Article ID Journal Published Year Pages File Type
4732528 Journal of Asian Earth Sciences 2006 16 Pages PDF
Abstract

Paleostress orientations and relative paleostress magnitudes (stress ratios), determined by using the reduced stress concept, are used to improve the understanding of the kinematic characteristics of the Denizli Basin. Two different dominant extension directions were determined using fault-slip data and travertine fissure orientations. In addition to their stratigraphically coeval occurrence, the almost exact fit of the σ2 and σ3 orientations for the NE–SW and NW–SE extension directions in the Late Miocene to Recent units indicate that these two extension directions are a manifestation of stress permutations in the region and are contemporaneous. This relationship is also demonstrated by the presence of actively developing NE–SW and NW–SE elongated grabens developed as the result of NE–SW and NW–SE directed extension in the region. Moreover, stress ratios plots indicate the presence of a zone of major stress ratio changes that are attributed to the interference of graben systems in the region. It is concluded that the plotting of stress orientations and distribution of stress ratios is a useful tool for detecting major differences in stress magnitudes over an area, the boundaries of which may indicate important subsurface structures that cannot be observed on the surface.

Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Geology
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