Radial clastic dykes formed by a salt diapir in the Dead Sea Rift, Israel

Shmuel Marco, Ram Weinberger, Amotz Agnon

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Fanning structures radiating from a central perturbation are known in various geological environments, where different processes have produced similar geometry. The present contribution describes and analyses fanning clastic dykes in the Dead Sea Rift, a new example of diapir-related deformation. The dykes are opening-mode fractures exposed in lacustrine varved marl of the Lisan Formation, deposited 70-15 ka. They are arranged mainly in a radial and tangential geometry. The radial traces converge at the 'Black Hill' structural dome. The geometry of the fractures is consistent with stresses exerted by the rise of a salt diapir located underneath the Black Hill. The estimated extension of the radial fractures is in good agreement with the present topographic elevation of the hill. The absence of fractures in the overlying Holocene alluvium probably indicates that either the rise of the Black Hill salt diapir paused or is associated now with a different style of deformation.

Original languageEnglish
Pages (from-to)288-294
Number of pages7
JournalTerra Nova
Volume14
Issue number4
DOIs
StatePublished - 1 Aug 2002
Externally publishedYes

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