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Definition of diagenesis in English: diagenesisnoun ˌdʌɪəˈdʒɛnɪsɪsˌdaɪəˈdʒɛnəsəs mass nounGeology The physical and chemical changes occurring during the conversion of sediment to sedimentary rock. Example sentencesExamples - These processes, collectively termed sedimentary diagenesis, occur through interactions between sediment grains and the waters in contact with them.
- This article is geared primarily to individuals, students as well as professionals, who are relatively new to carbonate diagenesis and petroleum reservoir rocks.
- This writer has found that many investigations of burial diagenesis, whether of carbonates or of clastics, proceed in six steps that roughly correspond to those in the top half of Figure 15.
- The free carbonate fraction is dominated by calcite that probably precipitated during early diagenesis, in contact with diagenetic pore water.
- Comparisons with the potential source rocks of these sediments suggest little alteration during sediment transport and diagenesis.
Derivatives adjective Geology In response to burial in sedimentary basins, clay minerals in mudrock lithologies, including mudstone, shale and slate, undergo diagenetic and low-grade metamorphic reactions. Example sentencesExamples - Petrographical studies were conducted by examining thin sections in transmitted and reflected light to identify magnetic mineralogy and diagenetic phases.
- The only volumetrically important and widespread diagenetic effect of groundwater flow on carbonates in near-surface evaporitic settings is reflux dolomitization.
- Most microbes live in near-surface or shallow subsurface diagenetic settings where temperatures and pressures are relatively low and nutrients are abundant.
- Metamorphism could be thought of as an extreme form of diagenesis, but diagenetic processes are generally distinguished from metamorphism and are considered in terms of the sedimentary rocks on which they act.
adverb Geology At each sample site, the least diagenetically modified, coarser grained sediments from laminae of dune couplets were selected for analysis. Example sentencesExamples - Under high magnification, lighter patches that can be seen probably correspond with larger crystals or clusters of crystals that have aggraded diagenetically.
- On the other hand, in the grey-pink argillaceous levels, fossils are much more better preserved, although slightly distorted or weakly diagenetically flattened.
- We acknowledge that virtually all Paleozoic calcareous foraminifers are diagenetically altered.
- This record, however, is diagenetically altered in most continental shelf sections and only high frequency temperature trends are generally preserved (Schrag et al. 1995 and references therein).
Definition of diagenesis in US English: diagenesisnounˌdaɪəˈdʒɛnəsəsˌdīəˈjenəsəs Geology The physical and chemical changes occurring during the conversion of sediment to sedimentary rock. Example sentencesExamples - The free carbonate fraction is dominated by calcite that probably precipitated during early diagenesis, in contact with diagenetic pore water.
- These processes, collectively termed sedimentary diagenesis, occur through interactions between sediment grains and the waters in contact with them.
- Comparisons with the potential source rocks of these sediments suggest little alteration during sediment transport and diagenesis.
- This writer has found that many investigations of burial diagenesis, whether of carbonates or of clastics, proceed in six steps that roughly correspond to those in the top half of Figure 15.
- This article is geared primarily to individuals, students as well as professionals, who are relatively new to carbonate diagenesis and petroleum reservoir rocks.
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