Dear
Belinda,
I
am sorry for the delay in delivering this information. I have attached a
spreadsheet which is accurate to my knowledge. Please overwrite previous
coordinates as they are erroneous. I have already sent this through to Tim
Hutchins, but it must not have been updated, or there are duplicate
copies?
The
collars were picked up using a hand held GPS. The accuracy of these instruments
varies but I would allow up to 5m variation. Note that holes MURD005 to 007 have
not been rechecked since drilling, although they would fall within the 5m margin
of error in any case. Holes MURD005 to 010 were not part of the Round 1
Collaborative Drilling program, however, we included the core as it was of
interest to the NTGS geologists.
If
you have any further enquiries or if there is a problem with these coordinates
please let me know and we will try to help.
Regards,
Dave
David
Esser
Exploration
Manager
Bondi
Mining Ltd
ABN:
14 126 180 818
Ph:
07 3369 4000 F: 07 3369 4900
M:
0429 020 435
Email:
david.esser@bondimining.com.au
From: Belinda
Smith [mailto:Belinda.Smith@nt.gov.au]
Sent: Friday, 7 May 2010 4:31
PM
To: David Esser
Cc: Annette Souter
Subject:
MURD HOLES - differences in coordinates from
reporting
Hi
David,
Annette suggested you
were the contact person to clarify some confusion I have with supplied
coordinates for the MURD series holes that were drilled as part of the Round 1
and Round 2 Collaborations drilling programmes. I have found that all the
holes (except MURD002) have coordinate discrepancies and I’m not sure what is
correct. Attached are the coordinates taken from the Collaborations
reports (tables in the reports); spreadsheets attached to the reports plus
comparison against the scanned core submission
forms.
I am trying to make
sure that all coordinates are ‘correct’ so that errors aren’t propagated into
the HyLogger NVCL database or the corporate database and also to make sure that
other NTGS staff are confident that they are using the most accurate
coordinates.
The holes are marked
as surveyed by handheld GPS. However, it’s not clear what the level of
accuracy is (ie; is it +/- 2m?? or 20m??). Also, are the coordinates
planned, or were the holes surveyed after drilling?
Anything you can tell
me would be much appreciated, so that errors aren’t propagated and to alleviate
confusion.
Thanks,
Belinda Smith | Project Geologist - HyLogger
Northern
Territory Geological Survey | Dept of Resources
3rd Flr Centrepoint Building
| Smith Street | Darwin NT 0800
GPO Box 3000 | DARWIN NT | 0801 |
AUSTRALIA
Tel + 61 8 8999 5228 | Fax + 61 8 8999 5221
belinda.smith@nt.gov.au | www.nt.gov.au/dpifm/Minerals_Energy/Geoscience