Spectral Gamma Logging – Uranium Logging Example.

by | Borehole Wireline, Wireline Logging

SPECTRAL GAMMA LOGGING – URANIUM LOGGING EXAMPLE

URANIUM LOGGING EXAMPLE PROJECT:

The spectral gamma logging service was used on an Australian sedimentary uranium exploration project as part of an extensive geophysical logging suite which included total gamma, focussed resistivity, dual induction-conductivity, magnetic deviation, formation density and SP.

URANIUM LOGGING EXAMPLE AIM:

The geologist’s modelling prior to the project was that elevated total gamma signatures were related to Uranium mineralisation only. The aim of the spectral gamma logging was to identify if Thorium contributed to the elevated total gamma signatures. The presence Thorium over Uranium would change the economic parameters of the prospect.

URANIUM LOGGING EXAMPLE OPERATIONS:

To capture the full gamma signature is the respective electronic windows assigned to the spectral gamma probe a slow logging rate is required. To enhance operational productivity, the spectral gamma probe was run over the Uranium bearing interval, as identified by total gamma logging, only.

URANIUM LOGGING EXAMPLE BENEFITS:

The presence of Thorium in the Uranium bearing zones has been confirmed. This data has empowered the project geologists to make informed decisions on their drill program and project objectives.

Use of U/TH ratio indicates uranium exceeds Thorium in the Uranium bearing intervals.