Peak District Mines Historical Society
Promoting and preserving mining heritage
(Registered charity No. 504662)

Geophysics, Soil Sampling and Survey at Lodge Moor Bole Site - July 2016

On Wednesday 6th July a party of PDMHS members convened on Lodge Moor to carry out Fluxgate Gradiometer and Resistivity Surveys of the site. A programme of Soil sampling was started at the same time. Rob and Boo Vernon provided the Fluxgate Gradiometer survey whilst Alan Powell organised the Resistivity survey. Richard Carr, Paul Smith, Phil Shaw, Adam Russell and Dave Williams assisted with the survey work, whilst David Kiernan and his son Tom commenced soil sampling. John Barnatt orchestrated the operation. We were joined at lunch time by Richard Smith and his wife Beryl. Richard is 'the expert' on bale smelting and lead slags in the Yorkshire Dales and the Editor if 'British Mining' the journal of NMRS. Three areas were laid out with grids for the surveys and work started. The rough terrain made hard work of tramping up and down the survey grids and by the end of the day the surveyors had had enough. Whilst looking around during the day splashes of lead were noted at one point of the site. 

On Thursday the 7th John Barnatt, David Kiernan, Tom Kiernan and Dave Williams reconvened on the site and met Nigel Sharpe, who had offered to carry out a sub-centimetre GPS survey of the site. David and Tom Kiernan carried on their soil sampling programme whilst Nigel, John and Dave carried out the GPS work.

The results from the survey were later worked on by Rob and Alan and their conclusions were as follows - (LM1, LM2 and LM3 refer to the three areas that were surveyed).

        The surveys were conducted in what can only be described as difficult physical conditions. The shallow geology seems to have been influenced the quality of earth resistance data in part, particularly on the crest of the hill (LM1) whilst the topographic changes generated an anomaly on LM3. Nevertheless some interesting data was collected with both techniques.

Figure 12 summarises the anomalies found on all three surveys. There are common linear anomalies identified by both geophysical techniques particularly on survey LM1, that have corresponding approximate positions and trends. They appear to be associated with areas of bare ground and burnt gritstone, and probably relate to structural elements.

Linear anomalies have also been identified on LM2, but there are significant differences between the anomalies on the fluxgate gradiometer and earth resistance data. There are also areas of strong magnetic responses.

Both the fluxgate gradiometer and earth resistance surveys (LM3) across the obvious area of slag seems to be fairly uniform. Neither technique shows the limits to the slag with any clarity but the fluxgate gradiometer does indicate that a roughly square anomaly exists on the south side of the data, with slightly elevated value, that seems to correspond to slightly higher earth resistance values. 

Clearly, the data, anomalies and interpretation are not consistent with any known survey data from other lead smelting sites, and only broad conclusions can be reached. Evidence on the ground (slag, burnt stone) does indicate that some form of smelting operation was conducted at the Lodge Moor site, and this evidence is reinforced to some extent by the geophysical anomalies identified.          

The low resolution (1.0m) survey as it stands can only be regarded as a reconnaissance survey to identify the main anomalies. Survey area LM1 is probably the most interesting and it is suggested that at some future date a higher resolution survey (0.5m) is conducted  over the southern two grid squares, as well as extending the survey grid in a southern direction. LM2 is also of interest, and would benefit from extending the reconnaissance grid both west and south. LM3 is well defined on the surface and may benefit from a higher resolution survey over the geophysical anomaly (i) at the southern end of the survey area. 

 To see the full Report - 2016-07 Lodge Moor geophysical report - final

So see larger versions of the photographs below - Click on them.

To return to the main narrative - Click here: The Project at Lodge Moor

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  • David and Tom Kiernan together with Phil Shaw augering
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