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<strong>Key points:</strong>
<p>Three meteorites (<strong>Blaubeuren</strong>, <strong>Cloppenburg</strong>, and <strong>Machtenstein</strong>) found in Germany were recently identified as H-group ordinary chondrites.</p>
<p>Two of the meteorites had been previously recovered but were only identified as meteorites after further analysis.</p> <p>The study aims to fully characterize these meteorites based on their mineral composition, primarily <strong>olivine</strong> and * <strong>low-Ca pyroxene</strong>.</p> <p><strong>Blaubeuren</strong> and <strong>Cloppenburg</strong> have a visible brecciated texture, common in chondrites, while <strong>Machtenstein’s</strong> texture is less apparent.</p> <p>Shock levels were classified as <strong>S2</strong> for Blaubeuren and Machtenstein and <strong>S3</strong> for Cloppenburg.</p><p>Weathering has significantly impacted all three meteorites, eroding their fusion crust and metal content.* </p><p>Oxygen isotope compositions align with other H chondrites, though <strong>Cloppenburg</strong> shows disturbance from terrestrial weathering.</p><p><strong>Cloppenburg</strong> contains <strong>vivianite</strong>, a rare hydrated iron phosphate mineral, indicating weathering in a wet environment.</p><p>Terrestrial ages for Blaubeuren (~9.2 ka), Cloppenburg (~5.4 ka), and Machtenstein (~1.8 ka) show similarity to meteorites from wet environments.</p> <p>Overall, metal elements such as <strong>Fe</strong>, <strong>Co</strong>, and <strong>Ni</strong> have been altered, except for Co and Ni in Machtenstein, likely due to its shorter terrestrial age.</p>
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Replication Data for: Blaubeuren, Cloppenburg, and Machtenstein—Three recently recognized H-group chondrite finds in Germany with distinct terrestrial ages and weathering effects