Formation of anorthosite on the Moon through magma ocean fractional crystallization
نویسندگان
چکیده
منابع مشابه
Nonfractional Crystallization of a Terrestrial Magma Ocean
It has been suggested that evolution of a terrestrial magma ocean does not unavoidably follow a fractional crystallization scenario. Convection is able to preclude differentiation until a sharp viscosity increase occurs near some critical crystal fraction. However, this kind of crystallization and its physical and chemical consequences have not been previously studied. •Ve consider an end-membe...
متن کاملMassive layer of pure anorthosite on the Moon
[1] We present a new global survey of the purest anorthosite (PAN) rock using the Spectral Profiler onboard Kaguya. We found that PAN rocks are widely distributed over the Moon, including the Feldspathic Highland Terrain and the south and north polar regions. All PAN sites are associated with huge impact structures with diameters larger than 100 km. Based on the global distributions of PAN and ...
متن کاملHeterogeneity in lunar anorthosite meteorites: implications for the lunar magma ocean model.
The lunar magma ocean model is a well-established theory of the early evolution of the Moon. By this model, the Moon was initially largely molten and the anorthositic crust that now covers much of the lunar surface directly crystallized from this enormous magma source. We are undertaking a study of the geochemical characteristics of anorthosites from lunar meteorites to test this model. Rare ea...
متن کاملExperimental Constraints on Composition of Lunar Magma Ocean from Physical Properties of Magma
Introduction: It has been widely accepted that the lunar anorthosite crust formed by floatation of anorthite in the magma ocean at the time of a giant impact of the Earth-Moon system formation. The positive Eu-anomaly in lunar anothosites and the absence of mafic components in the lunar crust that contain complementary negative Eu-anomalies can also be the evidence of formation of the anorthosi...
متن کاملCrystallization of a Lunar Magma Ocean: Preliminary Experimental Results
Introduction: Although the Lunar Magma Ocean (LMO) hypothesis has achieved wide acceptance in the lunar science community, it has never been fully tested experimentally. Presented here are the first results of equilibrium crystallization experiments using the Taylor Whole Moon (TWM) composition [1]. The first mafic cumulates in this LMO are dominated by forsteritic olivine, low-Ca pyroxene and,...
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ژورنال
عنوان ژورنال: Geoscience Frontiers
سال: 2017
ISSN: 1674-9871
DOI: 10.1016/j.gsf.2016.11.007