Ferroan Dolomitization by Seawater Interaction with Mafic Igneous Dikes and Carbonate Host Rock at the Latemar Platform, Dolomites, Italy: Numerical Modeling of Spatial, Temporal, and Temperature Data

Table 4

Comparison of the initial present-day seawater composition to the modified seawater composition (i.e., following dike alteration) at 0.02 GPa and 40°C, 60°C, and 80°C. Only the species relevant to the dolomitization conceptual model are presented. More detailed speciation results are presented in Appendix F.

Temperature (°C)	Initial			Postseawater-dike interaction
	40	60	80	40	60	80
Species (mole/kg)
Ca^+2
Mg^+2
Fe^+2
Saturation index
Calcite	0.78	0.84	0.87	1.08	0.92	0.80
Nonferroan dolomite	2.08	2.39	2.62	2.68	2.56	2.49
Ferroan dolomite	2.04	2.34	2.56	2.79	2.64	2.56