Holocene Earthquakes Inferred from a Fan-Delta Sequence in the Dead Sea Graben

Abstract The Holocene sequence of the fan-delta of Nahal Darga, in Israel, records deformation associated with earthquakes related to the Dead Sea Transform in general and to the Jericho Fault in particular. The fan-delta sequence is well exposed, and 20 radiocarbon ages help to date the earthquakes that are inferred from (a) displacement along faults, (b) liquefaction features associated with 11 separate sandy and silty layers, and (c) slumped allocthonous bodies of sediments located directly above one of the main splays of the Jericho Fault. On average, an earthquake larger than M 5.5 has occurred approximately every 600 years. This estimate is based on the earthquake record of the complete stratigraphic sequence, with erosional hiatuses omitted from the calculations. The most recently deformed layer is related to the 1927 Jericho (M L 6.2) earthquake. This layer provides a modern analog for the style of soft-sediment deformation associated with earthquakes in the late Pleistocene and Holocene silty sand beds of the fan-delta complexes of the Dead Sea and its predecessor, Lake Lisan.

[1]  A. Hofstetter,et al.  Seismicity of the eastern Mediterranean region: Perspective from the Sinai subplate , 1996 .

[2]  D. Wells,et al.  New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement , 1994, Bulletin of the Seismological Society of America.

[3]  C. Finkl.  Sedimentary structures — their character and physical basis , 1983 .

[4]  Francis T. Wu,et al.  Microearthquakes along the Dead Sea Rift , 1973 .

[5]  Z. Meshel,et al.  Archaeological evidence for Subrecent seismic activity along the Dead Sea–Jordan Rift , 1977, Nature.

[6]  John K. Hall,et al.  Geophysical investigations in the Dead Sea , 1979 .

[7]  A. Hofstetter,et al.  Fault geometry and spatial clustering of microearthquakes along the Dead Sea-Jordan rift fault zone , 1990 .

[8]  M. Thiry,et al.  Seismically induced deformation structures in Oligocene shallow-marine and aeolian coastal sands (Paris Basin) , 1992 .

[9]  S. F. Obermeier,et al.  Geologic Evidence for Recurrent Moderate to Large Earthquakes Near Charleston, South Carolina , 1985, Science.

[10]  A. Nur,et al.  Tectonics, seismicity and structure of the Afro-Eurasian junction — the breaking of an incoherent plate , 1976 .

[11]  P. Talwani,et al.  Paleoseismic indicators near Bluffton, South Carolina: An appraisal of their tectonic implications , 1993 .

[12]  Z. Ben‐Avraham,et al.  Evidence for Jericho earthquakes from slumped sediments of the Jordan River delta in the Dead Sea , 1994 .

[13]  A. Hofstetter,et al.  Microearthquake activity in the Dead Sea region , 1989 .

[14]  P. Reimer,et al.  Extended 14C Data Base and Revised CALIB 3.0 14C Age Calibration Program , 1993, Radiocarbon: An International Journal of Cosmogenic Isotope Research.

[15]  A. Agnon,et al.  Prehistoric earthquake deformations near Masada, Dead Sea graben , 1995 .

[16]  A. Ben-menahem,et al.  Micro- and macroseismicity of the Dead Sea rift and off-coast eastern Mediterranean , 1981 .

[17]  J. Gat,et al.  The Dead Sea: The Lake and Its Setting , 1999 .

[18]  A. Maltman.  The Geological deformation of sediments , 1994 .

[19]  Zvi Garfunkel,et al.  Active faulting in the dead sea rift , 1981 .

[20]  Z. Reches,et al.  Holocene seismic and tectonic activity in the Dead Sea area , 1981 .

[21]  Zvi Garfunkel,et al.  The structure of the Dead Sea basin , 1996 .

[22]  G. Bonani,et al.  Late Quaternary Geological History of the Dead Sea Area, Israel , 1993, Quaternary Research.

[23]  J. Allen.  Earthquake magnitude-frequency, epicentral distance, and soft-sediment deformation in sedimentary basins , 1986 .

[24]  J. Dewey,et al.  Earthquake-induced deformational structures in young lacustrine sediments, East Anatolian Fault, southeast Turkey , 1983 .

[25]  M. Stein,et al.  Long-term earthquake clustering: A 50,000-year paleoseismic record in the Dead Sea Graben , 1996 .

[26]  J. Sims.  Determining earthquake recurrence intervals from deformational structures in young lacustrine sediments , 1975 .

[27]  J. Sims.  Earthquake-Induced Structures in Sediments of Van Norman Lake, San Fernando, California , 1973, Science.

[28]  Z. Ben‐Avraham,et al.  The anatomy of a pull‐apart basin: Seismic reflection observations of the Dead Sea Basin , 1989 .

[29]  W. Manspeizer.  The Dead Sea Rift: Impact of Climate and Tectonism on Pleistocene and Holocene Sedimentation , 1985 .

[30]  I. Carmi,et al.  The Holocene climatic record of the salt caves of Mount Sedom Israel , 1991 .

[31]  Ari Ben-Menahem,et al.  Four thousand years of seismicity along the Dead Sea Rift , 1991 .

[32]  Y. Eyal,et al.  Tectonic analysis of the Dead Sea Rift Region since the Late-Cretaceous based on mesostructures , 1983 .

[33]  Amos Nur,et al.  A new estimate for the epicenter of the Jericho earthquake of 11 July 1927 , 1993 .

[34]  Zvi Garfunkel,et al.  Holocene tectonic deformation along the western margins of the Dead Sea , 1990 .

[35]  N. Christie‐Blick,et al.  Strike-Slip Deformation, Basin Formation, and Sedimentation , 1985 .

[36]  R. Freund.  A Model of the Structural Development of Israel and Adjacent Areas Since Upper Cretaceous Times , 1965, Geological Magazine.

[37]  A. Sneh.  Late Pleistocene Fan-Deltas Along the Dead Sea Rift , 1979 .

[38]  John K. Hall,et al.  Distribution of Holocene sediments and neotectonics in the deep north basin of the Dead Sea , 1993 .

[39]  G. C. Amstutz.  Developments in Sedimentology , 1965 .

[40]  M. Hempton,et al.  Deltaic sedimentation in the Lake Hazar pull‐apart basin, south‐eastern Turkey , 1984 .