ASX Release: Marengo Re-Releases Results for Recent Sampling and Exploration Drilling at Rima Prospect
TORONTO, ONTARIO--(Marketwired - March 12, 2015) -
NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES.
Marengo Mining Limited (MRN.TO)(MMC.AX)(MMC) ("Marengo") is pleased to announce the results of a recent sampling and drilling program at its Rima Prospect ("Rima"), as it continues to advance its Yandera copper project ("Project") in Papua New Guinea.
Rima is located approximately 700 metres to the northwest of the western edge of the Imbruminda resource area that forms part of the Yandera copper project (Figure 1). Rima was discovered in 2014 while geologists - following up on work completed in 2008 and 2009 - were mapping and sampling in creeks west of the Imbrum river. Surface sampling of some creeks in the Rima area revealed elevated copper content in grab and channel samples (Figure 2 and Table 1).
In late 2014, Marengo completed four drill holes (totalling 1004.6 metres) at Rima in search of higher grade copper mineralization to complement the current Yandera resource. The results (Tables 2-5) confirm the presence of higher grade mineralization, and one of the next phases of work is to constrain its limits.
Higher grade mineralization at Rima appears to be hosted in a phyllically altered structural domain within a broader zone of potassically altered porphyritic quartz diorite and granodiorite. Sheeted veins within these structural zones of phyllic alteration have a north-northwesterly strike and dip steeply to the west-southwest. Domains of these sheeted veins appear to occur in a northwesterly trending corridor (Figure 3).
"The results at Rima are encouraging and suggest the presence of additional domains of near-surface higher grade copper mineralization that collectively, may enhance the current Yandera resource," said Chief Executive Officer Pieter Britz.
"Given these encouraging results, we are not proceeding with the remainder of the previously announced 10-hole drill program. Rather, we are working towards completion of a more extensive field program during 2015, leading to a more comprehensive drill program in 2016. We remain enthusiastic about the potential of Rima and other similar prospects."
Table 1. Results from Surface Samples at Rima. Coordinates are UTM in AGD 1966, Zone 55. 'Rock' sample types were collected from a point at the respective Northing and Easting, and therefore do not have a width across which they were sampled. | |||||||
Sample | Type | Width (m) | Northing | Easting | Gold ("Au") ppm(1) | Copper ("Cu") ppm | Molybdenum ("Mo") ppm |
YE03907 | Channel Chip | 3.00 | 9367265 | 291250 | 0.048 | 2270 | 21 |
YE03908 | Channel Chip | 3.00 | 9367266 | 291247 | 0.045 | 1280 | 10 |
YE03909 | Channel Chip | 3.00 | 9367271 | 291246 | 0.032 | 1490 | 20 |
YE03910 | Channel Chip | 3.00 | 9367273 | 291244 | 0.022 | 734 | 11 |
YE03911 | Channel Chip | 3.00 | 9367275 | 291242 | 0.045 | 1800 | 21 |
YE03912 | Channel Chip | 3.00 | 9367277 | 291235 | 0.039 | 1940 | 21 |
YE03913 | Channel Chip | 3.00 | 9367281 | 291234 | 0.037 | 1430 | 32 |
YE03914 | Channel Chip | 3.00 | 9367283 | 291231 | 0.047 | 2590 | 42 |
YE03915 | Channel Chip | 3.00 | 9367286 | 291234 | 0.027 | 1650 | 23 |
YE03916 | Channel Chip | 3.00 | 9367289 | 291234 | 0.019 | 1410 | 11 |
YE03917 | Channel Chip | 3.00 | 9366272 | 291059 | 0.042 | 2580 | 112 |
YE03918 | Channel Chip | 3.00 | 9366241 | 291018 | 0.1 | 1450 | 5 |
YE03919 | Channel Chip | 1.50 | 9366237 | 290962 | 0.193 | 4620 | 12 |
YE03941 | Channel Chip | 10 | 9367331 | 291221 | 0.029 | 1166 | 23 |
YE03942 | Channel Chip | 10 | 9367340 | 291219 | 0.029 | 889 | 13 |
YE03943 | Channel Chip | 10 | 9367350 | 291221 | 0.015 | 591 | 7 |
YE03944 | Channel Chip | 10 | 9367359 | 291216 | 0.013 | 456 | 7 |
YE03945 | Channel Chip | 10 | 9367366 | 291208 | 0.028 | 1229 | 8 |
YE03947 | Channel Chip | 10 | 9367372 | 291200 | 0.019 | 815 | 7 |
YE03950 | Channel Chip | 10 | 9367377 | 291191 | 0.013 | 1616 | 26 |
YE03937 | Rock | - | 9366727 | 290562 | 0.01 | 1146 | 4 |
YE03938 | Rock | - | 9366726 | 290580 | 0.071 | 2459 | 10 |
YE03939 | Rock | - | 9366379 | 290837 | 0.037 | 1988 | 16 |
YE03940 | Rock | - | 9366354 | 290863 | 0.198 | 6200 | 41 |
YE03948 | Rock | - | 9366310 | 290880 | 0.107 | 3330 | 24 |
YE03949 | Rock | - | 9366320 | 290870 | 0.052 | 2238 | 32 |
YE03951 | Rock | - | 9367385 | 291151 | 0.037 | 623 | |
YE3921 | Rock | - | 9366258 | 290951 | 2.45 | 61600 | 174 |
YE3922 | Rock | - | 9366268 | 290969 | 0.174 | 1911 | 3 |
YE3923 | Rock | - | 9366284 | 291016 | 0.286 | 5483 | 55 |
YE3924 | Rock | - | 9366295 | 291036 | 0.024 | 487 | 9 |
YE3925 | Rock | - | 9366348 | 291150 | 0.097 | 10500 | 26 |
YE3926 | Rock | - | 9366310 | 291091 | 0.015 | 309 | 3 |
YE3927 | Rock | - | 9367007 | 290962 | 0.053 | 2235 | 43 |
YE3928 | Rock | - | 9367020 | 290868 | 0.014 | 342 | 9 |
YE3929 | Rock | - | 9367041 | 291116 | 0.022 | 591 | 19 |
YE3931 | Rock | - | 9367144 | 290809 | 0.079 | 2926 | 10 |
YE3932 | Rock | - | 9367101 | 291013 | 0.044 | 1590 | 334 |
YE3933 | Rock | - | 9367294 | 291230 | 0.063 | 1561 | 89 |
YE3934 | Rock | - | 9367340 | 291225 | 0.11 | 8337 | 106 |
YE3935 | Rock | - | 9367284 | 291271 | 0.044 | 3700 | 80 |
YE3936 | Rock | - | 9367132 | 290884 | 0.047 | 3153 | 430 |
(1) "ppm" means parts per million. |
Drilling Results:
Table 2. Significant Drill Results for YD560 (AZIM 134°, INCL -60°, TD 200.7 m) | ||||||
From (m) | To (m) | DH Thickness (m) | Cu % | Au g/t(1) | Mo % | CuEQ %* |
4 | 24 | 20 | 0.1050 | 0.053 | 0.0016 | 0.110 |
120 | 144 | 24 | 0.1879 | 0.088 | 0.0127 | 0.225 |
Including | ||||||
134 | 144 | 10 | 0.3547 | 0.183 | 0.0297 | 0.440 |
With | ||||||
142 | 144 | 2 | 0.9810 | 0.664 | 0.1350 | 1.370 |
(1) "g/t" means grams per tonne. |
Table 3. Significant Drill Results for YD561 (AZIM 065°, INCL -65°, TD 263.4 m) | ||||||
From (m) | To (m) | DH Thickness (m) | Cu % | Au g/t | Mo % | CuEQ %* |
0 | 263.4 | 263.4 | 0.2373 | 0.109 | 0.0021 | 0.243 |
Including | ||||||
8 | 22 | 14 | 0.2549 | 0.124 | 0.0034 | 0.265 |
Also including | ||||||
38 | 132 | 94 | 0.5011 | 0.234 | 0.0043 | 0.514 |
With | ||||||
94 | 120 | 26 | 1.0054 | 0.455 | 0.0110 | 1.037 |
Table 4. Significant Drill Results for YD562 (AZIM 245°, INCL -65°, TD 300.6 m) | ||||||
From (m) | To (m) | DH Thickness (m) | Cu % | Au g/t | Mo % | CuEQ %* |
0 | 300.6 | 300.6 | 0.1084 | 0.051 | 0.0004 | 0.113 |
Including | ||||||
70 | 80 | 10 | 0.2696 | 0.092 | 0.0007 | 0.272 |
Also including | ||||||
146 | 238 | 92 | 0.1552 | 0.062 | 0.0003 | 0.156 |
With | ||||||
190 | 218 | 28 | 0.2019 | 0.084 | 0.0002 | 0.202 |
Also including | ||||||
264 | 280 | 16 | 0.1402 | 0.089 | 0.0004 | 0.141 |
Table 5. Significant Drill Results for YD563 (AZIM 58°, INCL -65°, TD 239.9 m)
From (m) | To (m) | DH Thickness (m) | Cu % | Au g/t | Mo % | CuEQ %* |
0 | 239.9 | 239.9 | 0.1181 | 0.067 | 0.0004 | 0.119 |
Including | ||||||
74 | 92 | 18 | 0.2114 | 0.087 | 0.0003 | 0.212 |
Also including | ||||||
106 | 126 | 20 | 0.1715 | 0.090 | 0.0003 | 0.172 |
Also including | ||||||
150 | 164 | 14 | 0.3167 | 0.207 | 0.0003 | 0.318 |
With | ||||||
162 | 164 | 2 | 0.8900 | 0.509 | 0.0003 | 0.891 |
*CuEQ% means copper equivalent percentage and is calculated using spot prices of $2.60/lb Cu, and $7.50/lb Mo which results in in equation CuEQ% = Cu% + Mo%*2.885. In calculating the CuEQ%, Marengo assumes that it will be able to recover copper and molybdenum from mineral resources that may be identified in the Rima area. Testing on samples from the nearby Yandera resources suggest recoveries of these metals may be on the order of 91% for copper and 80% for molybdenum. Marengo makes no assumptions about future metal prices.
Full drill results are available on our website.
To view Figure 1. Map of Yandera Project Area with Rima Prospect Area, please visit the following link: http://media3.marketwire.com/docs/MRN1.jpg.
To view Figure 2. Map of Recent Sampling at Rima, please visit the following link: http://media3.marketwire.com/docs/MRN2.jpg.
To view Figure 3. Vertical cross section through holes YD560, YD 561, YD 562, and YD 563. Copper results shown on the side of the drill trace. Legend: HGR: granodiorite; POD: porphyritic quartz diorite; BXi: breccia; PAN: porphyritic andesite, please visit the following link: http://media3.marketwire.com/docs/MRN3.jpg.
This news release does not constitute an offer to sell or the solicitation of an offer to buy any ordinary shares within the United States. The ordinary shares have not been offered and will not be registered under the United States Securities Act of 1933, as amended (the "1933 Act"), or any state securities laws. Accordingly, the ordinary shares may not be offered or sold in the United States or to U.S. persons (as such terms are defined in Regulation S under the 1933 Act) unless registered under the 1933 Act and applicable state securities laws or an exemption from such registration are granted.
Cautionary Statement Regarding Forward-Looking Information
This news release contains forward looking information. Such forward-looking information is often, but not always, identified by the use of words such as "seek", "anticipate", "believe", "plan", "estimate", "expect" and "intend" and statements that an event or result "may", "will", "should", "could", or "might" occur or to be achieved and any other similar expressions. In providing the forward-looking information in this news release, the Company has made numerous assumptions regarding: (i) the accuracy of exploration results received to date; (ii) anticipated costs and expenses; (iii) that the results of the feasibility study continue to be positive; and (iv) that future exploration results are as anticipated. Management believes that these assumptions are reasonable. Forward-looking information is subject to known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those contained in the forward-looking information, including a actual results of exploration. Some of these risks, uncertainties and other factors are described under the heading "Risks Factors" in the Company's annual information form available on the SEDAR website. Forward-looking information is based on estimates and opinions of management at the date the statements are made. Except as required by law, Marengo does not undertake any obligation to update forward-looking information even if circumstances or management's estimates or opinions should change. Readers should not place undue reliance on forward-looking information.
Factors that could cause actual results to vary materially from results anticipated by such forward-looking statements include the actual results of exploration activities, changes in market conditions, risks relating to international operations, fluctuating metal prices and currency exchange rates, and other risks of the mining industry. Although Marengo has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Marengo undertakes no obligation to update forward-looking statements if circumstances or management's estimates or opinions should change except as required by applicable securities laws. The reader is cautioned not to place undue reliance on forward-looking statements. Statements concerning mineral reserve and resource estimates may also be deemed to constitute forward-looking statements to the extent they involve estimates of the mineralization that will be encountered if the property is developed. Reference is made to the most recent annual information form of Marengo filed with Canadian securities regulators which includes further discussion of the risk factors which may impact the business and operations of Marengo.
The information in this report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Mr. John Mears, a Competent Person who is a Member of The Australasian Institute of Mining and Metallurgy. Mr. Mears is a full-time consultant of Marengo Mining Limited.
Mr. Mears has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the 'Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Mr. Mears consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
Except to the extent not set out herein, for a (i) summary description of rock types, geological controls and dimensions of mineralized zones, and the identification of any significantly higher grade intervals within a lower grade intersection; (ii) a summary of the relevant analytical values, widths and, to the extent known, the true widths of the mineralized zones; (iii) a summary description of the geology, mineral occurrences and nature of the mineralization found; and (iv) a summary description of the type of analytical or testing procedures utilized, sampled, sample size, the name and location of each analytical or testing laboratory used and any relationship of the laboratory to the issuer please refer to the Company's technical report filed on SEDAR and dated November 9, 2007. There is no drilling, sampling, recovery or other factors that could materially affect the accuracy or reliability of the data referred to herein.
For further information on the Project and the resources contained therein, please refer to the Company's Canadian NI 43-101 and Australian JORC technical report "Yandera Copper Project, Madang Province, Papua New Guinea" (dated April 2012) which is available on the Company's website and at the (Canadian) SEDAR website.
Appendix 1 | ||||
Section 1 Sampling Techniques and Data | ||||
(Criteria in this section apply to all succeeding sections.) | ||||
Criteria | JORC Code Explanation | Commentary | ||
Sampling techniques | • Nature and quality of sampling (eg cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. | • Diamond drilling was used to collect samples for logging and assaying | ||
Drilling techniques | • Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). | • Diamond drilling was used for all holes in this drilling program | ||
Drill sample recovery | • Method of recording and assessing core and chip sample recoveries and results assessed. | • Core was measured and compared to the reported drill length | ||
Logging | • Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. | • Core was all geologically logged in detail, including lithology, alteration, mineralization, and oxidation | ||
Sub-sampling techniques and sample preparation | • If core, whether cut or sawn and whether quarter, half or all core taken. | • Core was split in half with a diamond-blade saw, generally in 2 meter intervals | ||
Quality of assay data and laboratory tests | • The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. | • QAQC data include standards and laboratory checks. Standards were inserted at a rate of 1 for every 20 core samples sampled at 2 m intervals and 1 for every 10 channel samples or rock grab samples | ||
Verification of sampling and assaying | • The verification of significant intersections by either independent or alternative company personnel. | • Data is validated while being entered into the database | ||
Location of data points | • Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. | • Drill collars are located initially with a hand-held GPS, and are later measured with DGPS | ||
Data spacing and distribution | • Data spacing for reporting of Exploration Results. | • Drill spacing was designed to test for the presence and limits of observed surface mineralization | ||
Orientation of data in relation to geological structure | • Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. | • Drill holes were angled, and designed to test conceptual orientations | ||
Sample security | • The measures taken to ensure sample security. | • Surface samples were bagged by geologists and geotechnicians. Bagged samples were shipped by transport contractor to the prep lab | ||
Audits or reviews | • The results of any audits or reviews of sampling techniques and data. | • Sampling techniques are periodically reviewed |
Section 2 Reporting of Exploration Results | ||||
(Criteria listed in the preceding section also apply to this section.) | ||||
Criteria | JORC Code Explanation | Commentary | ||
Mineral tenement and land tenure status | • Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. | • The Rima prospect is located within Exploration License 1335, which is 100% controlled by Marengo Mining Ltd | ||
Exploration done by other parties | • Acknowledgment and appraisal of exploration by other parties. | • Exploration work in the Rima area was completed by Marengo Mining Ltd employees and/or contractors | ||
Geology | • Deposit type, geological setting and style of mineralisation. | • Mineralization at Rima is porphyry-Cu style and is hosted in potassic and phyllic alteration, and is similar to mineralization observed at the Yandera Mineral Resource | ||
Drill hole Information | • A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes: | • A table with a summary of the drill hole information is provided above | ||
Data aggregation methods | • In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (eg cutting of high grades) and cut-off grades are usually Material and should be stated. | • Drill results reported are weighted averages of individual 2 m core samples that encompass an area with elevated copper concentrations, generally in excess of 0.1% copper | ||
Relationship between mineralisation widths and intercept lengths | • These relationships are particularly important in the reporting of Exploration Results. | • The true thickness of mineralization is not known, and the thickness is reported as drilled thickness | ||
Diagrams | • Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported These should include, but not be limited to a plan view of drill hole collar locations and appropriate sectional views. | • See figures associated with text | ||
Balanced reporting | • Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. | • Refer to table associated with text | ||
Other substantive exploration data | • Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples - size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. | • The exploration work included some geological surface mapping and examination of previous surface mapping and historical geophysical surveys | ||
Further work | • The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling). | •Refer to text and figures |
Appendix 2 | ||||||
Drill Hole Summary Table for Rima | ||||||
Locations were measured with hand-held GPS and are in the UTM AGD1966 Zone 55 projection. Azimuth is relative to projected north. TD is total (maximum) drilled depth. | ||||||
DH | Easting (m) | Northing (m) | RL (m) | AZIM | INCL | TD (m) |
YD560 | 290995 | 9366332 | 2029 | 134° | -60° | 200.7 |
YD561 | 290930 | 9366250 | 1990 | 065° | -65° | 263.4 |
YD562 | 290930 | 9366250 | 1990 | 245° | -65° | 300.6 |
YD563 | 290926 | 9366149 | 2047 | 058° | -65° | 239.9 |
ARBN: 161 356 930