Collapse-sinkholes and radar interferometry reveal neotectonics concealed within the Dead Sea basin

Details Collapse-sinkholes and radar interferometry reveal neotectonics concealed within the Dead Sea basin Collapse-sinkholes and radar interferometry reveal neotectonics concealed within the Dead Sea basin

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30j..52a&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 10, pp. 52-1, CiteID 1545, DOI 10.1029/2003GL017103

Physics

Geophysics

9

Exploration Geophysics: Seismic Methods (3025), Seismology: Seismic Hazard Assessment And Prediction, Structural Geology: Fractures And Faults, Structural Geology: Role Of Fluids, Tectonophysics: Continental Neotectonics

Scientific paper

The Dead Sea (DS) pull-apart basin is one of the more seismically active segments of the DS Transform plate boundary. In the last decade, hundreds of collapse-sinkholes have been formed along the DS coastlines in Israel and Jordan, causing severe damage to the regional infrastructure. The formation of these sinkholes is attributed to the dissolution of a buried salt layer by fresh groundwater due to the drop of the DS and the associated groundwater levels. Here we show that the sinkhole distribution, combined with gradual land subsidence measured by radar interferometry (InSAR) track young fault systems suspected as active, concealed within the fill of the DS rift. This notion is supported by (1) sinkholes clustering along discrete lineaments with a striking trend similarity to that of the exposed rift-margin faults; (2) prominent discontinuities in seismic reflection profiles offsetting young sediments (several kyrs old) below sinkhole lines, and (3) straight boundaries of gradual subsidence features that coincide with or parallel sinkhole lines. Combined, the sinkhole lineaments and the InSAR measurements reveal a zigzag pattern of buried faults within the DS rift fill.

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