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Thirty-First Annual Summer Intern Conference Papers Presented at the Thirty-First Annual Summer Intern Conference August 6, 2015 Houston, Texas 2015 Summer Intern Program for Undergraduates Lunar and Planetary Institute Sponsored by Lunar and Planetary Institute NASA Johnson Space Center LPI Contribution No. 1859 Compiled in 2015 by Meeting and Publication Services Lunar and Planetary Institute USRA Houston 3600 Bay Area Boulevard, Houston TX 77058-1113 The Lunar and Planetary Institute is operated by the Universities Space Research Association under a cooperative agreement with the Science Mission Directorate of the National Aeronautics and Space Administration. Any opinions, findings, and conclusions or recommendations expressed in this volume are those of the author(s) and do not necessarily reflect the views of the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication of any paper or portion thereof requires the written permission of the authors as well as the appropriate acknowledgment of this publication. HIGHLIGHTS Special Activities Date Activity Location June 1 Lunar Curatorial and Stardust Lab Tour NASA JSC June 11 USRA Family BBQ Picnic USRA/LPI July 9 Meteorite Lab Tour NASA JSC July 16 Human Exploration Research Analog (HERA)/Morpheus NASA JSC July 17 LPI Science Staff Research Presentations USRA/LPI July 20 Annual Safety Training USRA/LPI LPI Summer Intern Program 2015 — Brown Bag Seminars Wednesdays, 12:00 noon–1:00 p.m., USRA/LPI Date Speaker Topic Location June 3 Paul Schenk Dwarf Planets Hess Conference Room June 10 Donn Liddle Virtual Extraterrestrial Samples Hess Conference Room June 17 Justin Simon Protoplanetary Disk Hess Conference Room June 24 David Kring Future Lunar Missions Hess Conference Room July 1 LPI Interns Mid-Term Intern Reports Hess Conference Room July 7 Don Pettit Living and Working in Space Lecture Hall July 8 Walter Kiefer Planetary Interiors Hess Conference Room July 15 Buck Sharpton Impact Cratering Hess Conference Room July 22 Steve Clifford Water on Mars Hess Conference Room July 29 Aaron Burton Meteorite Organics Hess Conference Room August 6 Andy Shaner Education and Public Outreach Hess Conference Room LPI Summer Intern Tag Up and Science Fiction Film Series Thursdays, 6:30 p.m., USRA/LPI Date Title Location June 11 Sunshine Hess Conference Room June 16 When Worlds Collide Hess Conference Room June 18 Forbidden Planet Hess Conference Room June 23 Dark City Hess Conference Room June 25 The Core Hess Conference Room July 2 Close Encounters of the Third Kind Hess Conference Room July 9 Fish Story Hess Conference Room AGENDA 8:00 a.m. BREAKFAST 8:25 a.m. Introductory Remarks by Drs. Stephen Mackwell, Paul Spudis, and David Draper 8:30 a.m. TIMOTHY CAO, University of California, Merced (Advisors: Aaron Burton and Keiko Nakamura-Messenger) Nanometer and Milligram Scale Analyses of Organics in CR Chondrites [#4007] 8:50 a.m. CHRISTOPHER DONALDSON, University of Colorado Boulder (Advisor: Paul Niles) Ultra-Low Temperature Acid Alteration of Silicates [#4009] 9:10 a.m. ROBERT TREVOR GOLDMAN, Pomona College (Advisor: Walter Kiefer) Constraining Lunar Thermal Evolution with Gravity Models of Elastic Flexure of Impact Basin Rim Topography [#4008] 9:30 a.m. MYA ANN HABERMANN, University of Georgia (Advisors: Asmaa Boujibar, Kevin Righter, and Lisa Danielson) Partitioning of U, Th, and K Between Silicate and Metal Under Reducing Conditions: Implications for Mercury’s Differentiation [#4003] 9:50 a.m. JESSICA MARIE JOHNSON, Central Connecticut State University (Advisors: Mike Zolensky and David Kring) A Mineralogic and Petrographic Investigation of Unique Foreign Clasts in 3 Ordinary Chondrite Samples [#4004] 10:10 a.m. ELEANOR CARMEN MCINTOSH, University of South Carolina (Advisors: Jennifer Rapp and Dave Draper) Rare Earth Element Partitioning in Lunar Minerals: An Experimental Study [#4012] 10:30 a.m. BREAK 10:40 a.m. ALEXANDRA BOBIAK NAGURNEY, Lafayette College (Advisors: Allan Treiman and Paul Spudis) Petrology, Bulk Composition, and Provenance of Meteorite NWA5000 [#4002] 11:00 a.m. PATRICK RICHARD PHELPS, University of Tulsa (Advisor: David Kring) LL-Chondrite DOM-10092: A Shock-Metamorphosed Sample from an Impact-Modified Asteroid [#4010] 11:20 a.m. MALGORZATA URSZULA SLIZ, The University of Manchester (Advisor: Paul Spudis) Geology of the Deposits of the Lunar Crisium Basin [#4001] 11:40 a.m. JOANNA SZCZESZEK, Adam Mickiewicz University in Poznań (Advisors: Paul Byrne, Francesca Scipioni, Trudi Hoogenboom, and Paul Schenk) Characterizing Rayed Craters on Mercury and Ganymede [#4005] 12:00 p.m. CHRISTIAN TAI UDOVICIC, University of Toronto (Advisors: Georgiana Kramer and Erika Harnett) Lunar Swirls: Insights from Particle Tracking Simulations at Mare Marginis and NW of Apollo [#4011] 12:20 p.m. ALLISON VANCE, Beloit College (Advisors: Roy Christoffersen and Lindsay Keller) Evolution of Shock Melt Compositions in Lunar Regoliths [#4006] 12:40 p.m. LUNCH CONTENTS Nanometer and Milligram Scale Analyses of Organics in CR Chondrites T. D. Cao , K. Nakamura-Messenger , A. S. Burton , and E. L. Berger ................................. 1 Ultra-Low Temperature Acid Alteration of Silicates C. Donaldson and P. B. Niles ................................................................................................ 4 Constraining Lunar Thermal Evolution with Gravity Models of Elastic Flexure of Impact Basin Rim Topography R. T. Goldman and W. S. Kiefer ............................................................................................ 7 Partitioning of U, Th, and K Between Silicate and Metal Under Reducing Conditions: Implications for Mercury’s Differentiation M. Habermann , A. Boujibar , K. Righter , and L. Danielson ................................................ 10 A Mineralogic and Petrographic Investigation of Unique Foreign Clasts in 3 Ordinary Chondrite Samples J. M. Johnson , M. E. Zolensky , Q. Chan , and D. A. Kring .................................................. 13 Rare Earth Element Partitioning in Lunar Minerals: An Experimental Study E. C. McIntosh , J. F. Rapp , and D. S. Draper ...................................................................... 16 Petrology, Bulk Composition, and Provenance of Meteorite NWA5000 A. B. Nagurney , A. H. Treiman , and P. D. Spudis ................................................................ 19 LL-Chondrite DOM-10092: A Shock-Metamorphosed Sample from an Impact-Modified Asteroid P. R. Phelps and D. A. Kring ................................................................................................ 22 Geology of the Deposits of the Lunar Crisium Basin M. U. Sliz and P. D. Spudis ................................................................................................... 25 Characterizing Rayed Craters on Mercury and Ganymede J. Szczeszek , T. Hoogenboom , F. Scipioni , P. Schenk , K. Johnson , and P. Byrne ............. 28 Lunar Swirls: Insights from Particle Tracking Simulations at Mare Marginis and NW of Apollo C. J. Tai Udovicic , G. Y. Kramer , and E. M. Harnett ........................................................... 31 Evolution of Shock Melt Compositions in Lunar Regoliths A. M. Vance , R. Christoffersen , and L. P. Keller .................................................................. 34 31st Annual Summer Intern Conference (2015) 1 NANOMETER AND MILLIGRAM SCALE ANALYSES OF ORGANICS IN CR CHONDRITES T. D. Cao1, K. Nakamura-Messenger2, A. S. Burton2, E. L. Berger3 1University of California, Merced, CA, tcao6@uc- merced.edu, 2Astromaterials Research and Exploration Science Division, NASA Johnson Space Center, Houston, TX, 3GeoControl Systems Inc – Jacobs JETS contract, NASA Johnson Space Center, Houston, TX, USA Introduction: Primitive carbonaceous chondrites con- minimal aqueous alteration [3]. There have been no or- tain a wide range of organic material, ranging from sol- ganic studies reported in the literature for these speci- uble discrete molecules to insoluble nanoglobules of mens. They have relatively large available masses of macromolecular carbon. The relationship between the ~130 g (MIL 090657, 19) and ~485 g (BUC 10933, 11), soluble organic molecules, macromolecular organic ma- making sufficient masses available for soluble organic terial, and host minerals are poorly understood. Due to extraction. We acquired total mass of 1 g for each me- the differences in extractability of soluble and insoluble teorite sample in our study. organic materials, analysis methods for each differ from Sample Preparation and Analysis Method: each other and are often performed independently. The Insoluble Organic Material Study: To prepare samples combination of soluble and insoluble analyses can pro- for both SEM and TEM analyses, fine grained dark frag- vide a wider understanding on spatial distribution, and ments (50 – 100 µm) were carefully selected from each elemental, structural and isotopic composition of or- of the two specimen’s matrices under a stereomicro- ganic material in primitive meteorites. Furthermore, scope. Matrix fragments were then embedded in low- they can provide wider perspective on how extraterres- viscosity epoxy resins. Thin sections of 70-100 nm- trial organic materials potentially contributed to the syn- thickness were prepared using ultramicrotomy and de- thesis of life’s essential compounds such as amino acids, posited on TEM grids. Bright and dark-field imaging sugar acids, activated
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