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Athena Rover

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Athena Rover – PowerPoint PPT presentation

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Title: Athena Rover


1
The Mission of the Mars Exploration Rovers
2
The Athena Science Payload
Remote Sensing Package Pancam Mast Assembly
(PMA) Pancam Mini-TES
Magnetic Properties Experiment
In-Situ Package Instrument Deployment Device
(IDD) Microscopic Imager Alpha Particle
X-Ray Spectrometer Mössbauer Spectrometer
Rock Abrasion Tool
3
Driving on Mars from National Air and Space
Museum
4
Landing in Gusev Crater
5
The View From the Surface
6
Adirondack
7
Normative Mineralogy from APXS
8
Mini-TES Mineralogy
9
On to the Columbia Hills
10
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11
The Hills are Alive
12
Tetl
13
Descartes
14
Examples of Rock Types of Husband Hill
High P
High Ti
Low Cr
Some Rock Types, including Voltaire Class are Not
Shown
15
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16
Rock Counts along Spirits traverse in Gusev
Counts categorized by geomorphic surface (sol
numbers labeled). White arrows indicate the
average azimuth (i.e. "look direction") of scene.
17
Size-Frequency Consistent Fragmentation
18
Difference Related to Minor Burial/Stripping
Local Burial by Drift
Stripping of 10s of cm
Larger and more numerous rocks on Bonneville
crater rim
19
Bedrock Influences Distribution on Husband Hill
Float Matches Ejecta Size Distribution, but shows
interesting compositional variability on Husband
Hill e.g., Backstay Rocks that may be
contributions from Pre-Plains Ejecta?
Voltaire Outcrops
View east towards the crest of Husband Hill
20
Dust Devils and Dust Removal
21
Home Plate
sol 776
22
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23
Home Plate
24
Bomb Sag In Coarser Lower Unit
25
Fine-Grained Upper Unit
26
Silica Valley
27
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28
Si
91 SiO2! (also enriched in Ti)
29
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30
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31
A Solar Eclipse
32
A Lunar Eclipse
33
Meridiani Planum
34
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35
Opportunity Ledge
36
Hematite Distribution
37
Spherical Granules (Blueberries)
38
MI on Stone Mountain
39
Spherule Distribution
Volume distribution is more uniform than random,
as expected for concretions
40
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41
Outcrop Chemistry 40 Sulfates
42
Mössbauer Mineralogy
2
2
43
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44
Current Ripples On Earth
Courtesy of Dave Rubin, USGS
45
Endurance Crater
46
The Trek Into Endurance
47
Chemical Changes With Depth
Depth
48
Geologic History
  • All rocks composed of sulfate-rich sandstone
  • Environment Sulfate-rich eolian deposits (dunes
    and sand sheets), and probable interdune playas
    fed by acidic groundwater.
  • Groundwater fluctuations led to dissolution of
    some minerals, and formation of concretions
  • Conditions were habitable, but could have posed
    significant challenges to life
  • Oxidizing
  • Acidic
  • Saline
  • Arid and only intermittently wet

49
Heading South.
50
Hello, Sponge Bob!
51
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52
North of Victoria Rock With No Berries
53
HiRISE Images Victoria
54
HiRISE Images Victoria
55
Cape Verde
Duck Bay
56
Opportunity
Cape Verde
Duck Bay
57
Opportunity
Cape Verde
Duck Bay
58
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59

60
Impact Breccia
Fractured In Place
Pre-Impact Surface
Bedrock
61
Cape St. Vincent
7-meter thick climbing eolian bedform
Paleo wind direction is north to south
62
Near Victoria Big Berries Galore!
63
Guadarrama
Madrid
1 m
64
Did We Traverse Up Section?
1. Layered Sediments Deposited
65
Did We Traverse Up Section?
2. Concretions Precipitated From Groundwater
66
Did We Traverse Up Section?
3. Water Drains
67
Did We Traverse Up Section?
4. Surface Planed Off By Eolian Erosion
68
Did We Traverse Up Section?
5. Victoria Crater Forms
69
Did We Traverse Up Section?
Landing Site
70
Did We Traverse Up Section?
Landing Site
No Berries
71
Did We Traverse Up Section?
Big Berries Again
Landing Site
No Berries
72
Did We Traverse Up Section?
Big Berries Again
Landing Site
No Berries
???
73
Eroded or Pristine? Primary or Secondary?
  • D/d ratio of 0.1
  • Serrated, low rim
  • Interior dune field
  • Eroded Primary, not Pristine Secondary

74
How Much Erosion?
  • Compare to pristine craters 500-700 m across
  • 500 m crater produces rim of all ejecta
  • 700 m crater produces rim of all uplift
  • 625-650 m crater produces expected rim, ejecta

75
What Processes of Erosion?
76
The roll of the Wind
Rounded Bays
  • Eolian Signatures Ubiquitous, Enable Mass
    Wasting of Capes
  • Dunes/Fill, Ventifacts, Narrow/Buried Talus,
    Rounded Forms

77
Victoria Crater Traverse (Sols 1382 to 1602)
Nevada
Sol 1559
Sol 1602
Sol 1562
Sol 1596
Sol 1582
Sol 1564
Sol 1563
Sol 1569
Sol 1559
Sol 1487
Sol 1565
Sol 1557
Sol 1491
Sol 1489
Sol 1548
Sol 1484
From Sol 1461
Sol 1402
Sol 1382
To Sol 1440
Sol 1438
Sol 1401
To Sol 1428
Sol 1418
Sol 1416
Sol 1415
OSU Mapping and GIS Laboratory
Image Sources NASA/Cornell University
78
1 m
79
Sol 1634 Navcam from the rim of Victoria
Out of Victoria on Sol 1634
80
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81
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