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metasomatic replacement
(redirected from metasomatism)

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metasomatic replacement

Process of simultaneous solution and deposition in which one mineral replaces another. It is the method by which wood is petrified (silica replaces the wood fibres), minerals form pseudomorphs (new minerals that preserve the characteristic outward form of the earlier mineral that was replaced), or an ore mineral assemblage takes the place of an earlier rock type. Replacement minerals may themselves be replaced, and definite mineral successions have been established. Replacement deposits may be highly valuable ore deposits.
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The REE mineralization is probably epigenetic and may correspond to an episode of metasomatism associated with the emplacement of the Kimber alkaline intrusions (Labbe et al.
Government geoscience stimulates mineral exploration in the superior ... by Simard, Martin / Geoscience Canada
Skuppesavon Deposit - Mineralisation is associated with stratabound fracturing and sodium metasomatism and desilication, in north trending, steep westerly dipping, part skarnified acid meta-volcanics.
Continental Precious Minerals Inc.: Results of NI 43-101 Geological ... by Business Wire
This second style of mineralization, associated with intense metasomatism in the paragneisses, consists of wide-spread alteration and mineralization in outcrops and intervening frost-heaved float and sub-outcrop material occupying a 5.
Canaco Resources Ltd. - Powderhorn Exploration Update by Business Wire
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