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RODINGITIZATION OF IRANIAN BASIC ROCKS: A NEW INTERPRETATION | ||
| Journal of Sciences, Islamic Republic of Iran | ||
| مقاله 8، دوره 13، شماره 2، شهریور 2002 اصل مقاله (153.65 K) | ||
| چکیده | ||
| Mineral paragenesis of rodingitized basic rocks of Iranian ophiolites are presented and metasomatic reactions between Ca+2 bearing aqueous fluids issued during serpentinization of host ultramafic rock – with magmatic minerals of basic rocks leading to present paragenesis of rodingites are discussed. It is concluded that Ca+2 rich aqueous fluid in equilibrium with serpentinite has high Ca+2 chemical potential to react with magmatic minerals of basic dykes resulting in lowering the free energy of system, appearance of a new mineral paragenesis and total or partial conversion of basic dykes to rodingites. A feedback mechanism is proposed to account for inter-relationship of serpentinization and rodingitization. | ||
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