In some cases, dolomitization
is restricted to allochems (Fig.
Diagenetic products such as micritization, cementation, chemical compaction and dolomitization
were observed in the formation and point toward the role of groundwater and meteoric water during the burial of sediments.
Deposition, diagenesis and dolomitization
of Neogene Seroe Domi Formation coral reef limestones on Curacao, Netherlands Antilles: Foundation for Scientific Research in the Caribbean Region.
The ooid grains feature diagenetic replacive dolomitization
and dissolution vugs.
8b), and (3) transformation of minerals from the clay fraction into hematite during early diagenesis preceding dolomitization
. The presence of pyrite, sphalerite, and siderite (in small amounts) in carbonate rocks is also supported by the absence of [Fe.sub.2][O.sub.3total]-FeO correlation in carbonate rocks (Fig.
However, heterogeneities in the substrate, made by bioturbating infauna, may play a more important role in dolomitization
than has been previously considered.
It is possible that the silica was derived from the host rock during early diagenesis late in the Permian Period, however, this is difficult to ascertain because of the extensive dolomitization
of the rock body.
In the Lisheen area the Waulsortian has been affected by both regional and hydrothermal dolomitization
which obscures many of the original sedimentary features.
This interpretation is based on isotope data , which shows slight shifts in [delta][sup.18]O relative to dolomite, elevated fluid inclusion temperatures of dedolomite [19, 28], and the absence of any signs of meteoric exposure after initial dolomitization
Kiipli (1983) noted a link between the dolomitization
of the Pae Member (and occasionally lithologies below and above) and fracture zones.
and Limestone Diagenesis: a symposium.
The OS layers have only locally slightly changed in the diagenetic processes, whereas the barren limestone interlayers are strongly enriched with MgO and depleted of CaO that is caused by diagenetic dolomitization