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A demonstration of an affinity between pyrite and organic matter in a hydrothermal setting
Stockholm University, Faculty of Science, Department of Geological Sciences.
Stockholm University, Faculty of Science, Department of Geological Sciences.
2011 (English)In: Geochemical Transactions, ISSN 1467-4866, E-ISSN 1467-4866, Vol. 12, 3- p.Article in journal (Refereed) Published
Abstract [en]

One of the key-principles of the iron-sulphur world theory is to bring organic molecules close enough to interact with each other, using the surface of pyrite as a substrate in a hydrothermal setting. The present paper explores the relationship of pyrite and organic matter in a hydrothermal setting from the geological record; in hydrothermal calcite veins from Carboniferous limestones in central Ireland. Here, the organic matter is accumulated as coatings around, and through, pyrite grains. Most of the pyrite grains are euhedral-subhedral crystals, ranging in size from ca 0.1-0.5 mm in diameter, and they are scattered throughout the matrix of the vein calcite. The organic matter was deposited from a hydrothermal fluid at a temperature of at least 200 degrees C, and gives a Raman signature of disordered carbon. This study points to an example from a hydrothermal setting in the geological record, demonstrating that pyrite can have a high potential for the concentration and accumulation of organic materials.

Place, publisher, year, edition, pages
2011. Vol. 12, 3- p.
National Category
Other Earth and Related Environmental Sciences
Research subject
Geochemistry
Identifiers
URN: urn:nbn:se:su:diva-61756DOI: 10.1186/1467-4866-12-3ISI: 000287518400001OAI: oai:DiVA.org:su-61756DiVA: diva2:437441
Available from: 2011-08-29 Created: 2011-08-29 Last updated: 2017-12-08Bibliographically approved

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