-The Fawakhir ophiolitic sequence is composed mainly of serpentinites, metagabbros, boninitic metagabbros and metavolcanics. The serpentinites have geochemical features similar to those of depleted-mantle peridotites. Major and trace element characteristics show that the ophiolitic metagabbro and metavolcanic rocks are of tholeiitic to calc-alkaline affinity. REE abundances in the metagabbros a...

Volcanic rocks erupted among Pitcairn seamounts sample a mantle plume that exhibits an extreme Enriched Mantle-1 signature. The origin of this peculiar endmember remains contentious, and could involve the recycling marine sediments Archean or Proterozoic ages, delaminated units from lower continental crust, metasomatized peridotites lithospheric mantle. Here, we report sulfur multi-isotopic sig...

Late Paleozoic to early Mesozoic subduction complexes formed during the evolution of southwestern Gondwana and extensively crop out along Chilean continental margin. Recent findings in northern Patagonia (40°–43°S) revealed that accretionary processes were active since Devonian when enhanced lithosphere stretching forearc led formation Chaitenia island arc. The extension crust consecutively dev...

Abstract The race for the most efficient, accurate, and universal algorithm in scientific computing drives innovation. At same time, this healthy competition is only beneficial if research output actually comparable to prior results. Fairly comparing algorithms can be a complex endeavor, as implementation, configuration, compute environment, test problems need well‐defined. Due increase compute...

Oceanic basalts, such as mid-ocean ridge basalts (MORB) and ocean island basalts (OIB), are characterized by large isotopic and trace element variability that is hard to reconcile with partial melting of a peridotitic mantle alone. Their variability has been attributed to the presence of heterogeneities within the mantle, such as recycled crust, metasomatized material or outer core contribution...

New H2O, CO2 and S concentration data for basaltic glasses from ‘hotspot’, with temperature differences of 200°C or more between hotter upwelling plumes and the ambient mantle Loihi seamount, Hawaii, allow us to model degassing, assimilation, adiabat (e.g. White & McKenzie, 1989; Campbell, 1998; and the distribution of major volatiles within and around the Davies, 1998). In contrast, it has lon...