Impact splash chondrule formation during planetesimal recycling
نویسندگان
چکیده
منابع مشابه
Early Planetesimal Splashing: Reconciling Chondrule Formation with Disk
Disk evolution and chondrules: Historically it has often been tacitly supposed (e.g. [1]) that the protoplanetary disk evolved through four sequential stages: (1) production of CAIs and chondrules by the rapid (flash) melting of clumps of dust; (2) accretion of primitive planetesimals; (3) metamorphism and melting of those planetesimals; (4) collisional break-up of planetesimals and their aggre...
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Introduction: Nebular shock waves are considered among the leading candidates for forming chondrules [1-4] and are also capable of explaining the existence of other components of primitive meteorites [5]. While it has been shown that shock waves can explain the thermal processing of chondrules, the source of the shock waves is still debated. Among the candidates for producing chondrule-forming ...
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Studies of matrix in primitive chondrites provide our only detailed information about the fine fraction (diameter <2 μm) of solids in the solar nebula. A minor fraction of the fines, the presolar grains, offers information about the kinds of materials present in the molecular cloud that spawned the Solar System. Although some researchers have argued that chondritic matrix is relatively unaltere...
متن کاملA CONSTRAINT ON IMPACT THEORIES OF CHONDRULE FORMATION l
The association between agglutinates and chondrule-like spherules, which characterizes the assemblage of impactderived melt products in lunar regolith samples and some gas-rich achondrites, is not found in primitive chondrites. This observation suggests that impacts into a parent-body regolith are unlikely to have produced the chondrules. We believe that if chondrules were formed from impact me...
متن کاملExperimental Constraints on Chondrule Formation
Chondrule textures depend on the extent of melting of the chondrule precursor material when cooling starts. If viable nuclei remain in the melt, crystallization begins immediately, producing crystals with shapes that approach equilibrium. If not, crystallization does not occur until the melt is supersaturated, resulting in more rapid growth rates and the formation of skeletal or dendritic cryst...
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ژورنال
عنوان ژورنال: Icarus
سال: 2018
ISSN: 0019-1035
DOI: 10.1016/j.icarus.2017.11.004