The Meguma terrane is a unique unit of the Northern Appalachians as it only identified in Nova Scotia. It was thrust over Avalon during Early Devonian Acadian Orogeny. and terranes are exotic to North America likely originated along margin Gondwana. precise relationship between uncertain very little known about basement rocks each terrane. Hosted within Late lamprophyric Popes Harbour dyke xeno...

Mesozoic granitic plutons are found throughout the Indochina terrane of eastern Cambodia and southern Vietnam. The rocks range in age from Early Triassic (240 Ma) to Late Cretaceous (80 record distinct tectonomagmatic periods associated with subduction Paleotethys Paleo-Pacific oceans. Samples collected Snoul pluton, composed silicic intermediate dioritic rocks, basalt. quartz diorites magnesia...

Magmatism during the maturation phase of Archean greenstone belts produced voluminous tonalite–trondhjemite–granodiorite (TTG) suites, as well a lesser amount tonalite–trondhjemite–diorite (TTD) suites. Such TTD suites have recently been recognized in Abitibi belt, on southern flank Superior Craton, Canada, but their source(s), differentiation processes, and depths emplacement remain poorly con...

Magmatic zircon tends to present characteristic trends in trace element compositions response magma petrogenesis and metallogenesis, such that may provide a window into melt evolution not accessible by whole rock chemistry. The Yangla large Cu deposit is located the central part of Jinshajiang Suture Zone, southwest China, constrained between Faults. In this study, elements hafnium isotopic zir...

The Paleoproterozoic Näränkävaara layered intrusion, northern Finland, has a surface area of 25 km x 5 and stratigraphic thickness ~3 km. main body the intrusion includes 1.5–2 thick basal dunite series 1.3 peridotitic-dioritic series, latter with two peridotitic reversals related to magma recharge. In addition, poorly known elongate poikilitic harzburgitic intrusions (the peridotites) are foun...

introduction mineral composition is sensitive to variations in the composition of the magma and can be used to characterize the physical conditions of crystallization such as temperature, pressure, oxygen fugacity and water content. the studies have demonstrated that geobarometery by amphibole provides a tool for determining the depth of crystallization and knowledge of the depth of crystalliza...

Lithofacies belonging to mud-flat and palustrine deposits (lake margin) in the Miocene of Madrid Basin (Spain) have been studied. Four lithofacies corresponding mud flat (1 3) (2 4) differentiated. Units 1 3 consist mainly mudstones carbonates (calcretes diolocretes). The clay fraction is dominated by trioctahedral smectite (up 79%) with illite kaolinite as minor components. d(060) spacing valu...