Since faults are active on different time scales and can be repeatedly reactivated, their displacement chronology is difficult to reconstruct. This study represents a multi-geochronological approach to unravel the evolution of an intracontinental fault zone locality along the Danube Fault, central Europe. At the investigated fault locality, ancient motion has produced a cataclastic deformation zone in which the cataclastic material was subjected to hydrothermal alteration and K-feldspar was almost completely replaced by illite and other phyllosilicates. We propose that later reactivation of the fault caused loss of helium in the fluorites. This assertion is supported by geological evidence, i. Active faults or paleoearthquakes can be dated either by cosmogenic isotopes see, e.

The dating of shallow faults in the Earth's crust



Electron Spin Resonance (ESR) Dating of Calcareous Fault Gouge of the Ushikubi Fault, Central Japan
Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. The ages of fault events of active faults have been estimated using electron spin resonance ESR signals of siliceous gouges. This technique of ESR method is limited by obtaining only ages that are greater than tens of millennia.


Electron Spin Resonance (ESR) Dating of Calcareous Fault Gouge of the Ushikubi Fault, Central Japan
James S. Hnat, Ben A. GSA Bulletin ;; : — Illite age analysis IAA , the method of comparing radiometric ages of successive size fractions with varying percentages of detrital illite, has been successfully applied to several rock types, including fault gouge, shales and argillaceous limestones.
Clay Minerals ;; 53 3 : — Radiometric dating of fault gouges has become a useful tool for regional tectonics studies and for exploring and understanding fault and earthquake processes. Methods to define the absolute age of faults achieved a solid scientific foundation almost 25 years ago when the development and application of illite age analysis for investigating sedimentary burial and thermal histories found a new potential application — defining the age of fold-and-thrust development. These refinements to the methods have improved their application in fold-and-thrust terrains and have opened up applications in normal and strike-slip fault environments.