RJK Discovers Its 8th New Kimberlite in Cobalt Mining Camp

RJK Explorations Ltd. has discovered a new kimberlite south of the HSM kimberlite, associated with the Cross Lake Fault, in its ongoing reverse circulation (RC) drilling program in Lorrain Township, 10 km south of the Historic Cobalt Mining Camp. A small historical quarry, previously used for logging roads, is located above the kimberlite and within the electromagnetic (EM) conductance anomaly, and so the Company has named this discovery the "Gravel Pit " kimberlite.

Nipissing Diamond Project

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A total of 9 RC holes intersected kimberlite located within the southern EM conductance anomaly with a maximum thickness of 24 m and averaging 15.6 m. Due to time and budget constraints, the company did not drill the north end of the EM conductance anomaly, but plans to revisit the area at a later date. The Gravel Pit kimberlite was tested after RJK completed delineation drilling of the Robin's Place and HSM kimberlite bodies for bulk sampling purposes, each of which were previously identified in RJK's 2020 diamond drilling program. 

At Robin's Place, a total of six RC drill holes intersected kimberlite in all holes located within the EM conductance signature with a maximum thickness of 53.4 m and averaging 38.8 m. Glacial esker deposits unconformably overlying the kimberlite layer ranges in thickness from 2.5m to 4.5m averaging 3.7 m. At HSM, a total of 13 RC holes intersected kimberlite in all holes located within the EM conductance signature with a maximum thickness of 59.8 m and averaging 31.7 m. Glacial esker deposits unconformably overlying the kimberlite layer ranges in thickness from 1.5 m to 13.5 m averaging 5.5 m. At the Gravel Pit, glacial esker deposits unconformably overlying the kimberlite layer ranges in thickness from 6 m to 23.5 m averaging 15.4 m. Geologic logging of the esker materials indicates considerable reworking of the upper contact of the kimberlite bodies by post-eruption glacial melt waters exploiting the Cross Lake Fault basin. Extreme scouring by esker outwash channels is more evident at the HSM and Gravel Pit where esker thicknesses vary from 5.5 m to 15.4 m. All RC drill holes were terminated in granite, Lorrain formation quartzite or Nipissing diabase.

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