Brown amphibole is a minor but common mineral component in lower oceanic crust. It is
generally interpreted as products of migrating SiO2 and H2O-rich fluids or melts, which can …

The structure of the lithosphere and the associated magmatic systems found in different
locations along slow‐spreading ridges can vary dramatically, from melt‐starved to …

Spinel-orthopyroxene symplectites are common throughout a> 1,200-m-thick sequence of
the Rustenburg Layered Suite in the Waterberg project area in the far north of the northern …

Various crustal processes shape both the lower oceanic crust and mid-ocean ridge basalts
(MORBs). To better understand how these crustal processes influence MORB compositions …

Olivine in carbonatites worldwide is mainly of Mg-rich composition (forsterite: Fo 85 and Fo
99). However, the occurrence of fayalite (Fo< 50) is extremely rare except few localities. The …

At mid-ocean ridges, melts that formed during adiabatic melting of a heterogeneous mantle
migrate upwards and ultimately crystallize the oceanic crust. The lower crustal gabbros …

Abstract The 290-to 282-Ma ophiolitic Liuyuan Complex in northwestern China preserves a
section of oceanic crust formed in a back-arc basin during the final stages of the evolution of …

Deep melt migration processes occurring beneath spreading ridges largely occur by porous
flow and involve reaction with the pre-existing crystal matrix. The control of the melt/rock …

Trace element concentrations in abyssal peridotite olivine provide insights into the formation
and evolution of the oceanic lithosphere. We present olivine trace element compositions (Al …

Microstructural and geochemical studies of olivine-rich troctolites have suggested that
melt/rock ratios play a key role in the interaction between an olivine matrix (dunite) and an …