-
Trondhjemite is a
leucocratic (light-colored)
intrusive igneous rock. It is a
variety of
tonalite in
which the
plagioclase is
mostly in the form of oligoclase...
- Tonalite–
trondhjemite–granodiorite (TTG)
rocks are
intrusive rocks with
typical granitic composition (quartz and feldspar) but
containing only a small...
- 7 Ga. Much of the
granitic rock
belongs to the
distinctive tonalite–
trondhjemite–granodiorite
family of rocks,
which are
characteristic of
Archean continental...
-
contain an
abundance of
Archean felsic volcanic rocks,
including tonalite,
trondhjemite and
granodiorite (TTG)
series rocks,[failed verification] with minor...
- a
complex of
felsic magmatic rocks.
These rocks are
mostly tonalite,
trondhjemite or granodiorite,
types of rock
similar in
composition to
granite (hence...
-
deposits including gold and copper.
Drummond and
Defant noted that
Archean trondhjemites (which make up most of the
ancient crust of continents) have similar...
- 500-million-year time span and can be
divided into two suites: The tonalite-
trondhjemite-granodiorite (TTG)
suite (emplaced
approximately 3.5–3.2 Ga), and the...
-
intruded by a
distinctive group of
granitic rocks called the tonalite-
trondhjemite-granodiorite or TTG suite.
These are the most
voluminous rocks in the...
-
later came to
refer to
quartz monzonite, and is now a
deprecated term.
Trondhjemite is an orthoclase-deficient
variety of sodium-rich
tonalite with minor...
- ISSN 1752-0894. Mutanen, Tapani; Huhma,
Hannu (2003). "The 3.5 Ga
Siurua trondhjemite gneiss in the
Archaean Pudasjärvi
Granulite Belt,
northern Finland" (PDF)...
