MgCO₃ contents, structure, and carbon and oxygen isotope compositions of fibrous crystals in a Miocene methane seep carbonate
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2023
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| _version_ | 1867170479013363712 |
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| author | Lu, Yang Paulmann, Carsten Mihailova, Boriana Malcherek, Thomas Birgel, Daniel López Correa, Matthias Lin, Zhiyong Lu, Liuyi Milker, Yvonne Peckmann, Jörn |
| author_facet | Lu, Yang Paulmann, Carsten Mihailova, Boriana Malcherek, Thomas Birgel, Daniel López Correa, Matthias Lin, Zhiyong Lu, Liuyi Milker, Yvonne Peckmann, Jörn |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Primary fibrous dolomite has been reported in cavity systems in Neoproterozoic reefal and platformal carbonates. It is surprising to find fibrous dolomite in Miocene methane seep carbonates from Marmorito, northwest Italy. To study the formation of the fibrous crystals, we selected points of interest and measured the main compositions, MgCO₃ contents, structure and carbon and oxygen isotope compositions in 2021. Main compositions were analysed by energy-dispersive X-ray spectroscopy equipped with a scanning electron microscope. The MgCO₃ contents were obtained from Raman spectroscopy and electron probe microanalysis. Structures of the fibrous crystals were measured by synchrotron X-ray diffraction. Carbon and oxygen isotope compositions were determined by a gas isotope ratio mass spectrometer. The results suggest that the fibrous crystals in the Marmorito seep carbonates were directly formed from pore water dominated by sulphate-driven anaerobic oxidation of methane. Their formation conditions help to constrain the formation conditions of the Neoproterozoic counterparts. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_963595 |
| institution | PANGAEA |
| language | en |
| publishDate | 2023 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | MgCO₃ contents, structure, and carbon and oxygen isotope compositions of fibrous crystals in a Miocene methane seep carbonate Lu, Yang Paulmann, Carsten Mihailova, Boriana Malcherek, Thomas Birgel, Daniel López Correa, Matthias Lin, Zhiyong Lu, Liuyi Milker, Yvonne Peckmann, Jörn carbonate cement; Fibrous dolomite; methane seep; Miocene; SD-AOM Primary fibrous dolomite has been reported in cavity systems in Neoproterozoic reefal and platformal carbonates. It is surprising to find fibrous dolomite in Miocene methane seep carbonates from Marmorito, northwest Italy. To study the formation of the fibrous crystals, we selected points of interest and measured the main compositions, MgCO₃ contents, structure and carbon and oxygen isotope compositions in 2021. Main compositions were analysed by energy-dispersive X-ray spectroscopy equipped with a scanning electron microscope. The MgCO₃ contents were obtained from Raman spectroscopy and electron probe microanalysis. Structures of the fibrous crystals were measured by synchrotron X-ray diffraction. Carbon and oxygen isotope compositions were determined by a gas isotope ratio mass spectrometer. The results suggest that the fibrous crystals in the Marmorito seep carbonates were directly formed from pore water dominated by sulphate-driven anaerobic oxidation of methane. Their formation conditions help to constrain the formation conditions of the Neoproterozoic counterparts. |
| title | MgCO₃ contents, structure, and carbon and oxygen isotope compositions of fibrous crystals in a Miocene methane seep carbonate |
| topic | carbonate cement; Fibrous dolomite; methane seep; Miocene; SD-AOM |
| url | https://doi.org/10.1594/PANGAEA.963595 |