They showed that the mafic volcanic rocks in the inferred younger package are within-plate tholeiite
, and attributed them to a backarc basin associated with a volcanic arc of similar age in the Stirling belt of the now-adjacent Avalonian Mira terrane.
1982: Petrogenesis of the island arc tholeiite
series of the South Sandwich Islands.
The lavas from West Valley are diverse chemically, ranging from alkalipoor olivine-hypersthene tholeiites
to near nepheline-normative tholeiite
at Southwest Seamount (Fig.
1989) Geological setting, petrology and geochemistry of Cambrian boninite and low-Ti tholeiite
lavas in western Tasmania.
A large Early Mesozoic quartz tholeiite
dyke has been mapped discontinuously for 190 km in southern coastal Maine, USA.
The sills are well differentiated and have a bulk composition of olivine tholeiite
(Hriskevich 1968; Jambor 1971b); some gabbroic dikes are also present (Andrews et al.
The area lies in the upper extremity of Indian Plate in typical ophiolites mACopyrightlange zone of ocean floor slicing indicated by the presence of green schist as remnant of the pre-existing basalts and tholeiite
and subordinate serpentinites of the ocean lithosphere (Haqqani and Ahmaduddin2006).
Although the geochemical data supported an ocean-floor tholeiite
association, however, the higher concentrations of [K.
8a) of Pearce, (1996), and as tholeiite
on TiO2 versus Zr/ (P2O5*104) (Fig.
9f) most mafic rocks from all plutons plot in the continental tholeiite