phenocrysts (6%) appear unaltered (Figs.
The presence of clinopyroxene
, hastingsite, with or without paragsite, characterizes the intermediate zone, while only clinopyroxene
with minor arfvedsonite were noted in the periphery.
The mafic dykes are porphyritic to aphyric and consist of calcic plagioclase, hornblendic amphibole or clinopyroxene
+/- olivine, ilmenite, titanite and a range of secondary minerals.
Experimental partitioning of high field strength and rare earth elements between clinopyroxene
and garnet in andesitic to tonalitic systems.
crystals are more ehuedral and seems to be early cristallyzation phase, a feature that may be a consequence of the presence of water that commonly suppressed the early crystallization of plagioclase in wet arc magmas (Sisson and Grove, 1993).
The main constituents are recrystallized, equigranular (roughly equal in in size) feldspar, clinopyroxene
, alkali-amphibole, mica, magnetite, zircon and ilmenite, but with a pervasive "overgrown" nature.
In accordance with these observations, a variable proportion of interstitial minerals, including clinopyroxene
2012) Orientation-related electrical con ductivity of hydrous olivine, clinopyroxene
and plagioclase and implications for the structure of the lower continental crust and uppermost mantle.
The minerals of these rocks consists of olivine, clinopyroxene
, orthopyroxene and chrome- spinel that have mesh and granular texture that altered to serpentine minerals and iron-oxid (Fig.
Individual coarse grains of clinopyroxene
and plagioclase in the dyke may be from these clusters, which are often partly disaggregated.
Plagioclase and clinopyroxene
have a sufficiently high hardness on the Mohs scale (6 and 5-5.
The sills contain small pseudomorphs of olivine, plus plagioclase and clinopyroxene