Definitions for diagenesis
ˌdaɪ əˈdʒɛn ə sɪsdi·a·ge·n·e·sis

WiktionaryRate this definition:0.0 / 0 votes

1. diagenesisnoun

   All the chemical, physical, and biological changes sediment goes through during and after lithification, not including weathering or other surface changes.

WikipediaRate this definition:0.0 / 0 votes

1. Diagenesis

   Diagenesis () is the process that describes physical and chemical changes in sediments first caused by water-rock interactions, microbial activity, and compaction after their deposition. Increased pressure and temperature only start to play a role as sediments become buried much deeper in the Earth's crust. In the early stages, the transformation of poorly consolidated sediments into sedimentary rock (lithification) is simply accompanied by a reduction in porosity and water expulsion (clay sediments), while their main mineralogical assemblages remain unaltered. As the rock is carried deeper by further deposition above, its organic content is progressively transformed into kerogens and bitumens. The process of diagenesis excludes surface alteration (weathering) and deep metamorphism. There is no sharp boundary between diagenesis and metamorphism, but the latter occurs at higher temperatures and pressures. Hydrothermal solutions, meteoric groundwater, rock porosity, permeability, dissolution/precipitation reactions, and time are all influential factors. After deposition, sediments are compacted as they are buried beneath successive layers of sediment and cemented by minerals that precipitate from solution. Grains of sediment, rock fragments and fossils can be replaced by other minerals (e.g., calcite, siderite, pyrite, marcasite...) during diagenesis. Porosity usually decreases during diagenesis, except in rare cases such as dissolution of minerals and dolomitization. The study of diagenesis in rocks is used to understand the geologic history they have undergone and the nature and type of fluids that have circulated through them. From a commercial standpoint, such studies aid in assessing the likelihood of finding various economically viable mineral and hydrocarbon deposits. The process of diagenesis is also important in the decomposition of bone tissue.

WikidataRate this definition:0.0 / 0 votes

1. Diagenesis

   Diagenesis is changes to sediment or sedimentary rocks during and after rock formation, at temperatures and pressures less than that required for the formation of metamorphic rocks or melting. It does not include changes from weathering. It is any chemical, physical, or biological change undergone by a sediment after its initial deposition and during and after its lithification, exclusive of surface alteration and metamorphism. These changes happen at relatively low temperatures and pressures and result in changes to the rock's original mineralogy and texture. There is no sharp boundary between diagenesis and metamorphism, but the latter occurs at higher temperature and pressure than the former. After deposition, sediments are compacted as they are buried beneath successive layers of sediment and cemented by minerals that precipitate from solution. Grains of sediment, rock fragments and fossils can be replaced by other minerals during diagenesis. Porosity usually decreases during diagenesis, except in rare cases such as dissolution of minerals and dolomitization. The study of diagenesis in rocks is used to understand the tectonic history they have undergone; the nature and type of fluids that have circulated through them. From a commercial standpoint, such studies aid in assessing the likelihood of finding various economically viable mineral and hydrocarbon deposits.

How to pronounce diagenesis?

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How to say diagenesis in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of diagenesis in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of diagenesis in Pythagorean Numerology is: 2

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Diagenesis
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Diagenesis
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=diagenesis