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Saprolite is not as weathered as laterite; there is a continuum from the upper layer of saprolite to laterite. Saprolite (from Greek σαπρος (sapros) = putrid + λιθος (lithos) = rock) is a chemically weathered rock (literally, it means "rotten rock"). More intense weathering results in a continuous transition from saprolite to laterite.
Laterites are formed by the breakdown of minerals which then leach into groundwater, the leftover minerals join to form the new mineral known as laterites. Nickel is turned into usable quality ore grade by being merged into the newly formed stable minerals. [3] Silicate type (or saprolite type) nickel ore formed beneath the limonite zone. It ...
Soil layers, from soil down to bedrock: A represents soil; B represents laterite, a regolith; C represents saprolite, a less-weathered regolith; below C is bedrock Tropical weathering (laterization) is a prolonged process of chemical weathering which produces a wide variety in the thickness, grade, chemistry and ore mineralogy of the resulting ...
Residuum differs from saprolite through its structure and degree of weathering. Saprolite is commonly referring to weathered material retaining details or structural features of the bedrock. The distinguishing feature between these is that residuum no longer retains the structural features or details of its bed rock.
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upper saprolite: completely oxidised bedrock; lower saprolite: chemically reduced partially weathered rocks; saprock: fractured bedrock with weathering restricted to fracture margins; volcanic ash and lava flows that are interbedded with unconsolidated material [11]