Victoria University Antarctic Research Expedition Science and Logistics Reports 1984-85: VUWAE 29
Programme
Programme
page 4
Figure 2. A. Map of McMurdo Sound area, showing the main physiographic features, the location of MSSTS-1, and deep DVDP drill holes (numbers). X-Y locates the section shown in figure 2B.
B. Geologic section across McMurdo Sound (line X-Y in figure 2A). Offshore structure extrapolated from Iles and Dibble (1981) and Wilson et al. (1981). Faulting has been inferred from topography (Webb and Wrenn 1982) but has in places been confirmed by field observations (P.G.Fitzgerald, pers comm).
Figure 3. Growth is sea ice thickness at CIROS 1 compared with that at nearby DVDP 15 in 1975, a normal year.
The Butter Point camp operated successfully throughout the operation (mid-September to mid-November, 1984). The camp and its operation are described in some detail in the Manager's report (Stephenson, 1985).
NOTE: Regular surveys of the CIROS 1 site from late September to mid-November show that it did indeed freeze 'solid' after the 6 m of movement in early October and remained in place through several major storms (Fig. 7). This shows that the site can be safely occupied at least until mid-November even in a 'thin ice' year. Had this data been available early in the season we would have probably elected to proceed with the drilling of CIROS 1, though the unexpected failure of the floats would have almost certainly led to termination of the hole before target depth.