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diagenesis

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.04 sec.

diagenesis

Sum of all processes, chiefly chemical, that produce changes in a sediment after its deposition but before its final lithification. Usually, not all the minerals in a sediment are in chemical equilibrium, so changes in interstitial water composition or in temperature or in both will lead to chemical alteration of one or more of the minerals present. Diagenesis is considered a relatively low-pressure, low-temperature alteration process that involves such processes as cementation, reworking, replacement, crystallization, and leaching.
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Either of the two end-member metallogenic models may apply: oxidizing U-transporting basin fluids reacted with basement graphite to create methane, thus prompting U precipitation during peak diagenesis (Fayek and Kyser 1997); or U-transporting brines percolated deeply in the basement and became part of a protracted series of hydrothermal events (Cuney et al.
Economic geology: then and now by Jebrak, Michel / Geoscience Canada
These compounds are derived from the diagenesis of plant materials (e.
Relationship between composition and toxicity of motor vehicle ... by Mauderly, Joe L. / Environmental Health Perspectives
The dating of ancient bones has been notably unreliable because of diagenesis and isotopic contamination that occur with millennia of environmental exposure.
The remarkable metrological history of radiocarbon dating [II] by Currie, Lloyd A. / Journal of Research of the National Institute of Standards and Technology
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