3D Fracture Model Construction in Northeast Taiwan
Abstract
Three-dimensional geological model is a broad view to evaluate the spatial distribution of geological objects from the surface to the depth of the Earth. Distribution, density variation, and connectivity of the fracture system in spatial are always received special attention from geologists for the considerations with regarding to the mining and exploration development, disaster forecasting and even the evolution of mountain building processes. The recent development of GIS and remote sensing technology provided opportunities to access and collect data of fracture system in high mountain range which is high risk potential for conducting fieldwork.
Our research aims to seeking, identifying, investigating the geometric characteristics of fractures of NE Taiwan into 3D fracture map while realizing the evolution of tectonic phases from compressive subduction at south to back-arc extension at north in this active orogenic belt. The 3D fracture map in NE Taiwan could be used to interpret the orientation of the fractures network system corresponded to the certain stress regime from reverse faulting, strike-slip fault to normal faulting. Furthermore, since the presence of different in-situ stress regimes can cause reactivation of pre-existing fractures and even promote the formation and development of new different fracture systems, the distribution of the morphotectonic lineaments analyzed on the DTM can afford essential information of these geometric characteristics of fracture systems. Additionally, our approach of characterizing the development of fracture pattern correlated to different tectonic stress state involves calculating resolved stresses on fracture surface with different orientation. The 3D fracture model should be able to help examining the feasibility of active fractures based on the likelihood of slip and dilation tendency with favorable orientations for potentially significant improvement of further applications in term of landslide, groundwater and scientific research issues.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.T33E0366H
- Keywords:
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- 9320 Asia;
- GEOGRAPHIC LOCATION;
- 7221 Paleoseismology;
- SEISMOLOGY;
- 8107 Continental neotectonics;
- TECTONOPHYSICS;
- 8175 Tectonics and landscape evolution;
- TECTONOPHYSICS