High crustal diversity preserved in the lunar meteorite Mount DeWitt 12007 (Victoria Land, Antarctica)

Collareta, Alberto; D’Orazio, Massimo; Gemelli, Maurizio; Pack, Andreas; Folco, Luigi

doi:10.1111/maps.12597

Cited by 21 publications

(36 citation statements)

References 40 publications

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“…; Collareta et al. ), NWA 7948 exhibits distinctive petrographic and mineralogical characteristics from these meteorites. Samples EET 96008, Y‐793274, and QUE 94281 do not contain the VLT basaltic clasts and volcanic glasses (Koeberl et al.…”

Section: Discussionmentioning

confidence: 87%

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Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust

Zeng

Joy

et al. 2018

Meteorit & Planetary Scien

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Abstract-This study presents the petrography, mineralogy, and bulk composition of lunar regolith breccia meteorite Northwest Africa (NWA) 7948. We identify a range of lunar lithologies including basaltic clasts (very low-titanium and low-titanium basalts), feldspathic lithologies (ferroan anorthosite, magnesian-suite rock, and alkali suite), granulites, impact melt breccias (including crystalline impact melt breccias, clast-bearing impact melt breccias, and glassy melt breccias), as well as regolith components (volcanic glass and impact glass). A compositionally unusual metal-rich clast was also identified, which may represent an impact melt lithology sourced from a unique Mg-suite parent rock. NWA 7948 has a mingled bulk rock composition (Al 2 O 3 = 21.6 wt% and FeO = 9.4 wt%) and relatively low concentrations of incompatible trace elements (e.g., Th = 1.07 ppm and Sm = 2.99 ppm) compared with Apollo regolith breccias. Comparing the bulk composition of the meteorite with remotely sensed geochemical data sets suggests that the sample was derived from a region of the lunar surface distal from the nearside Th-rich Procellarum KREEP Terrane. Our investigations suggest that it may have been ejected from a nearside highlands-mare boundary (e.g., around Mare Crisium or Orientale) or a cryptomare region (e.g., Schickard-Schiller or Mare smythii) or a farside highlands-mare boundary (e.g., Mare Australe, Apollo basin in the South PoleAitken basin). The distinctive mineralogical and geochemical features of NWA 7948 suggest that the meteorite may represent lunar material that has not been reported before, and indicate that the lunar highlands exhibit wide geological diversity.

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Section: Discussionmentioning

confidence: 87%

“…; Collareta et al. ). Average highland meteorite and high‐K KREEP are shown for comparison using the values of Warren () and Cahill et al.…”

Section: Resultsmentioning

confidence: 97%

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Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust

Zeng

Joy

et al. 2018

Meteorit & Planetary Scien

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“…Figure presents the chemical characteristics (i.e., (SiO 2 + FeO + MgO)/(SiO 2 + Al 2 O 3 + CaO) ratio vs. SCFM index) of a wide range of lunar pyroclastic glasses (sampled by Apollo 11, 12, 14, 15, and 17 missions), impact mare glasses, and impact highland glasses from Apollo‐returned samples and the randomly ejected lunar breccia meteorites (e.g., Collareta et al, ; Delano, ; Mercer et al, ; Norman et al, ; Wieczorek et al, ; Wittmann et al, ; Zeigler et al, ). It is clear that the pyroclastic glasses have lower SCFM index and higher (SiO 2 + FeO + MgO)/(SiO 2 + Al 2 O 3 + CaO) ratios, compared with impact‐generated mare and highland glasses (Figure ).…”

Section: Discussionmentioning

confidence: 99%

Micro‐FTIR Spectroscopy of Lunar Pyroclastic and Impact Glasses as a New Diagnostic Tool to Discern Them

Zeng

Martín

et al. 2019

JGR Planets

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Lunar glasses are characterized by complex origin (i.e., volcanism or impact), compositional diversity (e.g., picritic, basaltic, or feldspathic), and visible/near‐infrared spectra similarity. This makes it is problematic to distinguish different types of lunar glasses in laboratory and remote data. In this study, we present micro‐FTIR (Fourier Transform Infrared) spectroscopy spectra (550–1450 cm–1) of a suite of lunar volcanic origin glasses (i.e., pyroclastic glasses) and impact‐generated glasses (i.e., mare and highland impact glasses), identified in lunar breccia meteorite Northwest Africa 7948. The results show that lunar pyroclastic glasses, mare impact glasses, and highland impact glasses exhibit different FTIR spectral characteristics: (1) the Christiansen Feature positions of pyroclastic glasses are generally at a longer wavelength (i.e., >~8.3 μm equivalent to <~1,205 cm–1) than the spectra of mare and highland impact‐generated glasses (i.e., <~8.3 μm equivalent to >~1,205 cm–1); (2) a relatively strong minor peak was distinctly observed at longer wavelength (~13.5–16.5 μm equivalent to ~600–750 cm–1) for highland impact glasses. Therefore, new supplementary FTIR diagnostic criteria were proposed to discern different types of lunar glasses. Our studies demonstrated that midinfrared spectra could provide an effective tool to non‐destructively and quickly distinguish lunar glasses in laboratory (e.g., for the future Chang'E‐5 returned soils).

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“…, , Collareta et al . ). The compositional ranges for chondritic meteorites are also shown for comparison.…”

Section: Discussionmentioning

confidence: 97%

Parentage Identification of Differentiated Achondritic Meteorites by Hand‐held Energy Dispersive X‐Ray Fluorescence Spectrometry

Gemelli

Rocco

Folco

et al. 2017

Geostandard Geoanalytic Res

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We evaluate the potential of a hand-held energy dispersive XRF spectrometer for the preliminary classification of non-chondritic differentiated meteorites. The studied achondrites include nine lunar meteorites, seventeen Martian meteorites, five angrites and eighteen meteorites from asteroid 4 Vesta. Analytical precision and accuracy was tested on thirty-nine terrestrial igneous rock slabs with a wide range of composition. Replicate analyses, performed on the studied meteorites, show that Fe/Mn values together with Si and Ca/K ratio can be used in the discrimination of different achondrite groups. Fusion crust's Fe/Mn values of meteorites from Vesta and Mars are indistinguishable from those of the interior implying that even measurements on the fusion-crusted external surface could be sufficient to pigeonhole non-chondritic meteorites. Hand-held energy dispersive XRF spectrometer is a non-destructive but very effective technique for preliminary classification of achondrites in the field and in laboratory and for the identification of mislabelled meteorites in museum collections

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High crustal diversity preserved in the lunar meteorite Mount DeWitt 12007 (Victoria Land, Antarctica)

Cited by 21 publications

References 40 publications

Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust

Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust

Micro‐FTIR Spectroscopy of Lunar Pyroclastic and Impact Glasses as a New Diagnostic Tool to Discern Them

Parentage Identification of Differentiated Achondritic Meteorites by Hand‐held Energy Dispersive X‐Ray Fluorescence Spectrometry

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