| Автор | Butt, C. R. M. |
| Автор | Gole, M. J. |
| Автор | Hart, M. K. W. |
| Дата выпуска | 1987 |
| dc.description | Orientation surveys were conducted to test the potential of using <sup>4</sup>He as a pathfinder in mineral and hydrocarbon exploration. Groundwaters were sampled from drill holes and stock wells. Overburden gas samples were collected via fixed tubes emplaced at 6 m depth in backfilled drill holes. While He concentrations in groundwaters associated with most U mineralization were far in excess of the atmospheric equilibrium value of 0.044 μL/L, equivalent, or higher, concentrations were found in groundwaters from unmineralized areas around the deposits. These latter concentrations appear to be due to accumulation of He in groundwaters with long residence times and by leakage from deep sources, particularly granitoid basement. Only at the Koongarra U deposit, where groundwaters are annually recharged, did anomalous He concentrations appear to indicate the presence of the deposit. No credible He anomaly was detected in overburden gas over any U deposit. However, a marked overburden gas He anomaly was detected over the Gingin gas field, although normalization to constant <sup>20</sup>Ne suggested much of this to be a relative enrichment due to near‐surface biological activity related to the leakage of hydrocarbons altering the major gas composition, particularly the CO<sub>2</sub>/O<sub>2</sub> ratio of the soil atmosphere. It is concluded that He, when used in conjunction with other gases, may be useful in near‐surface geochemical exploration for hydrocarbons but that it does not appear to be an effective pathfinder for U deposits. |
| Формат | application.pdf |
| Копирайт | Copyright 1987 by the American Geophysical Union. |
| Тема | Helium Studies in Geology |
| Тема | ATMOSPHERIC COMPOSITION AND STRUCTURE |
| Тема | Biosphere/atmosphere interactions |
| Тема | BIOGEOSCIENCES |
| Тема | Biosphere/atmosphere interactions |
| Тема | GLOBAL CHANGE |
| Тема | Atmosphere |
| Тема | HYDROLOGY |
| Тема | Groundwater hydrology |
| Тема | Groundwater/surface water interaction |
| Тема | Groundwater quality |
| Тема | Groundwater transport |
| Тема | MINERALOGY AND PETROLOGY |
| Тема | Mineralogy, Petrology, and Rock Chemistry: Mineral occurrences and deposits |
| Тема | Mineralogy, Petrology, and Rock Chemistry: Instruments and techniques |
| Название | A review of Australian experience in the evaluation of helium as a pathfinder in exploration |
| Тип | article |
| DOI | 10.1029/JB092iB12p12595 |
| Electronic ISSN | 2156-2202 |
| Print ISSN | 0148-0227 |
| Журнал | Journal of Geophysical Research: Solid Earth |
| Том | 92 |
| Первая страница | 12595 |
| Последняя страница | 12603 |
| Выпуск | B12 |
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