Influence of local sedimentary conditions on development of microbialites in the Oxfordian carbonate buildups from the southern part of the Krak贸w-Cz臋stochowa Upland (South Poland)
- 作者：Jacek Matyszkiewicz jamat@geol.agh.edu.pl ; Alicja Kochman ; kochman@geol.agh.edu.pl ; Agnieszka Du艣 apicheta@agh.edu.pl
- 关键词：Microbialites ; Carbonate buildups ; Nutrients ; Rare earth elements ; Palaeoenvironment ; Oxfordian
- 刊名：Sedimentary Geology
- 出版年：2012
- 期刊代码：81_00370738
- 类别：ear
- 出版时间：1 July, 2012
- 卷：263-264
- 期：Complete
- 页码：109-132
- 文件大小：10230 K
摘要
During the Late Jurassic, the Krak贸w-Cz臋stochowa Upland area was situated on a shelf that linked a shallow epicontinental basin with the Tethys Ocean. Locally, carbonate buildups of differentiated size and structure developed on this shelf. The buildups comprise different varieties of microbialites: leiolites, thrombolites and stromatolites of variable properties. Negative Ce anomalies and distinct enrichment in heavy rare earth elements present in all studied microbialites indicate that on the entire Late Jurassic shelf in the Krak贸w region the sea water was generally well oxygenated and comparable, as far as alkalinity is concerned, to the recent one. Differentiated development of microbialites was controlled by local sedimentary conditions, unrelated to distinct changes of sea water chemistry. It is likely that formation of microbialites was mainly dependent on the content of dissolved amino acids, colloidal organic matter or fine-grained nutrient suspension and the energy of sedimentary environment.