Newly developed paleomagnetic map of the Easternmost Mediterranean joined with tectono-structural analysis unmask geodynamic history of this region

Lev Eppelbaum, Youri Katz

Research output: Contribution to journalArticlepeer-review

Abstract

Comprehensive magnetic-paleomagnetic analysis of physical-geological models developed for the Easternmost Mediterranean (northern part of the Sinai plate) accompanied by gravity and seismic data examination enabled the detection of a zone of inverse magnetization of submeridional strike with a total volume exceeding 120,000 km3. Such a large zone must correspond to the prolonged period of inverse polarity in the Earth's magnetic field history. We suggest that this inversely magnetized thick block of the Earth's crust corresponds to the known Kiama hyperzone. A paleomagnetic map constructed on the basis of abovementioned geophysical data analysis combined with detailed examination of structural, radiometric, petrological, facial, paleogeographical and some other data indicates that to the west of the Kiama zone is situated the Jalal zone, and to the east - Illawarra, Omolon and Gissar zones. Discovery of the Kiama paleomagnetic zone combined with tectonogeodynamical analysis and paleobiographical data examination indicates that the Earth's oceanic crust blocks may have been shifted by transform faults from the eastern part of the Tethys Ocean to their modern position in the Easternmost Mediterranean. Analysis of potential geophysical fields and seismological maps integrated with tectonostructural examination show the isolation of the northern part of Sinai plate from other terranes. For the first time formation-paleogeographical maps of Triassic and Jurassic for the Easternmost Mediterranean have been compiled and their tectono-geodynamical explanation has been given. The obtained data create a basis for reconsidering tectonic zonation, paleogeodynamical reconstructions and searching for economic deposits in this region.

Original languageEnglish
Pages (from-to)95-117
Number of pages23
JournalOpen Geosciences
Volume7
Issue number1
DOIs
StatePublished - 2015

Keywords

  • 3D magnetic and gravity modeling
  • geodynamics
  • multiparametric geological-geophysical analysis
  • oceanic crust composition
  • palaeomagnetism
  • structural stages

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