J. A. Hodgson, M. D. Ture
The Tellus Border project is a geochemistry and airborne geophysical survey of the six northern counties of the Republic of Ireland, funded by the INTERREG IVA programme of the European Regional Development Fund. It is an extension of the successful Tellus project of Northern Ireland (http://www.bgs.ac.uk/gsni/tellus/). The project objective is to create a seamless cross‐border geo‐environmental baseline dataset incorporating new and existing data. This report outlines the merging procedure and reviews the main processing carried out to individual geophysical datasets. The new airborne data was collected within the border counties of Donegal, Leitrim, Sligo, Cavan, Monaghan and Louth in the Republic of Ireland (ROI).Surveying was carried out between October 2011 and July 2012. Previous airborne geophysical surveys were carried out across Northern Ireland (Tellus) in 2005 and 2006 (Beamish et. al, 2006 a,b,c) and a pilot study covering parts of the counties of Cavan and Monaghan in the ROI (Kurimo, 2006, GSI 2006 Internal report). All surveys measured magnetic field, electrical conductivity and gamma‐radiometric spectrometer data (primarily potassium, thorium and uranium). The same survey specifications were used for each survey to assist in the merging of the different data sets. Final merged data is to be released in February 2013. However due to need for further processing of the electrical conductivity data version 1 of this report will deal with only the final production of the magnetic and radiometric data. Version 2 of this report will include all data when it becomes available.
As the data falls within different jurisdictions it is subject to different agreements and levels of availability. All data within the ROI except for one area under commercial licence is free to all. Release of data from Northern Ireland is subject to data‐licensing, which is free to non‐profit organisations.
The full processing reports from the contractors who carried out the surveys are contained in appendices at the end of this report.