4 (1085)

|*mw| Endotkam	Retrograde altaration 1 ... . i of hornfala
Reaction t——J akam	■■1 Retrograde altaration ■BI of akarn
Marbia	li:l;!;S Soricłtlzetion
|h h | Hornfala	Lj-jjjI Sulphide rapłacamant R?--J minaralization
+ łntruaion	§ Eaoakarn
1 1 Shala	y* Meteoric water
(| i ‘ {Limaatona	Magmatic water Metamorphic water

Fig-13.9 Stages in the <kvek>pment of łkani depołits. (1) The intruiion of hot magma drim out ground, format i on and metimorphic waten, produccs a metamorphic aureole and reaction ikarna. (2) Hydrolbcrroal łolutiom euolvc from the cryttallizing magma to form endo- and eaoskams, torne wlphide replaoement minerałizatioo nuty oocur. (3) The system coolł permitting mtrtcoric water to enter the intrusion and the łkams, producing łcricitization in the intrusion and retrograde rcactiom in the skams and hornfclses. Sulphide rcplaccment bodies may dcvclop during this stage.