The mantle perspective provided by radiogenic isotope geochemistry has evolved over the
last 40 years. Although the idea of an upper mantle depleted in incompatible elements by …

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 …

Mantle melting, which leads to the formation of oceanic and continental crust, together with
crust recycling through plate tectonics, are the primary processes that drive the chemical …

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 …

Volatile and stable isotope data provide tests of mantle processes that give rise to mantle
heterogeneity. New data on enriched mid‐oceanic ridge basalts (MORB) show a diversity of …

In order to improve characterisation of volatiles in the EM1 and EM2 mantle sources, which
are interpreted to contain subducted sedimentary or lithospheric components, we report …

Abstract HIMU (high-μ; 238 U/204 Pb) is a mantle reservoir that has been thought to form by
subduction and subsequent storage of ancient oceanic crust and lithosphere in the mantle …

Abstract We present new He-Sr-Nd-Pb-Os isotopic compositions and major and trace-
element concentrations for ten subaerially-erupted lavas and one seamount lava associated …

To characterize the heavy noble gas composition of MORBs we present new He, Ne, Ar, and
Xe abundances and isotopic compositions from the equatorial Mid-Atlantic Ridge. Both …

Abstract The Cook–Austral volcanic lineament is thought to be the product of three
overlap** South Pacific hotspot tracks: Macdonald, Arago, and Rarotonga. However, the …