Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica
نویسندگان
چکیده
منابع مشابه
Introduction to geochemistry of metalliferous black shales
Metalliferous black shales exhibit a wide range of physical and chemical characteristics. They can be enriched in many different metals, and the metals can be in a variety of geochemical states. Depositional and geological histories of these shales are diverse. Some metalliferous black shales contain relatively high concentrations of organic matter whereas others do not. Because of elevated car...
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Synthetic (e.g. urea) and organic fertilizers (e.g. compost) differed markedly in N isotope composition and the greater the difference between organic and synthetic fertilizer the more robust will be the differentiation of crops and vegetable grown under different farming systems. The objective of this study was to compare nitrogen and carbon isotope composition of organic fertilizers and manur...
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Dissolved organic carbon and nitrogen (DOC and DON) concentrations were measured in the Black Sea during May–June 2001. Sampling was conducted along a Shelf–Gyre transect, and was focused at the suboxic–anoxic interface at the deep stations; hypotheses were tested regarding trends in these variables across the transect and between sub-surface water layers. DOC and DON concentrations were higher...
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Many negative δ(13)C excursions in marine carbonates from the geological record are interpreted to record significant biogeochemical events in early Earth history. The assumption that no post-depositional processes can simultaneously alter carbonate and organic δ(13)C values towards more negative values is the cornerstone of this approach. However, the effects of post-depositional alteration on...
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This paper (SPE 134583) was accepted for presentation at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 20–22 September 2010, and revised for publication. Original manuscript received for review 28 June 2010. Revised manuscript received for review 28 September 2010. Paper peer approved 5 October 2010. Summary This paper presents an experimental study on the ability of orga...
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ژورنال
عنوان ژورنال: Estonian Journal of Earth Sciences
سال: 2023
ISSN: ['1736-7913', '1406-0132', '1736-7557', '1736-4728']
DOI: https://doi.org/10.3176/earth.2023.25