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GL5 Resources 2004 Q3 Bulk Materials
With reference to one named non-metallic mineral of industrial value : (a)Describe the geological processes responsible for its formation. (b) Outline the stages in its processing from extraction to finished product.
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GL5 Resources 2004 Q3 Bulk Materials
(a)Examples sand and gravel, clays(incl. kaolin), limestones, gypsum, talc, slate etc. Origins described : sedimentary / igneous / metamorphic processes which may include reference to "purity" (if relevant) and accumulation of sufficient bulk for the deposit to be economic. e.g. Kaolin - (hydrothermal) chemical breakdown of (granite) feldspars. Igneous environment. Limestone - warm, shallow, clear, marine waters. Accumulation of skeletal material (bioclastic / chalk). Water movement for oolitic.
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GL5 Resources 2004 Q3 Bulk Materials
(b)Stages to include (?) : (e.g.) Kaolin : water jetting settling tanks used in paper, bone china etc. Limestone : drilling blasting crushing roasting to lime for (e.g.) cement. cutting / (polishing) to building stone.
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