Following therecent announcement about the re-rating of the Macauley Creek project I thoughtI might have a look at the exploration that has been carried out in the regionby previous companies.
Theannouncement of 26 August 21 stated that ICG planned to carry out an AMAGRADsurvey over tenement EPM27163 in coming weeks. What I have been able toascertain is that an Airborne Magnetic and Radiometric Survey has already beenflown over parts of this region back in July 2007 as part of a 1,600 squarekilometre survey on behalf of Nextstar. The results were then interpreted bySouthern Geoscience Consultants who identified 6 different exploration targettypes in a plan. The partial plan extract below covers the majority of EPM 27163.
To make sense of the plan I had reproduced the following target types from their report along with the plan legend that explains the geology.
1. Zones of subdued magnetic response (A-01 – A-04): These zones can indicate magnetite destruction associated with alteration and potential mineralisation, non- to weakly magnetic intrusions, or shallow basement rocks.
2. Structurally interesting zones (B-01 – B-17): These are zones of structural interest and/or complexity that may represent dilational sites or sites where mineralising fluids may have potentially been focussed. These include axial faults, flexures along major structures and intersections of multiple structures.
3. Discrete zones of anomalous/elevated potassium (C-01 – C-13): High potassium and K/Th ratios can indicate secondary potassium enrichment via hydrothermal fluids and are a common vector to high rank alteration zones and potential mineralisation, gold in particular.
4. Discrete zones of anomalous uranium (D-01): Zones of anomalous uranium where potassium and thorium are not elevated may be the direct surface response of uranium mineralisation.
5. Discrete magnetic anomalies (E-01 - E-09): These anomalies may represent a buried intrusive and hence a potential source of heat and metals, or possibly deposition of magnetic minerals such as magnetite and/or pyrrhotite during hydrothermal alteration.
6. Magnetic anomalies in known mineralised area (F-01 - F-25): These anomalies represent moderate to very strong magnetic highs, some discrete, in areas of known magnetite alteration (skarns) associated with base-metal mineralisation. They may represent magnetite alteration or possibly strongly magnetic amphibolites which also occur in the area.A commentary was also provided on eachof the targets which I have reproduced. The numbers after each of the targetidentification numbers are the easting and northing co-ordinates which is thecentral point of the anomaly area.
A-01 383759 7881770 Magnetically quietzone. Possible alteration.
A-02 378404 7882832 Magnetically quietzone. Possible alteration.
A-03 380381 7884027 Magnetically quietzone. Possible alteration.
A-04 385232 7883218 Magnetically quietzone. Possible alteration.
B-01 354298 7931724 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-02 370833 7896332 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-03 374101 7896173 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-04 376257 7896570 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-05 367447 7895260 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-06 377045 7893802 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-07 378425 7894690 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-08 374936 7882352 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-09 371569 7886886 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-10 373129 7889302 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-11 374443 7890548 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-12 377794 7891743 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-13 380259 7888790 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-14 371725 7891646 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-15 368859 7882117 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-16 358227 7929171 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
B-17 356056 7928725 Structurallyinteresting zone. Potential dilational site and/or high fluid flux.
C-01 374496 7888234 Zone of high K/Thratio. Possible secondary alteration?
C-02 377949 7890540 Zone of high K/Thratio. Possible secondary alteration?
C-03 380313 7887771 Zone of high K/Thratio. Possible secondary alteration?
C-04 378377 7885728 Zone of high K/Thratio. Possible secondary alteration?
C-05 385572 7886201 Zone of high K/Thratio. Possible secondary alteration?
C-06 346003 7893555 High K/Th ratiogranite. Coincident elevated U. Likely to be primary felsic response, notpotassic alteration.
C-07 379590 7898507 Zone of high K/Thratio. Possible secondary alteration?
C-08 360395 7902202 High K/Th ratiogranite. Coincident elevated U. Likely to be primary felsic response, notpotassic alteration.
C-09 347960 7891521 High K/Th ratiogranite. Coincident elevated U. Likely to be primary felsic response, notpotassic alteration.
C-10 356236 7899462 High K/Th ratiogranite. Coincident elevated U. Likely to be primary felsic response, notpotassic alteration.
C-11 375965 7882537 Zone of high K/Thratio. Possible secondary alteration?
C-12 371486 7883165 Zone of high K/Thratio. Possible secondary alteration?
C-13 342321 7895876 High K/Th ratiogranite. Coincident elevated U. Likely to be primary felsic response, notpotassic alteration.
D-01 373696 7891177 Zone of elevateduranium.
E-01 328601 7916384 Discrete magnetichigh. Possible intrusive or magnetite accumulation.
E-02 331124 7915365 Discrete magnetichigh. Reversely magnetised. Possible intrusive (basalt?) or magnetiteaccumulation.
E-03 354709 7907807 Discrete magnetichigh. Reversely magnetised. Possible intrusive or magnetite accumulation.
E-04 364423 7887528 Discrete magnetichigh. Reversely magnetised. Possible intrusive or magnetite accumulation.
E-05 363641 7889850 Discrete magnetichigh. Reversely magnetised. Possible intrusive or magnetite accumulation.
E-06 362779 7891558 Discrete magnetichigh. Reversely magnetised. Possible intrusive or magnetite accumulation.
E-07 369171 7889594 Discrete magnetichigh. Reversely magnetised. Possible intrusive or magnetite accumulation.
E-08 360920 7902756 Moderate, discretemagnetic high. Possible intrusive or magnetite accumulation.
E-09 347037 7924607 Discrete magnetichigh. Reversely magnetised. Possible intrusive or magnetite accumulation.
F-01 358985 7901796 Discrete magnetichigh. Possible magnetite alteration or intrusive.
F-02 369383 7883147 Discrete magnetichigh. Possible magnetite alteration.
F-03 372038 7882333 Discrete magnetichigh. Possible magnetite alteration and/or amphibolite.
F-04 374396 7885009 Discrete magnetichigh associated with known mineralisation. Possible magnetite alteration.
F-05 373401 7886620 Discrete magnetichigh. Possible magnetite alteration.
F-06 381184 7895705 Discrete magnetichigh. Possible magnetite alteration.
F-07 375379 7881459 Moderate, discretemagnetic high. Possible magnetite alteration.
F-08 370567 7884875 Moderate, discretemagnetic high. Possible magnetite alteration.
F-09 372120 7886726 Moderate, discretemagnetic high. Possible magnetite alteration.
F-10 373649 7884889 Moderate, discretemagnetic high associated with known mineralisation. Possible magnetitealteration.
F-11 382607 7884765 Moderate, discretemagnetic high. Possible magnetite alteration and/or amphibolite.
F-12 382951 7884149 Moderate, discretemagnetic high. Possible magnetite alteration and/or amphibolite.
F-13 382062 7890257 Moderate, discretemagnetic high. Possible magnetite alteration and/or amphibolite.
F-14 371290 7883663 Moderate, discretemagnetic high. Possible magnetite alteration.
F-15 370615 7883367 Moderate, discretemagnetic high. Possible magnetite alteration.
F-16 360422 7899590 Discrete magnetichigh. Possible magnetite alteration or intrusive.
F-17 377359 7888534 Extensive magnetichigh. Magnetite alteration (skarn) associated with known mineralisation.
F-18 380973 7888879 Discrete magnetichigh. Possible magnetite alteration and/or amphibolite.
F-19 384109 7885278 Discrete magnetichigh coincident with known mineralisation. Possible magnetite alteration and/oramphibolite.
F-20 376679 7889637 Moderate, discretemagnetic high associated with known mineralisation. Possible magnetitealteration.
F-21 375731 7888195 Moderate, discretemagnetic high. Possible magnetite alteration.
F-22 373191 7888882 Moderate, discretemagnetic high associated with known mineralisation. Possible magnetitealteration.
F-23 380785 7882482 Moderate, discretemagnetic high. Possible magnetite alteration and/or amphibolite.
F-24 373905 7883300 Moderate, discretemagnetic high. Possible magnetite alteration.
F-25 381696 7898442 Moderate magnetichigh associated with known mineralisation. Possible magnetite alteration.
The review of the airborne survey resultedin 5 recommended priority targets. The magnetic plan shows the location of 4 ofthose priority targets.
The targets that pertain to part of Inca’s tenement aretarget areas 2 & 3rend so what is the possibility that they connect at depth?
The consultants made the following comments in relation to those 2 targets.
Target 2 occurs south of the Mt Moss East anomaly and coincides with the sediment (Ewan beds) / Oweena granite contact. Target 2 is also a discreet, positive magnetic anomaly which is located on a north-east structure, parallel to the Mt Moss East trend.
Target 3 is interpreted to be along strike, (north-east) of Target 2 and consists of several small discreet magnetic highs in the vicinity of the sediment (Ewan beds) / Oweena granite contact.
If you refer back to Inca’s 26 August announcement you will be able to match target 3 with the Wallaroo anomaly and then match each of the other named anomalies with a magnetic high plus some other, as yet, unnamed magnetic high targets.
