saprolite

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saprolite

[′sap·rə‚līt]
(geology)
A soft, earthy red or brown, decomposed igneous or metamorphic rock that is rich in clay and formed in place by chemical weathering. Also known as saprolith; sathrolith.
References in periodicals archive ?
(1997, 1999, 2000, 2001a, 2001b) is that unmantled samples must be saprolitic to be included in the soil production function, whereas TCN-based bedrock outcrop lowering rates are considered as hard rock erosion rates, even though they are often plotted with lowering rates of saprolite.
The relief formed by this erosion of deep saprolites consists basically of raised residual platforms surrounded by areas with very abrupt relief, where the geological profile is characterized by bundles of surface deposits (saprolitic materials reworked by erosion) covering the saprolite previously formed in situ.
The gold mineralization is generally confined within the main fault area, which is continuous from surface to a depth of more than 500 metres vertically, including about 400 metres into hard rock (below the Saprolitic profile).
The presence of saprolitic material in the pans and lower parts of the Mackenzie's Waterholes Creek profile indicates a more complex history involving mixing of constituents from two sources.
Exploration for the emerald-bearing veins has been successfully accomplished in the past by locating the upward reaches of the northeast-trending quartz and quartz mica veins in the saprolitic zones.
The lateritic and saprolitic subsoils had < [10.sup.4] CFU/g of soil microorganisms and the actinomycetes represented < 30% of the total counted bacteria.
The activity levels of the 2 mine subsoils were the lowest with only 15.1 nmol fluorescein/h.g dry soil for the saprolitic subsoil.
Despite their very low organic matter content (Table 1), the lateritic and saprolitic subsoils contained a number of fungal genera, especially the latter, from which 10 different genera were observed.
The company is examining incorporation of atmospheric leaching of available high-grade saprolitic ore as an additional processing step, which could further improve project economics and justify a smaller initial development.
Because of the gold boom--largely due to its high value and the heap-leachable nature of lateritic and saprolitic materials--base metals have been somewhat neglected.
A major limitation was the RAB drilling technique and the tendency to drill to "RAB refusal." Consequently many early holes tested only the highly weathered, leached, and saprolitic bedrock containing little gold, even directly above the deposit.