Earth's mantle transition zone (MTZ) is characterized by several sharp increases in seismic
wave speed between~ 300 km and~ 850 km depth. These seismic discontinuities are …

Ultralow velocity zones (ULVZs) are the most anomalous structures within the Earth's
interior; however, given the wide range of associated characteristics (thickness and …

Noble gas isotope systematics, particular those of He, have been fundamental in showing
that some ocean island basalts (OIB) were sourced from deep mantle plumes. Relationships …

Volcanic hotspots are thought to be fed by hot, active upwellings from the deep mantle, with
excess temperatures (T ex)~ 100° to 300° C higher than those of mid-ocean ridges …

Cubic CaSiO3 perovskite is a major phase in subducted oceanic crust, where it forms at a
depth of about 550 kilometres from majoritic garnet,,. However, its rheological properties at …

With plate tectonics operating on Earth, the preservation potential for mantle reservoirs from
the Hadean Eon (> 4.0 Ga) has been regarded as very small. The quest for such early …

Subduction redistributes elements between Earth's principal geochemical reservoirs,
modifying the chemical composition of Earth's mantle, crust, atmosphere, and hydrosphere …

Subducted oceanic crust (SOC) is one of the major sources of chemical heterogeneity in
Earth's mantle. Previous geodynamic modeling studies have shown that SOC in the …

We present detailed 3‐D images of the whole mantle P wave velocity structure beneath
Southeast Asia and surrounding regions. The results are obtained by applying an improved …

The extent to which primordial mantle domains have survived billions of years of convective
mixing is a fundamental question in mantle dynamics and geochemistry. The observation …