Results
- Geophysics
(last updated 04/08/2009)
In 2001, 2-pole-dipole IP lines were completed by PD Peru to determine the response from known mineralized zones. In 2002 through 2004, Quantec Geosciences Peru S.A.C. conducted total field magnetic, IP, and resistivity surveys to identify additional drill targets.
In June 2004, PD Peru completed a ground magnetics survey over an area covering both the Haquira West and East zones of mineralization. This survey was conducted using 100-m spaced lines with measurements collected every 10 m along those lines.
There appeared to be a correlation between high magnetics and some of the better grade-thickness values; especially in the in the higher-grade zone in the northern portion of the Haquira West Zone. Although this relationship is not well understood, it appears that higher magnetic signatures may be related to magnetite-calc-silicate style alteration developed within finer-grained sedimentary rock units, which also carry some of the higher-grade copper values. Therefore, based on this apparent association, additional ground magnetic surveys where completed to extend the area of coverage.
In June 2006, Quantec Geoscience Peru SAC completed a ground magnetic survey over the Haquira project for Antares. The 2006 survey was designed to expand the peripheral extents of the previous 2004 PD Peru survey (also conducted by Quantec) in order to better understand the aforementioned associations of magnetics to known higher grade mineralization, and to better delineate potentially important structures and porphyry intrusive bodies, be they dikes or stocks.
The survey consisted of 60 north-south lines, each of varying length and separated by a distance of 150 m. Ground magnetic data were collected at 25-m intervals along the lines. In total, 227.8 km of ground magnetic data were collected. The ground magnetic data were shown in a series of maps, (a) total magnetic field, (b) total magnetic field profiles, (c) reduced to the equator, and (d) analytic signal. The extensions to the original 2004 survey show that additional magnetic targets are present to the south and to the west of the previous grid. Some of these magnetic targets were the focus of the later drill campaigns.
In 2007, Antares conducted a new IP (induced Polarization) geophysics program over both Haquira East and Haquira West. This program commenced in October 2007 and was completed in early December 2007. IP results were compared with drilling results at Haquira East in order to better define additional Haquira East targets for 2008 and to define a drilling program for Haquira West and additional satellite targets to begin in 2009.
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