THE SEARCH FOR ORE DEPOSITS USING THERMAL RADIATION

Geophysics ◽  
1966 ◽  
Vol 31 (1) ◽  
pp. 225-242 ◽  
Author(s):  
D. W. Strangway ◽  
R. C. Holmer
Keyword(s):  
Thermal Radiation ◽  
Ore Deposits ◽  
Hot Water ◽  
Ground Temperature ◽  
Temperature Measurements ◽  
Thermal Inversion ◽  
Topographic Features ◽  
Kennecott Copper ◽  
The Hill

Kennecott Copper Corporation has conducted several months of airborne infrared work in an attempt to detect patterns related to geology or the presence of oxidizing sulphides. The results encountered have shown that certain microclimatological effects are very important. Among these are the hill effect shown by small topographic features bathed in warm air under thermal inversion conditions. Major faults are evidently reflected in some cases as are areas of subterranean hot water. These observations have been confirmed by ground temperature measurements in holes two to three ft deep.

scholarly journals Shallow ground temperature measurements on the highest volcano on Earth, Mt. Ojos del Salado, Arid Andes, Chile

2018 ◽  
Vol 30 (1) ◽  
pp. 3-18 ◽  
Author(s):  
Balázs Nagy ◽  
Ádám Ignéczi ◽  
József Kovács ◽  
Zoltán Szalai ◽  
László Mari
Keyword(s):  
Ground Temperature ◽  
Temperature Measurements

scholarly journals Der Wärmehaushalt periglazialer Hochgebirgsböden – Zusammenhänge zwischen Bodentiefe und Frostwechseln (Nördlicher Tian Shan, Kasachstan)

2009 ◽  
Vol 58 (1) ◽  
pp. 70-85
Author(s):  
Henry Munack ◽  
Hilmar Schröder
Keyword(s):  
Ground Temperature ◽  
Temperature Measurements ◽  
High Mountains ◽  
Freeze Thaw ◽  
Periglacial Zone ◽  
Thermal Content ◽  
Tian Shan

Abstract. Ground temperature measurements have been carried out at eleven different sites of the Prokhodnaja valley in the high mountains of the Zailijskij Alatau (Northern Tian Shan, Kazakhstan) between the summers of 2003 and 2004. For this purpose the periglacial zone and adjacent altitudinal zones have been examined between 2,500 and 4,000 m asl with an equidistance of 250 m. The influences of the altitude, the exposure as well as the depth below the earth’s surface on the thermal content and condition of periglacial soils have been considered. The measurements provide useful information about the relations between quantity and quality of freeze-thaw action and the parameters mentioned above.

Solar and Thermal Radiation Errors on Upper-Air Radiosonde Temperature Measurements

2013 ◽  
Vol 30 (10) ◽  
pp. 2382-2393 ◽  
Author(s):  
R. Philipona ◽  
A. Kräuchi ◽  
G. Romanens ◽  
G. Levrat ◽  
P. Ruppert ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Thermal Radiation ◽  
Air Temperature ◽  
Weather Prediction ◽  
Lower Troposphere ◽  
Longwave Radiation ◽  
Atmospheric Temperature ◽  
Radiative Heating ◽  
Temperature Measurements ◽  
High Quality

Abstract Atmospheric temperature and humidity profiles are important for weather prediction, but climate change has increased the interest in upper-air observations asking for very high-quality reference measurements. This paper discusses an experimental approach to determine the radiation-induced error on radiosonde air temperature measurements. On the one hand, solar shortwave and thermal longwave radiation profiles were accurately measured during radiosonde ascents from the surface to 35-km altitude. On the other hand, air temperature was measured with several thermocouples on the same flight, simultaneously under sun-shaded and unshaded conditions. The radiation experiments reveal that thermal radiation errors on the very thin thermocouple of the Meteolabor SRS-C34 radiosonde are similar during night- and daytime. They produce a radiative cooling in the lower troposphere and the upper stratosphere, but a radiative heating in the upper troposphere and lower stratosphere. Air temperature experiments with several thermocouples, however, show that solar radiation produces a radiative heating of about +0.2°C near the surface, which linearly increases to about +1°C at 32 km (~10 hPa). The new solar radiation error profile was then applied to SRS-C34 measurements made during the Eighth WMO Intercomparison of High Quality Radiosonde Systems, held in Yangjiang, China, in July 2010. The effects of thermal and solar radiation errors are finally shown in contrast to the 10 other internationally used radiosonde systems, which were flown during this international campaign.

Assessment of a Steam Generator Circulation Ratio by a Thermal Balance Based on External Wall Temperature Measurements

2010 ◽  
Author(s):  
Geoffrey Deotto ◽  
Olivier Brunin ◽  
Alexandre Nicoli ◽  
Franck David
Keyword(s):  
Steam Generator ◽  
Nuclear Power ◽  
Thermal Balance ◽  
Hot Water ◽  
Temperature Measurements ◽  
Circulation Loop ◽  
Hydraulic Pressure ◽  
Steam Generators ◽  
External Wall ◽  
Circulation Ratio

During operation, sludge steadily appears at a slow pace on the secondary side of nuclear power plant steam generators. This leads to clogging of the tube bundle support plates, and consequently to a change in the thermal-hydraulic flow conditions. The circulation ratio of a steam generator is defined as the ratio between the total flowrate circulating in the riser and the steam flowrate at the outlet of the steam generator. This is a good indicator of the hydraulic pressure losses in the circulation loop. In particular, the increase in hydraulic resistance due to the tube support plate clogging leads to a drop in this parameter. For this reason, in order to check that clogging does not reach too high a level, the circulation ratio is regularly evaluated on steam generators of French nuclear power plants, and then compared to established safety limits. The purpose of this paper is to present an accurate method to determine the circulation ratio of a steam generator based on temperature measurements taken around the wall of the steam generator. This method consists of carrying out a thermal balance of the flow circulating in the downcomer. In order to accomplish this, the temperature of the water circulating in the downcomer is evaluated using thermocouple belts put on the external wall of the appliance. However, additional hypotheses in the calculation method are considered in order to take into account for the heat transfer between hot water inside the downcomer and the sensors. The steam generator circulation loop and the clogging of the tube support plates are presented in §1. Then §2 and §3 describe in detail the method and the associated hypotheses as well as the required instrumentation. Finally, §4 presents an application of this method to real cases of clogged steam generators.

Thermal radiation from laser heated silicon and pyrometric temperature measurements

1984 ◽  
Vol 45 (2) ◽  
pp. 159-161 ◽  
Author(s):  
M. Kemmler ◽  
G. Wartmann ◽  
D. von der Linde
Keyword(s):  
Thermal Radiation ◽  
Temperature Measurements ◽  
Laser Heated

Temperature measurements using multicolor pyrometry in thermal radiation heating environments

2014 ◽  
Vol 85 (4) ◽  
pp. 044901 ◽  
Author(s):  
Tairan Fu ◽  
Jiangfan Liu ◽  
Minghao Duan ◽  
Anzhou Zong
Keyword(s):  
Thermal Radiation ◽  
Temperature Measurements ◽  
Radiation Heating
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