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Session Proposal: Deciphering Fault Slip Dynamics and Earthquake Nucleation Mechanisms in Shallow Crustal Settings through a Physicochemical Perspective (AGU25)

T004
Deciphering Fault Slip Dynamics and Earthquake Nucleation Mechanisms in Shallow Crustal Settings through a Physicochemical Perspective

Session ID#: 250202

Session Description:
The fault slip rate helps in assessing the regional strain accumulation and probabilistic seismic hazards. The recent catastrophic earthquake in the Sagaing fault, Myanmar, was thus predicted by a slip rate relatively higher in its central part (~23 mm/yr) than that in other adjacent parts (~16 mm/yr). However, fault slip behaviour is a complex interplay between the stress impoundment and fault strength. Accordingly, it can be influenced by several chemical processes in fault zones, including fluid-rock interaction, hydrothermal alteration, clay mineralisation, as also reported in Koyna-Warna region in Western India, Alpine fault in New Zealand, Nankai Trough in Japan and the central part of the San Andreas fault in the USA. Hence, this multidisciplinary session welcomes the comprehensive studies on fault slip dynamics in shallow crustal settings through geochemical and mineralogical analyses of the fault zones and measurement of fault slip rate using structural, geomorphological, paleoseismological, geodetic and geochronological methods.
Co-Sponsor(s):
  • NH - Natural Hazards
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1042 Mineral and crystal chemistry [GEOCHEMISTRY]
3902 Creep and deformation [MINERAL PHYSICS]
8036 Paleoseismology [STRUCTURAL GEOLOGY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
Primary Convener:  Piyal Halder, Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India; Birbal Sahni Institute of Palaeosciences (DST, Govt. of India), Lucknow, India
Conveners:  Francesca R Cinti, Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy, Shreya Arora, Bates College, Earth and Climate Sciences, Lewiston, United States and Anupam Sharma, Birbal Sahni Institute of Palaeosciences (DST, Govt. of India), Lucknow, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
 
STUDY OF A NEW CRUSTAL STRESS MEASUREMENT METHOD POSSIBLE IN A VERTICAL DOWNHOLE FOR SEDIMENTARY SOFT ROCKS (PART 2) (1853078)
Dr. Tatsuya Yokoyama, Fukada Geological Institute, Tokyo, Japan
 
An EBSD Investigation of the Sanbagawa Schist: Deformation Mechanisms, Slip Systems, and Differential Stress at the Downdip Limit of the Seismogenic Zone (1923852)
Evan Jakovac, Pennsylvania State University Main Campus, Geosciences, University Park, United States, Andrew Smye, Pennsylvania State University Main Campus, University Park, United States and Donald M Fisher, Pennsylvania State University, Department of Geosciences, University Park, United States
See more of: Tectonophysics
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