| Article |
|---|
| Article name |
Organogenic Carbonate Producers of Precambrian and Phanerozoic of Transbaikalia |
| Authors |
Sinitsa S.M. Doctor of Geology and Minerology, Associate Professor, sinitsa-sm@rambler.ruVil’mova E.S. Candidate of Geology and Mineralogy, Associate Professor, udokania@mail.ruVil’mova E.S. Assistant Lecturer, zvezdochka_kiss_@mail.ru |
| Bibliographic description |
SinitsaS. M., Vil\'movaEl. S., Vil\'movaEk. S.Organogenic Carbonate Producers of Precambrian and Phanerozoic of Transbaikalia // Scholarly Notes of Transbaikal State University. Series Biological sciences. 2018. Vol. 13, No. 1. PP. 78–92. DOI: 10.21209/2500-1701-2018-13-1-78–92. |
| Section |
PALEOBIOLOGY |
| UDK |
568.19(571.55) |
| DOI |
10.21209/2500-1701-2018-13-1-78-92 |
| Article type |
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| Annotation |
Marine and freshwater organogenic carbonates of different ages have been identified in Transbaikalia, both principal and secondary producers have been determined for them. The principal (first) group
of producers creates carbonates as a result of their vital activity, the secondary one – with the accumulation and grouting process of skeletal remains (bioclast). The carbonate producers are the representatives of three kingdoms:Cyanobacteria, Fauna (Zoo) (animals) and Flora (Phyta) (plants).The principal
producers of organogenic carbonates of Precambrian Transbaikalia are Cyanobacteria, which form
such autochthonous structures as stromatolites and oncolites. In the Riphean, along with cyanobacteria,
the producers of carbonates are Udokanii that are conventionally referred to as soft cnidarians and represented mainly in the form of a bioclast of colonies (segmented types of skeletons). From the Cambrian
onwards, in the Paleozoic, archaeocyatha, cnidarians, mollusks, arthropods, bryozoans, brachiopods,
the most part of which is presented in the carbonates in the form of bioclast, have become the producers
of organogenic carbonates. There are 6 types of skeletons, which differ in their ability to resist the destruction: covered shells (corals, trilobites), segmental (red algae, archaeocyatha, Udokania, crinoids),
branching (corals, bryozoans), chambered (myarians, gastropods, foraminifers, crustaceans, brachiopods, echinoderms), crusted (cyanobacteria, algae, corals, bryozoans) and massive ones (cyanobacteria, cnidarians, some kind of bryozoans). The feature of the Paleozoic carbonates of Transbaikalia is the
presence of specific limestone-encrinites consisting of the segments of crinoid columns (segmented
group of skeletons). The marine Mesozoic of Transbaikalia is characterized by a slight carbonate formation. In burial places, bioclasts of bivalves predominate in a diffuse or lenticular form with rare gastropods (chamber group of skeletons) confined to terrigenous rocks. Molluscs (myarians and gastropods)
and ostracods (chambered group of skeletons) have become the producers of organogenic carbonates
in the continental deposits of the Mesozoic in the region.
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| Key words |
producers, organogenic carbonates, cyanobacteria, Udokania, archaeocyatha, cnidarians, mollusks, arthropods, bryozoans, brachiopods, types of skeletons |
| Article information |
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| References |
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