Natural 226Ra and 232Th radionuclides in xenophyophores of the Pacific Ocean

  title={Natural 226Ra and 232Th radionuclides in xenophyophores of the Pacific Ocean},
  author={Mikhail M Domanov},
  journal={Geochemistry International},
  • M. Domanov
  • Published 7 July 2015
  • Geology
  • Geochemistry International
1 Citations
Some Peculiarities of Foraminifera Species Distribution Associated with Concentrations of 226 Ra, 238U, 232Th in the Deryugin Basin (the Sea of Okhotsk)
An analysis of composition and quantitative distribution of foraminifera in bottom sediments collected in the Deryugin Basin (the Sea of Okhotsk) has demonstrated that specific foraminiferal


Giant protists (xenophyophores and komokiaceans) from the Clarion-Clipperton ferromanganese nodule field (eastern Pacific)
Analyses of 38600 seafloor photographs, and fauna from 30 box-corers, taken in the Russian exploratory area at the Clarion-Clipperton Fracture Zone ferromanganese nodule field, revealed a diverse and abundant fauna of giant testate protists.
Non-Skeletal Biomineralization by Eukaryotes: Matters of Moment and Gravity
Although polyphosphate has a wide phylogenetic distribution among microbial eukaryotes, other non-skeletal minerals have more restricted distributions, and as yet there seems to be no definitive evidence that the alkaline earth components of barite and celestite are essential for completion of the life cycle in organisms that produce these minerals.
A new genus of xenophyophores (Foraminifera) from Japan Trench: morphological description, molecular phylogeny and elemental analysis
Based on a comparison of the compositions of the agglutinated test wall, the granellare, the stercomare, and the surrounding sediment, the impact of xenophyophores on their habitat is discussed and mass spectra analyses reveal unusually high concentrations of some elements.
228Ra/226Ra and 226Ra/Ba ratios to track barite formation and transport in the water column
Abstract We measured 228 Ra ex / 226 Ra ex and 226 Ra ex /Ba ex ratios in suspended and sinking particles collected at the Oceanic Flux Program (OFP) time-series site in the western Sargasso Sea and
Acantharians: a missing link in the oceanic biogeochemistry of barium
Abstract Inductively coupled plasma mass spectrometry was used to analyze the Ba and Sr concentrations of the celestite (SrSO4) skeletons and cysts of individual acantharian specimens obtained from
The crystallography and possible origin of barium sulphate in deep sea rhizopod protists (Xenophyophorea)
A comparison of the larger xenophyophore crystals with synthetically grown crystals indicated that the former probably grew at low supersaturation (S < 25) in solutions of low to moderate ionic strength (I < 1.0 M), and some preliminary observations of the cellular organisation of A. ramuliformis are reported.
Direct observation of episodic growth in an abyssal xenophyophore (Protista)
Three specimens of the xenophyophore Reticulammina labyrinthica were photographed on the Madeira Abyssal Plain (31°6.1′N, 21°10.9′W; 4944 m) using the Bathysnap time-lapse camera system. During the 8
Morphologies and transformations of celestite in seawater: The role of acantharians in strontium and barium geochemistry
Abstract Free-drifting sediment traps deployed at 400, 1500, and 3200 m were used to collect particles near the US JGOFS Time-Series Station (31°49.5′N and 64°08.2′ W) in the Atlantic Ocean.
The barite-opal-organic carbon association in oceanic particulate matter
Barite particles 0.5–5 μm in size are ubiquitous in the ocean and their formation, sinking and dissolution is a major part of the marine barium cycle1,2. Barite formation appears to be caused by
The dis  tribution of 226 Ra in the Atlantic Ocean
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  • 1988