Influence of major cations of sea water on the desorption of137Cs from marine sediments

1994 ◽  
Vol 187 (3) ◽  
pp. 197-205 ◽  
Author(s):  
D. V. M. Desai ◽  
Sathi S. Kumar ◽  
K. C. Pillai
Keyword(s):  
Marine Sediments ◽  
Sea Water ◽  
Major Cations

scholarly journals Distribution of Radionuclides among Green Alga, Marine Sediments and Sea Water

1977 ◽  
Vol 18 (4) ◽  
pp. 322-330 ◽  
Author(s):  
R. NAKAMURA ◽  
Y. SUZUKI ◽  
T. UEDA
Keyword(s):  
Green Alga ◽  
Marine Sediments ◽  
Sea Water

The Yorkshire Dogger: III. Upper Eskdale

1943 ◽  
Vol 80 (6) ◽  
pp. 209-230 ◽  
Author(s):  
R. H. Rastall ◽  
J. E. Hemingway
Keyword(s):  
Shallow Water ◽  
Sea Level ◽  
Marine Sediments ◽  
Sea Water ◽  
Second Phase ◽  
Faunal Assemblage ◽  
Chemical Changes ◽  
Main Series ◽  
Uplift And Erosion ◽  
Shallow Water Sediments

1. A sequence of strata is determined in the Dogger of Upper Eskdale and its tributary valleys. The rocks fall into three main series, which are subdivided into groups.2. The underlying Yeovilian sediments, originally included with the Dogger, are mapped and briefly described. The unconformity between them and the Dogger is emphasized.3. The Dogger is marine throughout but only the oldest yields an adequate faunal assemblage, similar to that of the Glaisdale Oolite Series (upper opalinum). The greater part of the Dogger of this area is therefore younger than that of the Yorkshire Coast.4. Chemical changes in the sea-water caused the deposition of siderite to characterize the earliest phase (Glaisdale Oolite Series). This was succeeded by a phase of dominantly chamosite deposition (the Chamositic Series) followed by a reversion to siderite deposition (the Ajalon Series).5. Earth-movement controlled sedimentation over the area. During the first phase an eastern tilt to the region held the centre and west above or near sea-level, where it received no sediment. The second phase saw general depression with the accumulation of shallow water sediments. This was followed by uplift and erosion when a broad shallow valley was cut. Partial depression then flooded the valley with derived marine sediments.

The evolution of saline and thermal groundwaters in the Carnmenellis granite

1984 ◽  
Vol 48 (348) ◽  
pp. 407-424 ◽  
Author(s):  
W. M. Edmunds ◽  
J. N. Andrews ◽  
W. G. Burgess ◽  
R. L. F. Kay ◽  
D. J. Lee
Keyword(s):  
Sea Water ◽  
Circulation Pattern ◽  
Thermal Waters ◽  
Groundwater Salinity ◽  
Geological Time ◽  
Mine Waters ◽  
Geological Time Scale ◽  
Plagioclase Feldspar ◽  
Major Cations ◽  
Groundwater Circulation

Abstract The Carnmenellis granite and its aureole contain the only recorded thermal groundwaters (up to 52 °C) in British granites. They occur as springs in tin mines at depths between 200 and 700 m and most are saline (maximum mineralization 19 310 mg 1−1). Mining activity has disturbed the groundwater circulation pattern developed over a geological time-scale and levels of bomb-produced tritium (> 4 TU) indicate that a significant component (up to 65 %) of the most saline waters are of recent origin. All components of all the mine waters are of meteoric origin. Radiogenic 4He contents, 40Ar/36Ar ratios, and uranium series geochemistry suggest that the thermal component has a likely residence time of at least 5 × 104 years and probably of order 106 years. The thermal waters have molar Na+/Cl− ratios considerably less than 1 but they are enriched relative to sea water in all major cations except Mg. The groundwater is also particularly enriched in Li with contents ranging up to 125 mg 1−1. The groundwater salinity, which may reach a maximum of 30 000 mg 1−1, is shown to result from weathering reactions of biotite (probably through a chloritization step) and plagioclase feldspar, to kaolinite. On volumetric considerations, fluid inclusions cannot contribute significantly to the groundwater salinity, and stable isotope ratios rule out any contribution from sea water. Groundwater silica contents and molar Na+/K+ ratios suggest that the likely equilibration temperature is 54°C, which would imply a depth of circulation of about 1.2 km.

An ion-exchange scheme for the determination of the major cations in sea water

1966 ◽  
Vol 36 ◽  
pp. 439-448 ◽  
Author(s):  
R. Greenhalgh ◽  
J.P. Riley ◽  
M. Tongudai
Keyword(s):  
Ion Exchange ◽  
Sea Water ◽  
Major Cations

Chromatographic Analysis of Hydrocarbons in Marine Sediments and Sea water

1975 ◽  
Vol 13 (11) ◽  
pp. 535-540 ◽  
Author(s):  
W. E. May ◽  
S. N. Chesler ◽  
S. P. Cram ◽  
B. H. Gump ◽  
H. S. Hertz ◽  
...  
Keyword(s):  
Marine Sediments ◽  
Chromatographic Analysis ◽  
Sea Water

The occurrence of thallium in sea water and marine sediments

1970 ◽  
Vol 6 ◽  
pp. 149-152 ◽  
Author(s):  
A.D. Matthews ◽  
J.P. Riley
Keyword(s):  
Marine Sediments ◽  
Sea Water
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