A whole-scale volatile-depleted lunar interior

• 成果类型: Article
• 署名作者: Dai, Wei; Moynier, Frederic; Long, Zheng- Yu; Fang, Linru; Day, James M. D.; Paquet, Marine; Siebert, Julien
• 署名单位: Universite Paris Cite; Centre National de la Recherche Scientifique (CNRS); University of Copenhagen; University of California System; University of California San Diego; Scripps Institution of Oceanography; Universite de Lorraine; Centre National de la Recherche Scientifique (CNRS)
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14529
• DOI: 10.1073/pnas.2422726122
• 发表日期: 2025-06-03
• 关键词: potassium isotopic compositions; meteorite dhofar 287a; miller range 05035; silicate melts; impact origin; moon; earth; zinc; petrogenesis; magmatism

摘要

The extent of moderately volatile elements (MVE) depletion and its effects on the Moon's evolutionary history remain contentious, partly due to unintentionally biased sampling by the Apollo missions from the Procellarum KREEP Terrane. In this study, we analyzed the Zn and K isotope compositions of a series of lunar basaltic meteorites, which vary in Th content and are likely to represent a broader sampling range than previous studies, including samples from the far side of the Moon. Our findings indicate remarkably consistent Zn and K isotope compositions across all lunar basalt types, despite significant variations in Th content. This consistency suggests a relatively homogeneous isotopic composition of volatile elements within the Moon, unaffected by subsequent impact events that formed major basins. Our results suggest that the estimates of MVE abundance and isotopic compositions from the Apollo returned samples are likely representative of the bulk Moon, supporting a globally volatile-depleted lunar interior.