Comet Resources Ltd (ASX: CRL) has announced the discovery of two new, high-grade, graphite zones at its 100% owned Springdale Graphite Project in south Western Australia. The two new zones of high-grade mineralisation were identified along strike from current resources.
The company reported that high-grade intercepts include 10m @ 16.1% TGC from 40m incl. 7m @ 21.6% TGC and 7m @ 18.44% TGC from 34m and 6m @ 26.53% TGC from 53m.
The company said that the new discoveries suggest there is significant potential to grow the current resource base.
Comet said that drilling confirms a strong correlation between EM anomalies and high grade graphite horizons significantly improving future drill targeting.
The company also noted that out of the 26 Kilometres of prospective stratigraphy, less than 20% has been drill-tested, indicating the potential scale of the Project.
Springdale Graphite Project
The 100% owned Springdale graphite project is located approximately 30 kilometres east of Hopetoun in south Western Australia. The tenements lie within the deformed southern margin of the Yilgarn Craton and constitute part of the Albany-Fraser Orogen.
Comet owns 100% of the three tenement’s that make up the Springdale project, with a total land holding of approximately 220 square kilometres.
The company had recently discovered the high-grade Northern Zone and completed the Maiden Resource Estimate. Following this, Comet planned an RC drilling program to test two undrilled high-priority graphite targets.
Drilling Program and Target Areas
The company reported that the target areas were defined using aeromagnetic data to define stratigraphy prospective for graphite mineralisation.
Comet said that the review of the aeromagnetic data with existing drill hole information identified that graphitic horizons intersected in existing drilling were located in distinct magnetic lows.
The company said that targets were further refined by ground electromagnetic (EM) surveys completed by Southern Geoscience Consultants Pty Ltd. Several conductors of interest were identified in these surveys, two of which were successfully tested in the recent RC drilling program.
The drilling program included 11 shallow, reconnaissance-style, RC holes for a total of 651m.
High Grade Results
The company announced that the drilling was successful in discovering two new horizons of high-grade graphite mineralisation with an interpreted strike of approximately 3.5 km and 5 km, with mineralisation remaining open both along strike and down dip in both areas.
Key results reported include:
- 10m @ 16.1% total graphite content (TGC) from 40m including 7m @ 21.6% TGC from 41m;
- 9m @ 9.5% TGC from 21m including 1m @ 19.6% TGC from 22m and 2m @ 24.9% TGC from 24m; and
- 38 m @ 9% TGC including 1m @ 48.8% TGC.
Comet said that the drilling succeeded in solidifying the geophysical interpretation of prospective stratigraphy and confirming ground electromagnetic surveying as a useful tool for identifying high-grade graphite mineralisation.
It may be noted that the interpretation of the detailed aeromagnetic survey conducted September 2017 delineated 26 kilometres of stratigraphy deemed to be prospective for graphite mineralisation. Out of this, less than 20% of the identified stratigraphy has been drill tested, indicating the potential scale of the Project.
Now that the new graphitic horizons have been identified, Comet said that it is planning to focus on further defining the high-grade zones with additional RC and diamond drilling over the coming months.
Comet Resources CEO, Philippa Leggat said: “The shallow nature of the mineralisation in conjunction with the ability to use electromagnetic surveys to target high-grade mineralisation will aid our ability to costeffectively increase the size of and certainty around our Resources.