Tag Archives: Hydrothermal vent

Classic papers in Economic Geology: Fallick et al. (2001) – Bacteria were responsible for the magnitude of the world-class hydrothermal base metal base metal sulfide deposit at Navan, Ireland

Irish-type zinc-lead deposits represent a distinctive sub-class of the carbonate-hosted zinc-lead deposit family, having geological features and genetic models that are hybrids between sedimentary exhalative (SEDEX; also known as clastic zinc-lead deposits) and Mississippi Valley-type (MVT) deposits.  They are important … Continue reading

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Posted in Bacteria, Biogeochemistry, Carbonate-hosted deposits, Classic Papers, Economic Geology, Geochemistry, Geology, Geophysics, Ireland, Irish-type deposits, Lead, Mineral Resources, Seafloor, Seafloor Massive Sulfides, Sedimentary exhalative deposits, Sedimentology, Stable Isotopes, Zinc | Tagged , , , , , , , , , , , , , | Leave a comment

The origin of banding in banded iron formations (BIF)

Banded iron formations (BIF) and iron ore are globally important resources of iron that have very distinctive textures.  Well-preserved BIF contain iron-rich bands consisting of iron oxides (e.g., hematite, magnetite), iron silicates (e.g., stilpnomelane), and iron oxyhydroxides (e.g., greenalite), that … Continue reading

Posted in Banded Iron Formations, Economic Geology, Geology, Iron Ore, Mineral Resources, Submarine Volcanism | Tagged , , , , , , , | 2 Comments