Spectral properties of lunar impact melt deposits from Moon Mineralogy Mapper (M3) data

Neish, C. D.; Cannon, K. M.; Tornabene, L. L.; Flemming, R. L.; Zanetti, M.; Pilles, E. A.

doi:10.1016/j.icarus.2021.114392

Cited by 11 publications

(12 citation statements)

References 55 publications

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“…This broad absorption band and relatively bright spectra are most consistent with the presence of a small amount of olivine or pyroxene, indicating that this is a plagioclase feldspar with a small mafic component. This interpretation is consistent with results from Neish et al (2021), whose M 3 spectral unmixing studies of the area concluded that the material around the southwest crater rim is more evolved and likely excavated material from the initial impact event.…”

Section: Spectral Regions Of Interestsupporting

confidence: 90%

“…The impact melt deposit to the north of the crater shows spectral minimaat approximately 950 and 2150 nm, suggesting that the impact melt is a clino-pyroxene, as shown in previous studies (Klima et al 2007(Klima et al , 2011. We confirm results from Neish et al (2021), who carried out a more detailed spectral unmixing analysis with M 3 data and mapped pyroxene to the north of Aristarchus crater. The spectra on the southwest crater rim look very similar to the plagioclase feldspar in the central crater peak.…”

Section: Spectral Regions Of Interestsupporting

confidence: 89%

“…The northeast crater rim of Aristarchus is a well-studied area with impact melt from the original impact event (Figures 2, 3). Impact melt compositions around Aristarchus crater are diverse (Neish et al 2021), and there are several possible explanations for the unique variety of impact melts observed in this region. Neish et al (2021) suggest that the most probable explanation is lithic clasts outside the walls of the crater contaminating impact melts.…”

Section: Impact Melt (Northeast Crater Rim)mentioning

confidence: 99%

“…Impact melt compositions around Aristarchus crater are diverse (Neish et al 2021), and there are several possible explanations for the unique variety of impact melts observed in this region. Neish et al (2021) suggest that the most probable explanation is lithic clasts outside the walls of the crater contaminating impact melts. Using NIR data from M 3 , Neish et al (2021) were able to conduct a spectral unmixing analysis of the area and identify endmembers in and around Aristarchus crater.…”

Section: Impact Melt (Northeast Crater Rim)mentioning

confidence: 99%

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New Insights into Aristarchus Crater with LRO LAMP Far-ultraviolet Observations

Czajka,

Retherford,

Kramer

et al. 2023

Planet. Sci. J.

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Aristarchus crater is a Copernican-age impact crater well known for its high-albedo ejecta blanket and nearby flow features rich in pyroclastic materials. The Lyman Alpha Mapping Project (LAMP) is a far-ultraviolet (FUV) spectrograph (57–197 nm) on board the Lunar Reconnaissance Orbiter (LRO). LAMP data identified Aristarchus crater as having a high Off-band (155–184 nm) to On-band (130–155 nm) albedo (Off/On) ratio, providing new insight into the mineral composition of the area. Previous LAMP observations of bright crater rays and lunar swirls show that regions of high Off/On-band ratios may indicate highly feldspathic compositions. In this study we use LAMP data to understand FUV compositional signatures at Aristarchus. We investigate four well-characterized regions of interest around Aristarchus crater, and we compare Off/On-band ratios at Aristarchus crater to laboratory-derived ratios of several endmembers such as anorthite and olivine. We further analyze LAMP FUV spectra alongside near-infrared spectra from the Moon Mineral Mapper (M3) on board Chandrayaan-1 to characterize the mineralogy in several regions of interest. We find that LAMP Off/On-band ratios are able to distinguish between plagioclase feldspars and minerals such as quartz and mafic-dominated compositions. The LAMP Off/On-band ratios at Aristarchus are higher than previously reported ratios for plagioclase-rich regions, suggesting that the composition is unique to Aristarchus. Spectra from LAMP and M3 both show that the central peak and high-albedo ejecta around Aristarchus contain shocked, possibly alkalic, plagioclase feldspar.

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Section: Spectral Regions Of Interestsupporting

confidence: 90%

Section: Spectral Regions Of Interestsupporting

confidence: 89%

Section: Impact Melt (Northeast Crater Rim)mentioning

confidence: 99%

Section: Impact Melt (Northeast Crater Rim)mentioning

confidence: 99%

See 2 more Smart Citations

New Insights into Aristarchus Crater with LRO LAMP Far-ultraviolet Observations

Czajka,

Retherford,

Kramer

et al. 2023

Planet. Sci. J.

View full text Add to dashboard Cite

show abstract

“…For example, the classification features of desert steppe species were constructed by the continuum removal of transformation vegetation indices, further constructing the decision tree model to classify the three important species of the Gegen Tara desert steppe [15]. Moreover, continuum removal is used to aid in the derivation water content from the reflectance spectra of lunar surface with the Lunar Mineralogical Spectrometer data [16] and investigate the features of the impact melt deposits of lunar craters based on the data from Chandrayaan-1's Moon Mineralogy Mapper [17].…”

Section: Introductionmentioning

confidence: 99%

A comparative study on continuum removal for Chang’E-4 VNIS hyperspectral data and its impact on elements retrieval

Wang

Zeng

et al. 2023

Fourteenth International Conference on Graphics and Image Processing (ICGIP 2022)

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Spectral absorption features are important parameters for lunar mineral identification and its abundance retrieval. The spectral absorption features of lunar regolith around 1000 nm (Band I) and 2000 nm (Band II) are significant weakened due to long-history space weathering. Continuum removal can effectively enhance the features of spectral absorption for lunar surface materials, which is particularly applicable for processing the in-situ hyperspectral data that obtained by the Visible and Near Infrared Spectrometer (VNIS) onboard Chang’E-4 Yutu-2 Rover that landed in Von Kármán crater. In this paper, three types of functions, i.e., linear, the second-order parabola polynomial and the piecewise polynomial functions, are used to fit the continuum of VNIS spectra, and further accessing their influences on calculating the parameters of spectral absorption features. The study shows that the piecewise polynomial continuum performs the best in enhancing the spectral absorption features of VNIS data in Bands I and II. Both endpoints of the continuum can be found. The derived absorption features, such as band depth and centers are highly consistent with those obtained with ENVI software, who uses the full convex hull to determine spectral continuum. The difference between the piecewise polynomial method and full convex hull method in absorption band center and band area ratio is less than 1%. In addition, we tested the retrieval of Wo and Fs with the spectral feature parameters from different continuums and find that continuum composed by piecewise linear equation is appropriate.

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A Raman spectroscopy–compositional–structural investigation of lunar surface materials and analogues

Cloutis

Turenne

Sidhu

et al. 2022

Journal of Chemometrics

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We investigated the Raman spectroscopy of 35 rock and mineral samples of composition relevant to the lunar surface: pyroxenes, olivine, plagioclase feldspars and oxides. The Raman spectra were analysed in the context of their compositional and structural properties to develop robust correlations to enable their detection on the lunar surface by Raman spectroscopy. We developed and implemented a spectral deconvolution program to model the fluorescence background and various Raman peaks to extract their positions in wavenumber space. Relations were developed between the Raman peak positions of pyroxenes around 325, 670 and 1000 cm−1 with their compositions in terms of enstatite, ferrosilite and wollastonite components. For olivines, we verified previously determined correlations between the positions of the olivine‐related peak doublet between 800 and 880 cm−1 with forsterite content. We also discuss the main signatures detected in the Raman spectra of plagioclases and oxides. The derived relationships were examined using Raman spectra of the matrix and several inclusions of the lunar meteorite NWA12593. We were able to identify the main endmembers of the selected surface spots as pyroxenes, plagioclase feldspars and olivine. We used the previous correlations to separate orthopyroxene from clinopyroxene signatures and to propose a composition of the inclusions of the meteorite. The results of this study demonstrate the utility of Raman spectroscopy for determining the mineralogy of the lunar surface.

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Spectral properties of lunar impact melt deposits from Moon Mineralogy Mapper (M3) data

Cited by 11 publications

References 55 publications

New Insights into Aristarchus Crater with LRO LAMP Far-ultraviolet Observations

New Insights into Aristarchus Crater with LRO LAMP Far-ultraviolet Observations

A comparative study on continuum removal for Chang’E-4 VNIS hyperspectral data and its impact on elements retrieval

A Raman spectroscopy–compositional–structural investigation of lunar surface materials and analogues

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