Zobrazeno 1 - 10
of 12 406
pro vyhledávání: '"isotope fractionation"'
Autor:
Cotrufo, Francesca, author, Pressler, Yamina, author
Externí odkaz:
https://doi.org/10.1093/oso/9780198854494.001.0001
Publikováno v:
Youqi dizhi yu caishoulu, Vol 31, Iss 4, Pp 154-163 (2024)
Deep source rocks undergo high degrees of evolution， leading to a significant decrease in biomarker content in crude oil as maturity increases. The decrease affects the reliability of the oil source correlation with conventional biomarker parameter
Externí odkaz:
https://doaj.org/article/04b90bdfba9c4d60ba61db92ec47cc95
Autor:
A. J. Dickson, R. G. Hilton, J. Prytulak, D. Minisini, J. S. Eldrett, M. Dellinger, M. Stow, W. Wang
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 25, Iss 10, Pp n/a-n/a (2024)
Abstract Oxidative weathering of organic carbon in sedimentary rocks is a major source of CO2 to the atmosphere over geological timescales, but the size of this emission pathway in Earth's past has not been directly quantified due to a lack of availa
Externí odkaz:
https://doaj.org/article/ca73049de38b46b6a0bcca42546a024b
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
Cold seeps, featured by their extremely methane-rich sedimentary environments, play a significant role in the geological history and are common in marine sediments across the seafloor. Primary dolomite, possibly mediated by microorganisms, can be wid
Externí odkaz:
https://doaj.org/article/9ad3fe4268ea4257a6c98c3362cae15f
Publikováno v:
Frontiers in Earth Science, Vol 12 (2024)
The Yan’an gas field in the Ordos Basin is a typical deep coalbed methane field with tremendous resource potential. Evaluation methods for gas content in deep coal seams are urgently required to be established. This study is aimed at quantitatively
Externí odkaz:
https://doaj.org/article/8035d80b1ab548779f54d3a6e57f3966
Publikováno v:
Ecotoxicology and Environmental Safety, Vol 283, Iss , Pp 116770- (2024)
Isotope technology is an ideal tool for tracing the sources of certain pollutants or providing insights into environmental processes. In recent years, the advent of multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) has enabled
Externí odkaz:
https://doaj.org/article/a91bac1450ee49c2bd3b732c51d5a9b0
Publikováno v:
Guangxi Zhiwu, Vol 44, Iss 3, Pp 576-585 (2024)
Nitrate is predominant in the karst soils. However, the temporal and spatial heterogeneities are observed for the nitrate content in the soils. Hence, the Morus alba seedlings grown in karst regions may suffer from low nitrogen stress. In order to pr
Externí odkaz:
https://doaj.org/article/b2eb14ce18de4f61b4f34782ba755416
Akademický článek
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Publikováno v:
Ecosphere, Vol 15, Iss 8, Pp n/a-n/a (2024)
Abstract Nitrogen isotope analyses of amino acids (δ15N‐AA) are being increasingly used to decipher trophic dynamics. Interpretation of δ15N‐AA in consumers relies on the assumption that consumer physiological status and nutritional status of p
Externí odkaz:
https://doaj.org/article/e2270c9050bc4748bb5cf9f0f2b0817f
Autor:
X. Bian, S.‐C. Yang, R. J. Raad, C. E. Odendahl, N. T. Lanning, M. Sieber, K.‐F. Huang, J. N. Fitzsimmons, T. M. Conway, S. G. John
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 16, Pp n/a-n/a (2024)
Abstract Nickel stable isotopes (δ60Ni) provide insight to Ni biogeochemistry in the modern and past oceans. Here, we present the first Pacific Ocean high‐resolution dissolved Ni concentration and δ60Ni data, from the US GEOTRACES GP15 cruise. As
Externí odkaz:
https://doaj.org/article/d4dea485a3424ba0aaad1358b36467b8