The continental crust is unique to the Earth in the solar system, and controversies remain
regarding its origin, accretion and reworking of continents. The plate tectonics theory has …

▪ Abstract The Re-Os isotope sytem, based on the long-lived β− transition of 187Re to
187Os, has matured to wide use in cosmochemistry and high-temperature geochemistry …

The solvent extraction of Os from geological samples digested in aqua regia has been
investigated. A straightforward procedure has been developed in which OsO4 is partitioned …

A mass imbalance exists in Earth for Nb, Ta, and possibly Ti: continental crust and depleted
mantle both have subchondritic Nb/Ta, Nb/La, and Ti/Zr, which requires the existence of an …

Unlike in the ocean basins where the shallow mantle eventually contributes to the
destruction of the overlying crust, the shallow mantle beneath continents serves as a stiff …

To this day, there is a great amount of controversy about where, when and how the so-called
supercontinents--Pangea, Godwana, Rodinia, and Columbia--were made and broken …

The composition of the subcontinental lithospheric mantle (SCLM) varies in a systematic
way with the age of the last major tectonothermal event in the overlying crust. This secular …

Bulk compositions and mineral analyses for forty-one, large, garnet-and spinel-facies
peridotite xenoliths from the Udachnaya kimberlite in the central Siberian platform have …

Os isotopic compositions of lithospheric peridotite xenoliths erupted by kimberlites in the
Kaapvaal craton are almost exclusively less radiogenic than estimates of Bulk Earth …

I review geologic evidence for Archean plate tectonic processes within the framework of
geophysical, geochemical and experimental observations. For the Late Archean (2.5–3.0 …