"The deposit underlies the Mt Mulligan plateau or mesa and is exposed at the circumference of the base of that landform. The plateau is approximately 4km x 16km and trends NW-SE.
The coal measures are at a depth of 450 – 650 metres from the top of the plateau. They are Middle Permian, overlain by Triassic claystones, sandstones and conglomerate and underlain by Middle Permian conglomerate. The measures are exposed (or under scree) at the circumference of the base of the plateau.
The deposit consists of five seams with an area of about 63 square km. The continuity of the seams across the deposit is evidenced by:
* the circumference exposure (notionally analogous to a drill hole every metre for the 40km length of the circumference of the plateau)
* two diamond drill holes in the northern (DDH2) and the southern (DDH1) central areas of the plateau (confirming continuity between the sides) and
* the records of the workings plus some cores taken from the vicinity of the workings (NS1-5), which all commenced from within the upper coal member (CM1A)."
MNM Price at posting:
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