Trace element study of H chondrites: Evidence for meteoroid streams
Multivariate statistical analyses, both linear discriminant analysis and logistic regression, of the volatile trace elemental concentrations in H4-6 chondrites reveal compositionally distinguishable subpopulations. Observed difference in volatile trace element composition between Antarctic and non-A...
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ftpurdueuniv:oai:docs.lib.purdue.edu:dissertations-31245 2023-07-02T03:29:53+02:00 Trace element study of H chondrites: Evidence for meteoroid streams Wolf, Stephen Frederic Lipschutz, Michael E. 1993-01-01T08:00:00Z https://docs.lib.purdue.edu/dissertations/AAI9334441 ENG eng Purdue University https://docs.lib.purdue.edu/dissertations/AAI9334441 Theses and Dissertations Available from ProQuest Analytical chemistry|Astronomy|Astrophysics|Statistics text 1993 ftpurdueuniv 2023-06-12T21:25:20Z Multivariate statistical analyses, both linear discriminant analysis and logistic regression, of the volatile trace elemental concentrations in H4-6 chondrites reveal compositionally distinguishable subpopulations. Observed difference in volatile trace element composition between Antarctic and non-Antarctic H4-6 chondrites (Lipschutz and Samuels, 1991) can be explained by a compositionaily distinct subpopulation found in Victoria Land, Antarctica. This population of H4-6 chondrites is compositionally distinct from non-Antarctic H4-6 chondrites and from Antarctic H4-6 chondrites from Queen Maud Land. Comparisons of Queen Maud Land H4-6 chondrites with non-Antarctic H4-6 chondrites do not give reason to believe that these two populations are distinguishable from each other on the basis of the ten volatile trace element concentrations measured. ANOVA indicates that these differences are not the result of trivial causes such as weathering and analytical bias. Thermoluminescence properties of these populations parallels the results of volatile trace element comparisons. Given the differences in terrestrial age between Victoria Land, Queen Maud Land, and modern H4-6 chondrite falls, these results are consistent with a variation in H4-6 chondrite flux on a 300 ky timescale. This conclusion requires the existence of co-orbital meteoroid streams. Statistical analyses of the volatile trace elemental concentrations in non-Antarctic modern falls of H4-6 chondrites also demonstrate that a group of 13 H4-6 chondrites, Cluster 1, selected exclusively for their distinct fall parameters (Dodd, 1992) is compositionally distinguishable from a control group of 45 non-Antarctic modern H4-6 chondrites on the basis of the ten volatile trace element concentrations measured. Model-independent randomization-simulations based on both linear discriminant analysis and logistic regression verify these results. While ANOVA identifies two possible causes for this difference, analytical bias and group classification, a test validation ... Text Antarc* Antarctic Antarctica Queen Maud Land Victoria Land Purdue University: e-Pubs Antarctic Queen Maud Land ENVELOPE(12.000,12.000,-72.500,-72.500) Victoria Land |
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Purdue University: e-Pubs |
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English |
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Analytical chemistry|Astronomy|Astrophysics|Statistics |
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Analytical chemistry|Astronomy|Astrophysics|Statistics Wolf, Stephen Frederic Trace element study of H chondrites: Evidence for meteoroid streams |
topic_facet |
Analytical chemistry|Astronomy|Astrophysics|Statistics |
description |
Multivariate statistical analyses, both linear discriminant analysis and logistic regression, of the volatile trace elemental concentrations in H4-6 chondrites reveal compositionally distinguishable subpopulations. Observed difference in volatile trace element composition between Antarctic and non-Antarctic H4-6 chondrites (Lipschutz and Samuels, 1991) can be explained by a compositionaily distinct subpopulation found in Victoria Land, Antarctica. This population of H4-6 chondrites is compositionally distinct from non-Antarctic H4-6 chondrites and from Antarctic H4-6 chondrites from Queen Maud Land. Comparisons of Queen Maud Land H4-6 chondrites with non-Antarctic H4-6 chondrites do not give reason to believe that these two populations are distinguishable from each other on the basis of the ten volatile trace element concentrations measured. ANOVA indicates that these differences are not the result of trivial causes such as weathering and analytical bias. Thermoluminescence properties of these populations parallels the results of volatile trace element comparisons. Given the differences in terrestrial age between Victoria Land, Queen Maud Land, and modern H4-6 chondrite falls, these results are consistent with a variation in H4-6 chondrite flux on a 300 ky timescale. This conclusion requires the existence of co-orbital meteoroid streams. Statistical analyses of the volatile trace elemental concentrations in non-Antarctic modern falls of H4-6 chondrites also demonstrate that a group of 13 H4-6 chondrites, Cluster 1, selected exclusively for their distinct fall parameters (Dodd, 1992) is compositionally distinguishable from a control group of 45 non-Antarctic modern H4-6 chondrites on the basis of the ten volatile trace element concentrations measured. Model-independent randomization-simulations based on both linear discriminant analysis and logistic regression verify these results. While ANOVA identifies two possible causes for this difference, analytical bias and group classification, a test validation ... |
author2 |
Lipschutz, Michael E. |
format |
Text |
author |
Wolf, Stephen Frederic |
author_facet |
Wolf, Stephen Frederic |
author_sort |
Wolf, Stephen Frederic |
title |
Trace element study of H chondrites: Evidence for meteoroid streams |
title_short |
Trace element study of H chondrites: Evidence for meteoroid streams |
title_full |
Trace element study of H chondrites: Evidence for meteoroid streams |
title_fullStr |
Trace element study of H chondrites: Evidence for meteoroid streams |
title_full_unstemmed |
Trace element study of H chondrites: Evidence for meteoroid streams |
title_sort |
trace element study of h chondrites: evidence for meteoroid streams |
publisher |
Purdue University |
publishDate |
1993 |
url |
https://docs.lib.purdue.edu/dissertations/AAI9334441 |
long_lat |
ENVELOPE(12.000,12.000,-72.500,-72.500) |
geographic |
Antarctic Queen Maud Land Victoria Land |
geographic_facet |
Antarctic Queen Maud Land Victoria Land |
genre |
Antarc* Antarctic Antarctica Queen Maud Land Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Queen Maud Land Victoria Land |
op_source |
Theses and Dissertations Available from ProQuest |
op_relation |
https://docs.lib.purdue.edu/dissertations/AAI9334441 |
_version_ |
1770273204684718080 |