Jardfeingi
Leita
Geology
Projects
Revised Stratigraphy for the Faroe Islands
Landslides
Law of the sea
Boreholes on Nólsoy
New mapping technique used on Faroese basalt
Geological Map & Memoir
Volcanic centres
Sornfelli meteorological station
Structural Geology SW of the Faroe Islands
Palaeomagnetic data; a sub basalt imaging tool?
Resistivity project on Suðuroy
Conferences
Archives
Geological localities
Links
A new mapping technique will be used on Faroese basalt


Three students from Durham University will over the summer and the following two summers utilise new mapping techniques to acquire three dimensional pictures of some of the geological outcrops on the Faroe Islands.

The three students, Jógvan Hansen, Richard Walker and Catherine Nelson will use the technique for different purposes, Jógvan Hansen for mapping structures within the sills and building 3D computer models to better understand the nature of these sills. Richard Walker will look at the fractures and fracture patterns in the basalt and Catherine Nelson will look at thickness variations and volume estimates and compare her results with offshore seismic data, all important issues in terms of understanding the geological history ofthe Faroe Islands but also helpful in better understanding the potential and implications for hydrocarbon exploration below the basalts.


Catherine and Richard scanning a cliff face in Gjógv. Jógvan is out mapping sills on Streymoy

The technique utilises a laser scanner that fires a low energy laser beam at the outcrop and the travel time of the reflected light is used to calculate the distance to the point of reflection on the outcrop. Using azimuth and inclination of the laser beam, additional software calculates the xyz-coordinate information of each scanpoint. The instrument can capture up to 8000 data points per second. This process is repeated to build a high resolution DTM (DTM, Digital Terrain Model) of the outcrop.

A digital SLR camera on top of the laser scanner acquires a photograph of the same scanned area, which in combination with the laser scandata forms a photo-realistic virtual outcrop that can be rotated in a 3D computer visionarium, providing the opportunity for the geologists to study the object from different angles when the geologist gets back to the office.

Since the data are on digital form, digital processing as pattern recognition can be used to acquire quantities for i.e. object dimension, fracture orientation and extent.

Simon Passey from Jarðfeingi is supervisor for Jógvan Hansen and Richard Walker.  
Skriva út Print
Themes
Projects, articles and presentations will be highlighted here.
Jarðfeingi will host a conference on basalt geology in August 2007.
Ment og forritað hava Sansir, sniðgivið hevur Uni Árting - Login