Microsoft Word - Lakesuttorfinrep2003.docEPM 10735 – LAKE SUTTOR FINAL REPORT
Summary of work carried out from 22nd August 1995 to 6th June 2003
Authors
GLENGARRY RESOURCES LIMITED
TABLE OF CONTENTS
1.0 INTRODUCTION 1 2.0 LOCATION AND ACCESS 1 3.0 TENEMENT 1 4.0 REGIONAL GEOLOGY 2 5.0 PREVIOUS EXPLORATION 3 6.0 SUMMARY OF WORK COMPLETED DURING THE TENURE PERIOD. 3 7.0 REFERENCES 6
LIST OF TABLES
LIST OF FIGURES
2 Regional Geology and Structural Interpretation
EPM 10735 Lake Suttor - Final Report 22 August 1995 to 6th June 2003
1.0 INTRODUCTION
EPM 10735 covers part of the Devonian to Carboniferous Drummond basin and the Palaeozoic Anakie metamorphics. Epithermal gold mineralisation is hosted by volcanic and sedimentary units near the base of the Drummond Basin sequence.
The EPM was originally applied for to cover two main areas considered to be prospective for both porphyry and epithermal gold mineralisation - the Gunjulla Breccia prospect located approx. 25km SW of Mt Coolon and the Hill 253 area located approx. 10km NE of Twin Hills (refer Figures 1 & 2).
The EPM was explored by Glengarry Resources Ltd from 1995 to 2002 and was farmed out to Plutonic/Homestake from late 1998 to late 2000.
2.0 LOCATION AND ACCESS
The tenement is located in the Mt Coolon region of Central Queensland approximately 280km south of Townsville, 200km SE of Charters Towers and 140km northwest of Clermont (Figures 1 and 2).
Access within the EPM is along station tracks and fence lines but is difficult off these due to thick scrub.
3.0 TENEMENT
EPM 10735 is owned 100% by Glengarry Resources Limited. The tenement originally comprising 88 sub-blocks was granted for 2 years on 22nd August 1995 and subsequently reduced to 57 sub-blocks in 1997 (Table 1 & Figure 1). No work was carried out on the sub blocks relinquished.
Table 1 - Block Identification Map Series B - Clermont Block Sub-blocks
1406 ,x,y,z
1407 e,k,p,s,t,u,v,w,x,y,z
1408 a,b,f,g,l,m,q,v
1479 a,b,c,d,e,f,g,h,j,l,m
1480 a
1549 z
1550 q,v
1621 e,k
1
7600000 mN
1549
1478
1550
1479
1480
(
(
(
(
(
( (
(
(
(
(
( (
( ( ( (
(
8
---222000(°°
Drafted: Rob Lewis Date: 25/10/2001
Kilometers
G L E N G A R R Y
EPM 10735 LAKE SUTTOR
Location Plan
October 2001
FIGURE 1
( 550000 m E ) ( 5 5 2 2 5 5 0 0 0 0 0 0 mE ) ( 500000 mE ) ( $ )YANDAN
MT COOLON
REFERENCE
G L E N
Terra Search Pty Ltd
Author: Tony Alston Drafted: Rob Lewis
AEROMAGNETIC ANOMALIES
$ Au Deposit
and Structural Interpretation
FIGURE 2
EPM 10735 Lake Suttor - Final Report 22 August 1995 to 6th June 2003
4.0 REGIONAL GEOLOGY
EPM 10735 is located near the centre of the intracratonic Drummond basin of Upper Devonian to Lower carboniferous age, and lies on the west flank of the Palaeozoic Anakie Inlier. The regional geology of the Drummond Basin is described in BMR Bulletin No 132, Geology of the Drummond Basin Queensland by F Olgers, (1972) and has been supplemented by GSQ mapping of the Gunjulla 1:100,000 sheet.
The lowest recognised units of the Drummond basin within the EPM consist of a sequence of thinly bedded carbonaceous arenites and argillic sediments, with minor volcaniclastics and acid volcanic tuffs. Locally the sediments contain the coalified remnants of vascular plants. The unit is correlated with the St Anns formation.
Overlying units of the St Anns formation are a sequence of volcanic rocks, correlated with the Silver Hills Volcanics which consist of ash to lapilli size ignimbritic and airfall acid tuffs with minor sandstone and siltstone, a clast rich lithic ignimbrite and andesitic flows and pyroclastics which have been intruded by flow banded rhyodacite and associated late stage rhyodacitic pyroclastics.
The Silver Hills Volcanics are overlain by sandstones and conglomerates of the Raymond and Mt Hall formations.
A number of granitic intrusives are present and are assumed to be of similar age to the mid Devonian Retreat granite.
Tertiary fluviatile sediments (Suttor formation) and Quaternary alluvium and soils provide extensive cover over the older rock units. Widespread deep lateritic weathering of Tertiary and older rocks extends to depths of up to 100m below the surface.
2
EPM 10735 Lake Suttor - Final Report 22 August 1995 to 6th June 2003
5.0 PREVIOUS EXPLORATION
Prior to granting of EPM 10735, the only drilling carried out within the current tenure was by CRA and Rhodes Resources (Sabminco). A comprehensive review of all previous work and targets generated is presented in Glengarry’s 1996 annual report.
6.0 SUMMARY OF WORK COMPLETED DURING THE TENURE PERIOD
1995-1996
Work carried out during the first year involved data collation, lag sampling and shallow RAB drilling on the Gunjulla Breccia prospect (25 km SW of Mt Coolon) and data collation and regional lag, rock chip and soil sampling in the Hill 253 area (10 km NE of Twin Hills).
Gunjulla Breccia Prospect
Lag sampling on the CRA grid around the Gunjulla Breccia returned anomalous results (ppm) in Au (max 1.75), Pb (max 240), Cu (max 192), As (max 273) and Sb (max 255). Some anomalous Au and Cu values were also returned from drilling (32 RAB/OHP holes for 583m) and the best intersections are tabled below ie:
95GBR24 18m @ 380 Cu from 6m (EOH 24m)
95GBR30 6m @ 300 Cu from 15m (EOH 21m)
95GBP32 12m @ 0.10 Au from 6m (EOH 39m)
Most drill holes intersected weakly to moderately altered (tourmaline, silica, sericite) granodiorite whilst some holes failed to hit bedrock.
Hill 253 Area
A total of 214 samples were collected comprising 67 rock chip, 78 soils (termitaria) and 69 lag samples. These showed some interesting As, Sb & Mo anomalies associated with widespread chalcedonic quartz scree at the AVR prospect whilst strong Au/As lag/soil anomalies were associated with a well defined NNW structure at the BCL Prospect.
1996-1997
1997-1998
A 1345 line km aeromagnetic/radiometric survey was flown by UTS Geophysics on E-W lines at 100m line spacing and a 40-50m flying height.
Gridding, soil sampling and rock chip sampling was carried out on the AVR and Hill 253 prospects, however the soil program was not completed at Hill 253 due to heavy rains.
3
EPM 10735 Lake Suttor - Final Report 22 August 1995 to 6th June 2003
80 soil samples were collected on the AVR grid - the maximum Au assay from the soil sampling was 6 ppb however there is a distinct As anomaly of + 20 ppm over an area of about 800 by 600 metres just north of the anomalous sinter locality.
150 soil samples were collected on the Hill 253 grid - the maximum Au assay was 10 ppb with a number of samples from 5-9 ppb Au. Sampling of this grid is incomplete. Previous reconnaissance sampling from the northern part of the grid area had returned up to 80 ppb Au.
6 rock chip samples were collected at the Gunjulla Breccia prospect and returned maximum values (ppm) of 2.06 Au, 463 As and 88 Sb from tourmaline-quartz breccia sub outcrop.
4 rock samples of possible sinter and altered tuffs (quartz, carbonate, limonite) were collected from sub outcrop at the AVR anomaly. These returned assays (ppm) up to 8 Ag, 676 As and 24 Sb. This area is considered to be significant as there is interpreted Silver Hills Volcanics outcropping as well as abundant bluish chalcedony float (sinter?) and lag material anomalous in As, Sb and Mo.
1998-1999 (Plutonic JV)
Work carried out by Plutonic during this period identified 4 target areas which required drill testing. These targets were:
Au (BCL) and Mo (LAG) anomalies centred on 7583200N/512001E, located NNW of the AVR East prospect.
Au (BCL) and Au, Pb, Cu and Mn (LAG) centred on 7585100N/511500E, located east of Hill 253.
Cu, Ag (BCL) and As, Sb (LAG) centred on 7580400N/510000E at the AVR prospect
Magnetic (intrusive?) anomaly centred on 7581200N/510000E near a major hinge zone.
1999-2000 (Homestake JV)
Homestake drilled 2,959m of RAB in 51 holes to test regional geochemical, magnetic, structural or geological features on the southern portion of the EPM. No bedrock anomalies were located.
2000-2001
During the twelve month period to August 2001, a total of 4,039m of RAB, Aircore, and RC drilling was completed in 74 holes, predominantly on the northern portion of EPM 10735. These holes tested selected regional geochemical, magnetic, structural, or geological features.
4
EPM 10735 Lake Suttor - Final Report 22 August 1995 to 6th June 2003
A significant gold anomaly of 164 ppb was identified by RAB drilling south west of the Hill 253 magnetic anomaly. As this intersection was from the major regional redox interface and near a major ENE fault, a follow up aircore drilling program was undertaken which identified a number of mafic intrusives, including a tonalite with copper-molybdenum mineralisation indicative of porphyry copper styles. Prospecting in this area referred to as the Dacite Hill prospect located outcropping flowbanded dacite and a vesicular rhyolite, both thought to be Carboniferous Silver Hills Volcanics, previously unknown in this part of the Drummond Basin. Significant gold mineralisation was also identified in brecciated quartz veins approx. 1km to the south (Ritz prospect) with a best assay of 7.09 g/t gold. The character of the mineralisation here suggested a high level porphyry or epithermal origin, in keeping with newly identified intrusives. This area is located on the southern margin of a large circular structure interpreted to be a caldera or impact crater. Follow up LAG and soil sampling identified this area as highly anomalous in arsenic and antimony
RAB drilling at the large Diamond Creek magnetic anomaly on the east side of the property was unsuccessful with the drill rig unable to penetrate the gilgai clay and interbedded aeolian running sands. A red sandy ridge previously thought to be derived from granodiorite was shown to be a 5m thick aeolian dune. One hole intersected granodiorite with moderately anomalous gold (49ppb) in the upper saprolite. A follow up aircore drilling program was however successful in penetrating the cover with average hole depths of 80m. Unusual rocks intersected include a pyroxene porphyritic lamprophyre thought to have kimberlitic affinities. No anomalous metal assays were intersected in this area.
2001-2002
A total of 3560m of aircore and RC drilling was completed in 59 holes on the northern portion of the EPM. These holes tested selected regional geochemical, magnetic, structural and geological features in the Ritz and Dacite Hill prospect areas.
Drilling to test a NNW structural zone on the western margin of the Dacite Hill tonalite resulted in a best intersection of 1m at 0.46g/t gold in chloritic metasiltstones. No volcanics were intersected. At the Ritz prospect, zones of quartz breccia veining were intersected with best results of 2m at 1.68 g/t gold although there was an apparent poor correlation between quartz vein occurrence and gold mineralisation.
5
EPM 10735 Lake Suttor - Final Report 22 August 1995 to 6th June 2003
7.0 REFERENCES
ALSTON, T., 1996. - Lake Suttor Annual Report EPM 10735 23rd August 1995
–22nd August 1996. Glengarry Resources NL
ALSTON, T., 1997. - Lake Suttor Annual Report EPM 10735 23rd August 1996
–22nd August 1997. Glengarry Resources NL
ALSTON, T., 1998. - Lake Suttor Annual Report EPM 10735 23rd August 1997
–22nd August 1998. Glengarry Resources NL
ALSTON, T.,1999. - Annual Report for the 12 Months Ending 21/8/99, EPM 10735 Lake Suttor, Plutonic Operations Limited. Technical Report No. 702.
REA, P. AND PAGADUAN, A., 2000. - Annual Report for the 12 Months Ending 21/8/2000, EPM 10735 Lake Suttor, Homestake Gold of Australia. Technical Report No. 754.
ALSTON, T. AND REA, P., 2001. - Annual Report for period ending 21st August 2001 EPM 10735 Lake Suttor. Glengarry Resources Ltd.
ALSTON T. AND REA, P., 2002. - Annual Report for period ending 21st August 2002 EPM 10735 Lake Suttor. Glengarry Resources Ltd.
6