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Ejecta from Chaffee S Crater in Chang'E-6 Landing Site Constrained by Seifertite-Bearing Norite.

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Bibliographic Details
Title: Ejecta from Chaffee S Crater in Chang'E-6 Landing Site Constrained by Seifertite-Bearing Norite.
Authors: Zhou, Zhan1,2 (AUTHOR), Hu, Sen1,2 (AUTHOR) husen@mail.iggcas.ac.cn, Gao, Yubing1,2 (AUTHOR), Li, Linxi1,2 (AUTHOR), He, Huicun1 (AUTHOR), Gao, Liang1,2 (AUTHOR), Qiu, Mengfan1,2 (AUTHOR), Gu, Lixin1 (AUTHOR), Tang, Xu1 (AUTHOR), Li, Xiaoguang3 (AUTHOR), Yang, Wei1,2 (AUTHOR), Lin, Yangting1,2 (AUTHOR), Li, Xian-Hua3 (AUTHOR), Wu, Fu-Yuan3 (AUTHOR)
Source: Journal of Earth Science. Jun2026, Vol. 37 Issue 3, p1487-1492. 6p.
Subject Terms: *Lunar craters, *Lunar soil, *Mafic rocks, *Minerals, *Lunar surface, *Metamorphism (Geology), *Meteorite craters
Geographic Terms: China
Abstract: The article focuses on the identification and analysis of a seifertite-bearing norite clast (EGP15-G32) found in the lunar soil returned by China’s Chang’E-6 (CE6) mission from the Apollo Basin within the South Pole–Aitken Basin. Through integrated petrographic, geochemical, and shock metamorphism studies, the clast is characterized as a highly shocked Mg-suite norite, distinct from local mare basalts, with shock pressures estimated at 24–40 GPa indicated by the coexistence of maskelynite and seifertite (a high-pressure silica polymorph). Combining mineralogical data with impact modeling and regional geology, the study constrains the Chaffee S crater as the likely source of this exotic ejecta, providing insights into material transport and crustal diversity on the lunar farside. This approach demonstrates the utility of high-pressure mineralogy in tracing the provenance of non-mare components in lunar samples. [Extracted from the article]
Database: Energy & Power Source
Description
Abstract:The article focuses on the identification and analysis of a seifertite-bearing norite clast (EGP15-G32) found in the lunar soil returned by China’s Chang’E-6 (CE6) mission from the Apollo Basin within the South Pole–Aitken Basin. Through integrated petrographic, geochemical, and shock metamorphism studies, the clast is characterized as a highly shocked Mg-suite norite, distinct from local mare basalts, with shock pressures estimated at 24–40 GPa indicated by the coexistence of maskelynite and seifertite (a high-pressure silica polymorph). Combining mineralogical data with impact modeling and regional geology, the study constrains the Chaffee S crater as the likely source of this exotic ejecta, providing insights into material transport and crustal diversity on the lunar farside. This approach demonstrates the utility of high-pressure mineralogy in tracing the provenance of non-mare components in lunar samples. [Extracted from the article]
ISSN:1674487X
DOI:10.1007/s12583-026-2050-7