Twin’s Cargo delivers 4 macros

Twin Mining (TWG-T) is encouraged by early results from two holes collared on the Cargo 1 kimberlite pipe at the Jackson Inlet property in Nunavut.

The first hole tested the northwestern boundary of the pipe, and cut 83.2 metres of kimberlite. A second hole is believed to have tested the southwestern margin of the pipe, and intersected 148 metres of kimberlite from a down-hole depth of 30.4-178.3 metres. A 5-meter section from the hole, weighing 18.65 kg, returned 11 diamonds, including 4 macrodiamonds. Two of the macros measure greater than 1mm in at least one dimension and combine for a carat weight of 0.028 carats. The largest stone measures 2.05 by 1.48 by 1.12 mm; both were describe by Lakefield Research as fragments. The stones recovered stones are classified as gem quality and are white and transparent, similar to stones recovered from the Freightrain pipe about 4.2 km to the southwest.

Cargo 1 was discovered in August. The discovery hole, angled at minus 70, encountered kimberlite from 43 to 126.2 metres down-hole before stopping in limestone at 152 metres. The pipe has a geophysical signature measuring 140 metres in diameter. The kimberlite is an autolithic breccia, containing peridotite xenoliths. It intrudes a limestone sequence near the northern tip of Baffin Island in Nunavut Territory, not far from the Nanisivik zinc mine.

Results from caustic fusion analysis of six mini-bulk samples totalling 3 tonnes of Jackson Inlet core is slated to wrap up by February 2002.

Twin also reports that detailed review of flight line data in the neighbourhood of the Freightrain pipe has turned up two new possible kimberlite targets. Dubbed ANO 4C and 4D, the targets measure 90 and 200 metres in diameter, respectively. The company plans a program of airborne geophysical surveying on closer spaced flight lines.