SONORA: THE DON LUIS SILVER-GOLD-TUNGSTEN GREISEN-PORPHYRY PROJECT
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INTRODUCTION
Rome Resources Ltd. concentrates its exploration activities in Argentina and Mexico (Fig. 1). Emphasis is on acquisition and development of copper, tungsten, silver and gold properties. The main projects in Mexico are in Michoacan and in Sonora. Focus in Michoacan is on the Inguaran Valley Copper-Silver-Gold-Tungsten Porphyry Project, which is about 25 kilometers east of La Huacana and 50 kilometers east of the capital Morelia. Porphyry copper prospects in the San Isidro area of Michoacan are also held. Exploration in Sonora includes the: (i) La Colorada Bulk-Mineable Gold Project, about 40 kilometers east of the capital city Hermosillo, (ii) Los Muertos Bulk-Mineable Silver-Gold Project, about 80 kilometers southeast of Hermosillo, and (iii) Don Luis Silver-Gold-Tungsten Greisen-Porphyry Project, about 45 kilometers north-northeast of Hermosillo.
This article describes the Don Luis Silver-Gold-Tungsten Greisen-Porphyry Project, which is about 45 kilometers north-northeast of the large capital city of Hemosillo in the State of Sonora, Mexico.
General information on exploration of these projects is available in News Releases, etc., that are available on SEDAR (click “Investors”) and at www.RomeResource.com (click “News”). Specifically, the web site gives detailed geological descriptions and assays from the main properties (click “Projects” and select exploration of interest). Additional tables, maps, etc., detailing with property ownership, geology, geophysics, geochemistry and drilling also are available in Rome’s Annual Reports (click “Annual Reports”).
Figure 1. Rome’s exploration focus includes the: (i) Varvarco Gold-Vein and Gold-Porphyry Project in Neuquen, Argentina, (ii) Inguaran Valley Copper-Silver-Gold-Tungsten Porphyry Project in Michoacan, Mexico, (iii) La Colorada Bulk Gold Project in Sonora, Mexico, (iv) Los Muertos Bulk Silver-Gold Project in Sonora, Mexico, and (v) Don Luis Silver-Gold-Tungsten-Gold Greisen-Porphyry Project in Sonora, Mexico. More than 70,000 hectares are controlled by Rome of which only 300 hectares are held by option.
Don Luis Silver-Gold-Tungsten Greisen-Porphyry Property, described in Figures 1 to 27, is being explored as a bulk-tonnage, open-pit-mineable silver-gold-tungsten prospect. Locally, areas encountered in preliminary trenches and diamond drill holes are high grade, but overall, open-pit low-grade deposits are being targeted.
Positive, and often unique, features of the Don Luis Tungsten-Gold Greisen-Porphyry Property include: (i) a large area of abundant World War II dry-placers for tungsten that was strategic during that time, (ii) unique greisen hosted mineralization that covers a large area, (iii) association of greisen with quartz porphyry over an area about three kilometers east-west by one kilometer north-south [Fig. 5], (iv) encouraging tungsten and gold geochemistry in regional sampling, (v) significant gold and tungsten values in preliminary trenching [Fig. 8], (vi) gold and the tungsten minerals wolframite and scheelite in panned concentrates, (vii) locally, visible gold in quartz veins, (viii) abundant gold and tungsten in skarns common to this part of Sonora reflecting a significant gold-tungsten district, (ix) occurrence within the Early Tertiary: Cananea – La Caridad – Creston – Don Luis porphyry copper-molybdenum-tungsten-gold belt [Fig. 2], (x) currently high and rising prices for tungsten and gold, (xi) easy access, (xii) generally subdued topography suitable for open pit design, and (xiii) close proximity to several small villages and the major city and capital of Sonora at Hermosillo [Fig. 1].
ROME’S PROPERTY IN THE DON LUIS AREA TOTALS 30,347 HECTARES
Rome holds more than 30,0000 hectares in the Cananea – La Caridad – Creston – Don Luis porphyry copper-molybdenum-tungsten-gold belt (Fig. 2). Table 1 and Figures 1 to 4 outline details and location of the concessions held by Roma Recursos de Mexico, S.A. de C.V., a wholly owned subsidiary of Rome Resources Ltd., Figure 3 shows the core Don Luis claims (two optioned concessions totaling 450 ha) surrounded by the Grecia (3,100 ha) and Alberto (9,867 ha) applications. The Alberto concession extends north to metamorphic rocks related to the Cerro de Oro gold deposits. The Ontario application (16,930 ha) claims land south of properties held in the vicinity of El Creston molybdenum-copper deposit, which is currently under intensive exploration and development.
Figure 2. Significant location of the Don Luis Tungsten-Gold Greisen-Porphyry Property and ground held by Rome (Figs. 3 & 4) with respect to the Cananea – La Caridad – Creston – Don Luis porphyry copper-molybdenum-tungsten-gold belt. Specifically, the Don Luis tungsten-gold area is 47.5 kilometers south of Creston Moly’s El Creston molybdenum-copper deposit and 150 kilometers south of the famous Cananea copper mine. Cerro de Oro Gold deposits occur about halfway between Don Luis and Creston.
TABLE 1. Concessions totaling 30,347 hectares (Figs. 3 & 4) are held Roma Recursos de Mexico, S.A. de C.V., a wholly owned subsidiary of Rome Resources Ltd.
| NO. IN FIG. 3 | PROPERTY | STATUS | HECTARES |
| 1 [& Fig. 2] | DON LUIS | OPTIONED | 300 |
| 1 [& Fig. 2] | DON LUIS | OPTIONED | 150 |
| 1 [& Fig. 2] | GRECIA | ROMA APPLICATION | 3,100 |
| 3 | ALBERTO | ROMA APPLICATION | 9,867 |
| 4 | ONTARIO | ROMA APPLICATION | 16,930 |
| FIVE AREAS | 30,347 HA |
Figure 3. Property holdings on the Don Luis Tungsten-Gold Greisen-Porphyry Property in Sonora, Mexico. Rome holds Don Luis (300 ha) and Don Luis (150 ha) by option and Grecia (3,100 ha) by direct acquisition. The trenches in red locate the property as described in Figures 5 to 8.
Figure 4. Ground optioned or applied for by Roma Recursos de Mexico S.A. de C.V., a wholly owned subsidiary of Rome Resources Ltd., is shaded, outlined in purple and numbered 1 to 4, as defined in Table 1. The Don Luis Tungsten-Gold Greisen-Porphyry Property is centered near the “1” (Figs. 3 & 5). Black cross-hatched areas within purple claim areas are not held by Roma. Map sheets (1:50,000 scale) are outlined and named in red. UTM coordinates are Nad27 Mexico, Zone 12R.
GEOLOGY OF THE DON LUIS AREA
Figure 5. Geology of Don Luis Tungsten-Gold Greisen-Porphyry Deposit, Sonora, Mexico. Plus symbols mark the centers of induced polarization chargeability anomalies at different depths (brown = -25m, blue = -125m, green = -225 m, red = -325m and black = -425 m). Stars mark occurrences of “brain” rock (News Release of November 19th 2007) or pegmatite. Coordinates are UTM Nad27 Mexico, zone 12R.
Figure 5 illustrates the general geology of the Don Luis Area. The core of the property is greisenized Tertiary porphyry intruded into Cretaceous lapilli tuff volcanics. These units are unconformably overlain by late Tertiary ignimbites. Later Tertiary Baucarit Conglomerate occupies down dropped grabens. The greisen is marked locally by “brain rock” and pegmatite (Figs. 5 & 7). “Brain rock” texture is called “crenulate texture” at the Climax and Henderson Molybdenum Mines in Colorada, USA, and the Creston Molybdenum-Copper deposit in Sonora, Mexico. It is also commonly called “comb quartz” at a number of significant localities that include Log Tung in the Yukon, Canada, and Glacier Gulch in British Columbia, Canada. This texture is genetically significant with respect to porphyry molybdenum, and related, deposits.
Figure 6. Part of the north-south trench (NS in Fig. 5 & Fig. 8a) on the Don Luis Tungsten-Gold Greisen-Porphyry Deposit in Sonora, Mexico.
Figure 7. “Brain rock” texture in greisen in the Don Luis Tungsten-Gold Greisen-Porphyry Deposit in Sonora, Mexico. It is noted in a number of localities, marked “BRAIN” in Figure 5.
Figure 8. Reconnaissance and trench sampling (generally 2 meter intervals) on the Don Luis Tungsten-Gold Greisen-Porphyry Property in Sonora, Mexico. Note close association of tungsten (blue) and gold (yellow). Area of anomalous mineralization is about 400 meters north-south and 300 meters east-west. (Coordinates are UTM Nad27 Mexico, Zone 12R.)
The trenches, illustrated in Figures 6 and 8, had analyses of samples projected onto a straight line and subsequently composited. These composited values are presented in Tables 2 and 3. Details of “from-to” intervals in each “projected” trench are given. Aggregated results for both trenches taken together (Tables 2 & 3) show the significance of the grades of gold and tungsten in this prospect, which can be summarized as follows:
1. Tungsten: 491.6 meters averaging 158.9 parts per million (ppm or grams per tonne).
2. Gold: 314.3 meters averaging 0.163 parts per million (ppm or grams per tonne).
The variation in intervals between tungsten and gold, above, in Figure 8, and in Tables 2 and 3, reflects that gold and tungsten do not always occur together, and that the cutoffs, at this point, are chosen somewhat arbitrarily for the tungsten and gold described in Tables 2 and 3. Note that current values in United States dollars for tungsten and gold are about 25 dollars a kilogram for tungsten and 25 dollars a gram for gold.
TABLE 2. Tungsten values composited for trenches EW and NS (Figs. 5 & 8a) on the Don Luis Tungsten-Gold Greisen-Porphyry Property in Sonora, Mexico. Parameters used for tungsten were: minimum grade = 20 ppm, minimum length = 10 m, allowable internal dilution = 4 m at 10 ppm, and edge grade = 10 ppm.
| TRENCH | FROM | TO | TUNGSTEN PPM |
INTERVAL METERS | TUNGSTEN x INTERVAL |
| EW | 9.6 | 45.7 | 39.7 | 36.2 | 1437.4 |
| EW | 57.1 | 186.5 | 305.2 | 129.4 | 39506.4 |
| EW | 194.1 | 186.5 | 34.4 | 38.1 | 1309.6 |
| EW | 272.1 | 283.6 | 38.8 | 11.4 | 442.3 |
| EW | 378.8 | 401.6 | 181.6 | 22.8 | 4147.3 |
| AVERAGE EW | 237.9 METERS | 196.9 PPM | |||
| NS | 52.2 | 139.9 | 104.7 | 87.7 | 9181.1 |
| NS | 147.4 | 296.6 | 142.7 | 149.3 | 21302.5 |
| NS | 406.7 | 423.5 | 47.2 | 16.8 | 792.8 |
| AVERAGE NS | 253.7 METERS | 123.3 PPM | |||
| AVERAGE EW & NS TRENCHES | 491.6 METERS | 158.9 PPM |
TABLE 3. Gold values composited for trenches EW and NS (Figs. 5 & 8a) on the Don Luis Tungsten-Gold Greisen-Porphyry Property in Sonora, Mexico. Parameters used for gold were: minimum grade = 50 ppb, minimum length = 10 m, allowable internal dilution = 4 m at 25 ppb, and edge grade = 25 ppb.
| TRENCH | FROM | TO | GOLD PPB | INTERVAL METERS | GOLD x INTERVAL |
| EW | 32.4 | 55.2 | 272.9 | 22.8 | 6233.5 |
| EW | 66.6 | 178.9 | 128.1 | 112.3 | 14389.2 |
| AVERAGE EW | 135.2 METERS | 152.6 PPB | |||
| NS | 82.1 | 143.7 | 166.7 | 61.6 | 10265.6 |
| NS | 162.3 | 195.9 | 154.7 | 33.6 | 5195.5 |
| NS | 205.2 | 246.3 | 285.4 | 41.1 | 11722.6 |
| NS | 281.7 | 307.8 | 89.6 | 26.1 | 2341.4 |
| NS | 406.7 | 423.5 | 61.6 | 16.8 | 1033.6 |
| AVERAGE NS | 179.1 METERS | 170.6 PPB | |||
| AVERAGE EW & NS TRENCHES | 314.3 METERS | 162.8 PPB |
The significant intersections of tungsten (Table 2) in the east-west (EW) trench occur from 10 to 402 meters, or 392 meters. In the north-south (NS) trench significant intersections of tungsten (Table 2) occur from 52 to 424 meters, or 372 meters. Significant gold is nested within these tungsten intersections (Table 3). Consequently, the apparent north-south length is in the order of 400 meters; the east-west width is about 300 meters.
SOIL GEOCHEMICAL SURVEYS IN THE DON LUIS AREA
Soil geochemical results are presented in Figures 9 to 11. Figure 9 is a plan map of the Don Luis grid showing contours of soil “values” statistically derived from 12 metals associated with, and including, gold and tungsten. Colors are “rainbow” with violet as low and red as high. Bubble plots display soil results for gold (yellow triangles) and tungsten (green crosses). Figures 10 and 11 compare detailed variation of metal values in stacked bar graph profiles above induced polarization chargeability for the south to north line 534950 east (Fig. 10) and the west to east line 3261500 north (Fig. 11).
The soil geochemical anomalies described in Figure 9 (red bordered by yellow) to Figure 11 are central to the distribution of greisen and the location of the original trenches (Figs. 5, 6 & 8). The profiles in Figures 10 and 11 also show that high soil geochemical metal “values”, gold, tungsten, molybdenum and copper are all closely correlated with strong, near surface induced polarization chargeability. The 750 meter diameter of the main circular geochemical anomaly in Figure 9 agrees well with the area suggested by the trenching, and especially, the central induced polarization chargeability anomaly (see Fig. 20).
Figure 9. Soil geochemistry on the Don Luis grid. Contoured map (violet-low to red-high) is a statistically derived “value” for 12 metals associated with, and including, gold and tungsten. The bubble plots are for gold (ppb—yellow triangles) and tungsten (ppm—green crosses). The grey dashed line outlines the central greisen. Stacked bar graphs for soil geochemistry are plotted on sections 534850E and 3261500N above chargeability profiles in Figures 10 and 11, respectively.
Figure 10. South (left) to north (right) vertical section East 534850 of inverted chargeability (bottom) overlain on top by a geochemical soil profile presented as a stacked bar graph. “Value” is a statistical summation of 12 elements correlated with, and including, gold and tungsten. High soil geochemical tungsten, gold, molybdenum and copper correlate with near surface high chargeability. Geochemical profile scale is expanded compared to Figure 11.
Figure 11. West (left) to east (right) vertical section North 3261500 of inverted chargeability (bottom) overlain on top by a geochemical soil profile presented as a stacked bar graph. “Value” is a statistical summation of 12 elements correlated with, and including, gold and tungsten. High soil geochemical tungsten, gold, molybdenum and copper correlate with near surface high chargeability. Geochemical profile scale is compressed compared to Figure 10.
RESULTS FROM THE MAGNETOMETER GEOPHYSICAL SURVEYS IN THE DON LUIS AREA
The ground magnetometer survey was conducted on all six north-south lines and on the central east-west line, as shown in Figures 5 and 12. Results of the magnetometer survey are in Figure 12.
Figure 12. Magnetic low belt marks prospective areas of weakly magnetic granite-porphyry and greisen (cf. Fig. 5). Data has been reduced to the pole and upward continued for five meters. Color scheme for contours is rainbow (violet-low & red-high).
The magnetic survey in Figure 12 has been reduced to the pole and upward continued for five meters. This survey indicates that an east-west trending magnetic low belt marks prospective areas of weakly magnetic granite-porphyry and greisen (cf. Fig. 5).
RESULTS FROM THE INDUCED POLARIZATION GEOPHYSICAL SURVEYS
The induced polarization survey (Figs. 13) was conducted on all six north-south lines and on the one east-west line, as shown in Figure 5. Inverted data for chargeability and resistivity are used in Figures 14 to 19. Interpretation of the north-south Line 5359850 East, and the east-west Line 3261500 North is presented in Figures 14 to 17. A plan view of the chargeability and resistivity at a depth of 225 meters (-225) is shown in Figures 18 and 19. The inverted data shows a 600-800 meter wide zone of increased resistivity values accompanied by increased chargeability effects. Typically a narrower zone of higher magnitude chargeability occurs in the center of the most anomalous zone, and this is generally coincident with a narrower zone of lower resistivity values. The most concentrated source material seems to extend deeper on western lines, while very polarizable material appears to be concentrated near the surface on Line 535100 East. The high chargeability is clearly associated with sulfides, which although not apparent in the surface trenches are probably represented by the very red soil cut by the trenches. Speculatively, gold might be more closely associated with the resistivity anomaly; tungsten, on the other hand, might be related to the chargeability anomaly. There appears to be a down dropped block underlying the northern ends of the lines.
The chargeability induced polarization anomalies described in Figures 14 and 16 are summarized in Figure 20, which is a plan map showing the central greisen (with grey pattern and grey border) overlain by inverted induced polarization chargeability contours (value = 10) at elevations -125 meters (blue) and -325 meters (red) [cf. intermediate contours at -225 m (green) in Fig. 18; the centers of chargeability anomalies at different depths also are plotted on the geology map of Figure 5]. Note that the chargeability anomaly at value 10 is circular, 700 to 800 meters in diameter, and plunges steeply to the west to a depth greater than 400 meters (Figs. 14 to 17). The large size and intensity of this anomaly reflects large tonnage potential to significant sulfide mineralization.
Figure 13. Induced polarization geophysical survey on the Don Luis Tungsten-Gold Greisen-Porphyry Project in Sonora, Mexico. Note the gentle topography that characterizes the majority of the mineralized greisen.
Figure 14. South (left) to north (right) vertical section Line 534850 East of inverted chargeability. See plan level for -225 meters in Figure 18.
Figure 15. South (left) to north (right) vertical section Line 534850 East of inverted resistivity. See plan level for
-225 meters in Figure 19.
Figure16. West (left) to east (right) vertical section Line 3261500 North of inverted chargeability. See plan level for -225 meters in Figure 18.
Figure 17. West (left) to east (right) vertical section Line 3261500 North of inverted resistivity. See plan level for -225 meters in Figure 19.
Figure 18. Plan of -225 meter level for inverted chargeability. The locations of the 10-chargeability contour on the -125 and -325 meter levels (100 meters above and below this one) are in Figure 20.
Figure 19. Plan of -225 meter level for inverted resistivity. Resistivity highs tend to flank chargeability highs.
Figure 20. Plan showing central greisen (grey pattern & grey border) overlain by inverted induced polarization chargeability contours (value = 10) at elevations -125 meters (blue) and -325 meters (red), which can be compared to the intermediate contours at -225 meters (green) in Figure 18. Note that the chargeability anomaly at 10 is circular, 700 to 800 meters in diameter, and plunges steeply to the west for a depth greater than 400 meters (Figs. 14 to 17). The large size and intensity of this anomaly reflects large tonnage potential to significant sulfide mineralization.
PROPOSED DIAMOND DRILLING ON THE DON LUIS TUNGSTEN-GOLD GREISEN-PORPHYRY PROJECT
Summarized in Figure 21 and justified in Figures 21 to 27 are the holes proposed in Table 4, namely:
1. Seven first priority seven holes totaling 3,100 meters of HQ diamond drilling.
2. Eight second priority holes totaling 3,550 meters of HQ diamond drilling.
In Figure 5 the two trenches completed are marked in pale blue; chargeability anomalies (thick crosses) and resistivity anomalies (solid dots) indicate core anomalies at different depths (dark purple = -025 m, dark blue = -125 m, bright green = -225 m, red = -325 m, and black = -425 m). Many of the core anomalies are concentrated near the east-west section Line 3261500 North (Figs. 22, 23 and 26) and the north-south section Line 534850 East (Figs. 24, 25 and 27). Consequently, the proposed drill sites are displayed on the generalized geological map in Figure 21, and with detailed geophysics along the sections shown in Figures 22 to 27. Priority and infill holes would be along these two sections.
Figure 21. Plan of proposed diamond drilling (Table 1: red numbers = 1st priority & green letters = 2nd priority) on the Don Luis Tungsten-Gold Greisen-Porphyry Property. The purple shaded pattern is the surface outcrop of the main zone of greisen. The purple and yellow contours mark the chargeability of 10 at depths of 075 meters and 275 meters, respectively.
TABLE 4. Specifications and priorities for proposed drill holes (Figs. 21 to 27).
| IRST PRIORITY | 3,100 meters | |||
| EAST – WEST SECTIONLine 3261500 NorthHOLE NUMBER: COORD. EAST | LENGTHMETERS /INCLINATION | NORTH-SOUTH SECTIONLine 534850 EastHOLE NUMBER: COORD. NORTH | LENGTHMETERS /INCLIN | |
| 1: 534975E | 500 / 60 east | 4: 3261400N | 450 / 90 | |
| 2: 534725E | 500 / 60 east | 5: 3261900N | 400 / 90 | |
| 3: 534475E | 500 / 60 east | 6: 3261600N | 300 /90 | |
| 7: 3261200N | 450 / 90 | |||
| TOTAL EAST WEST SECTION3 HOLES | METERS1,500 | TOTAL NORTH-SOUTH SECTION4 HOLES | METERS1,600 | |
| SECOND PRIORITY | 3,550 meters | |||
| EAST – WEST SECTIONLine 3261500 NorthHOLE NUMBER: COORD. EAST | LENGTHMETERS /INCLINATION | NORTH-SOUTH SECTIONLine 534850 EastHOLE NUMBER: COORD. NORTH | LENGTHMETERS /INCLIN. | |
| A: 534850E | 500 / 60 east | B: (3261500N—see E-WSection) | (400 / 90) | |
| B: 534850E (see N-S Section) | 400 / 90 | F: 3261300N | 450 / 90 | |
| C: 534600E | 500 / 60 east | G: 3261800N | 400 / 90 | |
| D: 535100E | 300 / 60 east | H: 3261700N | 300 / 90 | |
| E: 534350E | 300 / 60 east | I: 3262000N | 400 / 90 | |
| TOTAL EAST. WEST SECTION5 HOLES | METERS2,000 | TOTAL NORTH-SOUTH SECTION5 HOLES | METERS1,550 |
The program of second priority holes is contingent on success in the first priority drill holes. Success along these sections in the first two stages of drilling would be followed up with continued grid-drilling on the north-south sections L534600E and L 535100, and on the dashed east-west sections L3261250N, L3261750N and L3262000N (Figs. 8 & 21). Given encouragement in these first two programs, an extensive grid-drilling program over the property will be required in order to determine potential reserves.
Figure 22. Proposed drill holes in east-west Line 3261500 North (Figs. 5 & 21) superimposed on inverted chargeability. First priority holes are red; infill second priority holes are green. Holes priorities and lengths are defined in Table 4 and shown in plan on Figure 21. All inclined holes dip 60 degrees east. Proposed drill sites on north-south section Line 534850 East are shown on Figures 24, 25 and 27.
Figure 23. Proposed drill holes on east-west Line 3261500 North (Figs. 5 & 21) superimposed on inverted resistivity. First priority holes are red; infill, second priority holes are green. Holes priorities and lengths are defined in Table 4 and shown in plan on Figure 21. All inclined holes dip 60 degrees east. Proposed drill sites on north-south section Line 534850 East are shown on Figures 24, 25 and 27.
Figure 24. Proposed drill holes on north-south Line 534850 East (Figs. 5 & 21) superimposed on inverted chargeability. First priority holes are red; infill, second priority holes are green. Holes priorities and lengths are defined in Table 4 and shown in plan on Figure 21. All holes are vertical. Proposed drill sites on east-west section Line 3261500 East are shown on Figures 22, 23 and 26.
Figure 25. Proposed drill holes on north-south Line 534850 East (Figs. 5 & 21) superimposed on inverted resistivity. First priority holes are red; infill, second priority holes are green. Holes priorities and lengths are defined in Table 4 and shown in plan on Figure 21. All holes are vertical. Proposed drill sites on east-west section Line 3261500 East are shown on Figures 22, 23 and 26.
Figure 26. Proposed drill holes on east-west Line 3261500 North (Figs. 5 & 21) superimposed inverted chargeability (solid contours & Fig. 22) and resistivity (dashed contours & Fig. 23). First priority holes are red; infill, second priority holes are green. Holes priorities and lengths are defined in Table 4 and shown in plan on Figure 21. All inclined holes dip 60 degrees east. Proposed drill sites on north-south section Line 534850 East are shown on Figures 24, 25 and 27.
Figure 27. Proposed drill holes on north-south Line 534850 East (Figs. 5 & 21) superimposed on inverted chargeability (solid contours & Fig. 24) and resistivity (dashed contours & Fig. 25). First priority holes are red; infill, second priority holes are green. Holes priorities and lengths are defined in Table 1 and shown in plan on Figure 3. All holes are vertical. Proposed drill sites on east-west section Line 3261500 East are shown on Figures 22, 23 and 26.
FUTURE DEVELOPMENT ON THE DON LUIS TUNGSTEN-GOLD GREISEN-PORPHYRY PROJECT
Rome’s Don Luis Tungsten-Gold Greisen-Property is unique and has provided significant results from early exploration using geochemical sampling, preliminary trenching and a detailed induced polarization survey. The property also has an excellent address with respect to mines in the Cananea – La Caridad – Creston – Don Luis porphyry copper-molybdenum-tungsten-gold belt (Fig. 2). Specifically, the Don Luis Tungsten-Gold Greisen-Porphyry Project is 47.5 kilometers south of Creston Moly’s Creston molybdenum-copper porphyry deposit and 150 kilometers south of the famous Cananea porphyry copper-molybdenum mine.
The grade from the trenches (Tables 2 & 3) and size estimates from the trenches (Fig. 8a) and from the geophysical anomalies (Fig. 21) are encouraging—especially given the current, early stage of exploration. The target of this exploration by diamond drilling is a large open pit mine for tungsten and gold. Because of the large size indicated by preliminary trenching, by geophysics and by soil geochemistry, discovery of other significant metals, such as copper and molybdenite, is likely. The terrain is amenable to open pit mining, the softness of the rock would facilitate mining and milling, and simple gravity separation might be used to concentrate the heavy minerals of tungsten and gold. Consequently, mining and recovery might be achieved at low cost.
Ongoing exploration on the Don Luis Bulk Tungsten-Gold Greisen-Porphyry Project requires extensive diamond drilling, as proposed above. Following this, given success in the initial drilling, a detailed drilling program will attempt to define reserves on the property. Management believes that the property has potential for a significant discovery. The regional area, a large part of which is held by Rome, will also receive careful evaluation for attempted discovery of other significant deposits.
QUALIFIED PERSON & CAUTIONARY NOTE
Colin I. Godwin, PhD, PEng, PGeo, is a Professor Emeritus of the Department of Earth and Ocean Sciences. He is President and Director of the Rome Resources Ltd., and is a qualified person as defined in National Instrument 43-101. He has verified the technical data disclosed in this description of the Don Luis Bulk Tungsten-Gold Greisen-Porphyry Project in Sonora, Mexico.
Rome Resources Ltd. is in the process of exploring its resource properties and has not yet determined whether the properties contain minerals or mineral reserves that are economically recoverable. The recouverability of the amounts shown for resource properties and any related deferred costs is dependent on the existence of economically recoverable mineral reserves, and the ability of Rome to obtain the necessary financing to complete the development and future profitable production from the properties or proceeds from the disposition thereof.
