Research Interests

 

I focus on the geodynamical processes of temporal and spatial evolution of subduction zone such as time-evolvng subducting slab, slab buckling, and plume-slab interaction. Because these geodynamical processes are expressed as surfacial deformation and structures on the Earth, I am intested in tectonics. Recently, I am studying slab dehydration and fluid flow in subduction zones. I summarize my research topics described below.

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Slab Dehydration and Fluid Flow

Subducting slab experiences dehydration due to increases in pressure and temperature. The dehydrated water inserted into the mantle wedge results in flux melting, responsible for the arc volcanism. I am studying slab dehydration and fluid flow in the subducting zones using 2- and 3-D numerical modeling. (Yoo and Lee, 2020; Lee et al., 2021)

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Volcano Clustering in NE Japan

 

Volcano clustering in NE Japan is thought to be releated to the 'hot fingers' in the mantle wedge. A 3-D numerical model study suggests that the hot fingers originated from the back-arc mantle strengthens the establishment of the volcano clustering. (Lee and Wada, 2017)

Cretaceous East Asian Tectonics

 

The tectonic history of East Asia during the Cretaceous is expressed as complicated igeneous activities such as adakite, adakitic rocks and A-type granitoids as well as basin-and-range type fault basins such as the Songliao basin. I suggested that the complicated tectonic history in East Asia during the Cretaceous was attributed to plume-plate and plume-slab interactions. (Ryu and Lee, 2017)

Time-evolving Subduction

 

I evaluated the effect of time-evolving subduction during the Cenozoic in the East Asian subduction zones such as Izu-Bonin-Mariana. The numerical model calculations show that other geological processes such as plume-slab interaction is relevant to the adakites or boninites in the subduction zones. (Kim and Lee, 2016)

Abukuma Adakite in NE Japan

 

The genesis of the 'typical' adakite erupted in the Abukuma region, NE Japan at ~16 Ma has been debated for years because the subduciton environments were not relevant to slab melting. Using 2-dimensional time-evolving subduction model, I show that the interaction between the infiltrated blob of the underlying hot mantle through the slab and subducting slab resulted in temporal and localized slab melting resulting in the Abukuma adakite. (Lee and Lim, 2014)

Slab Buckling

 

Subduction slab expriences buckling (lateral deformation resulting in stacking) due to viscosity increase across the 660 km discontinuity and phase transformation in the transition zone. I evaluated the effect of slab buckling on the seismology, structural geology and tectonics. (Lee and King, 2011)