Journal ArticleDOI
Microprobe study of diagenesis in calcareous algae1
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TLDR
In this paper, the diagenesis of calcareous algae was investigated by electron microprobe and the results showed that the highest magnesian values in Recent algae specimens were found to be in high Mg calcites rather than in any other phase.Abstract:
SUMMARY
Initial results of investigation of the diagenesis of calcareous algae by electron microprobe are:
1
A few conceptacles and other cavities in Recent algae specimens are partly to completely filled with younger carbonate In contrast to the surrounding skeleton of about 10–20% mol MgCO3-calcite, these deposits are either very low (0–2%) or very high (15–50%) in MgCO3 content
2
Highest magnesian values in Recent algae studied are thought to be in high-Mg calcites rather than in any other phase, with very few possible exceptions
3
Calcian dolomite replacing fossil algae in cores from Eniwetok Atoll commonly has Ca-rich lenses resembling exsolution laminaeread more
Citations
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Book ChapterDOI
Diagenesis 9. Limestones - The Meteoric Diagenetic Environment
Journal ArticleDOI
The interaction of magnesium with calcite during crystal growth at 25–90°C and one atmosphere
TL;DR: The distribution of Mg2+ between calcite and solution at the entire temperature range is heterogeneous, closely following the Doerner-Hoskins (Doerner and Hoskins, 1925) distribution law.
Book ChapterDOI
The Occurrence and Ecology of Recent Rhodoliths — A Review
TL;DR: Rhodoliths (= rhodolites, Coralline algal nodules) are nodules and unattached branched growths with a nodular form composed principally of coralline algae.
Journal ArticleDOI
Effects of early sea-floor processes on the taphonomy of temperate shelf skeletal carbonate deposits
TL;DR: In this article, it was shown that surface-to-volume ratio and skeletal mineralogy are both important in determining skeletal resistances to dissolution in temperate shelf carbonate sediments.
Journal ArticleDOI
Marine maceration of skeletal carbonates in the Skagerrak, North Sea
TL;DR: The diagenetic regime in the Skagerrak is a complete contrast to the classical warm-sea carbonate regime so extensively studied in areas like the Bahama Banks as mentioned in this paper.
References
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Journal ArticleDOI
Structural and Compositional Variations in Some Natural Dolomites
TL;DR: In this paper, the authors examined sedimentary dolomite concentrates from sedimentary rocks ranging in age from Eocene to Ordovician using powder and single-crystal X-ray methods and found compositional and structural features similar to those of synthetic protodolomites.
Journal ArticleDOI
Some Hydrothermal Syntheses of Dolomite and Protodolomite
TL;DR: The formation of dolomite from a number of metastable carbonate materials has been investigated in this paper, and it has been shown that the necessity of attaining an ordered arrangement of Ca and Mg ions at rapid rates of crystallization is responsible for the difficulty of forming DOLOMITE at low temperatures.
Journal ArticleDOI
Composition of magnesian calcites of algae and pelecypods by electron microprobe analysis1
TL;DR: In this article, a microprobe analysis of skeletal carbonate structures in coralline algae and pelecypods showed that the magnesian content of the calcite depends on skeletal growth rates.
Journal ArticleDOI
Dolomitization of the Mid-Pacific Atolls.
TL;DR: Measurements of oxygen isotopes in samples of dolomite can be interpreted as indicating an origin from evaporated, isotopically-heavy sea water.