FANDOM


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.

In the 19th and 20th centuries gossans were important guides to buried ore deposits used by prospectors in their quest for metal ores.[1] 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.

NameEdit

The name gossan appears to come from Cornish miner's slang.[2] It comes from the Cornish gossen, from gōs meaning "blood", from Old Cornish guit.[3] The terms "iron cap" and "iron hat", common in America,[2] are direct translations from the German "eisenhut", which term was also used in America.[2]

NotesEdit

Template:Reflist

ReferencesEdit

  • Guilbert, John M. and Charles F. Park, Jr (1986) The Geology of Ore Deposits, W. H. Freeman, pp 799-830, ISBN 0-7167-1456-6

Cite error: <ref> tags exist, but no <references/> tag was found

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.