Further contamination by crustal Tonalite-Trondhjemite-Granodiorite-like rocks from the Archean, crystal fractionation and magma mixing further up in the crust then yielded the Licancabur magmas.
32.
By contrast, more mafic rocks, such as tonalite, gabbro and diorite, have 1 to 5 ppm uranium, and limestones and sedimentary rocks usually have equally low amounts.
33.
It occurs as argillaceous inclusions in volcanic rocks in the Isle of Mull, inclusions in sillimanite within a tonalite at Val Sissone, Italy and with emerylike rocks in Argyllshire, Scotland.
34.
Granitization of the older sedimentary & ndash; volcogenic sequence are reported as sources of the peninsular gneisses made up of polyphase migmatites, gneisses and granites ranging in composition from granodiorite to tonalite.
35.
The first granitic event in the South Pass area includes tonalite dikes and plugs intruded into shear zones in the South Pass supracrustal rocks along with light-colored, metamorphosed leucodacite porphyry and quartz diorite.
36.
This structure, formed by plutonic rocks including granodiorite and tonalite, is crossed north-south by the Liqui�e-Ofqui fault zone and surrounded by metamorphic rocks west and volcanic rocks east of the batholith.
37.
Overall, the presence of tonalite-trondhjemite-granodiorites, as well as the iron present for the banded iron formations ( BIFs ), are determined to have been caused by hydrothermal alteration at high temperatures.
38.
Often the species of mafic minerals is included in the name, for instance, hornblende-bearing granite, pyroxene tonalite or augite megacrystic monzonite, because the term " granite " already assumes content with feldspar and quartz.
39.
According to the British Antarctic Survey's ( BAS ) aeromagnetic 1975 survey of Astraea Nunatak and nearby Ceres Nunataks, this geographical feature is rich in the igneous rocks Diorite and Tonalite as presumed by the rock samples which were observed by BAS during this survey.
40.
According to the British Antarctic Survey's ( BAS ) aeromagnetic 1975 survey of Ceres Nunataks and nearby Astraea Nunatak, this geographical feature is rich in the igneous rocks Diorite and Tonalite as presumed by the rock samples which were observed by BAS during this survey.
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