45th Lunar and Planetary Science Conference (2014) sess255.pdf

Tuesday, March 18, 2014 [T255] IMPACTS II: ANALYSES, EXPERIMENTS, AND FIELD STUDIES 1:30 p.m. Waterway Ballroom 6

Chairs: Robert Herrick Livio Tornabene

1:30 p.m. Osinski G. R. * The Fate of Carbonates During the Formation of the Ries Impact Structure, Germany [#2389] New evidence for the shock melting of carbonates during the formation of the Ries impact structure, Germany, is presented.

1:45 p.m. Thompson L. M. * Radial Distribution of Impact Damage at Manicouagan: Shock, Comminution and Shatter Cones [#2017] This work provides new insights into the distribution, associated microscopic shock, other damage effects, and formation mechanisms of shatter cones.

2:00 p.m. Tornabene L. L. * Osinski G. R. Greenberger R. N. Bishop J. L. Cloutis E. A. et al. The Pre-, Syn- and Post-Impact Origin of Hydrated Phases: A Case Study Based on the Remote Sensing and Ground-Truth at the Haughton Impact Structure, Nunavut, Canada [#2710] We assess the origin of hydrated phases associated with the Haughton impact structure based on remote sensing and ground-truth data from the field.

2:15 p.m. Ormö J. * Sturkell E. Alwmark C. Nõlvak J. Melero Asensio I. et al. Unique Example of an Impact of a Binary Asteroid in a Marine Target Environment: The Lockne-Målingen Doublet, Central Sweden [#1024] Of the few known putative doublets on Earth, the Lockne and Målingen craters are the first to be dated with enough precision to be considered unequivocal.

2:30 p.m. Wada K. * Arakawa M. Saiki T. Imamura H. Hayakawa M. et al. Large Scale Impact Experiments Simulating Small Carry-On Impactor (SCI) Equipped on Hayabusa-2 [#1768] We report results of the SCI experiment, launching a 2-kg copper liner at 2 km/s, which is a good chance to examine the scale dependence of crater formation.

2:45 p.m. Flynn G. J. * Durda D. D. Patmore E. B. Clayton A. N. Jack S. J. et al. Momentum Transfer in Impact Cratering of a Porous Target [#1950] We cratered pumice targets, ~0.5 g/cc, with ~4 km/s projectiles and found the momentum transfered by crater ejecta exceeded that from projectile capture.

3:00 p.m. Kurosawa K. * Nagaoka Y. Hasegawa S. Sugita S. Matsui T. Ultrafast Imaging Observations of the Impact Jetting During Oblique Impacts [#1856] We present the first systematic experimental dataset for the jet velocity as a function of impact velocity and the shock impedance of the target.

3:15 p.m. Hermalyn B. * Schultz P. H. Effects of Target Properties on Impact Ejecta Distributions: Time Resolved Experiments and Computational Benchmarking [#2791] We present novel data on the ejecta velocity distribution for vertical and oblique impacts into more realistic target materials.

45th Lunar and Planetary Science Conference (2014) sess255.pdf

3:30 p.m. Bruck Syal M. * Schultz P. H. Spatially-Resolved Spectroscopy of Impact-Generated Vapor Plumes [#2760] The evolving temperatures and compositions within impact-generated vapor plumes are characterized using high-speed spectroscopy at the NASA AVGR.

3:45 p.m. Zanetti M. * Stadermann A. Krüger T. van der Bogert C. Hiesinger H. et al. Mapping Crater Density Variation on Copernican Ejecta Blankets: Evidence for Auto-Secondary Cratering at Tycho and Aristarchus [#1528] Crater densities on continuous ejecta provide evidence for auto-secondary cratering with implications for both the cratering process and counting statistics.

4:00 p.m. Robbins S. J. * Hynek B. M. The Population of Secondary Impact Craters on Mars [#1666] Mars impact craters / Are multiple types that need / To be sep’rated.

4:15 p.m. Sharpton V. L. * Constraints on Crater Growth Mechanisms, Ejecta Thicknesses and Excavation Depths from Target Outcrops at Fresh Lunar Craters [#1176] Outcrops on lunar craters constrain excavation flow characteristics.

4:30 p.m. Herrick R. R. * Protobasins are Not Part of the Normal Sequence, Target is Important, and Other Musings on the Central-Peak to Peak-Ring Transition Based on Mercury’s Impact Craters [#1782] Summary of observations regarding impact craters on Mercury that are 100–140 km in diameter, in the transition between central-peak and peak-ring craters.