Lithogenic silica

Lithogenic silica

Lithogenic silica (LSi) comes from the Greek words "lithos", which means "rock", and "genesis", which means "coming from". LSi is silica that originates from terrestrial sources of rock and soil, i.e. from silicate minerals and crystals.

In the marine silicon cycle, LSi in the ocean is derived from rivers (5.6 Tmol Si/yr), eolian dust (0.5 Tmol Si/yr), hydrothermal vents (0.2 Tmol Si/yr), basalt weathering (0.4 Tmol Si/yr), and from benthic fluxes (23 Tmol Si/yr) from the sediment into the ocean's interior (Tréguer et al., 1995).

LSi can either be accumulated "directly" in marine sediments or be transferred into dissolved silica (DSi) in the water column.


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  • Biogenic silica — (BSi) is the equivalent to the terms opal, biogenic opal, and amorphous opaline silica. BSi is essential to many plants and animals. Chemically, BSi is hydrated silica (SiO2• n H2O).Diatoms in both fresh and salt water extract silica from the… …   Wikipedia

  • Microspherulite — Microspherulites are microscopic spherical particles with < 2 mm diameters, usually in the 100 micrometre range, mainly consisting of mineral material (the Greek litos means stone ). Only bodies created by natural physico chemical… …   Wikipedia

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