Michael A. Antonelli

TL;DR: Anomalous sulphur isotope signatures indicating mass-independent fractionation (MIF) in olivine-hosted sulphides from 20-million-year-old ocean island basalts from Mangaia, Cook Islands (Polynesia), which have been suggested to sample recycled oceanic crust, suggest that sulphur was subducted into the mantle before 2.45 billion years ago and recycled into theantle source of Mangaia lavas.

TL;DR: A model suggesting that Ca, and Sr exchange in particular, may have been much different in the geologic past, which has important implications for the interpretation of Sr isotope records in paleoseawater and ancient oceanic crust is presented.

TL;DR: In this article, the authors compared DFT-predicted equilibrium Ca isotope fractionation factors for plagioclase, garnet, clinopyroxene, orthopyroxenes, olivine, and apatite.

TL;DR: The emerging picture is that Ca isotopes are sensitive to a large number of high-temperature processes and can be used to understand the evolution of crust and mantle reservoirs, along with mechanisms leading to the formation of igneous, metamorphic, and hydrothermal rocks and minerals through geologic time.

TL;DR: The 33S depletions support the idea that differentiated planetesimals inherited sulfur that was photochemically derived from gases in the early inner solar system (<∼2 AU), and that bulk innerSolar system S-isotope composition was chondritic (consistent with IAB iron meteorites, Earth, Moon, and Mars).