anatexis: meaning, definition, pronunciation and examples
C2 (Rare Technical Term)Highly Technical/Scientific
Quick answer
What does “anatexis” mean?
The partial melting of rocks, typically in the deep crust or upper mantle, resulting from high temperature and pressure.
Audio
Pronunciation
Definition
Meaning and Definition
The partial melting of rocks, typically in the deep crust or upper mantle, resulting from high temperature and pressure.
In geology and petrology, it refers specifically to the process where pre-existing solid rock is heated to the point where some of its constituent minerals begin to melt, producing a magma (or migma) while leaving a solid residuum. This is a key process in the formation of granitic magmas and in high-grade metamorphism.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences exist. The term is used identically in both scientific communities.
Connotations
None beyond its precise geological meaning.
Frequency
Extremely rare outside of specialised geological literature in both regions.
Grammar
How to Use “anatexis” in a Sentence
The anatexis of [rock type] produced...[Geological event] led to anatexis.Anatexis occurred under conditions of...Vocabulary
Collocations
Examples
Examples of “anatexis” in a Sentence
verb
British English
- The metapelites began to anatectize under the intense heat and pressure.
- These rocks are unlikely to anatectize under the prevailing conditions.
American English
- The metapelites began to anatectize under the intense heat and pressure.
- These rocks are unlikely to anatectize under the prevailing conditions.
adjective
British English
- The anatectic melt was rich in silica.
- We identified an anatectic origin for the granite.
American English
- The anatectic melt was rich in silica.
- We identified an anatectic origin for the granite.
Usage
Meaning in Context
Business
Never used.
Academic
Exclusively used in advanced geology, petrology, and earth science papers and textbooks.
Everyday
Virtually never used.
Technical
The primary domain of use. Essential for describing high-grade metamorphic and magmatic processes.
Vocabulary
Synonyms of “anatexis”
Strong
Neutral
Weak
Vocabulary
Antonyms of “anatexis”
Watch out
Common Mistakes When Using “anatexis”
- Using 'anatexis' to describe the complete melting of a rock (that is 'fusion' or 'complete melting').
- Pronouncing it with stress on the first syllable (ANatexis) instead of the third (an-a-TEK-sis).
- Using it as a verb ('the rock anatexised') – the verb form 'anatectize' exists but is extremely rare; 'underwent anatexis' is standard.
FAQ
Frequently Asked Questions
Not exactly. Anatexis is one specific mechanism of magma generation, where the magma comes from the partial melting of pre-existing crustal rocks. Magma can also be generated by partial melting of the mantle.
Anatexis is a primary process in the formation of S-type (sedimentary source) granites and migmatites. The melt fraction, if extracted and solidified, typically forms granitic rocks.
No. 'Anatexis' is a highly specialised technical term. It is only necessary for advanced students and professionals in geology and related earth sciences.
They are completely different processes. Diagenesis refers to the physical and chemical changes occurring in sediments at low temperature and pressure after deposition, turning them into sedimentary rock. Anatexis occurs at much higher temperatures and pressures, causing partial melting in already solid rocks (often metamorphic).
The partial melting of rocks, typically in the deep crust or upper mantle, resulting from high temperature and pressure.
Anatexis is usually highly technical/scientific in register.
Anatexis: in British English it is pronounced /ˌænəˈtɛksɪs/, and in American English it is pronounced /ˌænəˈtɛksɪs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of ANAtexis as ANAlysis by melting (TEKsis from the Greek 'teksis' meaning melting). It's analysing a rock by seeing what melts first.
Conceptual Metaphor
N/A (Pure technical term)
Practice
Quiz
Anatexis most specifically refers to: