ABOUT THIS ISSUE
Cosmic dust is submillimeter debris shed by comets, asteroids, moons, and planets. These small particles are the largest source of extraterrestrial material accreting on the present-day Earth. Although atmospheric entry heating and terrestrial weathering modify many particles, some are pristine primitive extraterrestrial materials that contain high abundances of isotopically anomalous presolar grains and primitive carbon compounds that have not been altered since their formation. Analysis of cosmic dust provides invaluable information on initial planetary building materials and formation of our Solar System.
In press: June 1, 2016
Volume 12, Number 4 (August) • Deep-Mined Geological Disposal of Radioactive Waste
The construction of geological disposal facilities for radioactive waste has been a long time in the discussion and planning, but will become a major focus of geological, mineralogical, and geochemical effort in coming years. Underground laboratories have been operating for many years in a variety of rock types. A number of national projects that will dispose of heat-producing waste are nearing the licencing stage: sites have been selected, and planning is moving forward in many countries. Geological disposal raises complex technical issues, but it is also at the centre of social and political controversy. Different countries have very different waste inventories and quantities of waste; they may also have different geological settings available to host a repository. The issue of Elements will present case studies of the concepts for repositories hosted in the range of possible host rocks that have been considered worldwide. The varied approaches to selecting a site that is acceptable to local communities will be reviewed.
A publication of the Mineralogical Society of America, the Mineralogical Society of Great Britain and Ireland, the Geochemical Society, the Mineralogical Association of Canada, The Clay Minerals Society, the International Association of GeoChemistry, the European Association of Geochemistry, the Société Française de Minéralogie et de Cristallographie, the Association of Applied Geochemists, the Deutsche Mineralogische Gesellschaft, the International Association of Geoanalysts, the Società Italiana di Mineralogia e Petrologia, the Polskie Towarzystwo Mineralogiczne (Mineralogical Society of Poland), the Sociedad Española de Mineralogía (Spanish Mineralogical Society), the Swiss Society of Mineralogy and Petrology, The Meteoritical Society, and the Japan Association of Mineralogical Sciences.
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