tonalite-trondhjemite-granodiorite

English

Archean TTG rock outcrop in Kongling Complex, South China Craton. The white TTG rock body is intruded by dark mafic dikes, as well as light color felsic dikes. The mafic minerals in the TTG rock body, possibly biotite, were weathered, which introduced a brownish coating on the TTG rock surface.

Etymology

From tonalite +‎ trondhjemite +‎ granodiorite.

Pronunciation

• IPA^(key): /ˈtoʊnəlaɪt ˈtrɒn(d)jəmaɪt ˌɡrænəʊˈdaɪəraɪt/

Noun

tonalite-trondhjemite-granodiorite (uncountable, abbreviation TTG)

1. (mineralogy) A group of silica-rich intrusive igneous rocks that mainly formed in Earth’s early history. They are considered some of the primary building blocks of the oldest continental crust and are typically produced by partial melting of hydrated basalt deep in the crust or mantle.

Translations

group of intrusive rocks with typical granitic composition containing a small portion of potassium feldspar

• French: tonalite-trondhjémite-granodiorite m
• Portuguese: tonalito-trondhjemito-granodiorito m
• Spanish: tonalita-trondhjemita-granodiorita m