Geochimica et Cosmochimica Acta最新文献

{"title":"Mg, Zn and Fe isotope evidence for derivation of K-rich basalts from the mantle hybridized by recycled carbonate-bearing silicate sediments","authors":"Zhao-Xue Wang ,&nbsp;Sheng-Ao Liu ,&nbsp;Dejan Prelević ,&nbsp;Shuguang Li ,&nbsp;Ze-Zhou Wang ,&nbsp;Tianhao Wu ,&nbsp;Jingao Liu","doi":"10.1016/j.gca.2025.02.016","DOIUrl":"10.1016/j.gca.2025.02.016","url":null,"abstract":"<div><div>Potassium-rich basalts provide valuable information about mantle heterogeneity and crust-mantle interaction because of their distinctive geochemical features. One of the long-standing issues regarding the origin of K-rich basalts is the nature of the K-rich mantle component required to generate such lavas. To provide further constraints on this issue, we present combined analyses of Mg, Zn and Fe isotopic compositions in the Cenozoic intraplate K-rich basalts from northeast China. The samples include both potassic and ultrapotassic basalts with K₂O/Na₂O ratios up to 3.42 and have typical Enriched Mantle-I Sr-Nd isotopic signatures. The ultrapotassic basalts have lighter Mg isotopic compositions than those of mid-ocean ridge basalts (MORB), but their Zn isotopic compositions are similar to or slightly higher than those of MORB, defining a strong Mg-Zn isotopic decoupling that suggests a dominant role of recycled carbonate-poor siliciclastic sediments in their sources. These rocks have Fe isotopic compositions (δ⁵⁶Fe) identical with those of MORB, indicating a peridotite-dominant source that has not been oxidized by the recycled sediments. Along with the high Fo (molar Mg²⁺/(Mg²⁺+Fe²⁺) × 100) of olivine phenocrysts, we suggest that the ultrapotassic basalts originated from the metasomatized (K-rich) sub-continental lithospheric mantle. Compared with ultrapotassic basalts, the potassic basalts have heavier Zn isotopic compositions at similar δ²⁶Mg, defining a weaker Mg-Zn isotopic decoupling that suggests a large proportion of carbonates in the recycled siliciclastic sediments (i.e., carbonate-rich sediments). In addition, the potassic basalts have higher δ⁵⁶Fe and lower Fo of olivine phenocrysts, pointing to a deeper, fertile mantle source that may have been oxidized by recycled carbonates, most likely at the mantle transition zone (MTZ). These results collectively suggest that both the potassic and ultrapotassic lavas in northeast China were formed via partial melting of the mantle hybridized by recycled siliciclastic sediments containing different proportions of carbonates. Therefore, the K-rich mantle component required for generating the extreme K enrichment in some intraplate lavas was primarily produced by recycled carbonate-bearing siliciclastic sediments in different mantle domains.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"394 ","pages":"Pages 244-257"},"PeriodicalIF":4.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Algal lipid distributions and hydrogen isotope ratios reflect phytoplankton community dynamics","authors":"Antonia Klatt ,&nbsp;Cindy De Jonge ,&nbsp;Daniel B. Nelson ,&nbsp;Marta Reyes ,&nbsp;Carsten J. Schubert ,&nbsp;Nathalie Dubois ,&nbsp;S. Nemiah Ladd","doi":"10.1016/j.gca.2025.02.013","DOIUrl":"10.1016/j.gca.2025.02.013","url":null,"abstract":"<div><div>Reconstructions of past changes in algal community composition provide important context for future alterations in biogeochemical cycling. However, many existing phytoplankton proxies are indicative of individual algal groups and are not fully representative of the whole community. Here, we evaluated hydrogen isotope ratios of algal lipids (δ²H_Lipid) as a potential proxy for phytoplankton community composition. We sampled the water column of Rotsee, a small eutrophic lake in Switzerland, every second week from January 2019 to February 2020 and analyzed distributions and the relative offsets between δ²H_Lipid values (δ²H_{Lipid1/Lipid2}) from short-chain fatty acids, phytosterols and phytol. Comparing these data with phytoplankton cell counts, we found that δ²H_{C16:0 Acid/Sterol} and δ²H_{Sterol/Phytol} values reflect shifts within the eukaryotic algal community. To assess whether the selected phytoplankton groups were the main sources of the selected lipids, we further modeled algal δ²H_{Lipid1/Lipid2} values based on δ²H_{C16:0 Acid}, δ²H_Sterol and δ²H_Phytol values from batch cultures of individual algal groups and their biovolume in Rotsee and evaluated the role of heterotrophy on δ²H_{Lipid1/Lipid2} values using a model incorporating δ²H_{C16:0 Acid} and δ²H_Sterol values from microzooplankton. Annually-integrated and amount-weighted δ²H_{Lipid1/Lipid2} values measured in Rotsee were within 2 to 20 ‰ of the mean of modeled algal δ²H_{Lipid1/Lipid2} values, demonstrating a strong link with the phytoplankton community composition, while δ²H_{Lipid1/Lipid2} values including microzooplankton lipids had a larger offset. Additionally, cyanobacterial biovolume was positively correlated with the ratio of phytol and phytosterols (phytol:sterol ratio) as well as the ratio of unsaturated C18 and C16:0 fatty acids (C18:C16 ratio). Our results support the application of sedimentary δ²H_{Lipid1/Lipid2} values in eutrophic lakes as a proxy for past phytoplankton community assemblages. Moreover, the calculation of sedimentary phytol:sterol and C18:C16 ratios provides an additional proxy for reconstructing cyanobacterial blooms.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"394 ","pages":"Pages 205-219"},"PeriodicalIF":4.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drivers of inorganic and organic carbon removal in aged oceanic crust","authors":"Sunita R. Shah Walter ,&nbsp;Leland J. Wood ,&nbsp;Kristin M. Yoshimura ,&nbsp;S.Fisher Gonski ,&nbsp;Wei-Jun Cai ,&nbsp;Julie A. Huber ,&nbsp;Elizabeth Trembath-Reichert ,&nbsp;Peter R. Girguis","doi":"10.1016/j.gca.2025.02.012","DOIUrl":"10.1016/j.gca.2025.02.012","url":null,"abstract":"<div><div>Large volumes of fluid flow through aged oceanic crust. Given the scale of this water flux, the exchange of organic and inorganic carbon that it mediates between the crust and deep ocean can be significant. However, off-axis carbon fluxes in older oceanic crust are still poorly constrained because access to low-temperature fluids from this environment is limited. At North Pond, a sedimented depression located on 8-million-year-old crust on the flank of the Mid-Atlantic Ridge, circulating crustal fluids are accessible through drilled borehole observatories. Here, fluids are cool (≤ 20 °C), oxygenated and bear strong geochemical similarities to bottom seawater. In this study, we report the concentrations and isotopic composition of dissolved organic and inorganic carbon from crustal fluids that were sampled six years after the installation of borehole observatories. These which better represent the fluid geochemistry prior to drilling and perturbation than earlier studies. Radiocarbon-based signatures within carbon reservoirs support divergent shallow and deep fluid pathways within the crust. We also report a net loss of both dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) from the fluid during isolation in the crust. The removal of DOC is isotopically selective and consistent with microbe-mediated DOC oxidation. The loss of DIC is consistent with carbonate precipitation, although geochemical signatures of DIC addition to the fluids from DOC oxidation and basalt weathering are also evident. Extrapolated to global fluxes, systems like North Pond could be responsible for a net loss of ∼ 10¹¹ mol C yr⁻¹ of DIC and ∼ 10¹¹ mol C yr⁻¹ of DOC during the circulation of fluids through oceanic crust at low temperatures.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"394 ","pages":"Pages 1-14"},"PeriodicalIF":4.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Fire distinguishers: Refined interpretations of polycyclic aromatic hydrocarbons for paleo-applications” [Geochimica et Cosmochimica Acta 289 (2020) 93–113]","authors":"A. Tyler Karp ,&nbsp;Alex I. Holman ,&nbsp;Peter Hopper ,&nbsp;Kliti Grice ,&nbsp;Katherine H. Freeman","doi":"10.1016/j.gca.2025.01.030","DOIUrl":"10.1016/j.gca.2025.01.030","url":null,"abstract":"","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"395 ","pages":"Pages 277-278"},"PeriodicalIF":4.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Growth kinetics of siderite at 298.15 K and 1 bar” [Geochimica et Cosmochimica Acta. 274 (2020) 97−117]","authors":"Clancy Zhijian Jiang,&nbsp;Nicholas J. Tosca","doi":"10.1016/j.gca.2025.02.008","DOIUrl":"10.1016/j.gca.2025.02.008","url":null,"abstract":"","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"396 ","pages":"Page 195"},"PeriodicalIF":4.5,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomarker 14C evidence for sources and recycling of pre-aged organic carbon in Arctic permafrost regions","authors":"Julie Lattaud ,&nbsp;Timothy I. Eglinton ,&nbsp;Negar Haghipour ,&nbsp;Marcus Schiedung ,&nbsp;Lisa Bröder","doi":"10.1016/j.gca.2025.02.010","DOIUrl":"10.1016/j.gca.2025.02.010","url":null,"abstract":"<div><div>Permafrost thaw has the potential to release ancient particulate and dissolved organic matter that had been stored for thousands of years. Previous studies have shown that dissolved organic matter from permafrost is very labile and can be used by heterotrophic microbes close to the thaw area. However, it is unknown if ancient particulate organic matter can also be utilized. This study aims to investigate whether arctic microbial communities (bacteria and Archaea) incorporate ancient organic matter potentially released from thawing permafrost into their biomass. We compare and contrast the radiocarbon signatures of microbial lipids and higher plant biomarkers (representing terrestrial organic matter) from five soil profiles and seven deltaic lake sediment cores from the Mackenzie River drainage basin, Arctic Canada. In the surface soils, modern to post-modern short-chain fatty acids (SCFA) ages indicate <em>in situ</em> microbial production, with differential rates of organic carbon (OC) cycling depending on soil moisture. In contrast, SCFA in deeper soils display millennial ages, which likely represent the microbial necromass preserved through mineral association. In deltaic lakes that are disconnected from the river, generally old SCFA suggests the uptake of pre-aged OC by bacteria. In perennially connected lakes, pre-aged SCFA could originate from <em>in situ</em> microbial uptake of old OC or from the Mackenzie River. Higher plant-derived long-chain fatty acids (LCFA) present older radiocarbon ages, reflecting mineral stabilization during either pre-aging in soils (for high closure lakes) or riverine transport (for no and low closure lakes). Archaeal lipids are younger than SCFA and LCFA in high closure lakes, and older in low and no closure lakes, mirroring bulk radiocarbon signatures due to their heterotrophic production. These radiocarbon signatures of bacterial biomarker lipids may therefore reflect microbial incorporation of ancient OC (e.g., derived from permafrost thaw) or exceptional preservation (e.g., through mineral stabilization). Hence, even in relatively high OC environments such as arctic aquatic ecosystems, microbes can rely on ancient OC for their growth.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"393 ","pages":"Pages 75-85"},"PeriodicalIF":4.5,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A predictive model for divalent element partitioning between clinopyroxene and basaltic melt and a europium-in-plagioclase-clinopyroxene oxybarometer for cumulate rocks","authors":"Nicholas Dygert ,&nbsp;Dian Ji ,&nbsp;Emily N. Etheridge","doi":"10.1016/j.gca.2025.02.003","DOIUrl":"10.1016/j.gca.2025.02.003","url":null,"abstract":"<div><div>Under geologically relevant conditions, Eu is a multivalent element, exhibiting divalent character in reduced systems and trivalent character in oxidized systems. Its mineral-melt and mineral-mineral partitioning behavior is sensitive to oxygen fugacity (<em>f</em>O₂) and can be leveraged in oxybarometers that recover <em>f</em>O₂s from natural samples if the partitioning behaviors of the divalent and trivalent species are known. Here, we parameterize a lattice strain-based predictive model for partitioning of divalent elements between basaltic silicate melts and the clinopyroxene M2 site. The model accurately and precisely recovers experimentally determined partition coefficients (Sr, Ca, Mn and Zn) as a function of pyroxene composition and temperature. The new divalent element partitioning model is coupled with published trivalent element partitioning models to develop an <em>f</em>O₂-, temperature- and composition-dependent clinopyroxene-melt Eu partitioning model. The clinopyroxene-melt Eu partitioning model is coupled with a plagioclase-melt Eu partitioning model to develop a Eu-in-plagioclase-clinopyroxene oxybarometer for cumulate rocks. Applied to lower crustal gabbros from oceanic lithosphere exposed at the southern Samail ophiolite and the east Pacific rise (Hess Deep), the oxybarometer recovers <em>f</em>O₂s indistinguishable from the fayalite-magnetite-quartz buffer within error (∼±0.5 log units), in agreement with basaltic glasses from mid-ocean ridges. Kinetic analysis is applied to evaluate the time-dependent response of the oxybarometer to a change in temperature. Eu³⁺ diffusion is much slower than Eu²⁺ diffusion; nonetheless, under moderately to highly reducing conditions, <em>f</em>O₂s recovered using the oxybarometer approach equilibrium conditions over timescales of 1000s of years, even while Eu³⁺ exchange is still active.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"394 ","pages":"Pages 148-163"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Theoretical and experimental constraints on hydrogen isotope equilibrium in C1–C5 alkanes” [Geochim. Cosmochim. Acta 386 (2024) 63–73]","authors":"Hao Xie,&nbsp;Michael J. Formolo,&nbsp;Alex L. Sessions,&nbsp;John M. Eiler","doi":"10.1016/j.gca.2025.01.044","DOIUrl":"10.1016/j.gca.2025.01.044","url":null,"abstract":"","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"395 ","pages":"Pages 279-280"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of temperature on 2H/1H fractionation in semi-continuous cultures of a marine diatom, coccolithophore, and dinoflagellate","authors":"Jiawei Gao ,&nbsp;Rong Bi ,&nbsp;Julian P. Sachs ,&nbsp;Hailong Zhang ,&nbsp;Yunning Cao ,&nbsp;Matthew D. Wolhowe ,&nbsp;Weiguo Liu ,&nbsp;Meixun Zhao","doi":"10.1016/j.gca.2025.02.005","DOIUrl":"10.1016/j.gca.2025.02.005","url":null,"abstract":"<div><div>Temperature regulates the metabolic rate of organisms and, together with salinity, determines seawater density, a key driver of ocean circulation and heat transport. The hydrogen isotope composition (²H/¹H) of phytoplankton lipids has been shown to vary systematically with salinity and applied as a paleosalinity proxy in marine sediments. The influence of temperature on ²H/¹H ratios of lipids from different phytoplankton groups remains poorly constrained, especially when other growth parameters known to influence ²H/¹H fractionation are held constant, such as growth rate, irradiance, and salinity. We investigated ²H/¹H ratios responses of lipid biomarkers (fatty acids (FAs), sterols and alkenones) to temperature (12 ∼ 27 °C) in three marine phytoplankton taxa, the diatom <em>Phaeodactylum tricornutum</em>, the dinoflagellate <em>Prorocentrum donghaiense</em>, and the coccolithophorid <em>Emiliania huxleyi</em> using semi-continuous cultures. We show that ²H/¹H fractionation of FAs in the dinoflagellate decreased by 2.2 ± 0.3 ‰ °C^–1 (<em>p</em> &lt; 0.05), while that of sterols in the dinoflagellate and fatty acid C_14:0 in the diatom increased by 2.3 ‰ °C^–1 and 1.9 ‰ °C^–1 (<em>p</em> &lt; 0.05), respectively, as temperature increased. ²H/¹H fractionation of the three types of lipids in the coccolithophores did not vary systematically with temperature. The underlying mechanism by which temperature alters lipid ²H/¹H fractionation likely involves its effect on the proportions of photosynthetic and metabolic NADPH incorporated into lipids, NADPH residence time in the chloroplast, the contribution of extra-plastidic pyruvate to FA synthesis, and the proportion of mevalonic acid- versus methylerythritol phosphate-derived precursors in sterols.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"393 ","pages":"Pages 86-97"},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Moderately volatile elements in chondrites record chondrule formation, two-component mixing and redistribution on parent bodies","authors":"Ninja Braukmüller ,&nbsp;Claudia Funk ,&nbsp;Wafa Abouchami ,&nbsp;Harvey Pickard ,&nbsp;Mark Rehkämper ,&nbsp;Alessandro Bragagni ,&nbsp;Stephen J.G. Galer ,&nbsp;Carsten Münker ,&nbsp;Harry Becker ,&nbsp;Frank Wombacher","doi":"10.1016/j.gca.2025.02.001","DOIUrl":"10.1016/j.gca.2025.02.001","url":null,"abstract":"<div><div>Most chondrites are depleted in moderately volatile elements (MVE) relative to the bulk solar system composition represented by CI chondrites. Here we present high-precision isotope dilution data for 11 moderately volatile elements (S, Cu, Zn, Ga, Se, Ag, Cd, In, Sn, Te and Tl) together with Cd and Zn stable isotope compositions for carbonaceous, ordinary, enstatite and Rumuruti chondrites complemented by a literature compilation of MVE stable isotope compositions. Together these data allow new insights into the processes that led to MVE depletion in chondrites and their redistribution within parent bodies.</div><div>Moderately volatile element abundances in carbonaceous, ordinary and Rumuruti chondrites are best explained by two-component mixing between a chemically CI-like MVE-rich matrix and an MVE-poor refractory component dominated by chondrules. Chondrules are enriched in light MVE isotopes due to kinetic recondensation of a small vapor fraction initially lost from chondrules upon heating. Later, thermal metamorphism redistributed some MVE within chondrite parent bodies, which is evaluated here in a systematic way for different chondrite groups and plateau volatile elements based on related and comparatively large but unsystematic stable isotope fractionation. Compared to other chondrite classes, enstatite chondrites show less systematic MVE abundance patterns when the elements are plotted as a function of condensation temperatures. Type 3 and 4 enstatite chondrites are more MVE-rich than expected based on their low matrix fractions and are enriched in light Zn and Te isotopes relative to CI. The enrichment of light Zn and Te isotopes and high MVE abundances in type 3 and 4 enstatite chondrites relative to CI can be explained by recondensation of a larger MVE vapor fraction after chondrule formation than observed for other chondrite classes, which presumably occurred at comparatively high H₂ pressures. Because MVE abundances and isotope compositions are fully consistent with chondrule formation, two-component mixing and MVE redistribution on parent bodies, we refute partial condensation from a hot solar nebula as the cause for MVE depletion in chondrite formation regions of the protoplanetary disk.</div></div>","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"393 ","pages":"Pages 43-62"},"PeriodicalIF":4.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143379268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}