WORKSHOP ON NEW VIEWS OF THE MOON II: I I I UNDERSTANDING THE MOON THROUGH THE INTEGRATION OF DIVERSE DATASETS SEPTEMBER22--24, 1999 FLAGSTAFF_ ARIZONA WORKSHOP ON NEw VIEWSOFTar MOONIh UNDERSTANDING Tar MOON THROUGH Tar INTEGRATIONOF DIVERSEDATASETS Flagstaff, Arizona September 22-24, 1999 Conveners Lisa Gaddis and Charles K. Shearer Sponsored by Lunar and Planetary Institute Museum of Northern Arizona National Aeronautics and Space Administration U.S. Geological Survey, Flagstaff Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 980 Compiledin 1999by LUNAR AND PLANETARY INSTITUTE TheInstituteis operatedby the UniversitiesSpaceResearchAssociationunderContractNo. NASW- 4574with 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. Abstracts in this volume may be cited as Author A. B. and Author C. D. (1999) Title of Abstract. In Workshop on New Views of the Moon II: Understanding the Moon Throughout the Integration of Diverse Datasets. LPI Contribution No. 980, Lunar and Planetary Institute, Houston. This volume is distributed by ORDER DEPARTMENT Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113, USA Phone: 281-486-2172 Fax: 281-486-2186 E-mail: [email protected] Mail order requestors will be invoiced for the cost of shipping and handling. LPI Contribution No. 980 iii Preface This volume contains abstracts that have been accepted for presentation at the Workshop on New Views of the Moon II: Understanding the Moon Through the Integration of Diverse Datasets, September 22-24, 1999, in Flagstaff, Arizona. The workshop conveners are Lisa Gaddis (U.S. Geological Survey, Flagstaff) and Charles K. Shearer (University of New Mexico). Color versions of some of the images contained in this volume are available on the meeting Web site (http://cass.jsc.nasa.gov/meetings/moon99/ pdf/program.pdf). Logistics, administration, and publications support for this meeting were provided by the staff of the Publications and Program Services Department at the Lunar and Planetary Institute. LPI Contribution No. 980 V Contents Prospecting for Lunar Resources with Global Geochemical and Multispectral Data C. C. Allen ...................................................................................................................................... 1 Photometric Imaging of the Moon from the Robotic Lunar Observatory J. M. Anderson and H. H. Kieffer .................................................................................................. 2 The Lunar Crustal Thickness from Analysis of the Lunar Prospector Gravity and Clementine Topography Datasets S. Asmar, G. Schubert, A. Konopliv, and W. Moore ....................................................................... 3 Three Paradigms of Lunar Regolith Evolution A. Basu, D. S. McKay, and S. J. Wentworth ................................................................................... 4 Lunar Global Petrologic Variations D. B. J. Bussey, P D. Spudis, and J. J. GilIis ................................................................................. 5 Integration of the Ultraviolet-Visible Spectral Clementine Data and the Gamma-Ray Lunar Prospector Data: Preliminary Results Concerning FeO, TiO 2, and Th Abundances of the Lunar Surface at Global Scale S. D. Chevrel, P. C. Pinet, G. Barreau, Y. Daydou, G. Richard, S. Maurice, and W. C. Feldman ................................................................................................................................ 6 The Distribution of Titanium in Lunar Soils on the Basis of Sensor and In Situ Data Fusion P E. Clark and L. Evans ................................................................................................................ 7 Digital Elevation Models of the Lunar Surface A. C. Cook and M. S. Robinson ..................................................................................................... 8 Simulating the Formation of Lunar Floor-Fracture Craters Using Elastoviscoplastic Relaxation A. J. Dombard and J. J. Gillis ........................................................................................................ 10 Sample Return Mission to the South Pole Aitken Basin M. B. Duke, B. C. Clark, T. Gamber, P. G. Lucey, G. Ryder, and G. J. Taylor .............................. 11 Subpixel Detection of Pyroclastic Materials in Clementine Ultraviolet-Visible Data W. H. Farrand and L. R. Gaddis .................................................................................................... 12 Enhanced Hydrogen Abundances Near Both Lunar Poles W. C. FeIdman, S. Maurice, D. J. Lawrence, I. Getenay, R. C. Elphic, B. L. BarracIough, andA. B. Binder ............................................................................................................................. 14 Laser Argon40-Argon-39 Age Studies of Dar A1 Gani 262 Lunar Meteorite V A. Fernandes, R. Burgess, and G. Turner .................................................................................. 15 vi Workshop on New Views of the Moon II Progress Toward Characterization of Juvenile Materials in Lunar Pyroclastic Deposits L. R. Gaddis ................................ ,.................................................................................................. 16 Lateral and Vertical Heterogeneity of Thorium in the Procellarum KREEP Terrane: As Reflected in the Ejecta Deposits of Post-Imbrium Craters J. J. GiIlis and B. L. JoIliff ............................................................................................................. 18 The Optical Maturity of Ejecta from Large Rayed Craters: Preliminary Results and Implications J. A. Grier, A. S. McEwen, P. G. Lucey, M. Milazzo, and R. G. Strom ........................................... 19 The Lunar Imager/SpectroMeter for the SELENE Mission J. Haruyama, H. Otake, T. Matsunaga, and the LISM Working Group ......................................... 21 The Composition and Origin of Selected Lunar Crater Rays B. R. Hawke, D. T. Blewett, P. G. Lucey, C. A. Peterson, J. E Bell III, B. A. Campbell, and M. S. Robinson ........................................................................................................................ 22 Lunar Gruithuisen and Mairan Domes: Rheology and Mode of Emplacement J. IV..Head and L. Wilson ............................................................................................................... 23 A Multispectral Analysis of the Flamsteed Region of Oceanus Procellarum D. J. Heather, S. K. Dunkin, P. D. Spudis, and D. B. J. Bussey ..................................................... 24 Petrogenesis of Magnesian-Suite Troctolites and Norites P. C. Hess and E. M. Parmentier ................................................................................................... 26 Ages of Oceanus Procellarum Basalts and Other Nearside Mare Basalts H. Hiesinger and J. W. Head III ..................................................................................................... 27 High-Resolution Mapping of Lunar Crustal Magnetic Fields: Correlations with Albedo Markings of the Reiner Gamma Class L. L. Hood, A. Yingst, D. L. Mitchell, R. P. Lin, M. Acuna, and A. B. Binder ................................ 28 Solar-Wind-Implanted Volatiles in the Lunar Regolith J. R. Johnson, T. D. Swindle, and P. G. Lucey ............................................................................... 29 Thorium Enrichment Within the Procellarum KREEP Terrane: The Record in Surface Deposits and Significance for Thermal Evolution B. L. Jolliff, J. J. GiIlis, and L. A. Haskin ...................................................................................... 31 Space Weathering in the Fine Size Fractions of Lunar Soils: Soil Maturity Effects L. P. Keller, S. J. Wentworth, D. S. McKay, L. A. Taylor, C. Pieters, and R. V. Morris .................. 32 The Deepest Lunar SPA Basin and Its Unusual Infilling: Constraints Imposed by Angular Momentum Considerations 34 G. G. Kochemasov ......................................................................................................................... LPI Contribution No. 980 vii North-Polar Lunar Light Plains: Ages and Compositional Observations U. Koehler, J. W. Head III., G. Neukum, and U. Wolf .................................................................... 34 Lunar Meteorites and Implications for Compositional Remote Sensing of the Lunar Surface R. L. Korotev .................................................................................................................................. 36 Iron Abundances on the Moon as Seen by the Lunar Prospector Gamma-Ray Spectrometer D. J. Lawrence, W. C. Feldman, B. L. Barraclough, R. C. Elphic, S. Maurice, A. B. Binder, and P. G. Lucey ........................................................................................................ ,............................ 38 Discrimination Between Maturity and Composition from Integrated Clementine Ultraviolet-Visible and Near-Infrared Data S. Le Mou_lic, Y. Langevin, S. Erard, P. Pinet, Y. Daydou, and S. Chevrel ................................... 39 Topographic-Compositional Relationships Within South Pole Aitken Basin P. G. Lucey, J. Holtzmann, D. T. Blewett, G.