Microbial dolomite in the sabkha environment of the middle Cambrian in the Tarim Basin, NW China
| Autor: | Jingquan Zhu, C. S. Lin, Xuelian You, Silong Sun |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Sabkha
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Evaporite Dolomite Geochemistry Intertidal zone 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound chemistry Earth and Planetary Sciences (miscellaneous) Period (geology) General Earth and Planetary Sciences Carbonate Sedimentary rock Microbial mat Geology 0105 earth and related environmental sciences |
| Zdroj: | Australian Journal of Earth Sciences. 65:109-120 |
| ISSN: | 1440-0952 0812-0099 |
| DOI: | 10.1080/08120099.2018.1408031 |
| Popis: | In the Tarim Basin, dolomite, which formed during the middle Cambrian associated with evaporites, has been attributed to the sabkha-style dolomite formed during the syndepositional period. The sedimentary microfacies suggests dolomite formation in the middle Cambrian is an ancient analogue of the sabkha of Abu Dhabi. Poorly crystallised dolomite spheroids or ovoids within or on the surface of dolomite crystals are a common phenomenon that can be widely observed in different stromatolites in the upper part of the intertidal zone and strongly resemble the morphology in modern sabkha dolomite-producing microbial mats and in microbial culture experiments. These lines of evidence suggest organic substrates for dolomite nucleation. Dolomite formation in the middle Cambrian in the Tarim Basin has been considered a classic analogue for carbonate and evaporate assemblages. The extent of microbial dolomite in ancient sabkha environments is proposed as an alternative model for dolomite formation, in which th... |
| Databáze: | OpenAIRE |
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