Rock Varnish: A Passive Forensic Tool for Monitoring Recent Air Pollution and Source Identification
作者： Kenneth Hoar , Piotr Nowinski , Vernon Hodge , James Cizdziel
DOI: 10.13182/NT11-A12307
关键词: Mineralogy 、 Forensic science 、 Las vegas 、 Desert varnish 、 Uranium 、 Air pollution 、 Varnish 、 Test site 、 Environmental science 、 Hydrology 、 Thorium
摘要: AbstractRock varnish samples were collected near three point sources of air pollution to determine if the contained a record recent pollution. Samples as follows: downwind Nevada Test Site (NTS); in fallout pattern shuttered Mohave Power Plant, located Laughlin, Nevada; and, operating Reid-Gardner just east Las Vegas, Nevada. Analysis NTS rock shows 240Pu/239Pu mass ratios low 0.0592 ± 0.0003 and 241Pu/239Pu 0.00063 0.00004, compared worldwide values 0.18 0.01 0.009 0.002, respectively, clearly indicating that can be used forensic tool for identifying source pollution, this case NTS. The plumes coal-fired power plants contain thorium uranium, have 232Th/238U from 1 30, concentrations 5 755 ppm Th 578 U. highest these elements occur tog...
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