[Objective]The Changle-Zhao'an fault zone is one of the primary active faults running along the coast of the Fujian Province.This fault zone has induced several destructive earthquakes and is thus a principal seis-mogenic structure in the Fujian Province.Therefore,tight constraints on the Late Quaternary activity of the Changle-Zhao'an fault zone has significant significance.[Methods]Based on field survey along the Dongshan seg-ment of the eastern branch of the Changle-Zhao'an fault in the Dongshan County,Fujian Province,the timing for the motion of this fault portion was determined to be between(34.8±8.3)ka and(48.0±3.5)ka by using K-feldspar luminescence dating of the strata above the fault break point and footwall.[Results]This indicates that the fault remained active since the Late Pleistocene.Furthermore,we estimated the potential maximum seismicity along the fault using the empirical relationship between magnitude(M)and fault dislocation(D).[Conclusion]Determination of a Late Pleistocene active fault,along with the estimate of the maximum earthquake magnitude,provides precise chronological evidence for understanding the activity of the Changle-Zhao'an fault zone.Our results thus serves as an important basis for conducting urban safety assessments in Dongshan County.
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