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Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission

We report on the mineralogical and chemical properties of materials investigated by the lunar rover Yutu-2, which landed on the Von Kármán crater in the pre-Nectarian South Pole–Aitken (SPA) basin. Yutu-2 carried several scientific payloads, including the Visible and Near-infrared Imaging Spectromet...

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Autores principales: Zeng, Qinghong, Chen, Shengbo, Zhang, Yuanzhi, Mu, Yongling, Dai, Rui, Yang, Congyu, Li, Anzhen, Lu, Peng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322253/
https://www.ncbi.nlm.nih.gov/pubmed/34326350
http://dx.doi.org/10.1038/s41598-021-93694-8
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author Zeng, Qinghong
Chen, Shengbo
Zhang, Yuanzhi
Mu, Yongling
Dai, Rui
Yang, Congyu
Li, Anzhen
Lu, Peng
author_facet Zeng, Qinghong
Chen, Shengbo
Zhang, Yuanzhi
Mu, Yongling
Dai, Rui
Yang, Congyu
Li, Anzhen
Lu, Peng
author_sort Zeng, Qinghong
collection PubMed
description We report on the mineralogical and chemical properties of materials investigated by the lunar rover Yutu-2, which landed on the Von Kármán crater in the pre-Nectarian South Pole–Aitken (SPA) basin. Yutu-2 carried several scientific payloads, including the Visible and Near-infrared Imaging Spectrometer (VNIS), which is used for mineral identification, offering insights into lunar evolution. We used 86 valid VNIS data for 21 lunar days, with mineral abundance obtained using the Hapke radiative transfer model and sparse unmixing algorithm and chemical compositions empirically estimated. The mineralogical properties of the materials at the Chang’E-4 (CE-4) site referred to as norite/gabbro, based on findings of mineral abundance, indicate that they may be SPA impact melt components excavated by a surrounding impact crater. We find that CE-4 materials are dominated by plagioclase and pyroxene and feature little olivine, with 50 of 86 observations showing higher LCP than HCP in pyroxene. In view of the effects of space weathering, olivine content may be underestimated, with FeO and TiO(2) content estimated using the maturity-corrected method. Estimates of chemical content are 7.42–18.82 wt% FeO and 1.48–2.1 wt% TiO(2), with a low-medium Mg number (Mg # ~ 55). Olivine-rich materials are not present at the CE-4 landing site, based on the low-medium Mg #. Multi-origin materials at the CE-4 landing site were analyzed with regard to concentrations of FeO and TiO(2) content, supporting our conclusion that the materials at CE-4 do not have a single source but rather are likely a mixture of SPA impact melt components excavated by surrounding impact crater and volcanic product ejecta.
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spelling pubmed-83222532021-07-30 Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission Zeng, Qinghong Chen, Shengbo Zhang, Yuanzhi Mu, Yongling Dai, Rui Yang, Congyu Li, Anzhen Lu, Peng Sci Rep Article We report on the mineralogical and chemical properties of materials investigated by the lunar rover Yutu-2, which landed on the Von Kármán crater in the pre-Nectarian South Pole–Aitken (SPA) basin. Yutu-2 carried several scientific payloads, including the Visible and Near-infrared Imaging Spectrometer (VNIS), which is used for mineral identification, offering insights into lunar evolution. We used 86 valid VNIS data for 21 lunar days, with mineral abundance obtained using the Hapke radiative transfer model and sparse unmixing algorithm and chemical compositions empirically estimated. The mineralogical properties of the materials at the Chang’E-4 (CE-4) site referred to as norite/gabbro, based on findings of mineral abundance, indicate that they may be SPA impact melt components excavated by a surrounding impact crater. We find that CE-4 materials are dominated by plagioclase and pyroxene and feature little olivine, with 50 of 86 observations showing higher LCP than HCP in pyroxene. In view of the effects of space weathering, olivine content may be underestimated, with FeO and TiO(2) content estimated using the maturity-corrected method. Estimates of chemical content are 7.42–18.82 wt% FeO and 1.48–2.1 wt% TiO(2), with a low-medium Mg number (Mg # ~ 55). Olivine-rich materials are not present at the CE-4 landing site, based on the low-medium Mg #. Multi-origin materials at the CE-4 landing site were analyzed with regard to concentrations of FeO and TiO(2) content, supporting our conclusion that the materials at CE-4 do not have a single source but rather are likely a mixture of SPA impact melt components excavated by surrounding impact crater and volcanic product ejecta. Nature Publishing Group UK 2021-07-29 /pmc/articles/PMC8322253/ /pubmed/34326350 http://dx.doi.org/10.1038/s41598-021-93694-8 Text en © The Author(s) 2021, corrected publication 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Zeng, Qinghong
Chen, Shengbo
Zhang, Yuanzhi
Mu, Yongling
Dai, Rui
Yang, Congyu
Li, Anzhen
Lu, Peng
Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission
title Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission
title_full Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission
title_fullStr Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission
title_full_unstemmed Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission
title_short Mineralogical and chemical properties inversed from 21-lunar-day VNIS observations taken during the Chang’E-4 mission
title_sort mineralogical and chemical properties inversed from 21-lunar-day vnis observations taken during the chang’e-4 mission
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322253/
https://www.ncbi.nlm.nih.gov/pubmed/34326350
http://dx.doi.org/10.1038/s41598-021-93694-8
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