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Meteoric water

Water of atmospheric origin: rain, snow, rivers, groundwater. Its δD and δ18O follow the global meteoric water line and become lighter towards high latitudes and altitudes, whereas magmatic water is much heavier in 18O (about 6 to 10 ‰). Their mixing shows up in ore fluids.

Composition

Global meteoric water line: δD = 8 × δ18O + 10 (Craig, 1961).

Sources

In the atlas

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