relative to our in-house standard Sn_IPGP. Based on replicate analyses of the USGS reference materials BHVO-2 and BCR-2, we estimate the external reproducibility to be ca. \u00b1 0.065\u2030 (2 sd) on the \u03b4 122/118Sn ratio, or ca. \u00b1 0.016\u2030 per amu. Analyses of these plus two additional USGS reference materials, AGV-2 and GSP-2, show a large range (>0.2\u2030 on \u03b4 122/118Sn) of Sn stable isotopic compositions that are correlated with igneous differentiation indicators (e.g. SiO2 content), indicating that Sn isotopes are fractionated during igneous processes. These results indicate significant potential for Sn stable isotopes as a tracer of magmatic differentiation and the redox state of the mantle. In addition, Sn stable isotopes may prove useful in tracing diverse geological processes such as volatilisation/condensation and metal\u2013silicate/metal\u2013sulphide differentiation.", "keywords": ["Geochemistry and Petrology", "13. Climate action", "Geology", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.chemgeo.2017.03.013"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Chemical%20Geology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.chemgeo.2017.03.013", "name": "item", "description": "10.1016/j.chemgeo.2017.03.013", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.chemgeo.2017.03.013"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-05-01T00:00:00Z"}}, {"id": "10.1016/j.gca.2021.06.037", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:14Z", "type": "Journal Article", "created": "2021-07-06", "title": "The influence of soil chemistry on branched tetraether lipids in mid- and high latitude soils: Implications for brGDGT- based paleothermometry", "description": "Open AccessGeochimica et Cosmochimica Acta, 310", "keywords": ["Biomarker lipid proxy development", "0301 basic medicine", "0303 health sciences", "Branched GDGT; Biomarker lipid proxy development", "Branched GDGT", "branched GDGT", "Plan_S-Compliant_NO", "15. Life on land", "03 medical and health sciences", "Geochemistry and Petrology", "13. Climate action", "international", "SDG 2 - Zero Hunger", "Biology"]}, "links": [{"href": "https://doi.org/10.1016/j.gca.2021.06.037"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geochimica%20et%20Cosmochimica%20Acta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.gca.2021.06.037", "name": "item", "description": "10.1016/j.gca.2021.06.037", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.gca.2021.06.037"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-10-01T00:00:00Z"}}, {"id": "10.1016/j.gca.2016.03.006", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:13Z", "type": "Journal Article", "created": "2016-03-11", "title": "Cosmogenic effects on Cu isotopes in IVB iron meteorites", "description": "We measured Cu isotope compositions of 12 out of the 14 known IVB iron meteorites. Our results show that IVB iron meteorites display a very large range of \u03b465Cu values (\u22125.84\u2030\u00a0<\u00a0\u03b465Cu\u00a0<\u00a0\u22120.24\u2030; defined as per mil deviation of the 65Cu/63Cu ratio from the NIST-976 standard). These Cu isotopic data display clear correlations with W, Pt, and Os isotope ratios, which are very sensitive to secondary neutron capture due to galactic cosmic ray (GCR) irradiation. This demonstrates that \u03b465Cu in IVB irons is majorly modified by neutron capture by the reaction 62Ni(n,\u03b3)63Ni followed by beta decay to 63Cu. Using correlations with Pt and Os neutron dosimeters, we calculated a pre-exposure \u03b465Cu of \u22120.3\u00a0\u00b1\u00a00.8\u2030 (95% conf.) of IVB irons that agrees well with the Cu isotopic compositions of other iron meteorite groups and falls within the range of chondrites. This shows that the volatile depletion of the IVB parent body is not due to evaporation that should have enriched IVB irons in the heavy Cu isotopes.", "keywords": ["HF-W CHRONOMETRY", "COPPER", "01 natural sciences", "PROTRACTED CORE FORMATION", "COOLING RATES", "CHONDRITES", "[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "Geochemistry and Petrology", "13. Climate action", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "RAY-PRODUCED NUCLIDES", "PARENT BODIES", "NEUTRON-CAPTURE", "HETEROGENEITY", "RAPID ACCRETION", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.gca.2016.03.006"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geochimica%20et%20Cosmochimica%20Acta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.gca.2016.03.006", "name": "item", "description": "10.1016/j.gca.2016.03.006", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.gca.2016.03.006"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-06-01T00:00:00Z"}}, {"id": "10.1029/2018JE005899", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:17:26Z", "type": "Journal Article", "created": "2020-03-09", "title": "Initiation and Flow Conditions of Contemporary Flows in Martian Gullies", "description": "

&lt;p&gt;Understanding the initial and flow conditions of contemporary flows in Martian gullies, generally believed to be triggered and fluidized by CO&lt;sub&gt;2&lt;/sub&gt; sublimation, is crucial for deciphering climate conditions needed to trigger and sustain them. We employ the RAMMS (RApid Mass Movement Simulation) debris flow and avalanche model to back-calculate initial and flow conditions of recent flows in three gullies in Hale crater. We infer minimum release depths of 1.0&amp;#8211;1.5 m and initial release volumes of 100&amp;#8211;200 m&lt;sup&gt;3&lt;/sup&gt;. Entrainment leads to final flow volumes that are 2.5&amp;#8211;5.5 times larger than initially released, and entrainment is found necessary to match the observed flow deposits. Simulated mean cross-channel flow velocities decrease from 3&amp;#8211;4 m s&lt;sup&gt;-1&lt;/sup&gt; to ~1 m s&lt;sup&gt;-1&lt;/sup&gt; from release area to flow terminus, while flow depths generally decrease from 0.5&amp;#8211;1 m to 0.1&amp;#8211;0.2 m. The mean cross-channel erosion depth and deposition thicknesses are _0.1&amp;#8211;0.3 m. Back-calculated dry-Coulomb friction ranges from 0.1 to 0.25 and viscous turbulent friction between 100&amp;#8211;200 m s&lt;sup&gt;-2&lt;/sup&gt;, which are values similar to those of granular debris flows on Earth. These results suggest that recent flows in gullies are fluidized to a similar degree as are granular debris flows on Earth. Using a novel model for mass-flow fluidization by CO&lt;sub&gt;2&lt;/sub&gt; sublimation we are able to show that under Martian atmospheric conditions very small volumetric fractions of CO&lt;sub&gt;2&lt;/sub&gt; of ~1% within mass flows may indeed yield sufficiently large gas fluxes to cause fluidization and enhance flow mobility.&lt;/p&gt;

", "keywords": ["Atmospheric Science", "550", "[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology", "0211 other engineering and technologies", "Soil Science", "Mars", "Hale crater", "02 engineering and technology", "Aquatic Science", "carbon dioxide; gullies; Hale crater; Mars; modeling; RAMMS", "551", "Oceanography", "01 natural sciences", "[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology", "Geochemistry and Petrology", "Earth and Planetary Sciences (miscellaneous)", "SDG 13 - Climate Action", "Research Articles", "Water Science and Technology", "Earth-Surface Processes", "0105 earth and related environmental sciences", "Ecology", "Palaeontology", "carbon dioxide", "Forestry", "modeling", "RAMMS", "Geophysics", "Space and Planetary Science", "13. Climate action", "[SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology", "gullies"]}, "links": [{"href": "http://dro.dur.ac.uk/28802/1/28802.pdf"}, {"href": "http://dro.dur.ac.uk/28802/2/28802.pdf"}, {"href": "https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018JE005899"}, {"href": "https://doi.org/10.1029/2018JE005899"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Geophysical%20Research%3A%20Planets", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/2018JE005899", "name": "item", "description": "10.1029/2018JE005899", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/2018JE005899"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-08-01T00:00:00Z"}}, {"id": "10.1038/srep08280", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:17:39Z", "type": "Journal Article", "created": "2015-02-06", "title": "Convergence Of Soil Nitrogen Isotopes Across Global Climate Gradients", "description": "Abstract

Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the 15N:14N ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of N cycling. In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual temperature (MAT), mean annual precipitation (MAP) and the concentrations of organic carbon and clay in soil. In both hot ecosystems and dry ecosystems, soil organic matter was more enriched in 15N than in corresponding cold ecosystems or wet ecosystems. Below a MAT of 9.8\uffc2\uffb0C, soil \uffce\uffb415N was invariant with MAT. At the global scale, soil organic C concentrations also declined with increasing MAT and decreasing MAP. After standardizing for variation among mineral soils in soil C and clay concentrations, soil \uffce\uffb415N showed no consistent trends across global climate and latitudinal gradients. Our analyses could place new constraints on interpretations of patterns of ecosystem N cycling and global budgets of gaseous N loss.

", "keywords": ["N-15 Natural-Abundance", "550", "Ecosystem ecology", "TROPICAL FORESTS", "Organic chemistry", "Suelo", "Nitrogen cycle", "01 natural sciences", "Nutrient cycle", "cycle de l'azote", "CARBON", "Agricultural and Biological Sciences", "Soil", "Terrestrial ecosystem", "Isotopes", "https://purl.org/becyt/ford/1.6", "Soil water", "SDG 13 - Climate Action", "N-15 NATURAL-ABUNDANCE", "Climate change", "croisement de donn\u00e9es", "Milieux et Changements globaux", "SDG 15 \u2013 Leben an Land", "Global change", "SDG 15 - Life on Land", "2. Zero hunger", "106022 Mikrobiologie", "Climatic Factors", "Tropical Forests", "Ecology", "Geography", "Nitr\u00f3geno", "Nutrient Cycling", "FRACTIONATION", "Litter Decomposition", "ECOSYSTEM ECOLOGY", "Life Sciences", "ecosystem ecology", "Cycling", "Forestry", "Is\u00f3topos", "Carbon cycle", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "Soil carbon", "6. Clean water", "Organic-Matter", "Earth and Planetary Sciences", "ORGANIC-MATTER", "Chemistry", "PRECIPITATION", "SDG 13 \u2013 Ma\u00dfnahmen zum Klimaschutz", "Physical Sciences", "106022 Microbiology", "carbone du sol", "Stable Isotope Analysis of Groundwater and Precipitation", "Ecosystem Functioning", "570", "STABLE ISOTOPE", "Biogeochemical Cycling of Nutrients in Aquatic Ecosystems", "Stable isotope analysis", "Nitrogen", "[SDE.MCG]Environmental Sciences/Global Changes", "Soil Science", "stable isotope analysis;ecosystem ecology", "Article", "Environmental science", "LITTER DECOMPOSITION", "sol min\u00e9ral", "INORGANIC NITROGEN", "Geochemistry and Petrology", "stable isotope analysis", "Carbono", "Environmental Chemistry", "Factores Clim\u00e1ticos", "https://purl.org/becyt/ford/1", "Biology", "Ecosystem", "0105 earth and related environmental sciences", "Soil science", "Soil organic matter", "Soil Fertility", "climat", "AVAILABILITY", "Nitrogen Dynamics", "15. Life on land", "Carbon", "Inorganic", "NITROGEN", "MODEL", "[SDE.MCG] Environmental Sciences/Global Changes", "13. Climate action", "FOS: Biological sciences", "Environmental Science", "PATTERNS", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems"]}, "links": [{"href": "https://scholars.unh.edu/context/faculty_pubs/article/1042/viewcontent/srep08280.pdf"}, {"href": "https://edoc.unibas.ch/37215/1/srep08280.pdf"}, {"href": "https://doi.org/10.1038/srep08280"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep08280", "name": "item", "description": "10.1038/srep08280", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep08280"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-02-06T00:00:00Z"}}, {"id": "10.1371/journal.pone.0102062", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:19:19Z", "type": "Journal Article", "created": "2014-07-15", "title": "Effects Of Biochar On Soil Microbial Biomass After Four Years Of Consecutive Application In The North China Plain", "description": "Open AccessL'effet \u00e0 long terme de l'application de biochar sur la biomasse microbienne du sol n'est pas bien compris. Nous avons mesur\u00e9 le carbone (MBC) et l'azote (MBN) de la biomasse microbienne du sol dans une exp\u00e9rience sur le terrain au cours d'une saison de croissance du bl\u00e9 d'hiver apr\u00e8s quatre ann\u00e9es cons\u00e9cutives sans (CK), 4,5 (B4,5) et 9,0 t de biochar ha\u22121 an\u22121 (B9,0) appliqu\u00e9. \u00c0 titre de comparaison, un traitement avec incorporation de r\u00e9sidus de paille de bl\u00e9 (SR) a \u00e9galement \u00e9t\u00e9 inclus. Les r\u00e9sultats ont montr\u00e9 que l'application de biochar augmentait significativement le MBC du sol par rapport au traitement CK, et que la taille de l'effet augmentait avec le taux d'application de biochar. Le traitement B9.0 a montr\u00e9 le m\u00eame effet sur le CSM que le traitement SR. Les effets des traitements sur la MBN du sol \u00e9taient moins forts que pour le MBC. Le ratio de biomasse microbienne C N a \u00e9t\u00e9 significativement augment\u00e9 par le biochar. Le biochar pourrait diminuer la fraction de la biomasse N min\u00e9ralis\u00e9e (KN), ce qui sous-estimerait le MBN du sol pour les traitements au biochar, et surestimerait les rapports C/N de la biomasse microbienne. La fluctuation saisonni\u00e8re dans le CSM \u00e9tait moins importante pour les sols modifi\u00e9s par le biochar que pour les traitements CK et SR, ce qui sugg\u00e8re que le biochar a induit un environnement moins extr\u00eame pour les micro-organismes tout au long de la saison. Il y avait une corr\u00e9lation positive significative entre le CSM et la teneur en eau du sol (CFS), mais il n'y avait pas de corr\u00e9lation significative entre le CSM et la temp\u00e9rature du sol. Les modifications du biochar peuvent donc r\u00e9duire la variabilit\u00e9 temporelle des conditions environnementales pour la croissance microbienne dans ce syst\u00e8me, r\u00e9duisant ainsi les fluctuations temporelles de la dynamique du C et de l'N.", "keywords": ["Biomass (ecology)", "Carbon sequestration", "China", "Nitrogen", "Science", "Geochemistry and Utilization of Coal and Coal Byproducts", "Soil Science", "Organic chemistry", "Environmental science", "Agricultural and Biological Sciences", "Geochemistry and Petrology", "Soil water", "Development and Impacts of Bioenergy Crops", "Biomass", "Biology", "Ecosystem", "Soil Microbiology", "Biochar Application", "Soil science", "2. Zero hunger", "Analysis of Variance", "Q", "R", "Life Sciences", "Straw", "04 agricultural and veterinary sciences", "15. Life on land", "Soil carbon", "Carbon", "Agronomy", "6. Clean water", "Earth and Planetary Sciences", "Biochar", "Chemistry", "13. Climate action", "Charcoal", "Physical Sciences", "Environmental chemistry", "Medicine", "Growing season", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems", "Agronomy and Crop Science", "Animal science", "Pyrolysis", "Research Article"]}, "links": [{"href": "https://doi.org/10.1371/journal.pone.0102062"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/PLoS%20ONE", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1371/journal.pone.0102062", "name": "item", "description": "10.1371/journal.pone.0102062", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1371/journal.pone.0102062"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-07-15T00:00:00Z"}}, {"id": "20.500.11850/500026", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:24:29Z", "type": "Journal Article", "created": "2021-07-05", "title": "The influence of soil chemistry on branched tetraether lipids in mid- and high latitude soils: Implications for brGDGT- based paleothermometry", "description": "Open AccessGeochimica et Cosmochimica Acta, 310", "keywords": ["Biomarker lipid proxy development", "0301 basic medicine", "0303 health sciences", "Branched GDGT; Biomarker lipid proxy development", "Branched GDGT", "branched GDGT", "Plan_S-Compliant_NO", "15. Life on land", "03 medical and health sciences", "Geochemistry and Petrology", "13. Climate action", "international", "SDG 2 - Zero Hunger", "Biology"]}, "links": [{"href": "https://doi.org/20.500.11850/500026"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geochimica%20et%20Cosmochimica%20Acta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "20.500.11850/500026", "name": "item", "description": "20.500.11850/500026", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/20.500.11850/500026"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-10-01T00:00:00Z"}}, {"id": "2078.1/252765", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:25:08Z", "type": "Journal Article", "created": "2021-10-26", "title": "Quantifying Non\u2010Thermal Silicate Weathering Using Ge/Si and Si Isotopes in Rivers Draining the Yellowstone Plateau Volcanic Field, USA", "description": "Abstract

In active volcanic regions, high\uffe2\uff80\uff90temperature chemical reactions in the hydrothermal system consume CO2 sourced from magma or from the deep crust, whereas reactions with silicates at shallow depths mainly consume atmospheric CO2. Numerous studies have quantified the load of dissolved solids in rivers that drain volcanic regions to determine chemical weathering rates and atmospheric CO2 consumption rates. However, the balance between thermal and non\uffe2\uff80\uff90thermal components to riverine fluxes in these areas remains poorly constrained, hindering accurate estimates of atmospheric CO2 consumption rates. Here we use the Ge/Si ratio and the stable silicon isotopes (\uffce\uffb430Si) as tracers for quantifying non\uffe2\uff80\uff90thermal silicon contributions in rivers draining the Yellowstone Plateau Volcanic Field, USA. The Ge/Si ratio (\uffc2\uffb5mol.mol\uffe2\uff88\uff921) was determined for seven thermal water samples (183\uffc2\uffa0\uffc2\uffb1\uffc2\uffa022), eight rivers (35\uffc2\uffa0\uffc2\uffb1\uffc2\uffa023) and six creeks flowing into Yellowstone Lake (5\uffc2\uffa0\uffc2\uffb1\uffc2\uffa03) during base flow and during peak water discharge following snowmelt. The \uffce\uffb430Si value (\uffe2\uff80\uffb0) was determined for thermal waters (\uffe2\uff88\uff920.09\uffc2\uffa0\uffc2\uffb1\uffc2\uffa00.04), Yellowstone River at Yellowstone Lake outlet (1.91\uffc2\uffa0\uffc2\uffb1\uffc2\uffa00.23) and creek samples (0.82\uffc2\uffa0\uffc2\uffb1\uffc2\uffa00.29). The calculated atmospheric CO2 consumption associated with non\uffe2\uff80\uff90thermal waters flowing through Yellowstone's rivers during peak discharge is \uffe2\uff88\uffbc3.03 ton.km\uffe2\uff88\uff922.yr\uffe2\uff88\uff921, which is \uffe2\uff88\uffbc2% of the annual mean atmospheric CO2 consumption in other volcanic regions. This study highlights the significance of quantifying seasonal variations in chemical weathering rates for improving estimates of atmospheric CO2 consumption rates in active volcanic regions.