my guess on the halt

You have to read the trading halt in conjunction with the quarterly report. Although the quarterly report is only up until the 30th Sept. the wording on Torrens is crucial. Impending and imminent are the words used to describe the drilling (i.e. it's gonna happen soon).

Furthermore the trading halt is regarding 'a land based drill hole at Torrens' which implies information regarding a singular target not the more general drilling campaign.
Correct me if i'm wrong but doesn't TD004 refer to drill hole number 4?
**************************************
Quarterly Report extract:

The impending drilling will target large high
density, low susceptibility bodies identified by
inversion modelling of gravity and magnetic
data.

Straits Resources has now established an
exploration camp on Andamooka Island and
the drilling rig is on site in preparation for the
imminent commencement of the program of
deep diamond drilling.