PHOSPHOR IMAGING AS A TOOL FOR IN SITU MAPPING OF PPM LEVELS OF URANIUM AND THORIUM IN ROCKS AND MINERALS
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dc.contributor.author | Cole J.M. | |
dc.contributor.author | Nienstedt J. | |
dc.contributor.author | Spataro G. | |
dc.contributor.author | Rasbury E.T. | |
dc.contributor.author | Celestian A.J. | |
dc.contributor.author | Hanson G.N. | |
dc.contributor.author | Lanzirotti A. | |
dc.contributor.author | Nilsson M. | |
dc.date.accessioned | 2021-09-29T08:17:01Z | |
dc.date.available | 2021-09-29T08:17:01Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=14269168 | |
dc.identifier.citation | Chemical Geology, 2002, 193, 1-2, 127-136 | |
dc.identifier.issn | 0009-2541 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30681 | |
dc.description.abstract | Phosphor imaging is a type of digital autoradiography that has been widely used in biochemistry to examine radioactively tagged proteins. We used phosphor imaging to map in situ U and Th in polished slabs of geological materials including carbonates, phosphates, and silicate-rich rocks. We examined samples containing between 2 and >500 ppm U and ∼700 ppm Th to evaluate the applicability of the technique to geological samples. Resolution of 1 mm or better was obtained even for low concentration (∼10 ppm) samples. These analyses are routine and only require a light box, phosphor screen, and access to a phosphor imager. The technique is nondestructive, relatively inexpensive, and requires very little processing time. We used this technique to identify U- and Th-enriched carbonates and phosphates, and to find “hot spots” of U- and Th-rich minerals in a granodiorite. These high-resolution maps of U and Th allow us to effectively sample for geochronology and identify potentially interesting samples for synchrotron X-radiation studies. The maps produced by phosphor imaging also have great potential for investigating the details of adsorption of radionuclides to rocks and minerals in contaminated areas. | |
dc.title | PHOSPHOR IMAGING AS A TOOL FOR IN SITU MAPPING OF PPM LEVELS OF URANIUM AND THORIUM IN ROCKS AND MINERALS | |
dc.type | Статья |
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