Elemental C, H and N microanalysis of crushed rock and soil samples

1972 ◽  
Vol 49 (4) ◽  
pp. 208-214 ◽  
Author(s):  
F. T. Lindgren ◽  
G. R. Stevens ◽  
L. C. Jensen
Keyword(s):  
Soil Samples ◽  
Crushed Rock ◽  
Rock And Soil

scholarly journals Heterogeneous temperature sensitivity of effective radium concentration from various rock and soil samples

2011 ◽  
Vol 11 (6) ◽  
pp. 1619-1626 ◽  
Author(s):  
F. Girault ◽  
F. Perrier
Keyword(s):  
Temperature Sensitivity ◽  
Temporal Variations ◽  
Soil Samples ◽  
Effect Of Temperature ◽  
Crushed Rock ◽  
Geothermal Systems ◽  
Large Heterogeneity ◽  
Accumulation Method ◽  
Rock And Soil ◽  
Reproducible Manner

Abstract. Temporal variations of radon concentration, or spatial variations around geothermal systems, are partly driven by the effect of temperature on the radon source term, the effective radium concentration (ECRa). ECRa from 12 crushed rock and 12 soil samples from Nepal was measured in the laboratory using the radon accumulation method and Lucas scintillation flasks at three temperatures: 7, 22 and 37 °C. For each sample and at each temperature, 5 or 6 measurements were carried out, representing a total of 360 measurements, with an ECRa average varying from 1.1 to 75 Bq kg−1. While the effect is small, ECRa was observed to increase with temperature in a significant and sufficiently reproducible manner. The increase was approximately linear with a slope (temperature sensitivity, TS) expressed in % °C−1. We observed a large heterogeneity of TS with average values (range min-max) of 0.79 ± 0.05 (0.16–2.0) % °C−1 and 0.61 ± 0.05 (0.10–2.0) % °C−1, for rock and soil samples, respectively. While this range overlaps with the results of previous studies, our values of TS tend to be smaller. The observed heterogeneity implies that the TS, rather poorly understood, needs to be assessed by dedicated experiments in every case where it is of consequence for the interpretation.

A new field technique for sealing and packing rock and soil samples

1970 ◽  
Vol 3 (2) ◽  
pp. 127-133 ◽  
Author(s):  
Brian Stimpson ◽  
Richard George Metcalfe ◽  
Geoffrey Walton
Keyword(s):  
Soil Samples ◽  
Field Technique ◽  
Rock And Soil

Determination of thallium in rock and soil samples

Talanta ◽  
1977 ◽  
Vol 24 (8) ◽  
pp. 521-523 ◽  
Author(s):  
R Böhmer
Keyword(s):  
Soil Samples ◽  
Rock And Soil

Permafrost-Hydrogeologic Regimen in Two Ice-Free Valleys, Antarctica, from Electrical Depth Sounding

1971 ◽  
Vol 1 (3) ◽  
pp. 389-409 ◽  
Author(s):  
L.D. McGinnis ◽  
T.E. Jensen
Keyword(s):  
Electrical Resistivity ◽  
Electrical Properties ◽  
Saline Lakes ◽  
Potable Water ◽  
Field Measurements ◽  
Soil Samples ◽  
Mcmurdo Sound ◽  
Groundwater Reservoir ◽  
Depth Sounding ◽  
Rock And Soil

Electrical resistivity field measurements and subsequent laboratory analyses of the electrical properties of soils and rocks, both frozen and unfrozen, are used to describe the type and configuration of permafrost in Wright and Taylor Valleys, Antarctica. Rock and soil samples saturated with potable water have resistivities that increase four orders of magnitude when cooled from +21°C to −25°C. Resistivities greater than 10,000 ohm-m are associated with an impermeable variety of permafrost referred to in this paper as confining permafrost. Confining permafrost is continuous throughout the ice-free valleys except near McMurdo Sound and under saline lakes. A hydrologic connection between lakes and the groundwater reservoir beneath the lakes is inferred; thus, part of the brines contained in the lakes may be derived from groundwater.

Radiometric analysis of rock and soil samples of Leepa Valley; Azad Kashmir, Pakistan

2013 ◽  
Vol 298 (3) ◽  
pp. 2049-2056 ◽  
Author(s):  
Muhammad Rafique ◽  
Abdul Jabbar ◽  
Abdul Razzaq Khan ◽  
Saeed Ur Rahman ◽  
Muhammad Basharat ◽  
...  
Keyword(s):  
Soil Samples ◽  
Radiometric Analysis ◽  
Azad Kashmir ◽  
Rock And Soil
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