Iron Sulphides Precipitated on Rocks

Iron Sulphides Precipitated on Rocks

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Caption: Iron sulphides (the minerals marcasite and pyrite) precipitated from hydrothermal fluids in rocks of the Haughton impact structure on Devon Island, Canada. The white, fluffy material is a mixture of sulphate minerals, including gypsum. The whole assemblage reflects both high-temperature fluid activity (the sulphides) and lower-T weathering and hydrolysis.

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Keywords: geology, gypsum, haughton impact structure, hydrolysis, hydrothermal, iron, iron sulfide, iron sulphides, marcasite, mineral, minerals, precipitate, pyrite, rock, science, sulfide, sulphide, weathering

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