Mineral Reconnaissance Programme Report
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Natural Environment Research Council Institute of Geological Sciences Mineral Reconnaissance Programme Report -4 A report prepared for the Department of Industry This report relates to work carried out by the Institute of Geological Sciences on behalf of the Department of Industry. The information contained herein must not be published without reference to the Director, Institute of Geological Sciences. D. Ostle Programme Manager Institute of Geological Sciences Nicker Hill, Keyworth, Nottingham NG12 5GG No.62 Mineral reconnaissance in the Northumberland Trough INSTITUTE OF GEOLOGICAL SCIENCES Natural Environment Research Council 1 Mineral Reconnaissance Programme Report No. 62 Mineral reconnaissance in the 1 Northumberland Trough 8 Geotog y 1and geochemistry J. H. Bateson, BSc, MIMM I C. C. Johnson, BSc, PhD, FGS Geophysics I A. D. Evans, BSc 0 Crown copyright 7983 I London 1983 A report prepared for the Department of Industry Mineral Reconnaissance Programme Reports 47 An airborne geophysical survey of the Whin Sill between Haltwhistle and Scats’ Gap, south 20 Geophysical field techniques for mineral exploration Northumberland 21 A geochemical drainage survey of the Fleet granitic 48 Mineral investigations near Bodmin, Cornwall. Part complex and its environs 3-The Mulberry and Wheal Prosper area 22 Geochemical and geophysical investigations north- 49 Seismic and gravity surveys over the concealed west of Llanrwst, North Wales granite ridge at Bosworgy, Cornwall 23 Disseminated sulphide mineralisation at Garbh 50 Geochemical drainage survey of central Argyll, Achadh, Argyllshire, Scotland Scotland 24 Geophysical investigations along parts of the Dent 51 A reconnaissance geochemical survey of Anglesey and Augill Faults 52 Miscellaneous investigations on mineralisation in 25 Mineral investigations near Bodmin, Cornwall. Part sedimentary rocks 1 -Airborne and ground geophysical surveys 53 Investigation of polymetaiiic mineralisation in Lower 26 Stratabound barium-zinc mineralisation in Dalradian Devonian volcanics near Alva, central Scotland schist near Aberfeldy, Scotland; Preliminary report 54 Copper mineralisation near Middleton Tyas, North 27 Airborne geophysical survey of part of Anglesey, Yorkshire North Wales 55 Mineral exploration in the area of the Fore Burn 28 A mineral reconnaissance survey of the igneous complex, south-western Scotland Abington - Biggar - Moffat area, south-central 56 Geophysical and geochemical investigations over Scotland the Long Rake, Haddon Fields, Derbysh’ire 29 Mineral exploration in the Harlech Dome, North 57 Mineral exploration in the Ravenstonedale area, Wales Cumbria 30 Porphyry style copper mineralisation at Black 58 Investigation of small intrusions in southern Stockarton Moor, south-west Scotland Scotland 31 Geophysical investigations in the 59 Stratabound arsenic and vein antimony mineralisa- Closehouse -Lunedale area tion in Silurian greywackes at Glendinning, south 32 Investigations at Polyphant, near Launceston, Scotland Cornwall 60 Mineral investigations at Carrock Fell, Cumbria. 33 Mineral investigations at Carrock Fell, Cumbria. Part Part 2 -Geochemical investigations 1 -Geophysical survey 61 Mineral reconnaisance at the Highland Boundary 34 Results of a gravity survey of the south-west with special reference to the Loch Lomond and margin of Dartmoor, Devon Aberfoyle areas 35 Geophysical investigation of chromite-bearing 62 Mineral reconnaissance in the Northumberland ultrabasic rocks in the Baltasound-Hagdale area, Trough Unst, Shetland Islands 36 An appraisal of the VLF ground resistivity technique as an aid to mineral exploration 37 Compilation of stratabound mineralisation in the Scottish Caledonides 38 Geophysical evidence for a concealed eastern extension of the Tanygrisiau microgranite and its possible relationship, to mineralisation 39 Copper-bearing intrusive rocks at Cairngarroch Bay, south-west Scotland 40 Stratabound barium-zinc mineralisation in Dalradian schist near Aberfeidy, Scotland; Final report 41 Metalliferous mineralisation near Lutton, ivybridge, Devon 42 Mineral exploration in the area around Culvennan The Institute of Geological Sciences was formed by the Fell, Kirkcowan, south-western Scotland incorporation of the Geological Survey of Great Britain 43 Disseminated copper-molybdenum mineralisation and the Geological Museum with Overseas Geological Surveys and is a constituent body of the Natural Environ- near Balluchulish, Highland Region ment Research Council 44 Reconnaissance geochemical maps of parts of south Devon and Cornwall Bibliographic reference Bateson, J. H. and others. 1983. Mineral 45 Mineral investigations near Bodmin, Cornwall. Part reconnaissance in the Northumberland Trough Mineral 2 -New uranium, tin and copper occurence in the Reconnaissance Programme Rep. Inst. Geol. Sci., NO. 62 Tremayne area of St Columb Major 46 Gold mineralisation at the southern margin of the Printed in England for the Institute of Geological Sciences Loch Doon granitoid complex, south-west Scotland by lmediaprint I CONTENTS 19 Copper contents of panned concentrates I from the northeastern part of the survey Summary 1 area 25 20 Lead contents of panned concentrates from Introduction 1 the northeastern part of the survey area 26 I Geology 3 21 Zinc contents of panned concentrates from Introduction 3 the northeastern part of the survey area 27 Stratigraphy 3 22 Barium contents of panned concentrates from I Igneous activity 3 the southern part of the survey area 28 Structure 9 23 Copper contents of panned concentrates from the southern part of the survey area 29 History of mining 9 24 Lead contents of panned concentrates from the I Previous exploration 9 southern part of the survey area 30 25 Zinc contents of panned concentrates from the Landsat imagery 11 southern part of the survey area 31 I Geochemical survey 11 26 Means and ranges for Ba, Cu, Pb and Zn in Introduction 11 panned concentrates and stream sediments 32 Drainage basin reconnaissance 14 27 Six areas of soil sampling in the I Soil sampling 35 Northumberland Trough 34 28 Comparative values between shallow auger and Geophysical surveys 44 deeper sampling in Area 3 (Newbrough) 36 Airborne survey 44 29 Pb, Zn and Ba in soils from Area 1 Ground surveys 45 I (Melkridge) 3 8 Drilling 60 30 Pb, Zn and Ba in soils from Area 2 (Brown Moor) 39 Conclusions and recommendations 68 I 31 Pb, Zn and Ba in soils from Area 3 Acknowledgements 69 (Newbrough) 40 32 Pb, Zn and Ba in soils from Area 4 (Torneys References 69 I Fell) 41 Appendix 1 Geochemical sampling methods 71 33 Pb, Zn and Ba in soils from Area 5 (Settling- stones) 42 Appendix 2 Methods of chemical analysis 71 34 Results from soil survey in Area 6 (Ewesley) 43 I Appendix 3 Table of anomalous panned 35 Location of geophysical surveys: key map 46 concentrate samples 7 2 36 Aeromagnetic contour map: Settlingstones Mine and surrounding area 48 Appendix 4 List of chemical analyses (micro- 37 Total magnetic field profiles at Melkridge 49 I fiche) In pocket 38 Magnetic traverses and anomalies north-west of the Melkridge survey area 50 39 Traverse locations and total magnetic field FIGURES I profiles in the Settlingstones area 51 Area of investigation 2 40 Location map for geophysical traverses at Geography of Lower Carboniferous 4 Brown Moor 53 Geological map of Northumberland 5 I 41 Total magnetic field profiles at Brown Dinantian succession in Northumberland 6 hl00r 54 Comparative Tournaisian succession 7 42 Location map for geophysical traverses at Comparative Visean succession 8 Newbrough and Torneys Fell 55 1 Mints, trials and mineral shows in 43 Total magnetic field profiles at Torneys Northumberland 10 Fell 57 8 Main elements of structure from Landsat 44 Total magnetic field profiles at Newbrough 58 imagery 12 I 45 a) hIode profiles of total magnetic field anomaly 9 Sample sites for stream sediment samples 13 LLC~OSSa fault in the \t’hin Sill 10 Panned concentrate data - Barium IG b) An interpretation of the Ncwbrough 11 Panned concentrate data - Copper 17 I magnetic anomal) 59 12 Panned concentrate data - Lead 18 46 Locations of ,“;cwbrou$ boreholes 6 1 13 Panned concclntrate data - Zinc 19 -l7 Element distributions and magnetic suscept- 14 Stream sediment data - Barium 20 ibilit). measurements from Newbroqh bore- I 15 Stream sediment data - Copper 21 hole 1 62 16 Stream sediment data - Lead 22 48 I:lcmc~nt distributions and magnetic susccptibil- I7 Stream scdimcnt data - Zinc 23 ity measurements from Ncwbrough borchole 2 18 Barium contents of panned concentrates 1 63 from the northeastern part of the sulvc’) D arca 24 I 49 Element distributions and magnetic susceptibil- ity measurements from Newbrough borchole 3 64 50 Element distributions and magnetic susceptibil- ity measurements from Newbrough borehole 4 65 51 Interpretation of Newbrough borchole data 67 TABLES Inter-clement correlation coefficients signifi- cant at the 99% confidence limit for 1875 panned concentrates 33 A correlation coefficient matrix based on 2002 stream sediment samples 35 Values of lead, zinc and barium in soils 35 Soil sample depths 35 Comparison of deep (Cobra) and shallow (hand auger) soil samples (Newbrough) 37 Summary statistics for soil samples from Ewesley area 37 Details of boreholes at Newbrough 60 Some trace element data for samples of unaltered and altered Whin Sill 68 SUMMARY Several of these linear magnetic anomalies were further examined by geochemical (soil sampling) A geochemical and geophysical reconnaissance and ground-geophysical techniques. The geo- programme