A review of previous work relevant to the formation of concentrations of chromite in
peridotites from ophiolitic (sl) sequences highlights some of the key problems in …

The metaturbidites of the Palaeoproterozoic Jormua–Outokumpu thrust belt in eastern
Finland enclose m-to km-scale ultramafic massifs that are distributed over an area of more …

Abyssal peridotites are normally thought to be residues of melting of the mid-ocean ridge
basalt (MORB) source and are presumably a record of processes affecting the upper mantle …

Chromites separated from the upper mantle or lower crustal portions of 18 ophiolites ranging
in age from 900 Ma to 50 Ma are examined for Re-Os isotopic systematics. The ophiolites …

Since the first application of the 187Re–187Os isotope system to determine the timing of
melt extraction from peridotites twenty years ago, a plethora of studies have demonstrated its …

Tectonically emplaced mantle rocks, such as ophiolites, abyssal peridotites, and orogenic
peridotite massifs, provide a principle constraint on the composition of and processes in the …

The timing, causes and extent of mantle heterogeneity preserved in the∼ 492Ma Shetland
Ophiolite Complex (Scotland) are evaluated using Re–Os isotope and whole rock highly …

Podiform chromitite deposits occur in the mantle sequences of many ophiolites that were
formed in supra-subduction zone settings (SSZ). We have measured PGE abundances and …

Initial 187Os/188Os isotopic compositions for geochronologically and geologically well-
constrained 3.8-Ga spinel peridotites from the Itsaq Gneiss Complex of southern West …

Seismically detectable discontinuities at mid-depths of some cratonic lithospheric mantle
define mid-lithosphere discontinuities (MLD), demonstrating that the lithospheric mantle is …