Sulphide mineralisation and hydrocarbon migration in North Sea oilfields

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Authors:Baines, S. J.; Burley, S. D.; Gize, A. P.
Author Affiliations:Primary:
University of Manchester, Manchester, United Kingdom
Université de Nancy I, France
Volume Title:Source, transport and deposition of metals
Volume Authors:Pagel, Maurice, editor; Leroy, Jacques L.
Source:p.507-510; 25th anniversary meeting of the Society for Geology Applied to Mineral Deposits, Nancy, France, Aug. 30-Sept. 3, 1991, edited by Maurice Pagel and Jacques L. Leroy. Publisher: A. A. Balkema, Rotterdam, Netherlands
Publication Date:1991
Note:In English. 14 refs.; illus. incl. sketch maps
Summary:Genetic models for Mississippi Valley type Pb-Zn-Fe-S deposits often suggest a relationship between hydrocarbons and the ore mineralization. This association can often only be inferred from the presence of hydrocarbons trapped within fluid inclusions. In the outer Moray Firth the mineralization is concentrated within the oil zone of hydrocarbon reservoirs so the geology of this area may be used to evaluate the direct association of Pb-Zn-Fe-S ores with hydrocarbon generation. The texture and chemistry of the sulphide mineralization is very variable on both a local and regional scale. Sphalerite shows greatest variation in samples from differing structural levels. Fluid inclusion studies indicate that mineral precipitation took place at minimum T of 70-120 degrees C from complex brines of variable salinity. [R.E.S.]
Subjects:Base metals; Economic geology; Hydrocarbons; Iron ores; Lead ores; Metal ores; Migration; Mineral deposits, genesis; Mineralization; Mississippi valley-type deposits; Ore-forming fluids; Organic compounds; Petroleum; Sulfides; Zinc ores; Atlantic Ocean; Europe; Great Britain; Moray Firth; North Atlantic; North Sea; Scotland; United Kingdom; Western Europe
Abstract Numbers:93M/360
Record ID:1992080206
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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