Greenridge Exploration Provides Technical Review of its Nut Lake Uranium Project in Thelon Basin, Nunavut - Seite 3

Lines for the 1979 geophysical surveys were spaced 100m apart with 24m to 50m station intervals.

VLF-EM Survey

• Several interesting anomalies resulted from the survey including a pattern indicating a north-northwesterly trending structure of interest.
• Anomalies are likely related to a fault zone, continuous with a VLF-EM anomaly.
• A major anomaly was identified from “L14W to L2S and 14E to 19E”. This anomaly is not known to be related to any specific feature and should be followed up on.
• Identification of north trending anomalies which may be related to structural or lithological features.

Magnetometer Survey

• Magnetic anomalies show less distinct north to northwesterly trends compared to VLF-EM map.
• Anomalies in northwest section related to syenitic intrusive rocks.
• Irregular pattern in this area possibly due to close-spaced dikes and lenses of mafic gneiss.
• A gravity survey is recommended to pair with both surveys moving forward.

Figure 2 - Regional Magnetics showing a strong NE-SW trending Fault³

Hyperspectral Survey

Helium is a decay product of Uranium and is an exploration vector for buried uranium deposits. Helium is released as a “daughter” product of radioactive decay as uranium breaks down into other elements. As helium is a very light element it migrates through the overburden and into the atmosphere. Where the release of helium is concentrated enough, it will have a spectral signature in specific wavelengths that can be seen by satellite sensors. These are in the Visible-Near Infra-Red (VNIR) and Short Wave Infra-Red (SWIR) wavelengths parts of the spectrum. The Sentinel-2 satellite data contains spectral bands which can be processed to identify areas with an anomalous helium spectral signature. A stronger spectral signature in the helium wavelength could be due to a buried radioactive source (Please see Figure 3).

• The survey identified 2 clusters with anomalous spectral responses that are coincident with a northeast-trending structure identified by geophysical surveys.
  
  
• These two target areas have not historically seen extensive exploration, and therefore warrant ground truthing to explain the helium response.
  
  

Figure 3 - Hyperspectral Survey

About The Nut Lake Property

The Project is located approximately 55km north of the Angulak Uranium Deposit² or 180Km southwest of Baker Lake, Nunavut in the Yathkyed Basin (a sub-basin of the prolific Thelon Basin) in Nunavut Territory, Canada. The Project consists of three contiguous mineral licences encompassing a total land area of approximately 4,036 hectares (~40km²).