 |
Flow diagram showing the possible
fluid migration pathways in the Cheshire Basin.
(Source: redrawn from Naylor et al). Some interesting questions
remain such as why the difference between the mid/west-Cheshire deposits and the
east Cheshire deposits. At the latter, lead is found in quantity which is
not present in the west.
(Left) Mineralisation
in situ. the photograph shows a section of roof in Engine Vein where a
primeval flood has disturbed a cracked-mud floor and copper carbonates have
penetrated around the clay clasts (i.e fragments). Malachite is also visible in the
laminations of the sandstone. |
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