For aragonite precipitation in the lake, presence of magnesium in the water column is important. Why ?

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Javier Sánchez España

Hi,

It has been usually related to the adsoprtion of Mg2+ ions onto calcite mineral surfaces, as this process inhibits calcite precipitation while it does not affect significantly to the nucleation and growth of aragonite crystals. This simple chart (and the references contained in it) may help you,

Cheers,