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- Q639293 subject Q6984762.
- Q639293 subject Q7153706.
- Q639293 abstract "Gossan (eiserner hut or eisenhut) is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein. In the classic gossan or iron cap all that remains is iron oxides and quartz often in the form of boxworks, quartz lined cavities retaining the shape of the dissolved ore minerals. In other cases quartz and iron oxides, limonite, goethite, and jarosite, exist as pseudomorphs replacing the pyrite and primary ore minerals. Frequently gossan appears as a red stain against the background rock and soil due to the abundance of oxidized iron and the gossan may be a topographic positive area due to the abundance of erosion resistant quartz and iron oxides. Although most gossans are red, orange, or yellow, black gossans from manganese oxides such as pyrolusite, manganite, and especially psilomelane form at the oxidized portion of Mn-rich mineral deposits.In the 19th and 20th centuries gossans were important guides to buried ore deposits used by prospectors in their quest for metal ores. An experienced prospector could read the clues in the structure of the gossans to determine the type of mineralization likely to be found below the iron cap.".
- Q639293 wikiPageWikiLink Q102798.
- Q639293 wikiPageWikiLink Q134435.
- Q639293 wikiPageWikiLink Q1650350.
- Q639293 wikiPageWikiLink Q179177.
- Q639293 wikiPageWikiLink Q189703.
- Q639293 wikiPageWikiLink Q193565.
- Q639293 wikiPageWikiLink Q25289.
- Q639293 wikiPageWikiLink Q401047.
- Q639293 wikiPageWikiLink Q411168.
- Q639293 wikiPageWikiLink Q413293.
- Q639293 wikiPageWikiLink Q419315.
- Q639293 wikiPageWikiLink Q43010.
- Q639293 wikiPageWikiLink Q50769.
- Q639293 wikiPageWikiLink Q6984762.
- Q639293 wikiPageWikiLink Q7153706.
- Q639293 wikiPageWikiLink Q721849.
- Q639293 wikiPageWikiLink Q731.
- Q639293 wikiPageWikiLink Q80026.
- Q639293 wikiPageWikiLink Q82682.
- Q639293 comment "Gossan (eiserner hut or eisenhut) is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein. In the classic gossan or iron cap all that remains is iron oxides and quartz often in the form of boxworks, quartz lined cavities retaining the shape of the dissolved ore minerals. In other cases quartz and iron oxides, limonite, goethite, and jarosite, exist as pseudomorphs replacing the pyrite and primary ore minerals.".
- Q639293 label "Gossan".