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silcrete |
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silcrete [′sil‚krēt] (geology) A conglomerate of sand and gravel cemented by silica. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| After drilling through a 34 meter thick section of loose sand and a Kalahari-Formation silcrete, abundant coarse grains of kimberlitic ilmenite, diopside and pyrope up to 5 mm in size were visually identified in altered kimberlite from 34 meters depth. Sampled media included: 1) termite mounds and saprolite analyzed for gold using 2-kg bottle roll cyanidation; and 2) transported material such as lacustrine clay, silcrete and calcrete analyzed for gold plus 4 pathfinder elements (Co, Ni, Pd, Ag) by the "Mobile Metal Ions" (MMI-B5) procedure. The main sampled medium was termite mounds and saprolite material assayed for gold using a 2-kg bottle roll cyanidation procedure, and transported material (mbuga soil, silcrete, calcrete) which was assayed for "Mobile Metal Ions" by MMI-B procedure. |
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