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1 1 I Report No. 70 1 I I 3 1 I 0 Crown copyright 7984 London 1984 BRITISH GEOLOGICAL SURVEY Natural Environment Research Council Mineral Reconnaissance Programme Regional geochemical and geophysical surveys in the Berwyn Dome and adjacent areas, North Wales Geochemistry D. C. Cooper, BSc, PhD Geophysics K. Rollin, BSc J. D. Cornwell, MSc, PhD with contributions on geology by M. F. Howells, BSc, PhD and mineralogy by D. J. Morgan, BSc, PhD A report prepared for the Department of Trade and fno’ustry
Page 1: _ . .._ - -- c- -2 - - _.a Natural
Page 7 and 8: . Mineral Reconnaissance Programme
Page 9 and 10: SUMMARY This report describes strea
Page 11 and 12: 45 40 36 w 30 25 20 Fig. 3: Map sho
Page 13 and 14: 30 25 2a . . . . . . b 0 . 0
Page 15 and 16: I Ordovician strata are believed to
Page 18 and 19: 1892; Oakley and Dines, 1940) indic
Page 20 and 21: ------Asp Correlation Coefficients
Page 22 and 23: Fig. 12: Distribution of cobalt in
Page 24 and 25: assumed (Skeels, 1963), then, with
Page 26 and 27: Pearson method (log transformed dat
Page 28 and 29: metres Ashgill Pen -y- garnedd Fm c
Page 30 and 31: The sampling pattern was constructe
Page 32 and 33: P 305 1 . 00 ,/’ 51 41 FIG.27: Co
Page 34 and 35: ‘T Permotrias C Carboniferous S S
Page 36 and 37: Table 4 Summary of highly significa
Page 38 and 39: T Permotrias : Carboniferous I Silu
Page 40 and 41: ‘T Permotrias 1 Carboniferous $ S
Page 42 and 43: correlation is attributed to the ou
Page 44 and 45: T Permotrias Carboniferous Silurian
Page 46 and 47: ‘T Permotrias . , Carboniferous ;
Page 48 and 49: 2 Base metal mineralisation near Co
Page 50 and 51: IT Permotrias Z Carboniferous i Sil
Page 52 and 53:
‘T Permotrias 1 Carboniferous j S
Page 54 and 55:
Table 6 Rock analyses Sample Nation
Page 56 and 57:
Permotrias Carboniferous Silurian d
Page 58 and 59:
the gorge is apparently fault contr
Page 60 and 61:
PT Permotrias c Carbonlferous - . .
Page 63 and 64:
IT Permotrias 1 Carboniferous ; Sil
Page 65 and 66:
. which could be responsible for th
Page 68:
Lithostratigraphic’ variation is
Page 75:
Road Stream with sample site W. Sim
Page 79:
Fig. 21: Summary of anomalous resul
Page 87:
290 Fig. 17: Plot of anomalous bari
Page 106:
111. ‘::t . 1::: 447. 2II. X:: !I
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