juvenile lapilli with an overall medium- to coarse-grained texture. Four to 40 m thick beds are observed with the contact relationships defined by the gradual change in grain size.
Figure 6-3: Plan views of the Star kimberlite unit distributions: Red line denotes approximation of claim boundary. Fort à la Corne Joint Venture property is to the north and west. Shore property is to the southeast. A.) Drill hole locations and EM outline which closely approximates of 0 metre kimberlite edge. Line A-A’ and B-B’ in Figure 6- 4 shows the location of cross-sections shown in Figure 6-5. (Note that b-f holes which contain eruptive phase are shown in solid blue) B.) Known extent of the Late Joli Fou-equivalent kimberlite. C.) Preserved extent of the Mid Joli Fou-equivalent kimberlite. D.) Preserved extent of the Early Joli Fou-equivalent kimberlite. Note the area to the west where the kimberlite has been removed by subsequent Mid/Late Joli Fou kimberlite eruption. E.) Defined extent of the Pense- equivalent kimberlite. F.) Extent of the CPK-equivalent phases within the Star Kimberlite complex. Note the removal of CPK by subsequent eruptions (particularly the Early Joli Fou kimberlite which has scoured troughs of kimberlite through the CPK towards the NE and the SE). Holes shown in red were not drilled deep enough to verify presence of CPK (Figure from Harvey et al., 2006).
The Pense Kimberlite (“PPK”) is restricted to the central and northeastern portions (Figure 6.3) of the Star Kimberlite. In the northeast, PPK is deposited directly on the Pense sandstone and, locally, the Pense mudstone (Zonneveld et al., 2004). Towards the central zone, the PPK appears to sit directly on Cantuar Formation sediments, indicating either scouring into the older Cantuar sediments and/or previous erosion/denudation of the Pense sandstone. The PPK is densely clast- supported and, in the coarser-grained varieties, is characterized by the relative abundance of
ilmenite megacrysts and the sub-equal abundance of armoured juvenile lapilli olivine macrocrysts) and 0.5 cm to 7 cm sized olivine macrocrysts.
(typically cored by The large olivine
macrocrysts commonly contain small garnet intergrowths and peridotite xenoliths. The PPK generally occurs as up to 15 m
are thus interpreted thick, well bedded,
to be micro- fine to very-
coarse fine to
grained pyroclastic kimberlite with very rare breccia medium-grained olivine enriched kimberlite sandstone
units. Cross-bedded, is observed locally.
P&E Mining Consultants Inc. NI 43-101 Technical Report No 159 Shore Gold Inc. - Star Diamond Project Resource Estimate Update
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