By using the Irvine and Baragar (1971) boundary line, it is clear that the samples have a subalkaline
affinity (Figure 3b).
The dolerite sills that intruded Silurian shales in the Baltic Sedimentary Basin are fractionated subalkaline
rocks of within-plate affinity, as is also clear from their setting in a continental basin.
Nevertheless, the presence of these minerals in subalkaline
series is not an uncommon phenomenon.
Geochemistry of subalkaline
and alkaline extrusives from the Kermanshah ophiolite, Zagros Suture Zone, western Iran: implications on Tethyan plate tectonics.
Also shown are the boundaries between alkaline and subalkaline
rock series (after Irvine and Baragar, 1971; Miyashiro, 1978), and Hawaiian alkaline and tholeiitic rock series (after McDonald and Katsura, 1964).
Magmatic affinity of modern and ancient subalkaline
volcanic rocks determined from trace-element discriminant diagrams.
basalts to basaltic trachyandesite (Ulrych et al.
1981): On curved laminae, graded layers, convection currents and dynamic cristal sorting in the Ploumanacyh (Brittany) subalkaline
2]O indicate that granitic rocks from the Gollon--Callangate Batholith are calc alkaline, subalkaline
and mainly have high K content.
The studied rocks, as well as those from the Ipala Graben (Carr, 1974) and Cinotepeque range (Rapprich & Hradecky, 2005), are of subalkaline
character, following the Calc-alkaline trend, which corresponds to the relatively low Fe content (Fig.
Geochemically, the rapakivi granites from stocks and from the Riga batholith are subalkaline
The closest analogue of the rock on Earth," according to one of the Phobos mission teams, "has been found to be subalkaline
basalt occurring on oceanic seabeds.