{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,6]],"date-time":"2025-10-06T08:59:18Z","timestamp":1759741158843},"reference-count":44,"publisher":"Geological Society of London","issue":"4","license":[{"start":{"date-parts":[[2012,11,1]],"date-time":"2012-11-01T00:00:00Z","timestamp":1351728000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["GEEA"],"published-print":{"date-parts":[[2012,11]]},"abstract":"<jats:p>Catchment outlet sediments (0\u201310 cm depth, sieved to &lt;2 mm) collected at a very low density over most of the Australian continent have been analysed using the Mobile Metal Ion (MMI\u00ae) partial extraction technique. Of the 54 elements determined, eight are generally regarded as essential nutrients for plant growth: Ca, Cu, Fe, K, Mg, Mn, P and Zn. A further three, Mo, Ni and Se are considered significant micronutrients. Estimation of \u2018bioavailability\u2019 from MMI\u00ae analysis gives results comparable with standard agricultural measurements for many nutrients. Percentage \u2018bioavailability\u2019, operationally defined here as the ratio of MMI\u00ae concentration to total element concentration, has been investigated and ranges from 31% for Se to 0.1% for Fe. Smoothed (kriged) colour raster maps for continental Australia have been produced for these 11 nutrients and interpreted in terms of lithology (e.g. presence of carbonates in the MMI\u00ae Ca map), mineralization (e.g. known mineral districts in the Cu and Zn maps), environmental processes (e.g. salinity in K map, weathering and acid generation in Fe map) and agricultural practices (e.g. application of fertilizers in the MMI\u00ae P map). This first application of a partial extraction technique at the scale of a continent has yielded meaningful, coherent and interpretable results.<\/jats:p>","DOI":"10.1144\/geochem2011-090","type":"journal-article","created":{"date-parts":[[2012,11,16]],"date-time":"2012-11-16T16:04:48Z","timestamp":1353081888000},"page":"277-292","source":"Crossref","is-referenced-by-count":10,"title":["Bioavailability of nutrients in Australia from Mobile Metal Ion\u00ae analysis of catchment outlet sediment samples: continental-scale patterns and processes"],"prefix":"10.1144","volume":"12","author":[{"given":"A.","family":"Mann","sequence":"first","affiliation":[{"name":"Consultant, PO Box 778, South Fremantle, Western Australia 6162, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"de Caritat","sequence":"additional","affiliation":[{"name":"Geoscience Australia, GPO Box 378, Canberra, ACT 2601, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"Prince","sequence":"additional","affiliation":[{"name":"SGS Canada, 1885 Leslie St, Toronto, Ontario M3B 2M3, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1881","published-online":{"date-parts":[[2012,11,16]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1144\/1467-7873\/07-154"},{"key":"e_1_3_2_3_1","first-page":"113","article-title":"A comparative analysis of enzyme leach and mobile metal ion selective extractions; case studies from glaciated terrain, northern Ontario","volume":"61","author":"Bajc A.F.","year":"1998","unstructured":"Bajc A.F. 1998. 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