RE: Drama here - making Pulsar seem more attractive18 Nov 2023 14:10
Depth of discovery well was 1778 feet. I will just answer this question then move on from Pulsar. Hoping to see good news from Tai 3 testing this week. Could be very exciting to get strong indication of a discovery and to see the helium concentrations on gas samples they hopefully obtain.
Helium Discovery on Pulsar project.
In 2011, a previous explorer was drilling a series of boreholes targeting nickel and platinum group element (PGE) mineralization when they unexpectedly encountered a pocket of high-pressure gas in at a depth of 1,778 feet (541m) in borehole LOD-6. The gas pressure was sufficient to blow the core tube and associated drill fluid out of the hole and is therefore considered to be an over- pressured reservoir. The borehole was allowed to flow with the expectation the pocket would be depleted in a matter of hours, however the gas flow persisted for four continuous days with no obvious drop in pressure. The gas flow velocity was measured using an anemometer designed for domestic wind speed, reaching its maximum speed recording of 150 km/hr prior to breaking under the gas pressure.
Two gas samples were collected from the flowing LOD-6 borehole. The samples were analyzed by Dr. Barbara Sherwood-Lollar at the University of Toronto and at Pace Laboratories. All samples showed some air contamination as can be expected given the underprepared field conditions in which they were collected. Nonetheless, gas compositions reported by the two labs were in good agreement, with the least air-contaminated sample composition [measurements included 10.5% helium, 0.1 % O2 and 2.4 % methane and other hydrocarbon gases]. After analyses of the gas confirmed that it was non-combustible [mainly CO2 and Nitrogen] , LOD-6 was sealed with bentonite and permanently abandoned.
Geology
The Topaz Project is located within the Mid-Continent Rift Zone (MCRZ) in northeastern Minnesota, USA. The MCRZ is a 1.1 billion-year-old rift that extends from Kansas through Minnesota and into western Ontario, Canada. The Topaz Project is situated within the Bald Eagle Intrusion (BEI) of the Duluth Complex, a large mafic igneous body that intruded into the Biwabik Formation of the Paleoproterozoic Animikie Group. The Duluth Complex can attain a thickness of over 15 km and is associated with the MCRZ.