It is challenging to identify strike-slip faults in a Craton basin owing to their small displacement,small deformation,and complicated tectonic features,particularly in the context of low seismic resolution and false images in deep zones.According to typi-cal seismic signatures of intracraton strike-slip faults in the Tarim and Sichuan Basins and geologic factors,we identify misconcep-tions of seismic interpretation and extract three pitfalls.The first is that precipitous cliffs at basement,step-like fractures,and faul-ted horsts may be misinterpreted as flower structures;similar folds occurring vertically between the basement and overburden may be treated as strike-slip structures by mistake.The second is false images of underlying rock masses as steeply dipping strike-slip faults on seismic sections caused by the occurrence of eruptive rocks and evaporites with lateral thickness and lithology variations,leading to sudden interval velocity change laterally.The third is strike-slip fault-like responses related to some geologic phenome-na,e.g.large vertical ravines,karst landform,and lithofacies change.To avoid these pitfalls,the impacts of evaporite and igneous-rock velocities,landform,and lithofacies should be mitigated in enhanced-resolution seismic data interpretation.Seismic attribute maps are the top selection for strike-slip fault identification to exclude false images of strike-slip faults on seismic sections and es-tablish a correct model for seismic-geologic interpretation of strike-slip faults.
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