Investigation of polymetallic mineralisation in Lower Devonian volcanics near Alva, central Scotland
Hall, I.H.S.; Gallagher, M.J.; Skilton, B.R.H.; Johnson, C.E.. 1982 Investigation of polymetallic mineralisation in Lower Devonian volcanics near Alva, central Scotland. Institute of Geological Sciences, 37pp. (WF/MR/82/053) (Unpublished)Before downloading, please read NORA policies.
The subsurface characteristics of three known occurrences of fracture-controlled mineralisation in the Lower Devonian Ochil Volcanic Formation near Alva, central Scotland, were tested by shallow boreholes. Target structures were intersected by each borehole, but they contain only minor amounts of baryte and geochemical enrichments of copper, arsenic and uranium. Differential fracturing within the variegated volcanic sequence and enhanced brecciation at fault intersections are principal controls. Earlier silver-cobalt mineralisation appears to have been followed by copperbarium mineralisation. The andesitic rocks of the volcanic pile represent a suitable source for the metals.
|Item Type:||Report (UNSPECIFIED)|
|Programmes:||BGS Programmes > Other|
|Funders/Sponsors:||Department of Industry|
|Additional Information:||This item has been internally reviewed but not externally peer-reviewed|
|NORA Subject Terms:||Earth Sciences|
|Date made live:||01 Nov 2010 13:43|
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