PDS: The Planetary Atmospheres NodeJovian System Data Analysis Program
Cover 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: Jupiter Atmospheres |
| Major Equipment Proposal? No |
| Do you intend to submit an Education/Public Outreach (E/PO) proposal? No |
| Proposal Title: |
| Geological Studies of the Galilean Satellites |
| Abbreviated Proposal Title: |
| Galilean Satellite Geology |
| Principal Investigator: |
| Dr. Ronald
Greeley Dept. of Geology Arizona State U. Box 871404 Tempe, AZ 85287-1404 Phone: 602-965-7045 Fax: 602-965-8102 E-mail: greeley@asu.edu |
| Signature | Date |
| _____________________________________ | ____________ |
| Co-Investigators and Collaborators: | |||
| Type | Name | Affiliation | |
| Sci Co-I | Dr. David A. Williams | Arizona State University | dwilliams@dione.la.asu.edu |
| Sci Collab | Dr. Sarah Fagents | Arizona State University | fagents@asu.edu |
| Sci Collab | Dr. Jeffrey Moore | NASA Ames Research Center | jmoore@ringside.arc.nasa.gov |
| Sci Collab | Dr. Paul Schenk | Lunar & Planetary Institute | schenk@lpi3.jsc.nasa.gov |
| Sci Collab | Dr. John Spencer | Lowell Observatory | spencer@lowell.edu |
| Sci Collab | Dr. Rosaly Lopes-Gautier | NASA JPL | rlopes@issac.jpl.nasa.gov |
| Sci Collab | Dr. Gary Hansen | University of Hawaii | ghansen@pgd.hawaii.edu |
| Sci Collab | Dr. Laszlo Keszthelyi | University of Arizona and University of Hawaii | lpk@pirl.lpl.arizona.edu |
Proposal Summary:
Objectives: to study aspects of the geology of Io, Europa, and Callisto; Task 1: investigation of the styles of volcanism associated with high-temperature hotspots on Io; Task 2: determination of the relationship between the geographic and temporal distribution of surface features on Europa and global models of tidal stress, non-synchronous rotation and crustal thickness; Task 3: determination of the importance of degradational processes on Callisto, and their role in overall surficial evolution. Approach: Task 1: We will analyze Galileo and Voyager data to determine the morphologies and compositions of volcanic deposits at high-T hotspots, and use these data in computer models to simulate the emplacement of volcanic materials. Model results and spacecraft data analyses will be compared to terrestrial analogs and field studies. Task 2: We will reconstruct parts of the geologic history of Europa through mapping of Galileo SSI pole-to-pole mosaics, and use geologic, compositional (NIMS) and thermal (PPR) evidence to test proposed global models of surface deformation. These models predict a specific surface evolution that should be recorded in the variation of lineament orientations and occurrence of cycles of surface disruption. Task 3: We will use geologic mapping to classify crater degradation based on morphology, latitude, hemisphere, and background material. The importance of various degradational processes will be assessed, and compared with theoretical predictions. Galileo SSI, NIMS, and Voyager data will be used to classify crater degradation states and to distinguish background units. Significance: Task 1: We will reevaluate the nature of Io volcanism to account high-temperature, possibly ultramafic material. Task 2: We will establish the variation in surface morphology on Europa, and support or disprove models of global stress. Task 3: We will identify the range of crater degradation on Callisto, and role of various degradational processes in its history.
