Gmelinite and herschelite from the Ilimaussaq intrusion in South Greenland
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چکیده
Hypogene alteration of ussingite from the southern part of the Ilimaussaq intrusion in South Greenland has resulted in the formation of three associations: gmelinite--apophyllite, gmeliniteherschelite-earthy-natrolite, and earthy natrolite alone. Ossingite reacted with late magmatic fluids, producing the secondary minerals either by in situ replacement of the ussingite or in cavities, which may be up to 3 cm across.
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