September 10, 2018 News
Lithoquest has discovered kimberlite on its first drill program at the North Kimberley Diamond Project.
The 100% owned project covers 1,500 km2 and is located in the northern portion of the Kimberley Plateau, approximately 225 km from Kununurra. The Gibb River and Kalumburu Roads provide ground access to the project area from either Derby or Kununurra. Locally, the Plateau is flat-lying and characterized by escarpments and isolated mesas.
In a few short months, Lithoquest has discovered kimberlite in five far-spaced locations. Four kimberlite rock samples with indicator minerals and micro-diamonds recovered, and now Kimberlite core from our very first drill program.
Key highlights of the project include the following:
- Lithoquest made a kimberlite discovery on its first drill program
- The area is prospective for economic diamond deposits – the Ellendale and Argyle diamond mines are associated with the Kimberley Plateau and bulk sample tests were conducted on the local Ashmore and Seppelt kimberlites (Seppelt has reported a grade of 2.25 cts/t*)
- Kimberlite indicator minerals with high-interest chemical compositions were recovered from rock samples collected at four locations in 2017. The rocks sampled are believed to be derived from a local source.
- Gem quality macro diamonds have been recovered from documented stream samples throughout the area, including a 1.73 ct diamond.
- The project can be accessed by a seasonal road and is located on tide-water.
Kimberlite was discovered at target 1804, which contains coincident ground magnetic and gravity anomalies where indicator minerals, including diamonds, were recovered in historical loam samples. The discovery drill hole was oriented at an azimuth of 114° degrees and inclined at -75°. Extensively clay-altered basalt was intersected from the top of the hole at 5.7 metres to 100.5 metres, followed by kimberlite breccia to 124.3 metres. Immediately following the kimberlite intersection was a carbonatized basalt which grades to a fresh basalt at 138.4 metres. Fresh basalt was present to the end of the hole at 156.6 metres.
A second hole at 1804, drilled at an inclination of -50 degrees, was collared 10 metres from the first drill hole along the same 114° azimuth. The second hole encountered sandstone from 6.9 metres to 11.1 metres followed by clay-altered basalt to 61.7 metres and fresh basalt to the end of the hole at 69.1 metres.
The kimberlite breccia is characterised by xenoliths of the local volcanic and sedimentary sequence. The core will be shipped to Canada for detailed observation, laboratory analysis and diamond testing. Diamond results are expected during Q4 of 2018.
Results from ground geophysical surveys over target 1804 and the textures observed in the kimberlite suggest the occurrence is a pipe; however, additional drilling and petrographic work will be required to definitively determine the geometry and nature of the body.
Kimberlite discovered at Target 1804
Kimberlite discovery at Target 1804
Ground magnetic geophysical target: 1804
Gravity geophysical target: 1804
Target 1702 is a 3 Ha sized oblate geomorphic feature associated with a NE trending structure. The local bedrock is Proterozoic aged sandstone overlying volcanics. Rock samples from exposed bedrock in a weathered drainage at 1702 display porphyritic textures similar in appearance to olivine macrocryst kimberlite. Float in the area is common and exhibits silicified skeletal or fragmental textures. Samples from the feature yielded pyrope garnet, chrome diopside, picroilmenite and chromite. The presence of G10D garnets and the geothermobarometry determined from chrome diopside demonstrates the minerals formed in the diamond stability field.
CEO Bruce Counts and Principal Technical Consultant, Dave Skelton
Drill rig used on phase 1 of drilling program
Trenching at Target 702, during 2018 exploration program
Prospecting at Target 702
Weathered rock found while prospecting in 2017
Conducting a gravity geophysical survey at the beginning of the 2018 program
Large drill rig mobilized to camp for phase 1 drilling, 2018
Loam sampling at Target 702
Target 702 weathered rock
Target 1605 is a 200m x 80m topographic high that is adjacent to a NE structure feature. The surrounding area is largely sandstone, while the feature is characterized by red-brown pisolitic soils and ferruginous rock float. The float has fragmental textures and samples reported pyrope garnet and picroilmenite.
*The results are historic in nature and have not been validated, thus they are not necessarily indicative of potential results relating to any future exploration activities on the property. Mr. Bruce Counts, CEO of Lithoquest and a Qualified Person as defined by NI 43-101, has reviewed and approved all information on this page.