Scattering and absorption imaging of a highly fractured fluid-filled seismogenetic volume in a region of slow deformation

作     者：Ferdinando Napolitano Luca De Siena Anna Gervasi Ignazio Guerra Roberto Scarpa Mario La Rocca Ferdinando Napolitano;Luca De Siena;Anna Gervasi;Ignazio Guerra;Roberto Scarpa;Mario La Rocca

作者机构：Dipartimento di Fisica“E.R.Caianiello”Universita Degli Studi di SalernoVia Giovanni Paolo IIFiscianoSA84084Italy Institute of GeosciencesJohannes Gutenberg University MainzJ.-J.-Becher-Weg 21MainzD-55128Germany University of AberdeenSchool of GeosciencesGeology and Petroleum GeologyMeston BuildingKing’s CollegeAberdeenScotlandAB243UEUK Dipartimento di BiologiaEcologia e Scienze Della TerraUniversit a Della CalabriaPonte P.BucciArcavacata di RendeCS87036Italy Istituto Nazionale di Geofisica e VulcanologiaSezione di Rende(CS)Ponte P.BucciArcavacata di RendeCS87036Italy 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2020年第11卷第3期

页      面：989-998页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：We thank Giuseppe Palladino and Professor Robert Butler for sharing their expertise about the geological features of the target area and Rob-erto Emanuele Rizzo for the relevant suggestions about the dynamics of fluids through fractures. Incisive comments from two anonymous re-viewers greatly improved the quality of the paper. The program used to compute the analysis is the MATLAB? code MuRAT 5.3.6.m available for downloading at:https://github.com/ferdinandonapolitano/Attenuation. The ITHACA catalogue we use can be found at:http://www.isprambiente .gov.it/it/progetti/suolo-e-territorio-1/ithaca-catalogo-delle-faglie-capa ci 

主　　题：Polling Seismic attenuation Scattering Fluids Fractures Healing 

摘      要：Regions of slow strain often produce swarm-like sequences,characterized by the lack of a clear mainshockaftershock *** comprehension of their underlying physical mechanisms is challenging and still *** used seismic recordings from the last Pollino swarm(2010-2014) and nearby to separate and map seismic scattering(from P peak-delays) and absorption(from late-time coda-wave attenuation) at different frequencies in the Pollino range and ***-scattering and high-absorption anomalies are markers of a fluid-filled fracture volume extending from SE to NW(1.5-6 Hz) across the *** increasing frequency,these anomalies approximately cover the area where the strongest earthquakes occurred from the sixteenth century until *** our interpretation,the NW fracture propagation ends where carbonates of the Lucanian Apennines begin,as marked by a high-scattering and low-absorption *** the highest frequency(12 Hz) the anomalies widen southward in the middle of the range,consistently marking the faults active during the recent Pollino *** results suggest that fracture healing has closed small-scale fractures across the SE faults that were active in the past centuries,and that the propagation of fluids may have played a crucial role in triggering the 2010-2014 Pollino *** that the fluid propagation ended at the carbonates barrier in the NW direction,fractures opened new paths to the South,favoring the nucleation of the last Pollino ***,the recently active faults in the middle of the seismogenic volume are marked by a high-scattering and highabsorption *** work provides evidence that attenuation parameters may track shape and dynamics of fluid-filled fracture networks in fault areas.