HYC and the McArthur River region are located in northern Australia within the Northern
Territory on the eastern edge of the uBatten Trough" adjacent to the Emu Fault Zone (Fig.1).
The McArthur Region Geology is presented on Figure 1 and shows that the HYC
deposit lies to the east of the NE-plunging Barney Hill anticline and immediately west of the Western Fault Block which is bounded to the east by the Emu Fault Zone containing horsts
of Masterton Sandstone. The "Cooley Breccias" lie along the western edge of the Western Fault Block juxtaposed with the HYC sequence with unkown relationships that were the
focus of this study.
The HYC-Cooley drillholes logged in this study are listed in Table 1 and located on Figure 2.
Table 1 also indicates the holes that were quantitatively structurally logged, the orientation method applied and the detailed Plans and Sections that accompany this report.