Global data for measured Fe 2 O 3/FeO ratios and Cu contents in unaltered volcanic and
intrusive arc rocks indicate that, on average, they are slightly more oxidized than other …

Porphyry deposits supply most of the world's Cu and Mo resources. Over 90% of the
porphyry deposits are found at convergent margins, especially above active subduction …

Much of the world's economic copper resources are hosted in porphyry copper deposits
(PCDs), shallow level magmatic intrusions associated mostly with thick (> 45 km) magmatic …

The continental crust is strongly depleted in copper compared with its building blocks—
primary arc magmas—and this depletion is intrinsically associated with continental crust …

Oxygen fugacity (fO 2) is a key factor that controls the formation of porphyry Cu deposits.
Porphyry Cu deposits are typically oxidized, but when and how porphyry magmas gain their …

BACKGROUND Rocks from the Earth's mantle occur in a wide range of geologic settings (1)
as peridotite massifs, now referred to as orogenic peridotites;(2) as spinel-(rarely garnet) …

Young (61 Ma) unaltered picrites from Baffin Island, northeast Canada, possess some of the
highest 3 He/4 He (up to 50 Ra) seen on Earth, and provide a unique opportunity to study …

Continental arc magmas supply the ore-forming element budget of most globally important
porphyry-type ore deposits. However, the processes enabling certain arc segments to …

Resolving the geochemical discrepancies between the bulk continental crust and its
building blocks, basaltic arc magmas, can provide insights into the processes by which the …

In order to assess the role of sulfide in controlling the ore metal budgets and fractionation
during magmatic genesis and differentiation, the partition coefficients (D) of V, Mn, Co, Ni …