Detailed geochemical and petrological studies of igneous rock suites in island arc and
continental marginal environments have revealed the complexity of magmatism in these …

Progressive alteration, diagenesis, and low-grade metamorphism of Archean greenstone
belts often leads to redistribution of alkali and related trace elements. Transition metals and …

Students of a phenomenon as common but complex as andesite genesis often are
overwhelmed by, or overlook, the volume and diversity of relevant information. Thus there is …

We report the results of partial melting experiments between 8 and 32 kbar, on four natural
amphibolites representative of metamorphosed Archean tholeiite (greenstone), high …

Several diagnostic chemical characteristics of an uncommon Aleutian magma type support a
proposed origin that involves a small amount of partial melting of subducted Pacific ocean …

The role of the subducting lithospheric slab in the genesis of mantle-derived (primitive)
magmas is investigated through a study of volcanic rocks formed in the tectonically strike …

Major-element, trace-element and isotopic compositions of approximately 1200 basalts (<
53 wt.% SiO 2) from intra-oceanic island arcs have been compiled to assess the nature and …

The tectonic environment of formation of volcanogenic massive sulphide deposits and
porphyry tin and copper deposits can be identified from the geochemical characteristics of …

Depletion of Nb relative to K and La is characteristic of lavas in subduction-related magmatic
arcs, as distinct from mid-ocean ridge basalts. Nb depletion is also characteristic of the …

Models to explain the petrogenesis of basic and ultrabasic rocks are simple compared to
those required to explain the petrogenesis of the intermediate and silicic rocks discussed in …