“New” lunar meteorites: Implications for composition of the global lunar surface, lunar crust, and the bulk Moon

Warren, P. H.

doi:10.1111/j.1945-5100.2005.tb00395.x

Cited by 142 publications

(157 citation statements)

References 111 publications

Supporting

Mentioning

139

Contrasting

Unclassified

Order By: Relevance

“…The highest value of n(Fe)/n(Al) exceeds that of dunite, a mantle rock, implying sampling of iron-rich core material (Hanghoj et al 2010). Figure 1 shows that the range of n(Fe)/n(Al) among extrasolar asteroids is even greater than the difference found between bulk Moon (Warren 2005) and bulk Mercury (Brown & Elkins-Tanton 2009), two solar system objects which are understood as having a small and large iron core, respectively.…”

Section: Evidence For Widespread Differentiationmentioning

confidence: 94%

²⁶ Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

Jura

Young

2013

ApJ

View full text Add to dashboard Cite

Recently acquired evidence shows that extrasolar asteroids exhibit over a factor of 100 variation in the iron to aluminum abundance ratio. This large range likely is a consequence of igneous differentiation that resulted from heating produced by radioactive decay of 26 Al with an abundance comparable to that in the solar system's protoplanetary disk at birth. If so, the conventional view that our solar system began with an unusually high amount of 26 Al should be discarded.

show abstract

Section: Evidence For Widespread Differentiationmentioning

confidence: 94%

²⁶ Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

Jura

Young

2013

ApJ

View full text Add to dashboard Cite

show abstract

“…But how representative of the entire lunar surface are these samples from specific landing sites? Based the geochemistry of lunar meteorites it is clear that there are significant gaps in the Apollo/Luna sample collection (Korotev et al 2003;Warren 2005;Warren et al 2005). The estimates of both the cumulative amounts of basin material and the depth of the megaregolith presented above in Figs.…”

Section: Implications For Apollo/luna Sample Datamentioning

confidence: 99%

The lunar‐wide effects of basin ejecta distribution on the early megaregolith

Petro

Pieters

2008

Meteorit & Planetary Scien

View full text Add to dashboard Cite

Abstract-The lunar surface is marked by at least 43 large and ancient impact basins, each of which ejected a large amount of material that modified the areas surrounding each basin. We present an analysis of the effects of basin formation on the entire lunar surface using a previously defined basin ejecta model. Our modeling includes several simplifying assumptions in order to quantify two aspects of basin formation across the entire lunar surface: 1) the cumulative amount of material distributed across the surface, and 2) the depth to which that basin material created a well-mixed megaregolith. We find that the asymmetric distribution of large basins across the Moon creates a considerable nearside-farside dichotomy in both the cumulative amount of basin ejecta and the depth of the megaregolith. Basins significantly modified a large portion of the nearside while the farside experienced relatively small degrees of basin modification following the formation of the large South Pole-Aitken basin. The regions of the Moon with differing degrees of modification by basins correspond to regions thought to contain geochemical signatures remnant of early lunar crustal processes, indicating that the degree of basin modification of the surface directly influenced the distribution of the geochemical terranes observed today. Additionally, the modification of the lunar surface by basins suggests that the provenance of lunar highland samples currently in research collections is not representative of the entire lunar crust. Identifying locations on the lunar surface with unique modification histories will aid in selecting locations for future sample collection.

show abstract

“…For the nominal case, we assume a present-day thorium concentration of 1 ppm and 25 ppb in the crust and in the mantle, respectively (e.g., Jolliff et al, 2000;Warren, 2005). The concentrations of uranium and potassium are calculated using a linear relation…”

mentioning

confidence: 99%

The relative timing of Lunar Magma Ocean solidification and the Late Heavy Bombardment inferred from highly degraded impact basin structures

Kamata

Sugita

Abe

et al. 2015

Icarus

View full text Add to dashboard Cite

The solidification of the Lunar Magma Ocean (LMO) and formation of impact basins are important events that took place on the early Moon. The relative timing of these events, however, is poorly constrained. The aim of this study is ing substantial viscous lateral flow in the crust. Recent geodetic measurements reveal that the lunar crust is thinner than previously estimated, indicating that an extremely high crustal temperature is required for lateral flow to occur. In this study, we calculate lunar thermal evolution and viscoelastic deformation of basins and investigate the thermal state at the time of basin formation using recent crustal thickness models. We find that a Moho temperature >1300-1400K at the time of basin formation is required for substantial viscous relaxation of topography to occur; the implied elastic thickness at the time of loading is <30 km. Such a high temperature can be maintained only for a short time (i.e., <50Myr for most conditions) after solidification of the LMO or after mantle overturn if it took place; relaxed impact basins forming ≥150 Myr later than LMO solidification are unlikely. This result is in conflict with an intensive Late Heavy Bombardment (LHB) model, which assumes that most impact basins were formed at ∼3.9 Ga, since it requires LMO solidification time extremely later than previous theoretical estimates. Either the LHB was moderate, or the majority of proposed early PN basins were not in fact formed by impacts.

show abstract

“New” lunar meteorites: Implications for composition of the global lunar surface, lunar crust, and the bulk Moon

Cited by 142 publications

References 111 publications

²⁶ Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

²⁶ Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

The lunar‐wide effects of basin ejecta distribution on the early megaregolith

The relative timing of Lunar Magma Ocean solidification and the Late Heavy Bombardment inferred from highly degraded impact basin structures

Contact Info

Product

Resources

About

“New” lunar meteorites: Implications for composition of the global lunar surface, lunar crust, and the bulk Moon

Cited by 142 publications

References 111 publications

26 Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

26 Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

The lunar‐wide effects of basin ejecta distribution on the early megaregolith

The relative timing of Lunar Magma Ocean solidification and the Late Heavy Bombardment inferred from highly degraded impact basin structures

Contact Info

Product

Resources

About

²⁶ Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL

²⁶ Al IN THE EARLY SOLAR SYSTEM: NOT SO UNUSUAL AFTER ALL