Mare Basalt Petrogenesis—A Review of Experimental Studies

Kesson, S. E.; Lindsley, D. H.

doi:10.1002/9781118782118.ch13

Cited by 3 publications

(5 citation statements)

References 29 publications

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Section: Discussionmentioning

confidence: 99%

“…Previous experimental investigations have revealed that the stability of armalcolite is a function of Mg# value, abundances of minor elements (such as Al 3+ , Cr 3+ , and Ti 3+ ), oxygen fugacity, and pressure (Lindsley et al 1974;Kesson and Lindsley, 1975;Friel et al 1977). Higher concentrations of MgO, Al 2 O 3 , Cr 2 O 3 , and Ti 2 O 3 can stabilize armalcolite to lower temperatures (Lindsley et al 1974;Kesson and Lindsley 1975). At low pressures (e.g., near or less than 1 kbar), the breakdown This probably implies that the breakdown reaction of armalcolite is hampered by kinetics at temperatures of <800 o C, although that armalcolite is thermodynamically unstable below 950 o C. Therefore, we suspect that the breakdown of armalcolite to ilmenite and rutile should be complete above 800 o C. Increasing pressure also has a tendency of raising the breakdown temperature of armalcolite (Lindsley et al 1974;Friel et al 1977).…”

Section: Discussionmentioning

confidence: 99%

“…At lower temperatures, ferropseudobrookite becomes unstable and will break down into ilmenite and rutile (Lindsley 1991). Experiments studying the breakdown reaction of armalcolite into ilmenite and rutile have also been conducted to constrain the effects of major-and minor-elements, pressure, and oxygen fugacity on the stability of armalcolite (Lindsley et al 1974;Kesson and Lindsley 1975;Friel et al 1977). Various stability at different temperatures implies that armalcolite could play an important role to constrain the thermal evolution of its host rocks.…”

Section: Introductionmentioning

confidence: 99%

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Subsolidus breakdown of armalcolite: Constraints on thermal effects during shock lithification of lunar regolith

Du,

Zhang,

Chen

et al. 2024

American Mineralogist

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Shock lithification of regolith breccias is a ubiquitous process on the surfaces of airless planetary bodies and may induce thermal effects, including melting on regolith breccia minerals. However, potential thermal effects on lithic and mineral clasts in regolith breccias were seldom quantitatively constrained. Here, we report two types of micro-textures of armalcolite [(Mg,Fe 2+ )Ti 2 O 5 ] in an Mg-suite lithic clast from lunar regolith breccia meteorite Northwest Africa 8182. One type of armalcolite contains oriented fine-grained ilmenite grains; the other occurs as an aggregate of ilmenite, rutile, spinel, and loveringite. We propose that the two types of micro-textures formed through subsolidus breakdown of armalcolite by different processes. The formation of ilmenite inclusions in armalcolite is related to slow cooling after the solidification of its source rock; however, the ilmenite-rutile-spinel-loveringite aggregates probably formed during the shock lithification event of NWA 8182. The results indicate that the temperature at the margin of lithic clasts could be raised up to at least 600 o C during strong shock lithification of lunar regolith and has profound thermal effects on the mineralogical and isotopic behaviors of lithic and mineral fragments in lunar regolith breccias.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Subsolidus breakdown of armalcolite: Constraints on thermal effects during shock lithification of lunar regolith

Du,

Zhang,

Chen

et al. 2024

American Mineralogist

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“…These differences include: different radiogenic isotope initial ratios (Lugmair and Marti ; Tatsumoto et al. ; Nyquist and Shih ), different temperatures and pressures of multiple saturation (although this may be interpreted in several ways, e.g., Kesson and Lindsley ; Chen et al. ; Chen and Lindsley ; Longhi ), and the fact that trace element crystallization trends for VLT glasses do not intersect the compositional fields for VLT mare basalts (e.g., Shearer et al.…”

Section: Introductionmentioning

confidence: 99%

Petrology and provenance of a very‐low‐titanium picrite clast in lunar highland regolith breccia 15295

Sonzogni

Kramer

Treiman

2015

Meteorit & Planetary Scien

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Clast 100 in regolith breccia 15295 could be a key to resolving the relationship(s) between mare basalts and lunar picritic glasses. The clast is basaltic, with texture, mineralogy, mineral compositions, and calculated bulk composition suggesting that it crystallized in a thick lava flow or shallow intrusive body from a very‐low‐titanium (VLT) basaltic magma. The estimated bulk composition of clast 15295,100 is primitive (i.e., magnesian) compared to those of known VLT basalts, and is very close to those of VLT picritic green glasses, especially the Apollo 14 A green glass. From these similarities, we infer that clast 15295,100 is a crystalline product of a picritic magma similar to the Apollo 14 A glass. Clementine and M3 remotely sensed data of the lunar surface were used to find areas that have chemical compositions consistent with those of clast 15295,100, not only near the Apollo 15 site, but in a broad region surrounding the site. Two regions are consistent with clast's 15295,100 compositional data. The larger region is in southern Mare Imbrium, and a smaller region is in the eastern half of Sinus Aestuum. These locations should be considered as candidates for future missions focusing on sample science.

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“…(The projected curves for the breakdown of armalcolite (Kesson and Lindsley, 1975;Friel et al, 1977) intersect the solidus between 8 and 18 kb depending on the composition of the armalcolite).…”

Section: Preliminary Experiments Have Been Carried Out Between 1550°cmentioning

confidence: 99%

Phase relationships in the system picroilmentite-clinopyroxene-Cr2O3

International Kimberlite Conference Extended Abstracts: 1977

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Mare Basalt Petrogenesis—A Review of Experimental Studies

Cited by 3 publications

References 29 publications

Subsolidus breakdown of armalcolite: Constraints on thermal effects during shock lithification of lunar regolith

Subsolidus breakdown of armalcolite: Constraints on thermal effects during shock lithification of lunar regolith

Petrology and provenance of a very‐low‐titanium picrite clast in lunar highland regolith breccia 15295

Phase relationships in the system picroilmentite-clinopyroxene-Cr2O3

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