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- Created 2012-03-13
ˌdaɪəˈdʒɛnəsɪs is changes to
during and after rock formation (
), at temperatures and pressures less than that required for the formation of
or melting. It does not include changes from
. It is any chemical, physical, or biological change undergone by a
after its initial deposition and during and after its lithification, exclusive of surface alteration (
. These changes happen at relatively low temperatures and pressures and result in changes to the rock's original
ogy and texture. There is no sharp boundary between diagenesis and
, but the latter occurs at higher
than the former.
After deposition, sediments are compacted as they are buried beneath successive layers of sediment and cemented by minerals that precipitate from
. Grains of sediment,
s can be replaced by other minerals during diagenesis.
usually decreases during diagenesis, except in rare cases such as
of minerals and
The study of diagenesis in rocks is used to understand the
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
The process of diagenesis is also important in the decomposition of bone tissue.
from Wikipedia (last updated: 18 May), licensed under
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