The Timescale of Plume-Driven Recratonization: A Complete Record from
the Tarim Basin, Northwest China
Abstract
How fast a plume can stitch two cratonic nuclei into a stable one
remains under-investigated. The Tarim continental block in central Asia
is recratonized by a Permian-aged plume and preserves a complete record
before, during, and after the plume-driven recratonization. Here we
conduct area-depth analysis on seismic reflection data from the central
Tarim Basin to date the Phanerozoic deformation. All thrusts and
strike-slip faults investigated underwent an early deformation stage
(Earliest Ordovician-Middle Devonian), a hiatus stage (Late
Devonian-Late Permian), and a newly-discovered deformation stage
throughout the Mesozoic. Both deformation stages within Tarim are driven
by the subduction and accretion surrounding the block. The Mesozoic
finite strains highlight the continuous adjustment as the plume-welded
continental lithosphere heals and strengthens. The Tarim plume-driven
recratonization concludes not immediately, but ~200 Myr
after the plume activity ceased, establishing a characteristic timescale
for such events in Earth’s history.