The lower part of the WT Complex is mainly composed of amphibolite facies peridotites, oceanic tholeiite
, cherts, BIF (banded iron formation), sandstones, shales, calc-silicate rocks, siltstones, and minor limestones [29, 30].
Experimental melting of hydrous low-K tholeiite
: evidence on the origin of Archean craton.
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.
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.
Flood basalt provinces are typically derived from fissure eruptions that produce large volumes of tholeiite
over brief time spans, with fluid pahoehoe-type lavas that can flow for great distances (Self 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).
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
olivine clinopyroxene plgeonlte orthopyroxene amphibole biotite magnetite plagioclase alkali feldspar quartz medium-K calc alkaline olivine clinopyroxene plgeonlte orthopyroxene amphibole biotite magnetite plagioclase alkali feldspar quartz high-K calc alkaline olivine clinopyroxene pigeonite orthopyroxene amphibole biotite magnetite plagioclase alkali feldspar quartz Table 2.