Results 81 to 90 of about 2,801 (218)

Assessment of Seawater Nd Isotope Signatures Extracted From Foraminiferal Shells and Authigenic Phases From Volcanogenic Sediments of the Adriatic Sea

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract The neodymium isotope signatures (εNd) of the authigenic fraction have been extensively used to reconstruct past seawater εNd and hydrological circulation. Among the various methods, sequential extraction of hydrogenic ferromanganese oxyhydroxides from bulk sediments represents a rapid and straightforward approach that may potentially induce ...
Guohui Gao, Christophe Colin, Giuseppe Siani, Sophie Sepulcre, Rosella Pinna‐Jamme, Frederic Haurine, Arnaud Dapoigny   +6 more
wiley   +1 more source

Palladium, platinum, and gold distribution in serpentinite seamounts in the Mariana and Izu-Bonin forearcs: evidence from Leg 125 fluids and serpentinites

, 1992
Palladium, platinum, and gold were analyzed for 20 interstitial water samples from Leg 125. No Pd or Pt was detected in fluids from serpentinite muds from Conical Seamount in the Mariana forearc, indicating that low-temperature seawater-peridotite ...
Hall, G. E. M., Parkinson, I. J., Pearce, J. A.   +2 more
core   +2 more sources

Characterization of metalliferous sediment from a low-temperature hydrothermal environment on the Eastern Flank of the East Pacific Rise [PDF]

, 2008
Metalliferous deposits are described from the eastern flank of the East Pacific Rise (EPR) offshore Costa Rica, close to a basaltic seamount called “Dorado high”.
Adatte, Thierry, Bodeï, S., Buatier, M., Steinmann, M., Wheat, C. G.   +4 more
core   +4 more sources

The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: I. Compact Versus Channel Structures

Journal of Raman Spectroscopy, Volume 56, Issue 1, Page 95-112, January 2025.
Mn oxides are important geomaterials widely used in various technological applications. In this work, we present our results on the behaviour of the most common Mn oxides having compact and channel structures during laser irradiation. We show that the spinel structure of hausmannite is the final degradation product of all these compounds.
Simone Bernardini, Giancarlo Della Ventura, Boriana Mihailova, Armida Sodo   +3 more
wiley   +1 more source

Microbially Enhanced Growth and Metal Capture by Ferromanganese Concretions in a Laboratory Experiment

Geobiology, Volume 23, Issue 1, January/February 2025.
ABSTRACT The growth and metal enrichment of ferromanganese minerals on the seafloor have intrigued many studies, yet the role of microbes in the process has remained elusive. Here, we assessed the microbial influence on the growth and trace metal accumulation and release of ferromanganese concretions from the Baltic Sea using 12‐week microcosm ...
Renata Majamäki, Joonas Wasiljeff, Lotta Purkamo, Jenni Hultman, Eero Asmala, Pirjo Yli‐Hemminki, Kirsten S. Jørgensen, Karoliina Koho, Jukka Kuva, Joonas J. Virtasalo   +9 more
wiley   +1 more source

Environmental Geochemical Behavior of Soil Ferromanganese Nodules: A Review

Yankuang ceshi
Ferromanganese nodules (FMNs), secondary products of pedogenic processes, are extensively distributed in karst regions characterized by high geochemical backgrounds and are central to explaining the apparent paradox of high total concentrations but low ...
Mingxin LIU, Jianxun QIN, Kun LIN, Qifeng TANG, Qingye HOU, Zhongfang YANG, Tao YU   +6 more
doaj   +1 more source

Crystal structure of Ni-sorbed synthetic vernadite: A powder X-ray diffraction study [PDF]

, 2008
International audienceVernadite is a nanocrystalline turbostratic phyllomanganate ubiquitous in the environment, which contains nickel in specific settings such as oceanic sediments.
Grangeon, Sylvain, Lanson, Bruno, Lanson, Martine, Manceau, Alain   +3 more
core   +2 more sources

Seawater Lead Isotopes Record Early Miocene to Modern Circulation Dynamics in the Pacific Sector of the Southern Ocean

Paleoceanography and Paleoclimatology, Volume 39, Issue 12, December 2024.
Abstract The Antarctic Circumpolar Current (ACC) is Earth's largest current flowing around Antarctica at all depths and connecting major ocean basins, thus representing an important component of Earth's climate. However, the timing and key controls determining ACC flow path and its strength as a function of past climatic boundary conditions that ...
Huang Huang, Marcus Gutjahr, Zhaoyang Song, Jan Fietzke, Martin Frank, Gerhard Kuhn, Claus Dieter Hillenbrand, Marcus Christl, Dieter Garbe‐Schönberg, Tyler Goepfert, Anton Eisenhauer   +10 more
wiley   +1 more source

Asian Pacific Marine Minerals and Industry Structure [PDF]

Eventual development of marine minerals potential in the Asian Pacific would likely draw on the technology, skills, and experience of the emerging international seabed mining industry.
Broadus, J.M.
core   +1 more source

Lead isotope provinciality of central North Pacific Deep Water over the Cenozoic [PDF]

, 2013
Understanding the pre-anthropogenic Pb cycle of central North Pacific deep water has attracted a lot of attention in recent years, partly because of its unique geographical location in that it is a remote gyre system characterized by high dust fluxes ...
Abouchami, Abouchami, Basak, Bayon, Blanckenburg, Blanckenburg, Chadwick, Christensen, Chu, Conrad, David, Ferrat, Flierdt, Flierdt, Flierdt, Frank, Frank, Frank, Frank, Godfrey, Gutjahr, Hall, Henderson, Henderson, Heydt, Hong-Fei Ling, Hu, Huber, Huber, Huber, Jicha, Jones, Jones, Kaiho, Kawabe, Klemm, Klemm, Kylander, Kyte, Ling, Ling, Lyle, Martin Frank, Meynadier, Nakai, Nielsen, Peate, Pettke, Prueher, Rong Hu, Schaule, Shao-Yong Jiang, Sims, Straub, Taran, Thiagarajan, Tian-Yu Chen, Weber, Willenbring, Wu   +59 more
core   +1 more source