greisen: meaning, definition, pronunciation and examples
C2Specialised, Technical
Quick answer
What does “greisen” mean?
A granitic rock type, typically coarse-grained and light-coloured, altered by high-temperature fluids containing fluorine and lithium.
Audio
Pronunciation
Definition
Meaning and Definition
A granitic rock type, typically coarse-grained and light-coloured, altered by high-temperature fluids containing fluorine and lithium.
In geology, a hydrothermally altered granite consisting chiefly of quartz and mica (usually muscovite or lithian mica), from which feldspar has been removed, often associated with tin and tungsten mineralisation.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage or meaning. The term is international geological jargon.
Connotations
None beyond the technical definition.
Frequency
Extremely low in general language. Equal, near-zero frequency in both UK and US specialist literature.
Grammar
How to Use “greisen” in a Sentence
The [ore deposit] occurs within/in greisen.The granite has been altered to greisen.Greisen is associated with [mineral, e.g., cassiterite].Vocabulary
Collocations
Examples
Examples of “greisen” in a Sentence
verb
British English
- The granite was extensively greisened along the contact zone.
- The process that greisens the rock is called greisenization.
American English
- The pluton has been greisened, forming an economic tin deposit.
- Hydrothermal fluids greisen the granite over time.
adverb
British English
- The rock is greisen-altered.
- The deposit is greisen-hosted.
American English
- The granite appears greisenized.
- It's a greisen-style mineralization.
adjective
British English
- The greisen alteration is spatially related to the quartz veins.
- They mapped the greisen pipe in detail.
American English
- Greisen zones are the primary targets for exploration here.
- The greisen core of the intrusion is highly mineralized.
Usage
Meaning in Context
Business
Only in very specific mining/exploration company reports discussing ore deposit types.
Academic
Common in geology, petrology, and economic geology textbooks, papers, and lectures.
Everyday
Virtually never used.
Technical
Core term in hard-rock geology, mineral exploration, and mining engineering when describing certain ore-forming environments.
Vocabulary
Synonyms of “greisen”
Strong
Neutral
Weak
Vocabulary
Antonyms of “greisen”
Watch out
Common Mistakes When Using “greisen”
- Mispronouncing as /ˈɡriːsən/ (gree-sen). Correct is /ˈɡraɪzən/ (grise-en).
- Using it as a general term for any light-coloured rock.
- Confusing it with 'gneiss', a different metamorphic rock.
FAQ
Frequently Asked Questions
No, it is a highly specialised geological term unknown to the general public.
Yes, in technical geology, 'to greisen' or 'to greisenize' means to alter granite into greisen via hydrothermal processes.
It is borrowed from German, where 'Greisen' is a mining term for a type of altered granite, possibly related to 'greis' (hoary, grey-haired), describing its speckled appearance.
Yes. Pegmatite is an exceptionally coarse-grained igneous rock, while greisen is an altered rock. A pegmatite can be altered to become a greisen.
A granitic rock type, typically coarse-grained and light-coloured, altered by high-temperature fluids containing fluorine and lithium.
Greisen is usually specialised, technical in register.
Greisen: in British English it is pronounced /ˈɡraɪzən/, and in American English it is pronounced /ˈɡraɪzən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. Too specialised for idiomatic use.”
Learning
Memory Aids
Mnemonic
Think: 'GRanite' that has been 'EISEN' (a German-sounding suffix for rock) altered – a GREISEN is a specific altered granite rock.
Conceptual Metaphor
None in common usage. In specialist discourse, it might be metaphorically described as the 'rotted' or 'bleached' heart of a granite intrusion.
Practice
Quiz
What is the primary process responsible for forming greisen?