Geopacific Resources (GPR) signs agreements to commence helicopter geophysical surveys at Fiji projects.
Media release 12 July 2010
Geopacific Resources NL (ASX: GPR) has completed agreements to commence helicopter geophysical surveys at it?s Fiji projects using Geotech Airborne Limited?s (Geotech) recently developed ZTEM electromagnetic system and a AS350B3 helicopter contracted from McDermott Aviation Pty Ltd.
The recently developed ZTEM system is state-of-the-art technology which is
able to map resistivity contrasts associated with structure and alteration that are
typically associated with porphyry copper systems and other large mineral
deposits to great depths, exceeding 1-2 kilometres. ZTEM has only recently
become commercially available in Australia and Geopacific will be first to use
ZTEM in Fiji.
Geopacific also intends to use Geotech?s award winning VTEM system at
several Fiji prospects where shallower, massive sulphide deposits are targeted.
Mobilisation of equipment has commenced and the surveys will take 6-8 weeks
to complete.
About ZTEM
The ZTEM or Z-Axis Tipper Electromagnetic system is an innovative airborne EM
system which uses the natural or passive earth fields as the source of transmitted
energy and does not require a man-made transmitter. The ZTEM survey
instrumentation consists of a single vertical-dipole receiver coil that is towed about
75m below a helicopter, at a 100m nominal flight height, and is flown over the survey
area in a grid pattern, similar to other regional airborne surveys.
ZTEM data is closely related to resistivity/conductivity mapping of the subsurface. In
some applications it has a depth of penetration for exploration of over 2,000 metres
and with the low frequency of 22 Hertz has penetration through conductive cover to
allow detection of large alteration systems typical of porphyry copper deposits.
About VTEM
Geotech?s VTEM is a time-domain airborne electromagnetic system which has a high
signal to noise ratio and excellent conductance discrimination for high conductance
targets. VTEM has been designed to detect and discriminate between moderate to
excellent conductors such as skarn or other massive sulphide deposit types using a
low base frequency, long pulse width, and derived B-Field.
For further information
Ian Pringle, Managing Director
(02) 9699 7311
ianp@geopacific.com.au.
An overview of Geopacific Resources NL can be viewed at www.geopacific.com.au.
Doug Macdonald
0424 255 959
Capital Group
Level 5, 55 Harrington St
The Rocks Sydney 2000
02 9252 3900