Tonalite is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic (coarse-grained) texture. Feldspar is present as plagioclase (typically oligoclase or andesine) with alkali feldspar making up less than 10% of the total feldspar content.

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Tonalite–trondhjemite–granodiorite (TTG) rocks are intrusive rocks with typical granitic composition (quartz and feldspar) but containing only a small portion of potassium feldspar. Tonalite, trondhjemite, and granodiorite often occur together in geological records, indicating similar petrogenetic processes. [1]

Tonalite is a type of plutonic igneous rock containing quartz (20 – 60% of the felsic minerals) and abundant plagioclase. K-feldspar is rare or absent in a tonalite and, when present, it constitutes less than 10% of the feldspars.

2023年11月17日 · Tonalite is a type of intrusive igneous rock that belongs to the granodiorite suite of rocks. It is characterized by its composition, which is intermediate between granite and diorite. Tonalite is part of the larger family of plutonic rocks, which means that it forms from the slow cooling and solidification of magma beneath the Earth's surface.

2023年9月7日 · Tonalite is a coarse-grained, light-colored intermediate to mafic plutonic rock with mainly plagioclase, quartz, and minor mafic minerals.

TONALITE - Intrusive igneous, plutonic. Sometimes mistakenly used as synonymous with quartz diorite. The rock contains essential quartz, and plagioclase feldspar, usually andesine, with accessory mafics such as biotite, hornblende, and/ or …

A granitoid (a coarse grained igneous rock with <90% mafics; felsic minerals are composed mostly of quartz (20-60%) and 40-80% feldspars (Kspar (alkali-feldspar) and plagioclase), where plagioclase is >90% of the total feldspar as shown on the QAPF diagram. Tonalite is in section 5 of the QAPF diagram. A petrological term for Pyroxene Group.

2013年9月1日 · Granodiorites and tonalites (Granotonalites in this review paper) form large batholiths at active continental margins and collisional orogens. Although the relation with subduction is obvious, the mechanisms of magma generation remain among the most debated topics in Earth Sciences today.

Tonalite (named by pass Tonale, Adamello massif in Tirol) is a felsic igneous plutonic rock with phaneritic texture and special variety of granodiorite in turn to diorite. From: Introduction to Mineralogy and Petrology , 2014