The Apollo 16 Mare Component : Petrography
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منابع مشابه
An Apollo 15 mare basalt fragment and lunar mare provinces
Lunar sample 15474,4 is a tiny fragment of olivine-augite vitrophyre that is a mare basalt. Although petrographically distinct from all other Apollo 15 samples, it has been ignored since its first brief description. Our new petrographic and mineral chemical data show that the olivines and pyroxenes are distinct from those in other basalts. The basalt cooled and solidified extremely rapidly; som...
متن کاملModeling the provenance of the Apollo 16 regolith
[1] The regolith at the Apollo 16 landing site, the only Apollo landing site in the central lunar highlands, contains material derived from a number of sources. A model that accounts for the introduction of basin ejecta and mixing of the megaregolith is used to estimate the abundance of basin material in the Apollo 16 regolith. Megaregolith mixing model estimates of the abundance of primary eje...
متن کاملLunar Volcanism in Space and Time
Lunar volcanic deposits are dominated by areally extensive mare units occurring in regionally low areas predominantly on the lunar near side. Data obtained from lunar orbit and earth-based observations have been used to extend the detailed characterizations derived from Apollo and Luna sample return missions to other parts of the moon. Mare volcanism occurred over a period of about 1.3 billion ...
متن کاملMare Basalt Fragments in Lunar Highlands Meteorites: Connecting Measured Ti Abundances with Orbital
Lunar highland meteorites contain small proportions of mare basalt fragments, which are important for defining lunar basalts in areas not visited by Apollo/Luna. We analyzed seven mare basalt fragments from three highland meteorites, and retrieved the Ti contents of their parent magmas from core pyroxene compositions. The analyzed clasts span the range of VLT and low-Ti, basalts in Apollo & Lun...
متن کاملA Study of Apollo 16 Feldspathic Glasses: Locally Produced or Ballistically Deposited?
Introduction: Continuous bombardment by aster-oidal and cometary debris over the last 4.5 Ga has churned the lunar surface into a fine-grained regolith. The violent nature of these impacts has largely destroyed the primordial lunar crust, reworking it into a variety of breccia and glass fragments that make up the majority of most Apollo soils. Nowhere is this more true than at the Apollo 16 sit...
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