Structural Geology on a Personal Computer
by Ze'ev Reches and others
Quantitative Analysis in Structural Geology
It is free for research and teaching; usage is expected to be acknowledged in resulting publications.
SoftStructure programs are organized in the groups listed below.
GENERAL:
MOHR-Calculating and plotting of Mohr diagrams for 2D and
3D
stress state.
SHEAR-Calculating stress components on fractures for 3D
stress
state and plotting on a stereonet the likelihood for slip or dilation
along
fractures.
STRAIN.XLS- Forward 2D strain analysis of finite strain
and
rigid body motion including plots of the deformed objects.
GeOrient- Plotting strereonets and rose diagrams; user
should
get the GeOrient program from its author: R.
Holocombe
GeoCalc- Calculating angular relations of lines and
planes;
user should get the GeoCalc program from its author: R.
Holocombe
DIRECT- Conversion between directional angles and
plunge/trend
of orienteddata.
FRY- Fry strain analysis of deformed grains (either field
data
or forward deformed data).
CALCTWIN-Dynamic analysis of calcite twins including
calculations
of angles and stereographic plots
SECTION-Plotting stratigraphic sections (by Gongquan
Chen,
U of Oklahoma, Norman, OK)
ANIMATE:
SIMQUAKE- Simulation of time, position and magnitude of
earthquakes
along a fault surface with nonuniform strength.
FOLD/FAULT:
FOLTING-1 Stress, strain and displacement distributions
within
a multi layer subjected to basement faulting.
FOLTING-2 As FOLTING-1 with plotting of tensile stresses.
STRESS FIELDS:
CRACK-Calculating and mapping the stress field of mode I /
mode
II fracture(2D).
ESHELBY-Stresses within a rigid or a soft 3D inclusion
embedded
in an infinite medium.
OVERTHRUST BLOCK-Stress field within an overthrust block;
a
2D solution for Hubbert and Rubey problem.
DIS3D-Deformation due to dislocations in 3D elastic
half-space
(by L. Ericson, Stanford
Univ., CAL)
PLOTDIS-Plotting stress and displacement maps of DIS3D
results.
STRENGTH- Strength distribution in a four-layered
lithosphere
(brittle/ductilealterations).
FAULTING ANALYSIS:
GROWTH-Animation of fault growth inside a Westerly granite
sample
by using recorded locations of acoustic emission events.
PROCESS-Same as GROWTH with emphasis on fault process
zone.
FAULTING IN 3D-Clacualtion and plotting of the expected
faults
and slip axes under 3D strain field.
STRESS-Stress inversion of fault slip data and/or
focal-plane
solutions to determine paleostresses and/or in-situ stresses.
RETILT- CONVERT- FLT2FCL- Service programs to STRESS
CLASS:
Suggested syllabus for a class titled: "Structural Geology on
a Personal Computer" including a series of 13 assignments.
BASICODE:
Source codes of most programs written in QuickBasic 4.0
(ASCII
format).
HELPFILE:
Background files and manuals for the main programs of
SoftStructure.
Files appear in WRITE 3.0 / WordPad format (WRITE / WordPad are the
wordprocessor
of WINDOWS).
Getting or Upgrading SoftStructure (it's free for
research
and teaching)
Current Version: 1.6, May, 2000 (WIN95/98), approximately 2.5
Mb
You should download one, self extracting file for win95/98: SoftStructure_zip.exe
Download, unzip and run 'setup.bat'
Or, one can also get SoftStructure as follows (lower case: your input, upper case: computer prompt):
ftp earth.es.huji.ac.il
USERNAME anonymous
PASSWORD (enter your FULL username including computer name, e.g.,
reches@earth.es.huji.ac.il)
cd pub/softstructure/
binary
get SoftStructure_zip.exe
quit
