Analysis of Tectonic Activity in the Central-southern Segments of the Luohu Faults,Guangdong Province
The tectonic activity of the fault zone has a significant impact on regional crustal stability,earthquake and deformation monitoring,as well as the design and construction of major projects.We focus on studying of the stratigraphic composition,distribution characteristics,and structural deformation characteristics of the central-southern sections of the Luohu Faults,and adopt chronological testing methods such as the radioactive 14C of the strata and the illite 40K-39Ar of the fault gouge,then find that there has been no obviously activity of the Luohu faults since the late Middle Pleistocene.Besides,the Luohu Faults had experienced ductile deformation in the Early Cretaceous and brittle deformation in the Late Cretaceous.The brittle deformation activity in the Late Cretaceous may have continued until the early Paleocene.In the middle Eocene,another phase of tectonic activity may have occurred in the central-southern sections of the Luohu Faults.
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