Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/13157
Authors: Gautier, S.* 
Latorre, Diana* 
Virieux, J.* 
Deschamps, A.* 
Skarpelos, C* 
Sotiriou, A* 
Serpetsidaki, A* 
Tselentis, A.* 
Title: A New Passive Tomography of the Aigion Area (Gulf of Corinth, Greece) from the 2002 Data Set
Journal: Pure and Applied Geophysics 
Series/Report no.: 2-3/163 (2006)
Issue Date: 2006
DOI: 10.1007/s00024-005-0033-7
Abstract: We present the results of a tomographic study performed in the framework of the 3F-Corinth project. The aim of this work is to better understand the rifting process by imaging the crustal structure of the western Gulf of Corinth. Forty-nine stations were deployed for a period of six months, allowing us to monitor the microseismicity. Delayed P and S first-arrival times have been simultaneously inverted for both hypocenter locations and 3-D velocity distributions. We use an improved linearized tomography method based on an accurate finite-difference travel-time computation to invert the data set. The obtained Vp and Vs models confirm the presence of a two-layer vertical structure characterized by a sharp velocity gradient lying at 5–7 km depth, which may be interpreted as a lithological contrast. The shallower part of the crust (down to 5 km depth) is controlled by the N-S extension and lacks seismicity. The deeper part (7–13 km depth) matches the seismogenic zone and is characterized by faster and more heterogeneous anomalies. In this zone, the background seismicity reveals a low-angle active surface dipping about 20° toward the north and striking WNW-ESE. The position of this active structure is consistent with both high Vp/Vs and low Vp.Vs anomalies identified at 8–12 km depth and suggesting a highly fracturated and fluid-saturated zone. Both the geometry of the active structure beneath the gulf and the presence of fluids at 8–12 km depth are in accordance with a low-angle detachment model for the western part of the Gulf of Corinth.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat Existing users please Login
Gautier_et_al_Pageoph_2006.pdf1.04 MBAdobe PDF
Show full item record

WEB OF SCIENCETM
Citations

33
checked on Feb 10, 2021

Page view(s)

88
checked on Mar 27, 2024

Download(s)

2
checked on Mar 27, 2024

Google ScholarTM

Check

Altmetric