Information AboutDiagenesis |
| CATEGORIES ABOUT DIAGENESIS | |
| geological processes | |
| fossil fuels | |
| sedimentology | |
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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 Fossil s 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 and, from an economic standpoint, allows the assessment of the likelihood of finding various economic minerals and Hydrocarbon s. THE ROLE OF DIAGENESIS IN HYDROCARBON GENERATION When animal or plant matter is buried during sedimentation, the constituent organic s and Bitumen s. It is generally accepted that hydrocarbons are formed by the thermal alteration of these kerogens (the ''biogenic'' theory). In this way, given certain conditions (which are largely temperature-dependent) kerogens will break down to form hydrocarbons through a chemical process known as Cracking , or Catagenesis . |
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