The U-Pb ages of 496 [+ or -] 5 Ma from titanite in an amphibolite
layer in the paragneiss (Dunning et al.
The recent RC drill program undertaken by QMC in 2010 indicates the gold is controlled primarily by a near E-W trending shear zone developed along the contact between the amphibolite
unit (marker bed) and underlying phyllite and schist sequence.
The graphical analysis of greenschist to amphibolite
facies mineral assemblages in metabasites.
In the southern metamorphic belt, amphibolite
and amphibolitic gneiss with lit-par-lit leucogranite sheets, similar to some components in the Arichat belt, outcrop on Green Island (Fig.
The Emily gold showing comprises gold mineralization in leucogabbro, associated with disseminated pyrrhotite and arsenopyrite in upper amphibolite
facies, deformed gneisses of the Early Proterozoic Kisseynew gneiss belt.
Platt Creek Samples: June 2009 Drill area Sample Location Type Rock Unit Alteration % U(3)O(8) SB044 Platt Creek Boulder Amphibolite
The pelitic unit may contain staurolite, garnet, and andalusite, whereas tourmaline and rare holmquistite (Hutchinson 1982) occur in the amphibolite
adjacent to the pegmatite lenses.
The mineralization is located directly beneath Quaternary alluvial cover and is hosted along an iron oxide-rich, gently dipping zone within strongly weathered quartz-muscovite-feldspar gneiss and amphibolite
The volcanic rocks of this unit commonly exhibit welded and flow-banded textures and are intruded by granite and amphibolite
and felsic porphyry dykes (Barr and White 2001a).
Table 1 Mineralized Amphibolite
from first drill target area.
The mafic component varies from rare examples of layered gabbro, to hornblenderich amphibolite
to hornblende-plagioclasc rocks with minor quartz.
The orthogneiss has an igneous crystallization age of 605 [+ or -] 3 Ma, and was metamorphosed to amphibolite
facies at 564 [+ or -] 6 Ma (Bevier et al.