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GIS IN GEOLOGY
Lesson 7
Miloš Marjanović
GIS in Geophysical Exploration
1.
Geophysical deterministic modeling with GIS implementation for 2D
map models. Case study of Juan de Fuca oceanic ridge.
 Accent on coupling GIS with external packages for modeling/simulation
of complex systems
GIS in Geophysical Exploration
Computer Aided
Drawing (CAD)
Database
Management
Systems
(DBMS)
Image
Processing (IP)
Geographic
Information System
(GIS)
Artificial
Intelligence(AI)
Desktop
mapping
Desktop and
Web publishing
General
statistics
Spreadsheets
Contouring and
surface modeling
Geostatistics
GIS in Geophysical Exploration
1.
Geophysical deterministic modeling with GIS implementation for 2D
map models. Case study of Juan de Fuca oceanic ridge.
 Plate tectonics
 Earth’s structure
 Plates and plate’s boundaries
 Mid-oceanic ridges
 Geophysical methods
GIS in Geophysical Exploration
1.
Geophysical deterministic modeling with GIS implementation for 2D
map models. Case study of Juan de Fuca oceanic ridge.
 Detailed study on topography of Juan de Fuca ridge
 Case study
 Modeling process and GIS implementation
 Bathymetry
 Gravimetric methods (density distribution):
 Instruments (platform-born)
 Corrections
 Bouguer anomalies (Air-free, Mantle, Residual Mantle)
 Multichannel seismic methods (boundaries of layers)
 Relation of two methods
 Importance of data accuracy and the role of GIS
GIS in Geophysical Exploration
1.
Geophysical deterministic modeling with GIS implementation for 2D
map models. Case study of Juan de Fuca oceanic ridge.
 Results:
GIS in Geophysical Exploration
1.
Geophysical deterministic modeling with GIS implementation for 2D
map models. Case study of Juan de Fuca oceanic ridge.
 To wrap-up:
Models showed the thicker crust due to the enhanced melt supply (probably
due to presence of nearby hotspots), yet the southern orientated trend of
shallow magma chambers (per each segment, and the ridge as a whole),
which means warmer magma regime toward the south is to be explained.
One opinion is the northward migration of the entire ridge or accumulation
of subaxial flow at the traverse with Blanco fracture zone (southernmost
transversal fault line).
GIS in Geophysical Exploration

www.geomapapp.org