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 (which are quartz-lined cavities retaining the shape of the dissolved ore minerals).

gossan, rust-coloured oxide and hydroxide minerals of iron and manganese that cap an ore deposit. Gossans form by the oxidation of the sulfide minerals in an ore deposit and they thus may be used as clues to the existence of subsurface ore deposits, especially if …

Gossans are the signposts that point to what lies beneath the surface. Gossans are exceedingly ferruginous rock, which is the product of oxidation by weathering and leaching of sulfide mineralization.

Jun 15, 2018 · Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein. In the 19^th and 20^th centuries gossans were important guides to buried ore deposits used by prospectors in their quest for metal ores.

Gossans are the normal end products of oxidation and leaching of iron-bearing sulfide deposits exposed to the surface environment by erosion. The principal oxidizing agent is atmospheric oxygen and the leaching is accomplished by descending ground waters of meteoric origin.

Nov 4, 2013 · Gossan is a term from mineral economics. The gossan may also be called iron cap. This is so because it denotes a concretion of iron hydroxides that has formed on top of sulphide mineral vein, where it reaches the surface. It forms during the supergene sulphide ore enrichment, when weakly acid surface water perloctaes through the mineral deposit.

The meaning of GOSSAN is decomposed rock or vein material of reddish or rusty color that results from oxidized pyrites.

Jun 4, 2018 · Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein. In the 19th and 20th centuries, gossans were important...

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 …

Based on observations at TAG, bedded ocher overlying mas-sive sulfide at Skouriotissa, Cyprus, has been reinterpreted as a submarine gossan (Herzig and others, 1991). Submarine and subaerial weathering processes are described in greater detail in “Weathering Processes,” Chapter 13, this volume.