Monthly Archives: April 2013

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

Sedimentary origin of gold and uranium in the Archean Witwatersrand Supergroup, South Africa

New research by Depiné et al. published in Mineralium Deposita provides critical evidence to the origin of gold and uranium in the Archean Witwatersrand Supergroup in South Africa. The Witwaterstrand Basin in South Africa accounts for 40% of the world’s gold … Continue reading

Posted in Archean, Economic Geology, Geochemistry, Geology, Gold, Gold Deposits, Mineral Resources, Paleoplacer, Sedimentology, Uranium | 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

Recently published: Elements – One Hundred Years of Geochronology

This is more of a notification than a post.  The February issue of Elements magazine has a great collection of papers on One Hundred Years of Geochronology.  While geochronology is not a field of economic geology, it is a tool … Continue reading

Posted in Economic Geology, Geochemistry, Geochronology, Geology, Geophysics, Recently Published | Tagged , , , , , , | Leave a comment

Classic Papers in Economic Geology: Hekinian et al. (1980) – the first description of seafloor massive sulfide deposits

This is my first post in the classic papers series.  I have a passion for volcanogenic massive sulfide (VMS) deposits, so I thought it would be fun to write a short blog on a classic paper that described and documented … Continue reading

Posted in Classic Papers, Copper, Economic Geology, Geochemistry, Geology, Lead, Mineral Resources, Seafloor, Seafloor Massive Sulfides, Submarine Volcanism, Volcanogenic Massive Sulfides, Zinc | Tagged , , | Leave a comment

Bacteria, Oxygen, and Gold!

New research published in Economic Geology by Tomkins provides insight into the importance of atmospheric evolution and bacteria in controlling the distribution of orogenic gold deposits (and resources) during the planet’s history. Orogenic (mesothermal) gold deposits form from gold-bearing fluids that are … Continue reading

Posted in Bacteria, Biogeochemistry, Economic Geology, Geochemistry, Geology, Gold, Gold Deposits, Mineral Resources, Orogenesis, Tectonics | Leave a comment