Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Derek Vance"'
Autor:
Luana Morais, Bernardo T. Freitas, Thomas Rich Fairchild, Rolando Esteban Clavijo Arcos, Marcel Guillong, Derek Vance, Marcelo Da Roz de Campos, Marly Babinski, Luiz Gustavo Pereira, Juliana M. Leme, Paulo C. Boggiani, Gabriel L. Osés, Isaac D. Rudnitzki, Douglas Galante, Fabio Rodrigues, Ricardo I. F. Trindade
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-18 (2024)
Abstract The Ediacaran-Cambrian transition documents a critical stage in the diversification of animals. The global fossil record documents the appearance of cloudinomorphs and other shelled tubular organisms followed by non-biomineralized small carb
Externí odkaz:
https://doaj.org/article/e5df6b148064459e8445be562a937472
Publikováno v:
Swiss Journal of Geosciences, Vol 116, Iss 1, Pp 1-17 (2023)
Abstract Iron is extremely insoluble in oxic seawater. The lack of a large aqueous reservoir means that sediments rich in authigenic iron are rare in the modern ocean. In the Middle Jurassic, however, condensed iron-rich sedimentary rocks are widely
Externí odkaz:
https://doaj.org/article/bedc36d86b5549549c8e3161b91865a7
Autor:
Matthew O. Clarkson, Timothy M. Lenton, Morten B. Andersen, Marie-Laure Bagard, Alexander J. Dickson, Derek Vance
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
The expansion of oceanic anoxia during the Paleocene Eocene Thermal Maximum has important implications for faunal turnover patterns and global biogeochemical cycles. Here the authors use uranium isotopes and a biogeochemical model to suggest that the
Externí odkaz:
https://doaj.org/article/4a89ec55652744fea99acd987ff99277
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
Earth’s carbon cycle and oceanic magnesium cycle are controlled by processes such as weathering, volcanism and precipitation of carbonates, such as dolomite. Here, the authors contradict the view that modern dolomite formation is rare and suggest i
Externí odkaz:
https://doaj.org/article/5bd1046a68be40d681c47a2db39adb32
Publikováno v:
Geosciences, Vol 9, Iss 8, p 325 (2019)
The cycling of copper (Cu) and its isotopes in the modern ocean is controlled by the interplay of biology, redox settings, and organic complexation. To help build a robust understanding of Cu cycling in the modern ocean and investigate the potential
Externí odkaz:
https://doaj.org/article/3985511fbdf7469f97b63fbe5c7ea8f4
Autor:
Jianghui Du, Derek Vance
Rare Earth Elements (REE) are among the key tracers in modern chemical oceanography. Yet their budgetary imbalance in the modern ocean has limited our understanding of their marine biogeochemical cycling and their applications as paleo-proxies. The f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa65d1575d87b2dc0a3a753d3e49ce23
https://doi.org/10.5194/egusphere-egu23-7079
https://doi.org/10.5194/egusphere-egu23-7079
Recent studies of seawater compositions of some ‘non-traditional’ stable isotope systems, such as 26Mg/24Mg (reported as δ26Mg), have uncovered great potential to enhance our understanding of the past Earth. However, differences between existing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0314996b341684c51217105c2fd69285
https://doi.org/10.5194/egusphere-egu23-4034
https://doi.org/10.5194/egusphere-egu23-4034
Publikováno v:
Geobiology, 21 (3)
Nickel and zinc are both bio-essential micronutrients with a nutrient-like distribution in the modern ocean, but show key differences in their biological functions and geochemical behavior. Eukaryotic phytoplankton, and especially diatoms, have high
Autor:
Derek Vance, Morten B. Andersen, Tim C. Sweere, Zhiwei He, Matthew O Clarkson, Alex Guthauser, Fang Huang, Corey Archer, Peter Kraal
Publikováno v:
Geochimica et Cosmochimica Acta, 309
The abundances and isotope compositions of molybdenum (Mo) and uranium (U) in ancient sediments are promising tracers of the redox state of the past ocean, whose basis lies in the environmentally dependent Mo and U isotope signatures in modern oceani
Publikováno v:
Geostandards and Geoanalytical Research, 45 (4)
Rapid advances in multi-collector inductively coupled plasma-mass spectrometry have made the routine, precise and accurate measurement of metal stable isotope ratios feasible, providing an opportunity to investigate past and present geochemical proce