New Developments

HIGH DEFINITION INDUCED POLARIZATION

INTRODUCTION

Based in Larder Lake Ontario Canada, Canadian Exploration Services Limited (CXS) is one of the largest exploration services companies based in the province of Ontario. After 6 years in business, CXS continues to be a well trusted leading provider of exploration services in Canada.

We pride ourselves on our ability to be a single solution provider of exploration services to our clients. We are able to offer most services required to conduct and manage exploration programs.

One of our fields of expertise is in the performance and interpretation of ground geophysics. We offer complete geophysical survey design, implementation, mapping and reporting based on our clients' individual project requirements.

In our quest to continually improve the services we provide to our customers, we have sought for a solution to their need for an accurate and cost-effective Deep IP survey. Our conversations with many exploration professionals over the years have led us to believe that there is a need for an alternative to the current methods being offered to them. Many speak of their frustration with current Deep IP survey providers and their lack of, or increasingly creative, explanations regarding the survey results, costs that greatly exceed original estimates and unsubstantiated claims that they can accurately define what's beneath at depths exceeding the height of the CN Tower (553m).

While conducting 1,000 + kilometers of conventional IP surveys over the years, it has been noted time and again by our clients that we can be looked upon to provide 'clean data' with 'sound and proven results'. We believe that there is no 'cutting corners' when it comes to collecting data that eventually will be used by our clients to make their exploration decisions. Realizing that the business of finding ore bodies can sometimes be a 'game of inches' we have always made it our mission to conduct all field work with integrity and provide our clients with realistic explanations of survey results.

We continue down that path with the development of our High Definition Deep IP Survey or HD – IP. The CXS HD-IP survey has been designed using proven equipment, techniques and science.

Please read on, the following pages derived from our case study will explain why we stand behind our HD-IP as an effective "Deep Earth Definition Tool".

CASE STUDY - ROW LAKE 9N

Ashley Gold Mines Limited has agreed to provide Canadian Exploration Services Limited (CXS) its previously collected data along line 9N from its Row Lake Property for comparison purposes. This data includes a pole dipole IP survey and almost 1000m of diamond drilling to compare against the CXS deep IP technology.

RL-07-01
This hole targeted a magnetic low with a coinciding Keating anomaly that was noted in a government airborne magnetic survey. This anomaly was followed up by a ground magnetic survey which isolated the low. The decision was then made to drill a shallow hole to determine the source of the anomaly. RL-07-01 was drilled grid west from station 600E. The source of the magnetic low was determined to be mineralized quartz feldspar porphyry.

RL-08-03
This hole was collared at the same location as RL-07-01; however striking grid east targeting a chargeability anomaly from the pole dipole IP survey. The hole was continued to 537m because of the increase in sulfide content noted in the drill core.


Figure 1
Figure 1. Click to enlarge.

POLE-DIPOLE SURVEY RESULTS

Figure 2 is presented for comparison purposes only and represents a standard N=6 survey provided by most geophysical companies. CXS typically conducts surveys using an N=10 standard resulting in better depth penetration and target definition. Figure 3 is our standard detail IP pseudosection from our N=10 survey. As shown, it provides an additional four depth layers and better definition of the target.

Figure 1
Figure 2. Click to enlarge.

Figure 1
Figure 3. Click to enlarge.

POLE-DIPOLE INVERSION RESULTS

Figure 4 is presented for comparison purposes and represents the chargeability inversion obtained from a pole dipole N=6 IP survey. The inversion routine has recognized and isolated the shallow sulfides noted in the first part of each hole along with the sulfides noted around the 100m mark of RL-07-01. With the way the survey is conducted edge effects may occur affecting at least the length of the receiver spread. In this case the first 150m and the last 150m may be distorted by this. This may compromise any inversion anomalies located near the first and last 150m of each line.

Figure 1
Figure 4. Click to enlarge.

Figure 5 is presented for comparison purposes and represents the resistivity inversion obtained from a pole dipole N=6 IP survey. The inversion routine have possibly recognized and isolated some of the resistivity features noted in the drill holes. Features such as the conductive fault and resistive porphyry are not highlighted in this inversion. These may be due to the lack of data available to the inversion to resolve these features. From these two inversions and datasets the shallow centrally located disseminated sulfides can be seen. From the resistivity pseudosection the more resistive porphyry can be recognized but the conductive fault is lost.

Figure 1
Figure 5. Click to enlarge.

Similar to figure 4, figure 6 exhibits three chargeability of consequence. The first appears near the top to the drill holes and represents the mineralized feldspar quartz porphyry. Even though generated with the same dataset this anomaly is weaker than the one noted with the N=6 configuration. The two others of note appear on the line extents at depth. These again may be real or may be an artifact of the inversion. The chargeability inversions between the N=6 and N=10 are quite similar with the difference being the extra 40m depth penetration.

Figure 1
Figure 6. Click to enlarge.

Unlike what is seen in figure 5, the resistivity signatures in figure 7 begin to correlate with the geology noted in the drilling. At this point the resistive low feature consistent with the faulting also begins to become apparent. This is due to the added data and depth measured with the N=10.

Figure 1
Figure 7. Click to enlarge.

DEEP IP SURVEY RESULTS

Figure 8 represents a raw data plot of the Deep IP Section collected during the CXS test on Row Lake 9N. Notice the correlation of sulfide content with the chargeability anomaly located at a depth of 300m.

Figure 1
Figure 8. Click to enlarge.

Figure 9 represents the inverted chargeability results from the Deep IP CXS collected on Row Lake 9N. The inversion highlighted two regions of high chargeability. The first of which is a narrow band near the collars of the drill holes and the second at 350m depth near 900N. Notice the correlation between these two anomalies and the sulfide content noted within the drill holes.

Figure 1
Figure 9. Click to enlarge.

Figure 10 represents the raw resistivity data collected by CXS on Row Lake 9N. Highlighted on this is a wide fault system seen 250m down diamond drill hole RL07-01 which is reflected as a resistivity low feature. Also highlighted on this figure are geological contacts noted from the diamond drilling.

Figure 1
Figure 10. Click to enlarge.

Prominent to the resistivity inversion of the CXS Deep IP data is the resistive high near 600E. This prominent feature appears to be dipping slightly to the west and correlates with the feldspar quartz porphyry which was intersected.

Figure 1
Figure 11. Click to enlarge.

SUMMARY

The results from Row Lake 9N are encouraging. One can see the CXS standard of N=10 providing more detailed information to a greater depth than the conventional N=6 configuration. This is exemplified with the inversion indicating the depth of investigation for N=6 being 67 meters verse the 108 meters indicated by the N=10 configuration.

From the CXS Deep IP tests one see an excellent correlation in the chargeability and resistivity within the raw data set. We have successfully overlain the percent sulfides noted in the drilling which correlated perfectly with the chargeability anomalies. The apparent resistivity data set correlates well with the geology noted in the drilling. Mathematically the depth of investigation from this survey was from 73 meters to 532 meters.

The inversions from Row Lake 9N of the CXS Deep IP tests also correlated well with the diamond drilling information. The chargeability inversion indicated a shallow chargeability anomaly in the 0 to 75 meter range that correlated with the sulfides noted in the beginning of the hole. This inversion also indicated a large chargeability anomaly deep near 900E which correlated exactly to the location of the anomaly in the drilling. The inversion of the CXS Deep IP dataset shows a depth penetration of between 0 and 439 meters.

Both a large resistivity low and resistivity high anomaly appeared in the raw data sets. Both of these features appeared within the drilling data, the low being an intense structural feature and the high being feldspar quartz porphyry. The inversion of the resistivity data did not produce the expected detail. It indicates the presence of both the fault and porphyry; however instead of refining the edges, the inversion appeared to broaden and lose resolution with depth.

The CXS Deep IP successfully defined the chargeability and major resistivity features found in the diamond drilling. The calculated depth penetration of the survey was 532m with the inversion providing a dataset to a depth of 439 meters compared to a pole-dipole survey providing a penetration of approximately 108 meters. The apparent resistivity was accurate but not as refined as expected. This most likely could be improved with a stronger transmitter, with the one being used for this test being only 3kW.

CONCLUSION

From the information provided, you can see how the CXS HD-IP is an effective "Deep Earth Definition Tool". At this moment, we are seeking new clients who are interested in having us perform HD-IP on their current projects. Even previously surveyed properties can be re-visited with our HD-IP to investigate what might have been overlooked by other methods. Please contact us today for a private consultation and cost estimate of having CXS HD-IP performed on your project.

From the CXS Deep IP tests one see an excellent correlation in the chargeability and resistivity within the raw data set. We have successfully overlain the percent sulfides noted in the drilling which correlated perfectly with the chargeability anomalies. The apparent resistivity data set correlates well with the geology noted in the drilling. Mathematically the depth of investigation from this survey was from 73 meters to 532 meters.

Please contact us today for a private consultation and cost estimate of having CXS HD-IP performed on your project.