Transcript 4th period chemistry Dr.Buckner

MSIP Research
Presentation
Introduction
 Is there a relationship between the
length and width of cracks?
 Are cracks located next to craters?
We have noticed various cracks
that are on top of craters, along
edges of craters, and under
craters. Different physical features
such as length, width, and having
little “cracks” coming out the side
The longer the crack, the
wider the secondary cracks.
The shorter the crack, the
smaller the secondary cracks.
Background
Definitions

Fault
 A planar or gently curved fracture in the Earth's
crust across which there has been relative
displacement.
▪

http://www.geotech.org/survey/geotech/dictiona.html#sectF
Crack
 A break without complete separation of parts
 Fissure
▪
http://dictionary.reference.com/browse/crack?s=t

Faults can occur in any orientation and at any
angle to horizontal (remember that this angle
is known as the dip of the fault), but an active
fault's orientation and dip are not necessarily
random.

Fault properties are influenced by the
regional stress field created by tectonic
activity.
http://www.data.scec.org/Module/sec1pg21.html
Crater
Primary Crack
Secondary Crack
http://themis.asu.edu/zoom-20050225a
Crater
Primary Crack
Secondary Crack
http://themis.asu.edu/zoom-20030327a
Experimental
Design

Used the THEMIS camera system from
the Mars Odyssey Spacecraft
 Visible imagine system

Used THEMIS website to select images
of faults and cracks searching within a
set location

Used Targeting link to select a location
on Mars to image
http://themis.asu.edu

Used the JMARS Program to explore the
selected images

Recorded Latitude & Longitude

Record measurements
 Width of the crack
 At both ends
 At the center point
 At widest point
 At narrowest point
 Length of the crack

Add any additional information of interest
 Such as closeness of a crater
http://jmars.mars.asu.edu/downloads/jmars-msip.jnlp
Analysis Plan
Lat Long
38
219
32
244
26
138
25
24
Type of
Crater
Destroyed
Length Center Narrow
of Crack Width Width
Widest Top/Left Bottom/Right
Width End Width End Width
21.6
2.1
1.3
2.3
2.8
1.3
112.2
3.6
2.7
6.6
1.2
1.8
2.39
0.16
0.08
0.19
0.95
1.59
157
303
12.1
1.3
3.1
2.3
2.1
290
18.3
2.5
2.5
2.5
2.5
2.5
Preserved

The Average Crack Width was calculated by
averaging the following data items:
 Width at top/left end
 Width at bottom/right end
 Width at center
 Width at widest point
 Width at narrowest point
6
6
5
5
4
3
2
1
1
0
Preserved
Modified
Destroyed
http://mola.gsfc.nasa.gov/images/mercat_med.jpg
Conclusion
Are cracks located next to craters?
Investigated 46 cracks, only 12 were near a
crater.
About a fourth of the cracks that we
investigated were near some type of
crater.
According to our collected data, not all
cracks are located next to craters.
Initial Research Question: Is there a relationship
between the length & width of cracks?
Hypothesis: The longer the crack, the wider the
secondary cracks. The shorter the crack, the
smaller the secondary cracks.
Final Data Analysis: While the linear fit showed
a positive slope supporting the hypothesis, the r
value was low implying that there is insufficient
evidence to show a direct correlation.
Questions?