226Ra, 210Pb, 210Po Distributions at the Sea off Southern Taiwan: Radioactive Disequilibria and Temporal Variations
نویسندگان
چکیده
منابع مشابه
210Pb-226Ra disequilibria in young gas-laden magmas
We present new 238U-230Th-226Ra-210Pb and supporting data for young lavas from southwest Pacific island arcs, Eyjafjallajökull, Iceland, and Terceira, Azores. The arc lavas have significant 238U and 226Ra excesses, whereas those from the ocean islands have moderate 230Th and 226Ra excesses, reflecting mantle melting in the presence of a water-rich fluid in the former and mantle melting by decom...
متن کامل226Ra, 210Pb, 210Bi and 210Po deposition and removal from surfaces and liquids
Deposition of 226Ra from water on nylon was investigated. Measurements performed for different pH and different radium concentrations in the water gave similar absolute activities deposited on the foil surface. Obtained results were used to estimate the amount of 226Ra plated-out on the nylon scintillator vessel in the solar neutrino experiment BOREXINO during filling of the detector. Another p...
متن کاملTimescales of magmatic processes and eruption ages of the Nyiragongo volcanics from 238U-230Th-226Ra-210Pb disequilibria
a r t i c l e i n f o Keywords: silica-undersaturated volcanism 238 U-230 Th-226 Ra-210 Pb series disequilibria magma transport and residence time carbonate metasomatism volcanic hazard assessment The silica-undersaturated Nyiragongo volcanics, located in the East African Rift, have globally unique chemical compositions and unusually low viscosities, only higher than carbonatite lavas, for terr...
متن کامل210Po and 210Pb cycling in a hydrothermal vent zone in the coastal Aegean sea.
To quantify the potential enhancement of naturally-occurring 210Po and 210Pb that may result from the high sulfur-reducing and sulfur-oxidizing regimes associated with hydrothermal vents, sinking particles from both inside and outside vent areas and benthic molluscs grazing on or living near bacterial mats in the vent zone were collected off Milos Island (Aegean Sea) and analyzed for their 210P...
متن کاملScavenging, cycling and removal fluxes of 210Po and 210Pb at the Bermuda Time-series Study site
Quantifying relative affinities of Po and Pb in different populations of marine particulate matter is of great importance in utilizing Po as a tracer for carbon cycling. We collected and analyzed water samples for the concentrations of dissolved and total Po and Pb from the upper 600 m of the water column at Bermuda Timeseries Study site (September 1999 to September 2000) to investigate their s...
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ژورنال
عنوان ژورنال: Terrestrial, Atmospheric and Oceanic Sciences
سال: 1997
ISSN: 1017-0839
DOI: 10.3319/tao.1997.8.3.255(o)