Trondhjemite
A rock subtype
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Name:
Its name, given by Goldschmidt in 1916, is derived from Trondhjem, Norway.
A light-colored plutonic rock composed primarily of sodic plagioclase (esp. oligoclase), quartz, sparse biotite, and little or no alkali feldspar.
Also spelled: trondjemite; trondheimite.
Ref: AGI
A leucotonalite whose plagioclase is oligoclase or andesine, quartz is at least 20% of the leucocratic minerals, and the alkali feldspar must comprise no more than 10% of the total feldspars. Color index must be 10 or less.
Depending on the mafic content the trondhjemite field ranges from:
18-60% quartz
36-80% plagioclase (oligoclase)
up to 10% K feldspar or albite (usually the latter)
<10 % dark minerals (amphiboles, pyroxenes, biotite)
Also spelled: trondjemite; trondheimite.
Ref: AGI
A leucotonalite whose plagioclase is oligoclase or andesine, quartz is at least 20% of the leucocratic minerals, and the alkali feldspar must comprise no more than 10% of the total feldspars. Color index must be 10 or less.
Depending on the mafic content the trondhjemite field ranges from:
18-60% quartz
36-80% plagioclase (oligoclase)
up to 10% K feldspar or albite (usually the latter)
<10 % dark minerals (amphiboles, pyroxenes, biotite)
Unique Identifiers
Mindat ID:
51928
Long-form identifier:
mindat:1:1:51928:5
Classification of Trondhjemite
Trondhjemite, like other tonalites, is in section 5 of the QAPF diagram.
Synonyms of Trondhjemite
Internet Links for Trondhjemite
mindat.org URL:
https://www.mindat.org/min-51928.html
Please feel free to link to this page.
Please feel free to link to this page.
References for Trondhjemite
Localities for Trondhjemite
Showing 62 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Antarctica | |
| Secretariat of the Antarctic Treaty (2014) |
Argentina | |
| López de Azarevich et al. (2021) |
| López de Azarevich et al. (2021) |
Australia | |
| Degeling (1982) |
| Babo et al. (2017) |
| Simon (2019) |
| Kreuzer et al. (2025) |
Brazil | |
| Soares et al. (2025) |
| Lobato et al. (2015) |
| Fernandes et al. (2023) |
Canada | |
| Personal correspondance with Giles Peatfield (see comments in description) |
| Dunning et al. (1985) |
| Conliffe et al. (2025) | |
| Sandeman et al. (2023) | |
| Azevedo et al. (2022) |
| Bath (1990) |
| Neyedley et al. (2026) |
| Neyedley et al. (2026) | |
China | |
| Li et al. (2022) |
| Lan et al. (2024) |
| Wei et al. (2024) |
| Huang et al. (2024) | |
| You et al. (2024) |
| Li et al. (2022) |
| Zhao et al. (2026) |
| Li et al. (2025) |
| Yuan et al. (2025) | |
| Zhang et al. (2025) | |
| Chen et al. (2024) |
Cuba | |
| Cárdenas-Párraga et al. (2010) +1 other reference |
Egypt | |
| Zoheir et al. (2022) |
Eurasian Plate | |
| Gao et al. (2026) |
Finland | |
| Mikkola et al. (2011) |
France | |
| Barrière et al. (1985) |
Greenland | |
| Whyatt +5 other references |
India | |
| Raju et al. (2025) |
| Jonnalagadda et al. (2022) |
| Sarkar et al. (1996) |
Italy | |
| Pedroni et al. (1996) |
| Bortolotti et al. (1995) +1 other reference | |
Mauritania | |
| Lenaz et al. (2018) |
New Zealand | |
| Mossman (1973) |
| Watters (1978) |
Norway | |
| Geological Survey of Norway. The Ore ... |
| Geological Survey of Norway. The Ore ... | |
| Strmic Palinkas et al. (2024) |
| Amaliksen (1980) |
| Amaliksen (1980) | |
| Amaliksen (1980) | |
| Strmić Palinkaš et al. (2024) | |
Pakistan | |
| Rolfo et al. (1997) |
Philippines | |
| Giese et al. (1986) |
Russia | |
| Balagansky et al. (2015) |
| Balagansky et al. (2015) | |
| Smol’kin et al. (2023) | |
South Africa | |
| Netshidzivhe et al. (2025) |
| Mutele et al. (2025) |
USA | |
| Thakurta (2008) |
| - (2005) |
| Puffer et al. (1992) |
| MacDonald Jr et al. (2022) |
Venezuela | |
| Padoan et al. (2014) |
