tonalitic


Also found in: Encyclopedia.

tonalitic

(ˌtəʊnəˈlɪtɪk)
adj
relating to or consisting of tonalite
References in periodicals archive ?
The NPIC comprises dykes, bosses and stocks of granitoids emplaced in a foundation of mafic to tonalitic rocks.
1990) the high-grade metamorphic rocks in both the Chuggin Road and Lime Hill units include biotite, bioitite-cordierite, and sillimanite-bearing paragneiss, migmatitic paragneiss, marble, quartzite, amphibolite, and tonalitic orthogneiss.
1996): (i) Archean and Neoproterozoic calcic to calco-alkaline, plutonic orthogneisses, varying in composition from tonalitic to granitic; and (ii) Neoproterozoic metavolcanic-metasedimentary sequences made of metavolcanic rocks ranging in composition from low-K metatholeiites to metarhyolites.
The TTG unit is made up of three rocks types: the tonalitic suite (known as So'o granite), the charnockitic suite and the granodioritic suite massifs (Shang et al, 2004)
This rock unit is characterised by grey foliated Biotite acid/Biotite Hornblende quartz feldspathic gneiss of tonalitic to granodioritic composition [12];Mafic to ultramafic component which outcrops as discontinuous boudinaged lenses or concordant sheet of amplibolites with minor amount of biotite-rich ultramafite; and Felsic component, a varied group comprised of pegmatite, aplite quartz-oligoclase veins, fine-grained granite gneiss, and porphyritic granite.
The edifice of the NRV is built by andesite lava flows emplaced over an igneous and metamorphic country rock of schist from the Cajamarca Complex and tonalitic rocks from the Manizales Stock.
The N- to NW-oriented aeromagnetic trends are superimposed on a background of magnetic lows corresponding to older supracrustal and tonalitic rocks (Fig.
The supracrustal rocks already were deformed, metamorphosed at greenschist/amphibolite transition conditions and intruded by abundant tonalitic stocks and related felsic porphyry dikes by around 2.
A second orogeny in the Late Cretaceous culminated with the discordant intrusion of the tonalitic Antioquian batholith.