Earth and Planetary Science Letters最新文献

{"title":"Direct pathway of incorporating dietary nitrogen in shell-bound matrix of the planktic foraminifera Trilobatus sacculifer","authors":"Wei-Ning Fang ,&nbsp;Oscar Branson ,&nbsp;Er-Wen Yang ,&nbsp;Wen-Hui Chen ,&nbsp;Ren-Yi Cai-Li ,&nbsp;Howard J. Spero ,&nbsp;Jennifer Fehrenbacher ,&nbsp;Lael Vetter ,&nbsp;Charlotte LeKieffre ,&nbsp;Haojia Ren","doi":"10.1016/j.epsl.2025.119231","DOIUrl":"10.1016/j.epsl.2025.119231","url":null,"abstract":"<div><div>The stable isotopes of organic nitrogen (N) preserved within the fossil tests of foraminifera have been used to reconstruct past changes in surface ocean nitrogen cycling processes. Modern observations show temporal and spatial covariations of δ¹⁵N between planktic foraminifera and particulate organic matter in the surface ocean, suggesting that heterotrophic foraminifera record the N isotopic compositions of their diet. However, little is known about the underlying mechanisms of N translocation from diet into foraminiferal biomass (<em>i.e.</em>, intrashell protoplasm) and finally embedded within their mineralized shells. We investigate the pathways of N uptake from diet into foraminiferal calcite tests by feeding the planktic, dinoflagellate-bearing <em>Trilobatus sacculifer</em> with two strains of brine shrimp (<em>Artemia</em>) with different ¹⁵N/¹⁴N isotopic compositions, and monitoring the δ¹⁵N evolution of both biomass and shell-bound matrix. The two feeding groups show comparable results, that δ¹⁵N of both the biomass and shell-bound matrix evolve towards their diet sources without expressing trophic enrichment in δ¹⁵N. However, we observe that the δ¹⁵N of the biomass and shell-bound matrix exhibit distinct mixing behaviors. Biomass δ¹⁵N is well modelled as a mixture between the original biomass and newly metabolised dietary intake, suggesting <em>T. sacculifer</em> has a closed N system with minimum N leakage. Meanwhile, shell-bound δ¹⁵N quickly approaches the δ¹⁵N of the diet, and is offset from the biomass δ¹⁵N. This indicates a direct pathway of N incorporation from the diet into shell-bound organics during calcification, without significant exchange with the overall biomass pool.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"654 ","pages":"Article 119231"},"PeriodicalIF":4.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421189","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":"Coeval formation of continental crust and cratonic mantle facilitated by surface material recycling in the Paleoarchean: Constraints from molybdenum isotopes","authors":"Sukalpa Chatterjee ,&nbsp;Arathy Ravindran ,&nbsp;Qasid Ahmad ,&nbsp;Om Prakash Pandey ,&nbsp;Martin Wille ,&nbsp;Klaus Mezger","doi":"10.1016/j.epsl.2025.119227","DOIUrl":"10.1016/j.epsl.2025.119227","url":null,"abstract":"<div><div>The formation of cratons was a fundamental process on Earth during the Archean. Cratons are characterized by a stable lithosphere consisting of felsic continental crust overlying a lithospheric mantle. The spatial and temporal relationship of these two distinct reservoirs can be reconstructed from mafic dyke swarms that are sourced from the cratonic mantle and intruded the Archean cratons over time. Trace element abundances of four dyke swarms that intruded the Singhbhum Craton between 2.8 Ga and 1.8 Ga combined with stable Mo and radiogenic Hf and Nd isotopes indicate that the crustal enrichment signature in the parental magma of the dykes was due to earlier enrichment of their respective mantle sources. The covariation of δ^98/95Mo with mobile/immobile element ratio indicate that hydrous melts originating from recycled surface-derived materials led to metasomatism in the mantle source region of the mafic dykes. A redox-dependent multicomponent element (Mo, Ce) and isotope (δ^98/95Mo, εHf_, εNd) mixing model affirms that the metasomatism of the Singhbhum cratonic mantle was facilitated by reduced low-degree melts derived from recycled sediments and hydrated mafic crust. The mixing model further suggests that the cratonic lithosphere of the Singhbhum Craton was metasomatized in the Paleoarchean around 3.44 Ga, which is synchronous with the formation of Singhbhum granitoids. This is one of the oldest geochemical indications of mantle metasomatism on Earth. The radiogenic isotopes and δ^98/95Mo reveal that even in the Paleoarchean, recycling of surface-derived reduced material at least locally by horizontal tectonics was active on Earth and this process played a critical role in the formation of stable cratons.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"654 ","pages":"Article 119227"},"PeriodicalIF":4.8,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420676","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":"The spatio-temporal evolution of 182W and 142Nd in the Deccan-La Réunion plume","authors":"Josua J. Pakulla ,&nbsp;Jonas Tusch ,&nbsp;Eric Hasenstab-Dübeler ,&nbsp;Arathy Ravindran ,&nbsp;Mike W. Jansen ,&nbsp;Felipe P. Leitzke ,&nbsp;Purva Gadpallu ,&nbsp;Raymond A. Duraiswami ,&nbsp;Carsten Münker","doi":"10.1016/j.epsl.2025.119225","DOIUrl":"10.1016/j.epsl.2025.119225","url":null,"abstract":"<div><div>Variations of the short-lived decay products ¹⁸²W and ¹⁴²Nd that formed approximately during the first 60 and 500 million years after solar system formation are pivotal in our understanding of Hadean processes and homogenization of Earth's mantle. For example, a coupling of ¹⁴²Nd and ¹⁸²W anomalies for the Deccan-La Réunion plume has been previously suggested to mirror a combined involvement of core-mantle interaction and Hadean silicate material, possibly stored in Large Low Shear Wave Velocity Provinces (LLSVPs). However, the limited availability of such short-lived isotope data for basalts from the Deccan Volcanic Province (DVP) made it difficult to assess this model closely. In this study, we provide new combined µ¹⁴²Nd and µ¹⁸²W data for ten selected samples of the DVP and one TTG from the Dharwar Craton basement, now covering different mantle endmembers of the DVP. Additionally, we provide new µ¹⁴²Nd data for six volcanic rocks from La Réunion that were previously analyzed for ¹⁸²W. We do not find evidence for a correlation between µ¹⁴²Nd and µ¹⁸²W in contrast to previous suggestions. Our data show that the involvement of mantle lithosphere and crustal components influences the µ¹⁸²W compositions of the DVP samples. Values of µ¹⁸²W (-4.2 ± 3.0) of such contaminated DVP samples overlap with the compositional field of volcanic rocks from La Réunion (-4.9 ± 1.5). The asthenospheric endmember of the DVP displays resolvable larger µ¹⁸²W deficits as low as -12.0 ± 2.3. Additionally, the asthenospheric DVP endmember also displays more unradiogenic ²⁰⁶Pb/²⁰⁴Pb ratios and low Δ²⁰⁷Pb/²⁰⁶Pb compared to La Réunion lavas and DVP lavas that assimilated lithospheric material. With regards to the two endmember models previously proposed for W isotope anomalies in mantle plumes, neither core-derived W nor an ancient silicate component with anomalous ¹⁸²W can be completely ruled out at this stage. However, due to the covariation of Pb and W isotopes and lower W/Th ratios in asthenosphere-derived DVP lavas, we currently favour a recycled mafic restite component of Hadean age as a source for the ¹⁸²W deficits in the Deccan-La Réunion plume.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119225"},"PeriodicalIF":4.8,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313931","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":"Are long-lasting isotope trends independent from slab dynamics, upper-plate stress regime and crustal thickness? Insights from central Patagonia","authors":"Marie C. Genge ,&nbsp;César Witt ,&nbsp;Massimiliano Zattin ,&nbsp;Delphine Bosch ,&nbsp;Olivier Bruguier ,&nbsp;Stefano Mazzoli","doi":"10.1016/j.epsl.2025.119229","DOIUrl":"10.1016/j.epsl.2025.119229","url":null,"abstract":"<div><div>Understanding the interplay and impact of internal and external factors on magma composition is crucial for constraining crustal evolution, tectonic processes and global geochemical cycles in convergent continental margins. The integration of zircon isotope (Hf-O) and trace element analyses with U-Pb geochronology provides insights into temporal shifts in magma composition and reservoir evolution. However, debates persist regarding the role of external and internal factors in magma evolution, particularly in complex subduction zones. To address this issue, we examined detrital zircon samples from central Patagonia (45°S–48°S), which is renowned for extensive continental arc magmatism since the Late Triassic. With alternating phases of shallow- and steeply-dipping slab lasting &lt; 50 million years, and apparent minimal changes in crustal thickness until the Miocene, this region offers a valuable opportunity to study the influence of internal and external factors on magma composition changes through time. Our study unraveled long-term trends for Hf-O and some trace elements ratios spanning at least 70 Myr. Such trends appear to be primarily related with crustal thickness of the overriding plate, and only secondarily with slab dynamics or upper-crustal stress regime. During time spans characterized by a thin crust (Jurassic to late Paleogene), external forcing controlled magma depletion and enrichment trends. Depletion resulted from the solely or concurrent effects of depleted components addition from: (i) the upwelling of a moderately depleted mantle triggered by slab rollback (Jurassic – Early Cretaceous and late Paleogene), or (ii) opening of slab tear/window in adjacent regions (Late Cretaceous – early Paleogene), as well as (iii) melting of the altered oceanic crust (Early – Late Cretaceous) or (iv) subduction of sediments derived from the erosion of juvenile forearc units (Paleogene). Conversely, contribution of enriched units of the forearc may have triggered the gradual enrichment observed during the Paleogene. However, the sudden enrichment during the Neogene has been related to a more effective crustal assimilation process during the Miocene Andean orogeny, characterized by amphibole fractionation and thus moderate crustal thickening. Our findings revealed that, depending on crustal thickness, either internal or external factors control long-term arc magma evolution. Internal factors are dominant in thicker-crust settings, while external factors – enabling mantle upwelling, slab melt or sediment subduction, which in turn affect mantle wedge composition – govern thin-crust settings.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119229"},"PeriodicalIF":4.8,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313930","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":"Identifying large vulnerable water reservoirs using passive seismic monitoring","authors":"R. Kramer ,&nbsp;Y. Lu ,&nbsp;Q.-Y. Wang ,&nbsp;S. Serafin ,&nbsp;A. Ceppi ,&nbsp;G. Bokelmann","doi":"10.1016/j.epsl.2025.119223","DOIUrl":"10.1016/j.epsl.2025.119223","url":null,"abstract":"<div><div>Seismic waves capture important insights into subsurface behavior. We introduce an adapted coda-wave interferometry approach to monitor the spatial variability of semi-daily periodic seismic velocity changes on a regional scale, applied to data collected across South and Central Europe. Our results reveal a broad spatial correlation between seismic velocity changes and air pressure fluctuations, suggesting that air pressure is the dominant driving force. Specifically, air pressure fluctuations modulate saturation levels within the capillary zone through the dynamic interplay between fluid and gaseous phases, producing significant seismic velocity changes. The mechanism explains the large variations observed in regions with high connectivity between the surface and saturated zone. We associate this enhanced interaction with the high vulnerability of shallow water resources. We propose inspecting semi-daily periodic seismic velocity changes as a new tool for gaining a regional view of water reservoir vulnerability.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119223"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313715","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":"The role of mantle inheritance and refertilization during breakup at magma-poor rifted margins: What can we learn from the SW-Australia margin?","authors":"Mélanie Ballay,&nbsp;Marc Ulrich,&nbsp;Gianreto Manatschal","doi":"10.1016/j.epsl.2025.119212","DOIUrl":"10.1016/j.epsl.2025.119212","url":null,"abstract":"<div><div>The study of mantle-melt interactions at magma-poor rifted margins, accounting for about half of the world margins, is so far limited by the access to samples. Present concepts are therefore mainly based on studies of the Western Tethys and southern North Atlantic domain, and it remains unclear if they are applicable to other magma-poor rifted margins. Here, we present a study of well-preserved peridotites dredged along the southwestern Australian margin (Diamantina Zone). Our petrological data show that two types of peridotites occur: spinel lherzolite, which represents the inherited subcontinental mantle (SCLM) before the separation of Australia and Antarctica, and plagioclase peridotite formed by syn-rift melt entrapment at low pressure in the plagioclase stability field during mantle exhumation. The observed mantle types as well as the mantle-melt processes identified in the Diamantina peridotites are very similar to those documented in the Alpine-Apennine and Iberia margins. Hence, the Alpine/Iberia model of magma-poor rifted margins may be globally applicable and does not depend on the SCLM inheritance. Remnants of mantle inheritance may be preserved in the refertilized mantle, suggesting a progressive transition from an inherited to a refertilized mantle during breakup. Finally, this study highlights the role of inheritance and refertilization as the main features controlling final rifting and breakup at magma-poor rifted margins.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119212"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313718","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":"Mechanism of shallow slow slip events in the Nankai Trough: Insights from laboratory friction experiments and numerical modeling","authors":"Junli Zhang,&nbsp;Matt J. Ikari","doi":"10.1016/j.epsl.2025.119216","DOIUrl":"10.1016/j.epsl.2025.119216","url":null,"abstract":"<div><div>Shallow slow slip events (SSEs) have attracted considerable attention due to their mutual interaction with earthquake processes, and are known to occur in the Nankai Trough, southwest Japan. To examine their underlying mechanisms, we conducted velocity-stepping friction experiments on intact core samples retrieved from IODP Site C0023 at the toe of Nankai accretionary prism and performed numerical modeling based on rate-and-state friction (RSF) laws. Our measurements show that fault zone samples transition from velocity weakening to velocity strengthening as slip velocities increase, and that some RSF parameters show a dependence on sliding velocity. Numerical models using velocity-dependent RSF parameters, constrained by our experimental data, successfully replicate SSEs comparable to those observed in the Nankai Trough, whereas models based on non-transitional frictional behavior (constant RSF parameters) or near-neutral stability (constant RSF parameters with extremely small velocity weakening) cannot. We propose that the transitional frictional behavior with increasing slip velocity is a key mechanism of shallow SSEs in this region. Furthermore, our findings document a weak thrust fault with potentially unstable slip behavior.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119216"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313716","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":"Response to comment by Cisneros et al. (2024)","authors":"Brad S. Singer ,&nbsp;Alec Baudry ,&nbsp;Brenhin Keller ,&nbsp;Brian R. Jicha ,&nbsp;Christie Jilly-Rehak ,&nbsp;Jorge A. Vazquez","doi":"10.1016/j.epsl.2025.119215","DOIUrl":"10.1016/j.epsl.2025.119215","url":null,"abstract":"","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119215"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313933","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":"Global comparative basin hypsometric analysis of Earth and Mars: Implications for early Mars climate","authors":"J. Fang ,&nbsp;W. Luo ,&nbsp;A.D. Howard ,&nbsp;R.A. Craddock ,&nbsp;E.A. Oliveira ,&nbsp;R.S. Pires","doi":"10.1016/j.epsl.2025.119226","DOIUrl":"10.1016/j.epsl.2025.119226","url":null,"abstract":"<div><div>While there is a consensus that water played at least some role in the formation of various Martian landforms, including valley networks (VNs), the specific mechanisms and climate conditions are still debated. Basin hypsometric curves, reflecting elevation distributions, offer insights into past processes and climates. Our study presents a global-scale comparison of basin hypsometry on Mars, Earth, the Moon, artificial fractal surfaces, and computer simulated landforms. Results indicate Martian VN formation likely occurred under a climate more arid than hyper-arid Earth, or under more humid periods that were short-lived. Differences in hypsometric attributes between Mars and the Moon suggest VN formation on Mars involved precipitation-driven water flow. Additionally, impact cratering significantly influenced Martian surface conditions, potentially disrupting fluvial erosion processes. This comparative analysis sheds light on the complex interplay of climatic factors and geological processes in Martian landscape evolution.</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119226"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313717","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":"Uncovering the xenon isotope composition of continental rift magmas: Insight from analysis of geothermal gases at Homa Hills, Kenya","authors":"B. Marty ,&nbsp;D. Contamine ,&nbsp;D.V. Bekaert ,&nbsp;A. Lastes ,&nbsp;R. Pik ,&nbsp;J. Labidi ,&nbsp;E.D. Young ,&nbsp;M.W. Broadley ,&nbsp;P.H. Barry ,&nbsp;D.J. Byrne ,&nbsp;A.M. Seltzer","doi":"10.1016/j.epsl.2025.119224","DOIUrl":"10.1016/j.epsl.2025.119224","url":null,"abstract":"<div><div>We investigated geothermal gases from Homa Hills, a carbonatitic complex situated along an adjacent branch of the Kenyan rift system, using neon, argon, krypton, xenon and nitrogen isotopes. Large quantities of gas were sampled in Giggenbach-type bottles (Giggenbach, 1975) and analyzed by dynamic mass spectrometry to resolve isotopic variations at high precision (0.01-0.1‰; Seltzer and Bekaert, 2022; Bekaert et al., 2023; 2024). Neon and nitrogen isotope compositions are consistent with parental magmas being derived from the convecting mantle. Xenon isotopic data present ubiquitous enrichments (relative to air) of ¹²⁹Xe from the decay of extinct ¹²⁹I (T_1/2 = 15.7 Myr) and ^131-136Xe_f from fissions of ²³⁸U (T_1/2 = 4.468 Myr) and/or ²⁴⁴Pu (T_1/2 = 82 Myr). We also find slight excesses of ¹²⁸Xe (relative to ¹³⁰Xe and air), which could be due to subsurface isotopic fractionation during e.g., diffusive transport fractionation (DTF) and gravitational settling. However, the ¹²⁸Xe excesses are not accompanied by correlated Kr isotope excesses and plot off the empirical fractionation line defined from several other locations worldwide (Bekaert et al., 2023). Instead, a detailed isotope deconvolution suggests the occurrence of either chondritic Xe (with mantle ¹³⁰Xe consisting of up to 22 % of chondritic ¹³⁰Xe) or recycled Xe from the Archean atmosphere could explain the observed Xe isotope signatures. The latter possibility would have profound implications for models of mantle-surface exchange throughout Earth history.</div><div>The fission spectra indicate a predominantly ²³⁸U origin for fissiogenic Xe, with contribution of ²⁴⁴Pu-derived Xe being negligible within uncertainties, implying extensive mantle degassing during the Hadean and Archean eons. The ¹²⁹Xe*/¹³⁶Xe* ratio (where * indicates non-atmospheric excesses of Xe isotopes) of Homa Hills samples correlates with other tracers of mantle/crust contributions such as He, Ar and N isotopes. Variations in ¹²⁹Xe*/¹³⁶Xe* among the different gases sampled at Homa Hills is mainly the result of contribution from fissiogenic Xe produced in uranium-rich crustal material. Therefore, this ratio may constitute a robust tracer of mantle-crust interactions. Given available high precision data (Bekaert et al., 2023; 2024; this work) together with mantle-derived rock data, ¹²⁹Xe*/¹³⁶Xe* appears homogenous in the convecting mantle, and comparable to values observed at mantle plumes. Such homogeneity is in sharp contrast with light noble gas systematics and may call for whole mantle convection and a core origin for He and Ne..</div></div>","PeriodicalId":11481,"journal":{"name":"Earth and Planetary Science Letters","volume":"653 ","pages":"Article 119224"},"PeriodicalIF":4.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143313719","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}