The physics and chemistry of solar nebula shock waves: Applications to chondrule formation

Persistent Link:
http://hdl.handle.net/10150/289875
Title:
The physics and chemistry of solar nebula shock waves: Applications to chondrule formation
Author:
Ciesla, Fred J.
Issue Date:
2003
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Chondrules are a major component of primitive meteorites and are thought to be among the first solids to have formed in the solar system. However, the circumstances around the formation of chondrules have remained a mystery for the 200 years that chondrules have been known to exist. In this work, a model is developed to show that shock waves in the nebula could have been responsible for the complex thermal processing that chondrules are thought to have experienced. By studying different sizes of shock waves, it is shown that for shock waves to have been the dominant chondrule producing mechanism in the nebula, the shocks would have to be large (>1000 km) in size. Such shocks may be linked to the formation or evolution of Jupiter within the solar nebula. In addition, the thermal evolution of chondrules by shock waves can explain the geometric properties of compound chondrules if these objects formed by the collisions of molten chondrules. Finally, for the first time, the case of a shock wave passing through an icy region of the solar nebula is studied. It is found that such a situation may have produced conditions that would allow silicates to be hydrated on very short time scales, explaining the presence of phyllosilicates in the accretionary rims around chondrules in CM chondrites.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Physics, Astronomy and Astrophysics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Planetary Sciences
Degree Grantor:
University of Arizona
Advisor:
Hood, Lon L.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleThe physics and chemistry of solar nebula shock waves: Applications to chondrule formationen_US
dc.creatorCiesla, Fred J.en_US
dc.contributor.authorCiesla, Fred J.en_US
dc.date.issued2003en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractChondrules are a major component of primitive meteorites and are thought to be among the first solids to have formed in the solar system. However, the circumstances around the formation of chondrules have remained a mystery for the 200 years that chondrules have been known to exist. In this work, a model is developed to show that shock waves in the nebula could have been responsible for the complex thermal processing that chondrules are thought to have experienced. By studying different sizes of shock waves, it is shown that for shock waves to have been the dominant chondrule producing mechanism in the nebula, the shocks would have to be large (>1000 km) in size. Such shocks may be linked to the formation or evolution of Jupiter within the solar nebula. In addition, the thermal evolution of chondrules by shock waves can explain the geometric properties of compound chondrules if these objects formed by the collisions of molten chondrules. Finally, for the first time, the case of a shock wave passing through an icy region of the solar nebula is studied. It is found that such a situation may have produced conditions that would allow silicates to be hydrated on very short time scales, explaining the presence of phyllosilicates in the accretionary rims around chondrules in CM chondrites.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectPhysics, Astronomy and Astrophysics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplinePlanetary Sciencesen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorHood, Lon L.en_US
dc.identifier.proquest3089936en_US
dc.identifier.bibrecord.b44419843en_US
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