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### Homework1

Course: GLG 485, Fall 2008
School: ASU
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Word Count: 455

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485/GLG GLG/CHM 598 Meteorites and Cosmochemistry Spring 04 Homework package #1 Due in class 8 March 2004 1. Using the data tables found in the class web page (GLG485.asu.edu) to this homework calculate the bulk elemental abundances, normalized to 106 atoms of Si, for the following planetary bodies: the CI, CM, CO, CV, L, LL, H, EL, and EH chondritic meteorite parent asteroids, Mars, the Earth, and the Moon....

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485/GLG GLG/CHM 598 Meteorites and Cosmochemistry Spring 04 Homework package #1 Due in class 8 March 2004 1. Using the data tables found in the class web page (GLG485.asu.edu) to this homework calculate the bulk elemental abundances, normalized to 106 atoms of Si, for the following planetary bodies: the CI, CM, CO, CV, L, LL, H, EL, and EH chondritic meteorite parent asteroids, Mars, the Earth, and the Moon. Present your results in a series of graphs with atomic number on the x-axis and Sinormalized abundance on the y-axis. (Note: the units ppm and ppb refer to parts per million by weight and part per billion by weight, respectively, in these data tables) 2. Using the results of problem (1), normalize the bulk elemental abundances for each planetary body to the idealized solar system abundances of the elements (SSAE). Present your results in a series of graphs with atomic number on the xaxis and Si- and SSAE-normalized abundance on the y-axis. 3 . Identify the 20 most depleted elements for each planetary body. Provide hypotheses for the observed depletions based on each elements or group of elements general chemical properties. 4 . Identify the 20 most enriched elements for each planetary body. Provide hypotheses for the observed enrichments based on each elements or group of elements general chemical properties. 5. Of the 20 elements discussed in problem (3), identify one element that exhibits a large range of Si- and SSAE-normalized depletions among the planetary twelve bodies considered. Sort these bodies in the order from most-depleted in this element to least-depleted. Present your results as a graph with the individual parent bodies, sorted by this elemental depletion, on the x-axis and Si- and SSAEnormalized abundance on the y-axis. Provide a hypothesis to explain the observed range of depletions based on this elements general chemical properties. 6. Of the 20 elements discussed in problem (4), identify one element that exhibits a large range of Si- and SSAE-normalized enrichments among the twelve planetary bodies considered. Sort these bodies in the order from least-enriched in this element to most-enriched. Present your results as a graph with the individual parent bodies, sorted by this elemental enrichment, on the x-axis and Si- and SSAE-normalized abundance on the y-axis. Provide a hypothesis to explain the observ...

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