Zagros Mountains and Iraq’s Tectonic Subsidence

  • 27 Feb 2025

In News:

Recent geological studies have found that the hilly region around the Zagros Mountains in northern Iraq is slowly sinking into the Earth, a process attributed to ancient tectonic dynamics. This discovery has implications for earthquake prediction and geothermal energy potential.

Zagros Mountains

  • Location: Stretches ~1,500 km from eastern Turkey and northern Iraq across the Iranian Plateau to the Strait of Hormuz.
  • Highest Peak: Mount Dena (4,409 m / 14,465 ft).
  • Geological Composition: Primarily limestone and shale from the Mesozoic Era and Paleogene Period.
  • Climate: Semi-arid temperate – cold winters and dry, arid summers.
  • Vegetation: Dominated by oak and pistachio trees with steppe vegetation.

Geological Process Behind Iraq’s Sinking

  • The Zagros region is influenced by the tectonic collision between the Arabian and Eurasian Plates.
  • A sinking oceanic slab, part of the ancient Neotethys Ocean floor (over 66 million years old), is pulling the region down.
  • This slab is subducting beneath the Eurasian Plate, a process occurring over tens of millions of years, making it imperceptible in human timescales.

Research Insights

  • The studyused rock records, sediment analysis, and deep-earth imaging to understand the tectonic architecture of the region.
  • The findings explain why the depressions around the Zagros Mountains are deeper than the current topography would suggest.

Significance of the Study

  • Helps develop precise geological models critical for:
    • Earthquake prediction – by understanding fault depths and configurations.
    • Geothermal energy exploration – estimating areas with high geothermal gradients.
  • Especially relevant in a region prone to seismic activity (e.g., 2023 Turkey-Syria earthquakes).