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Abstract

Fluid inclusions in granite quartz from SW England provide a record of the complex and protracted hydrothermal history of this important metallogenic province. Regional variations in terms of the different types of inclusions can be correlated on an inter-pluton scale with both the texture of the host granite and the extent to which it is mineralized. On an intra-granite scale those areas where mineralization is particularly pronounced show a higher overall inclusion abundance than areas where little or no mineralization is known to occur. The types of fluid inclusion most commonly related to Sn - W - Cu mineralization are halite-free, moderate temperature inclusions. Inclusions containing visible CO-2 at room temperature are restricted to two localities in SW England. Both of these contain stockwork/vein-swarm tungsten mineralization. These regional "fluid inclusion anomalies' show that fluid inclusion petrography using a simple petrographic microscope has potential application in the field of mineral exploration.

Additional information

Authors: RANKIN A H DEPARTMENT OF GEOLOGY, IMPERIAL COLLEGE, LONDON (UK) ALDERTON D H M DEPARTMENT OF GEOLOGY, CHELSEA COLLEGE, LONDON (UK) , DEPARTMENT OF GEOLOGY, IMPERIAL COLLEGE, LONDON (UK);DEPARTMENT OF GEOLOGY, CHELSEA COLLEGE, LONDON (UK)
Bibliographic Reference: EUR 8617 EN-FR (1984) FS - REPRINTED FROM MINERALIUM DEPOSITA, SPRINGER-VERLAG PP. 335-347, BFR 400 , EUROFFICE, LUXEMBOURG, POB 1003
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