Winter Drill program. Pretty impressive drilling program underway now thru April 2017 per the company's Dec 23rd, 2016 update: http://mawsonresources.com/news/news-releases/2016/mawson-update-rajapalot-winter-drill-program-ongoing-12-23
Drilling is done on frozen ground in winter at this project and they have completed 151 of 700 planned Base-of-Till drill holes for this winter's program. The deeper diamond drilling program plans 50 holes for 10,000 meters total or about 200 meters per drill site. A total of 40 workers will be employed.
Very ambitious program - well planned and funded. Hope the surface and relatively shallow assays to date are borne out at depth. That is the key to feasibility
Per a prior release: "Drill holes will average between 150 and 250 metres long with some holes up to 500 metres down-hole depth as required."
I see in some of the images equipment from ADC and here is info on the ADC website about the different types of drilling they provide. ADC - for Arctic Drilling Company - is based in Finland. http://www.adcltd.fi/drilling-services/
I take it Base-of-till is a quick means of obtaining a shallow sample to identify targets which are than drilled to 200 or more meters with diamond drill rigs to get the familiar core samples for lab analysis.
I found this in a July 2016 release that explains more about the Base-of-Till drilling:
Base of Till (“BOT”) Drilling Various sampling methods are available for testing bedrock and dispersion of gold below glacial till. The method is dictated by the scale and objective of the geochemical survey. Mawson has chosen a 150 metre spaced local grid sampling survey, with the main goal is to map both the gold distribution and the associated geochemical signature of the hydrothermal alteration to define deeper drill targets, beneath an area that is 99% covered by 3-5 metres of glacial soils. A small, tracked percussion drill rig, with a flow-through bit, will drill through the glacial till and sample the till-bedrock interface (Figure 3).
Sounds like an impact or percussion drill that only needs to get to down to aruond 5 meteres to reach the glacial till/bedrock interface.
Kansas City MO