V6NIA.SV6NIAS '160C 6MISTR.Y: 1>rOertss,1>roeress, 1>ros-ptl)ts,1>ros-ptots, A~ New Mtssto""-SMtsstoll\.S Program and Abstract Volume A LUNAR AND Y;~ PLANETARY ii;;; INSTITUTE LPI Contribution No. 1470 February 26–27, 2009 • Houston, Texas Sponsors Lunar and Planetary Institute NASA Science Mission Directorate NASA Mars Exploration Program Conveners Allan Treiman Lunar and Planetary Institute Adriana Ocampo NASA Science Mission Directorate Ellen Stofan Proxemy, VEXAG Stephen Mackwell Lunar and Planetary Institute Scientific Organizing Committee Allan Treiman Lunar and Planetary Institute Linda Elkins-Tanton Massachusetts Institute of Technology George Hashimoto Kobe University Natasha Johnson NASA Goddard Space Flight Center Eric Essene University of Michigan Stephen Mackwell Lunar and Planetary Institute Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 1470 Compiled in 2009 by LUNAR AND PLANETARY INSTITUTE 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. Abstracts in this volume may be cited as Author A. B. (2009) Title of abstract. In Workshop on Venus Geochemistry: Progress, Prospects, and New Missions, p. XX. LPI Contribution No. 1470, 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] A limited number of copies are available for the cost of shipping and handling. Visit the LPI Online Store at https://www.lpi.usra.edu/store/products.cfm. ISSN No. 0161-5297 Preface This volume contains abstracts that have been accepted for presentation at the Workshop on Venus Geochemistry: Progress, Prospects, and New Missions, February 26–27, 2009, Houston, Texas. 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. Workshop on Venus Geochemistry: Progress, Prospects, and New Missions v Contents Program .........................................................................................................................................................................1 In-Situ Aerial Exploration of Venus by Balloon — Science Objectives and Mission Architecture K. H. Baines, S. K. Atreya, D. Crisp, J. L. Hall, V. V. Kerzhanovich, S. S. Lamaye, and K. Zahnle ...........................................................................................................................7 Geochemical Aspects of the Geological History of Venus A. T. Basilevsky and J. W. Head .....................................................................................................................8 The Role of Sulfur in Detecting Recent Climate Change on Venus M. A. Bullock and D. H. Grinspoon .............................................................................................................10 Venus Geochemical Analysis by Remote Raman — Laser Induced Breakdown Spectroscopy (Raman-LIBS) S. M. Clegg, J. E. Barefield, R. C. Wiens, C. R. Quick, S. K. Sharma, A. K. Misra, M. D. Dyar, M. C. McCanta, and L. Elkins-Tanton .....................................................................................12 Magmatism on Venus: Upside-Down Melting in Gravitational Instabilities and a Possible Analog in the Siberian Large Igneous Province L. T. Elkins-Tanton and S. E. Smrekar .........................................................................................................14 Magmatic Diversity on Venus: Constraints from Terrestrial Analog Experiments J. Filiberto ....................................................................................................................................................16 Tessera Terrain is a Fundamental Geochemical Target M. S. Gilmore ...............................................................................................................................................18 Magnetotelluric Sounding of the Interior of Venus R. E. Grimm and G. T. Delory ......................................................................................................................20 The History of Venus D. H. Grinspoon, M. A. Bullock, and J. W. Head .........................................................................................22 Is There a Genetic Association Between Ribbon Tessera Terrain and Shield Terrain, Venus? V. L. Hansen .................................................................................................................................................24 Geological Evidence for Petrogenetic Diversity on Venus: Implications for Future Exploration Strategies J. W. Head, M. A. Ivanov, and A. T. Basilevsky ...........................................................................................25 Facing the Heat — Obtaining Near Infrared Real Emissivity Spectra at Venus Surface Temperatures J. Helbert, A. Maturilli, and N. Müller .........................................................................................................27 An Analysis of the Nature of Tessera Materials on Venus M. A. Ivanov and J. W. Head ........................................................................................................................29 Core Formation on the Terrestrial Planets: Comparative Planetology of the Earth, Moon, Mars, Vesta, and Venus J. H. Jones ....................................................................................................................................................31 vi LPI Contribution No. 1470 Soviet Lander and Magellan Data Point Toward Earthlike Venus Geochemistry and Volcanology, With Some Differences, and Many Questions J. S. Kargel ...................................................................................................................................................33 Melting Venus: Potential Geochemical Diagnostics of Mantle Source Depth W. S. Kiefer and J. Filiberto .........................................................................................................................35 Surficial Deposits and Access to Materials with Known Geological Context on Venus M. A. Kreslavsky ...........................................................................................................................................37 Trace Gas Constituents of the Venus Mesosphere Measured by SPICAV/SOIR Onboard Venus Express A. Mahieux, V. Wilquet, R. Drummond, A. C. Vandaele, A. Fedorova, D. Belyaev, O. Korablev, and J. L. Bertaux .................................................................................................39 VENERA and VEGA Missions to Venus: Historical Highlights M. Ya. Marov ................................................................................................................................................40 Interactions of Mechanical Controls on Magma Emplacement with the Petrology of Volcanic Edifice-building Flows on Venus P. J. McGovern and J. Filiberto ...................................................................................................................41 Sulfur Behavior in Terrestrial Basaltic Magmas: Insights for the Behavior of Volcanic Sulfur on Venus P. J. Michael .................................................................................................................................................43 Thermal Structure in the Venusian Atmosphere: Diurnal and Annual Variations A. Migliorini, D. Grassi, G. Piccioni, P. Drossart, A. Cardesin-Moinelo, and the VIRTIS-VEX Team .......................................................................................44 Venus Surface Thermal Emission Observed by VIRTIS on Venus Express N. Mueller, J. Helbert, G. L. Hashimoto, C. C. C. Tsang, S. Erard, G. Piccioni, P. Drossart, and the VIRTIS-VEX Team ......................................................................................................45 Venus’ Bulk and Mantle Compositions: Are Venus and Earth Really Twins? A. H. Treiman ...............................................................................................................................................47 Basalt–Atmosphere Interaction on Venus: Preliminary Results on Weathering of Minerals and Bulk Rock A. H. Treiman and S. P. Schwenzer ..............................................................................................................49 Planetary Raman Spectroscopic Study for Understanding Venus Evolution History A. Wang ........................................................................................................................................................51 Atmospheric Constraints on Sulfur Reactions Fluxes at the Surface of Venus Y. L. Yung and M. C. Liang ..........................................................................................................................52