'Institute of Geological Sciences of the National Academy of Sciences of Ukraine'
Abstract
Regional geochemical reconnaissance by stream sediments and panned
concentrates was undertaken over an area of 850 km
2
of south-west Scotland.
Rocks of Ordovician to Permian age are exposed within the area but the major
part is occupied by the Criffel-Dalbeattie granodiorite complex.
Multi-element analysis of the samples collected demonstrates
patterns of trace element distribution related to the geology and
Broad-scale patterns in the distribution of some elements reflect compositional
anumber of
mineralisation.
variations in both the Lower Palaeozoic turbidite sequence and the Criffel-
Dalbeattie granodiorite complex, both of which may be sub-divided into specific
units on the basis of the geochemical data.
The follow-up of copper anomalies in drainage samples from the Black
Stockarton Moor area led to the discovery of porphyry-style copper mineralisation
within an arcuate belt at least 5 km by 1 km within the Black Stockarton Moor
subvolcanic complex and of related disseminated copper mineralisation at Screel
Burn. The area to the west of the Criffel-Dalbeattie plutonic complex is also
characterised by relatively high boron levels in stream sediments reflecting
the widespread occurrence of tourmaline both in association with and peripheral
to the copper mineralisation. Vein mineralisation, usually containing baryte
in addition to base.metals, is also identifiable from the drainage survey at
the eastern margin of the Criffel-Dalbeattie granodiorite; in association with
the Lower Carboniferous rocks along the Solway coast; and within the Lower
Palaeozoic turbidites in the west of the area
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