GEOSCAN, résultats de la recherche


TitreInterpretive geology with structural constraints: an introduction to the SPARSE© plug-in
Auteurde Kemp, E; Sprague, K; Wong, W
SourceProceedings of the Americas GOCAD User Meeting; 2004, 16 pages
Séries alt.Secteur des sciences de la Terre, Contribution externe 2004173
ÉditeurMira Geoscience Limited |a Westmount, QC, Canada (Westmount, QC, Canada)
RéunionAmericas GOCAD User Meeting; Houston, TX; US; 2004
Mediaen ligne; numérique
Sujetsétablissement de modèles; établissement de modèles structuraux; interpretations structurelles; logiciel; cartographie par ordinateur; techniques de cartographie; applications par ordinateur; système d'information géographique; géomathématique; géologie structurale
Illustrationsphotographs; schematic diagrams; 3-D models; stereonets
ProgrammeLa mise en valeur des ressources du Nord
ProgrammeOntario Mineral Exploration Technologies (OMET) Program
Résumé(disponible en anglais seulement)
Earth Science decisions are based on a host of spatial, property and processed based conceptual constraining models. The iterative process of articulating spatial models in the form of 3-D maps, 2-D cross-sections or simulated property distributions that is becoming common to the geomodelling community needs to be optimized for standard structural data types. Structural data types such as planar and linear bedding and fabric orientations from drill-core and field surveys, constraining and interpretive 2-D map data, fold shape parameters, structural anisotropy, and form variance are all needed when making any traditional structural interpretation. Including all these structural data types in the geomodelling process is the goal of SPARSE ©. We present a range of tools for rapid prototyping of geologic surfaces by using Bézier and NURBS based forms that have simple manipulators for geologists to use directly. Examination by visual inspection through structural point data sets by an expert using these tools can quickly result in better characterization of large regional forms. Combining the 3-D symbolization of orientation data with rose diagrams, lower hemisphere structural plots (stereonets) and GIS queries helps characterize local structural domains and partition a data set into appropriate regions for specific interpretation paths. These interpretive paths are varied depending on each geologic environment but generally include the interpretation of fabric form lines and surfaces through vector fields i.e. fabric trajectory mapping, extending faults and horizon markers through these fields onto and across interpretive corridors i.e.cross-sections and plan views via projections. Our work will focus on the design and implementation of an optimized interpretive environment that will build on SPARSE © tools and be integrated into an Interpretive Structural Workflow (ISW) that will hopefully be an asset to structural geologists who are working with these structural data types.