PDS: The Planetary Atmospheres NodeJovian System Data Analysis Program
Analysis ProgramCover Page/Proposal Summary
ROSS-99 NRA 99-OSS-01
Date Due: 5/5/99
|
This proposal shall be used and disclosed for evaluation purposes only, and a copy of this Government notice shall be applied to any reproduction or abstract thereof. Any authorized restrictive notices that the submitter places on this proposal shall also be strictly complied with. Disclosure of this proposal for any reason outside the Government evaluation purposes shall be made only to the extent authorized by the Government. |
| Proposal Type: New Proposal |
| Proposal Category: Satellites and Rings |
| Major Equipment Proposal? No |
| Do you intend to submit an Education/Public Outreach (E/PO) proposal? No |
| Proposal Title: |
| Cycloidal lineaments on Europa and the tidal/tectonic model |
| Abbreviated Proposal Title: |
| Cycloidal lineaments and tidal tectonics on Europa |
| Principal Investigator: |
| Dr. Richard
Greenberg Lunar & Planetary Lab. University of Arizona P.O. 210092 Tucson, AZ 85721-0092 Phone: 520-621-6940 Fax: 520-621-5133 E-mail: greenberg@lpl.arizona.edu |
| Signature | Date |
| _____________________________________ | ____________ |
| Co-Investigators and Collaborators: | |||
| Type | Name | Affiliation | |
| Sci Co-I | Dr. Paul E. Geissler | University of Arizona | geissler@pirl.lpl.arizona.edu |
| Sci Co-I | Dr. Gregory Vincent Hoppa | University of Arizona | hoppa@pirl.lpl.arizona.edu |
| Sci Co-I | Dr. Bruce Randall Tufts | University of Arizona | rtufts.pirl.lpl.arizona.edu |
Proposal Summary:
Many of the longest and most distinctive linear features on Europa have cycloidal geometries, as now explained by our model of diurnal tidal stress. GEM data reveal details of the diversity of the character of features that evolve from these cycloidal cracks, including wedge-shaped pull-apart bands, major strike-slip faults with pull-apart segments, simple double ridges, unmodified cracks, and dilational bands. These features will be mapped and incorporated into our stratigraphic study to determine the processes responsible for their evolution in various times and places, as well as their relationship to other kinds of terrain, including chaotic regions. The results will be interpreted in terms of implications of the existence of a liquid water ocean under the ice, and its role in surface geology. In addition chaotic terrain on Europa represents a type of resurfacing distinct from the variety of processes that have formed tectonic terrains. Chaotic resurfacing is not necessarily the most recent: We are finding evidence of a complex, interwoven history, involving dominance of chaotic or tectonic processes in various times and places based on GEM data. We will further test various models for chaos formation and we will quantify the evidence for the relationships between chaotic terrain and tectonic processes, in both time and space.
