4 (1085)

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.


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