scholarly journals Lab measurements of noble gas capture from water saturated non welded tuff.

2020 ◽  
Author(s):  
Stephen Bauer ◽  
Scott Broome ◽  
Payton Gardner
Keyword(s):  
Noble Gas ◽  
Welded Tuff ◽  
Water Saturated

scholarly journals Creep Deformation and Creep Life of Noboribetsu Welded Tuff under Air-dried and Water-saturated Conditions

2001 ◽  
Vol 117 (9) ◽  
pp. 718-724 ◽  
Author(s):  
Jun-ichi KODAMA ◽  
Tatsuhiko GOTO ◽  
Yoshiaki FUJII ◽  
Yutaka YOSHIDA ◽  
Ken-ichi ITAKURA
Keyword(s):  
Creep Deformation ◽  
Creep Life ◽  
Welded Tuff ◽  
Water Saturated

Temperature dependence of the electrical resistivity of water‐saturated rocks

Geophysics ◽  
1990 ◽  
Vol 55 (5) ◽  
pp. 576-585 ◽  
Author(s):  
F. J. Llera ◽  
M. Sato ◽  
K. Nakatsuka ◽  
H. Yokoyama
Keyword(s):  
Temperature Dependence ◽  
Platinum Electrodes ◽  
Electrical Measurements ◽  
Abrupt Decrease ◽  
Thermally Induced ◽  
Water Characteristics ◽  
Welded Tuff ◽  
Crystalline Limestone ◽  
Resistivity Variation ◽  
Water Saturated

The electrical resistivities of several dacitic tuffs, sandstone, andesite, granite, and crystalline limestone samples, saturated with a 0.001 M aqueous solution of KC𝓁;, were measured in the range from room temperature to 250°C. The experiments were made using a cell technique with platinum electrodes. Of particular interest are the data collected at temperatures above 200°C under high pressure, a region scarcely documented in the literature. Basically the samples used in the present study show a quasi‐exponential decrease of resistivity with temperature up to 200°C. The same temperature dependence is found for the resistivity of the saturating solution, thus confirming that conduction in water‐saturated rocks is essentially electrolytic. At temperatures above 200°C, some specimens of highly porous dacitic tuff still closely follow the saturating solution in the pattern of resistivity variation with temperature, exhibiting a minimum around 220°C; however, the behavior of low‐porosity crystalline rocks (notably granite) where a relatively abrupt decrease of resistivity is observed above 50°C, departs from that of the saturating solution. Hysteresis phenomena are more or less observed in most rock samples; i.e., the resistivity after one complete thermal cycle is systematically lower than its initial value. This experimental evidence points out that mechanisms different from water characteristics, such as growth of microcracks or chemical reactions, contribute to electrical conduction at high temperature. We point out the electrical signature of the thermally induced growth of microcracks (thermal cracking) in welded tuff and granite and suggest the possibility of using electrical measurements to monitor an extension of reservoir fractures in hot dry rock.

An Environmental Wet Cell For High Voltage Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 18-19
Author(s):  
N.J. Tighe ◽  
H.M. Flower ◽  
P.R. Swann
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Image Quality ◽  
Inelastic Scattering ◽  
High Voltage ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
Environmental Cell ◽  
Water Saturated ◽  
High Temperature Gas

A differentially pumped environmental cell has been developed for use in the AEI EM7 million volt microscope. In the initial version the column of gas traversed by the beam was 5.5mm. This permited inclusion of a tilting hot stage in the cell for investigating high temperature gas-specimen reactions. In order to examine specimens in the wet state it was found that a pressure of approximately 400 torr of water saturated helium was needed around the specimen to prevent dehydration. Inelastic scattering by the water resulted in a sharp loss of image quality. Therefore a modified cell with an ‘airgap’ of only 1.5mm has been constructed. The shorter electron path through the gas permits examination of specimens at the necessary pressure of moist helium; the specimen can still be tilted about the side entry rod axis by ±7°C to obtain stereopairs.

Interactions of noble gas atoms. Processes due to elastic scattering

1989 ◽  
Vol 14 (5) ◽  
pp. 467-604 ◽  
Author(s):  
A.Z. Devdariani ◽  
A.L. Zagrebin ◽  
K.B. Blagoev
Keyword(s):  
Elastic Scattering ◽  
Noble Gas
Sign in / Sign up

Export Citation Format

Share Document