GLG 416/598 Field Geophysics
Spring Term 1997
Taught by:
Professor James Tyburczy
Assistant Professor Ramón Arrowsmith
Jim Pfeiffer
GLG 416/598 Course documents
Introductory information
Course Schedule
GLG 416/598 Course Links
UTM to Lat-Long and vice versa conversion
City of Tempe Rio Salado Project
Specific tasks and data. Note that these are now in chronologic order
2_6_97 Gravity data
We had a problem with the spreadsheet:
"What happened is that on 1/30, Jim put the data into a spreadsheet in one
order (Northing, than Easting), then for 2/6 he revised the entire data
table, including the data for 1/30, to read Easting, then Northing.
Those of us (myself included) who worked on the 1/30 data, then cut and
pasted the new data from 2/6 into our working spreadsheets ended up with
the columns reversed. The current Excel file on IT (entitled Gravity
Data 2/6/97.txt) IS CORRECT."-- Jim T., 5:19 pm, 2/12/97
2_6_97 Gravity data (note that it is also on the IT site.
There are two
gravity files. One is an excel spreadsheet and the other is a text
version. The numers are the same.
2_13_97 Survey data (updates and includes 1_30_97 and 2_6_97 data):
Readme (Description of data processing)
Raw survey files from total stations:
file01.gsi
file02.gsi
file03.gsi
Modified raw files:
file01.raw
file02.raw
file03.raw
cleaned and concatenated raw file (fixed the coding and saving errors at
the beginning):
2_13_97.raw
Processed field file from LisCad (this one has the locations and
elevations in a readable format. Use it to start gravity processing):
2_13_97.fld
Graphics (note that the canvas file is in the instructor volume):
Local survey:
2_13_97.gif
This is the local survey overlain on the Tempe quadrangle map:
2_13_97gravoverlay.gif
2/18/97 general Gravity notes
Look on the IT server for the new terrain correction spreadsheet generated
by Jim T.
Print out and turn in the version of the spreadsheet for each gravity
point for which you do terrain corrections.
Computer access to the canvas files to do online terrain corrections is
accessible in the computer lab from the Powermac Performas in the back of
the room (using the IT server files), and on the two Dells in the front of
the room (not the third that is in the middle, it has no network access),
where you will find the files on the main c: drive in the filder called
Field Geophysics.
Get started early on your data analysis and on your papers!
2/21/97 Gravity terrain correction data
Look on the IT site also
Terrain Corr Wksht
2/27/97 Seismic reflection exercise map and receiver locations
See this for the location of the surveyed points. Note that point 3000 is
the first shot point, and the others span the receiver locations at 9 m
intervals.
seism.fld
Graphics (note that the canvas file is in the instructor volume in the
folder called 2_27_97 survey):
Local survey:
2_27_97.gif
This is the local survey overlain on the Tempe quadrangle map:
2_27_97overview.gif
3/7/97 Mathematica visualization note
Please use the file called USEMEvislite.m if you want to visualize the
bedrock surface based upon your analysis. YOU DO NOT HAVE TO REWRITE THE
CODE. You don't have to rewrite the Burger software or Deltagraph to use
it do you? I hope that you might find this to be useful and easy. Just
replace the one list called psuedoelevation with your bedrock interface
elevation data. Use the same format of brackets as I did. Make sure that
you move through the Mathematica notebook sequentially, building the
graphics and lists before getting to the end to visualize them. Feel free
to change anything you want. You cannot save back to the IT site, so just
save to somewhere else and then you can crank away.
Be sure to launch Mathematica 2.2 FIRST and then open the USEMEvislite.m
file. Otherwise, it seems that you will launch Mathematica 3.0 and that
has not been correctly installed yet.
THe best way to get your graphics out of the Mathematica document is to
print the entire notebook, or click on the one that you like, copy it,
open a new Mathematica notebook, paste your graphic. Then go to page
setup and choose landscape (sideways) mode for printing. Then in
Mathematica under the Style menu, choose show ruler. THen you should see a
little black arrow at about 9 inches for landscape printing. Pull the
edge of your graphic out until it is 9" wide. It will scale vertically
accordingly. Then print. That way, you will be able to get a nice big
plot. Try printing in greyscale on the printer in the H461 lab. It
should look ok.
To print in color from the two PowerPC performas in the back of the H461
lab. you may print on my research group printer in F475. Select the
Chooser from the apple menu, then click on the HP Laserjet Icon, then
select GLG PSF Zone, then F475 HP 1600CM. You should be in business. Ask
me or one of the students that works with me such as George Hilley, Sean
McManus, Sarah Robinson, or Steve Wood or maybe some of the others to let
you into that room to get your print outs.
3/6/97 Seismic refraction exercise map and receiver locations
See this for the location of the surveyed points. Note that point 3101 is
the first shot point, and the others span the receiver locations.
refract1.fld
Graphics (note that the canvas file is in the instructor volume in the
folder called 3_6_97 survey):
Local survey:
3_6_97.gif
This is the local survey overlain on the Tempe quadrangle map:
3_6_97overview.gif
3/13/97 THOR Seismic refraction exercise map and receiver locations
See this for the location of the surveyed points. Note that point 3200 is
the first hammer shot point, and the others span the receiver locations.
3205 is the 2nd hammer shot point and the 1st
Thor shot point and 3212 is the 2nd Thor shot point
thor.fld
Graphics (note that the canvas file is in the instructor volume in the
folder called Thor survey):
Local survey:
3_13_97.gif
This is the local survey overlain on the Tempe quadrangle map:
3_13_97overview.gif
4/17/97 Vertical Seismic Profiling and EM34 survey
Note the figures and data on the IT site. Below are the graphics:
Local survey:
4_17_97.gif
This is the local survey overlain on the Tempe quadrangle map:
4_17_97overview.gif
Field Geophysics links
Exploration Geophysics and Seismology
(GEL161 at UC Davis taught by Roland Burgmann)
National Geophysical Data Center