{"type": "FeatureCollection", "features": [{"id": "10.1016/j.chemgeo.2019.119279", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:46Z", "type": "Journal Article", "created": "2019-08-15", "title": "Volatile loss under a diffusion-limited regime in tektites: Evidence from tin stable isotopes", "description": "Abstract   Tektites are glasses derived from near-surface continental crustal rocks that were molten and ejected from the Earth's surface during hypervelocity meteorite impacts. They are among the driest terrestrial samples, although the exact mechanism of water loss and the behaviour of other volatile species during these processes are debated. Based on the difference in magnitude of the Cu and Zn isotopic fractionations in tektites, and the difference of diffusivity between these elements, it was suggested that volatile loss was diffusion-limited. Tin is potentially well suited to testing this model, as it has a lower diffusivity in silicate melts than both Cu and Zn, but a similar volatility to Zn. Here, we analysed the Sn stable isotopic composition in a suite of seven tektites, representing three of the four known tektite strewn fields, and for which Zn and Cu isotopes were previously reported. Tin is enriched in the heavier isotopes (\u22652.5\u2030 on the 122Sn/118Sn ratio) in tektites, correlated with the degree of Sn elemental depletion in their respective samples as well as with Cu and Zn isotope ratios, implying a common control. While the isotope fractionation of Sn, Cu and Zn is a result of volatility, the magnitude of isotope fractionation is strongly moderated by their relative rates of diffusion in the molten tektite droplets. An Australasian Muong Nong-type tektite analysed has the least Sn depletion and Sn isotope fractionation, consistent with these samples being more proximal to the source and experiencing a shorter time at high temperatures.", "keywords": ["Volatiles", "ORIGIN", "FRACTIONATION", "01 natural sciences", "Tektites", "[SDU] Sciences of the Universe [physics]", "EVAPORATION", "ZINC", "105105 Geochemistry", "SILICATE MELTS", "Tin", "DISSOLUTION", "13. Climate action", "Impacts", "105105 Geochemie", "GEOCHEMISTRY", "CU", "GEOLOGICAL-MATERIALS", "Stable isotopes", "IMPACT GLASSES", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.chemgeo.2019.119279"}, {"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.2019.119279", "name": "item", "description": "10.1016/j.chemgeo.2019.119279", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.chemgeo.2019.119279"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-12-01T00:00:00Z"}}, {"id": "10.1016/j.epsl.2016.12.008", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:01Z", "type": "Journal Article", "created": "2016-12-22", "title": "Chromium isotope evidence in ejecta deposits for the nature of Paleoproterozoic impactors", "description": "Non-mass dependent chromium isotopic signatures have been successfully used to determine the presence and identification of extra-terrestrial materials in terrestrial impact rocks. Paleoproterozoic spherule layers from Greenland (Graenseso) and Russia (Zaonega), as well as some distal ejecta deposits (Lake Superior region) from the Sudbury impact (1,849 +/- 0.3 Ma) event, have been analyzed for their Cr isotope compositions. Our results suggest that 1) these distal ejecta deposits are all of impact origin, 2) the Graenseso and Zaonega spherule layers contain a distinct carbonaceous chondrite component, and are possibly related to the same impact event, which could be Vredefort (2,023 +/- 4 Ma) or another not yet identified large impact event from that of similar age, and 3) the Sudbury ejecta record a complex meteoritic signature, which is different from the Graenseso and Zaonega spherule layers, and could indicate the impact of a heterogeneous chondritic body.", "keywords": ["TERRESTRIAL", "KARELIA", "impact ejecta", "FOS: Physical sciences", "01 natural sciences", "METEORITIC COMPONENTS", "SOLAR-SYSTEM", "[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology", "[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "SOUTH GREENLAND", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "GEOCHEMICAL EVIDENCE", "Vredefort", "Sudbury", "0105 earth and related environmental sciences", "Earth and Planetary Astrophysics (astro-ph.EP)", "crater", "KETILIDIAN OROGEN", "meteorite", "EARLY EARTH", "105105 Geochemistry", "EVENT", "13. Climate action", "chromium isotopes", "[SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology", "105105 Geochemie", "SPHERULES", "Astrophysics - Earth and Planetary Astrophysics"]}, "links": [{"href": "https://doi.org/10.1016/j.epsl.2016.12.008"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Earth%20and%20Planetary%20Science%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.epsl.2016.12.008", "name": "item", "description": "10.1016/j.epsl.2016.12.008", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.epsl.2016.12.008"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-02-01T00:00:00Z"}}, {"id": "10.1111/maps.13312", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:18:54Z", "type": "Journal Article", "created": "2019-06-10", "title": "Identification of a meteoritic component using chromium isotopic composition of impact rocks from the Lonar impact structure, India", "description": "Abstract<p>The existence of mass\uffe2\uff80\uff90independent chromium isotope variability of nucleosynthetic origin in meteorites and their components provides a means to investigate potential genetic relationship between meteorites and planetary bodies. Moreover, chromium abundances are depleted in most surficial terrestrial rocks relative to chondrites such that Cr isotopes are a powerful tool to detect the contribution of various types of extra\uffe2\uff80\uff90terrestrial material in terrestrial impactites. This approach can thus be used to constrain the nature of the bolide resulting in breccia and melt rocks in terrestrial impact structures. Here, we report the Cr isotope composition of impact rocks from the ~0.57\uffc2\uffa0Ma Lonar crater (India), which is the best\uffe2\uff80\uff90preserved impact structure excavated in basaltic target rocks. Results confirm the\uffc2\uffa0presence of a chondritic component in several bulk rock samples of up to 3%. The impactor that created the Lonar crater had a composition that was most likely similar to that of carbonaceous chondrites, possibly a CM\uffe2\uff80\uff90type chondrite.</p>", "keywords": ["TERRESTRIAL", "TARGET ROCKS", "SYSTEMATICS", "KeyWords Plus:TARGET ROCKS", "01 natural sciences", "PROJECTILES", "[SDU] Sciences of the Universe [physics]", "INSIGHTS", "105105 Geochemistry", "13. Climate action", "CRATER", "GLASSES", "105105 Geochemie", "MELT ROCKS", "PETROGRAPHY", "GEOCHEMISTRY", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.13312"}, {"href": "https://doi.org/10.1111/maps.13312"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Meteoritics%20%26amp%3B%20Planetary%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/maps.13312", "name": "item", "description": "10.1111/maps.13312", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/maps.13312"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-06-09T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=105105+Geochemie&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=105105+Geochemie&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=105105+Geochemie&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=105105+Geochemie&offset=3", "hreflang": "en-US"}], "numberMatched": 3, "numberReturned": 3, "distributedFeatures": [], "timeStamp": "2026-05-25T16:30:03.595177Z"}