The existence of mantle plumes was first proposed in the 1970s to explain intra-plate,
hotspot volcanism, yet owing to difficulties in resolving mantle upwellings with geophysical …

Mantle plumes originate at depths near the core− mantle boundary (~ 2,800 km). As such,
they provide invaluable information about the composition of the deep mantle and insight …

The lower plate is the dominant agent in modern convergent margins characterized by
active subduction, as negatively buoyant oceanic lithosphere sinks into the asthenosphere …

New tungsten isotope data for modern ocean island basalts (OIB) from Hawaii, Samoa, and
Iceland reveal variable 182W/184W, ranging from that of the ambient upper mantle to ratios …

Abstract The short-lived 182 Hf-182 W isotope system (t 1/2= 9 Ma) left evidence in both
ancient and modern terrestrial rock record of processes that took place during the earliest …

Helium isotopes provide an important tool for tracing early-Earth, primordial reservoirs that
have survived in the planet's interior,,. Volcanic hotspot lavas, like those erupted at Hawaii …

The extreme Sr, Nd, Hf, and Pb isotopic compositions found in Pitcairn Island basalts have
been labeled enriched mantle 1 (EM1), characterizing them as one of the isotopic mantle …

The element mercury (Hg) can develop large mass‐independent fractionation
(MIF)(Δ199Hg) due to photo‐chemical reactions at Earth's surface. This results in globally …

Abstract Knowledge of the timing of the closure of the Meso-Tethys Ocean as represented by
the Bangong–Nujiang Suture Zone, ie, the timing of the Lhasa-Qiangtang collision, is critical …

The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope
ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr …