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Definition of gossan in English: gossannoun ˈɡɒz(ə)nˈɡɑsən mass nounMining Geology An iron-containing secondary deposit, largely consisting of oxides and typically yellowish or reddish, occurring above a deposit of a metallic ore. Example sentencesExamples - Some of these veins reached the surface where, in the enclosing gossan, the stibnite has been subjected to oxidation.
- Most are free of matrix, although some of the paler green or greenish-yellow groups are on gossan and are associated with cream to bluish cerussite.
- Here unusually lustrous crystals to 2.5 cm across occurred in limonite-malachite gossan.
- In deposits that have been uplifted and exposed on land, the upper sulphides and oxides are invariably oxidized and weathered to a variety of secondary minerals (‘gossan’) by circulating meteoric water.
- It was found in gossan from a dump of one of the small mines on the southeastern side of the mountain on the World's Fair claim group.
Origin Late 18th century: of unknown origin. Definition of gossan in US English: gossannounˈɡäsənˈɡɑsən Geology Mining An iron-containing secondary deposit, largely consisting of oxides and typically yellowish or reddish, occurring above a deposit of a metallic ore. Example sentencesExamples - In deposits that have been uplifted and exposed on land, the upper sulphides and oxides are invariably oxidized and weathered to a variety of secondary minerals (‘gossan’) by circulating meteoric water.
- It was found in gossan from a dump of one of the small mines on the southeastern side of the mountain on the World's Fair claim group.
- Here unusually lustrous crystals to 2.5 cm across occurred in limonite-malachite gossan.
- Most are free of matrix, although some of the paler green or greenish-yellow groups are on gossan and are associated with cream to bluish cerussite.
- Some of these veins reached the surface where, in the enclosing gossan, the stibnite has been subjected to oxidation.
Origin Late 18th century: of unknown origin. |