High-resolution stratigraphy reveals repeated earthquake faulting in the Masada Fault Zone, Dead Sea Transform

Shmuel Marco*, Amotz Agnon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

A detailed study of the syndepositional Masada Fault Zone (MFZ) provides an example for fundamental characteristics of earthquakes, such as long term temporal clustering, repeated faulting on the same planes for a limited time of the order of a few thousands of years, and the formation of subaqueous breccia layers interpreted as seismites. The MFZ was studied in outcrops of 70-15 ka Lake Lisan sediments. Detailed columnar sections on both sides of well-exposed faults show that each individual fault exhibits a cluster, up to 4 ky long, with 3-5 slip events on the same plane. Each slip event is associated with the formation of widespread layers exhibiting soft sediment deformation, which are interpreted to be seismite layers. The uppermost part of the Lisan section, about 5 m, is not faulted, hence the last cluster of slip events ended about 25 ky ago. The clusters of activity of individual faults coalesce to form larger clusters. These are evident in the distribution of seismite layers throughout the entire Lisan section which shows earthquake clustering during periods of ∼10 ky. The clusters are separated by relatively quiescent periods of comparable duration.

Original languageAmerican English
Pages (from-to)101-112
Number of pages12
JournalTectonophysics
Volume408
Issue number1-4
DOIs
StatePublished - 28 Oct 2005

Bibliographical note

Funding Information:
We thank Revital Ken-Tor for her assistance in fieldwork. Constructive reviews by Anna Maria Blumetti, an anonymous referee, and the co-editors Franck Audemard and Alessandro Michetti significantly improved the manuscript. The study was funded by the Israel Science Foundation Grant 694/95 to A. Agnon and the Binational U.S–Israel Science Foundation Grant 97-286 to S. Marco.

Keywords

  • Dead Sea Fault
  • Earthquakes
  • Paleoseismology
  • Quaternary

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