2015
DOI: 10.22146/jag.7184
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Lateritization process of peridotites in Siruka, Choiseul, Solomon Islands

Abstract: The lateritic weathering crusts exposed in Siruka, Choiseul Islands, Solomon Islands, were developed on the expense of serpentinized peridotite underlain by Siruka schists and Voza lavas with a subhorizontal contact. The lateritic profiles consist of three generalized zones: bedrock, saprolitic zone (weathered and decomposed zone) and the limonitic zones. The profiles demonstrate variations in depths and continuity but illustrate mineralogy and geochemical affinity down profile and are analogous to saprolitic … Show more

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Cited by 5 publications
(13 citation statements)
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“…Later, it continuously decreases in lower laterite (1%), upper laterite (0.9%), and soil (0.71%) (Figure 3i). The Mg distribution in bedrock and its weathered layers is related to Mg-Ni replacement process by an ionic exchange reaction such as: Mg-serpentine + Ni 2+ = Ni-rich serpentine + Mg 2+ (Sagapoa et al, 2011). Serpentinization was megascopically detected in the field work (Figure 2c).…”
Section: J O Gmentioning
confidence: 93%
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“…Later, it continuously decreases in lower laterite (1%), upper laterite (0.9%), and soil (0.71%) (Figure 3i). The Mg distribution in bedrock and its weathered layers is related to Mg-Ni replacement process by an ionic exchange reaction such as: Mg-serpentine + Ni 2+ = Ni-rich serpentine + Mg 2+ (Sagapoa et al, 2011). Serpentinization was megascopically detected in the field work (Figure 2c).…”
Section: J O Gmentioning
confidence: 93%
“…Similar progressive decreasing trends are shown on MgO and CaO which are declined to the average of 22.12% and 1.01% in layer 5 -7, to 10.24% and 0.41% in layer 4, to 9.25% and 0.39% in layer 3, to less than 12% and 0.3% in layer 1 (Figures 3b and c). These declining patterns depict Si, Mg, and Ca characters as leaching elements during weathering (Sagapoa et al, 2011).…”
Section: Mobilization Pattern Of Major Elements and Heavy Metalsmentioning
confidence: 97%
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