Features of seismogenic mass failure deposits in the Dead Sea center over the last 220 kyr based on the ICDP Dead Sea Core 5017-1

DOI

We investigated seismogenic mass failure deposits in the Dead Sea center over the last 220 kyr based on the ICDP Dead Sea Core 5017-1. We subdivide the seismogenic mass failure deposits into four basic types. (i) Seismogenic sandy turbidites; (ii) Laminae fragments-imbedded detritus layers; (iii) Slump deposits; (iv) Chaotic deposits. We measured the thickness and occurrence frequency of these seismogenic mass failure deposits. We applied XRF-data [ln(Ca/Ti)] and magnetic susceptibility to characterize these seismogenic mass failure deposits. Our Dead Sea case study provides a unique opportunity to distinguish and separate trigger and preconditioning factor(s) of subaqueous mass failure deposits. The record allows a statistical evaluation and correlation with potential preconditioning factors. We find that a variable sedimentation rate is not the preconditioning factor for mass failures under seismic shaking in the Dead Sea. Our dataset reveals that at the orbital- and millennial-scale, variable sedimentation rates are not a preconditioning factor for these mass failure deposits; (ii) at the centennial- to decadal-scale, earthquake-triggered mass failures can occur at any lake-level state; (iii) at the orbital- and millennial-scale, the mass failures are more frequent when lake-levels were high and punctuated by large-amplitude fluctuations.

Identifier
DOI https://doi.org/10.1594/PANGAEA.931843
Related Identifier References https://doi.org/10.1029/2021GL093391
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.931843
Provenance
Creator Lu, Yin ORCID logo
Publisher PANGAEA
Publication Year 2021
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Dataset
Format application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Size 108.2 kBytes
Discipline Earth System Research
Spatial Coverage (35.471 LON, 31.508 LAT); Dead Sea