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Coastal Gold Corp
Symbol COD
Shares Issued 131,236,780
Close 2014-01-15 C$ 0.025
Market Cap C$ 3,280,920
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Coastal Gold releases NI 43-101 Hope tailings resource

2014-01-16 08:15 ET - News Release

Dr. Bill Pearson reports

COASTAL GOLD REPORTS INFERRED TAILINGS RESOURCE OF 134,500 OZ GOLD AND 9.5 MILLION LBS COPPER AT HOPE BROOK GOLD PROJECT, NEWFOUNDLAND

Coastal Gold Corp. has released an initial National Instrument 43-101 mineral resource for the tailings deposits at its 100-per-cent-owned Hope Brook gold project in southwestern Newfoundland. The Hope Brook tailings mineral resource is based on a total of 73 vibracore drill holes totalling 155 metres that were completed during the fall of 2013 (see press releases dated Sept. 30 and Nov. 27, 2013). The mineral resource estimate is presented in the table.

Highlights

  • Overall inferred mineral resource in the tailings contains 134,500 ounces of gold and 9.5 million pounds copper;
  • Overall resource grade of 0.85 gram per tonne Au and 0.09 per cent Cu;
  • Tailings pond 1 contains higher gold and copper grades with 80,000 contained ounces gold and 5.9 million pounds copper;
  • Improved metallurgical results with gold recoveries up to 64 per cent from new testwork.

          MINERAL RESOURCE FOR GOLD AND COPPER, HOPE BROOK TAILINGS
                                                                        
                                      Tonnes     Au     Cu        Au     Cu
Category   Pond area                      (M)  (g/t)    (%)      (oz)  (Mlb)

Inferred   Tailings pond 1               2.6   0.95   0.10    80,000    5.9
Inferred   Tailings pond 2               2.3   0.75   0.07    54,400    3.6
Inferred   Pond 1 and pond 2 total       4.9   0.86   0.09   134,500    9.5

Resource statement cut-off grade is 0.45 g/t Au.

Dr. Bill Pearson, PGeo, president and chief executive officer of Coastal Gold, stated: "We are pleased with the results of the initial mineral resource on the Hope Brook tailings. The tailings resource is being considered in the preliminary economic assessment in progress as potential mill feed to either supplement the run-of-mine material or to provide stand-alone early feed for the project."

Mineral resource estimate

At the 0.45 g/t Au cut-off, tailings pond 1 contains an estimated 2.6 million tonnes grading 0.95 g/t Au and 0.10 per cent Cu, containing 80,000 ounces of gold and 5.9 million pounds of copper. Tailings pond 2 contains an estimated 2.3 million tonnes grading 0.75 g/t Au and 0.07 per cent copper, containing 54,400 ounces of gold and 3.6 million pounds of copper.

The combined total inferred mineral resource estimate for both ponds is 4.9 million tonnes grading 0.85 g/t Au and 0.09 per cent Cu, containing 134,500 ounces of gold and 9.5 million pounds of copper. All tailings pond resources are classified as inferred, and as such it cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category.

The mineral resource estimates are presented in the table at different cut-off grades to demonstrate the sensitivity of the mineral resources to change in grade. Approximately 40 per cent of the resource in tailings pond 1 is present at the one g/t Au cut-off grade indicating potential for initial production at higher grades.

    TAILINGS MINERAL RESOURCE ESTIMATES AT DIFFERENT GOLD CUT-OFF GRADES

Grade cut-off                Tonnes        Au        Cu        Au        Cu
(g/t)                            (M)     (g/t)       (%)      (oz)     (Mlb)

Tailings pond 1
Greater than 1.0                1.0      1.11      0.11    37,200       2.6
Greater than 0.8                2.1      1.00      0.11    66,900       4.9
Greater than 0.45               2.6      0.95      0.10    80,000       5.9
Tailings pond 2
Greater than 1.0                0.2      1.13      0.07     8,900       0.4
Greater than 0.8                0.6      0.99      0.07    19,200       0.9
Greater than 0.45               2.3      0.75      0.07    54,400       3.6
Total tailings resource inferred
Greater than 1.0                1.3      1.12      0.10    46,100       3.0
Greater than 0.8                2.7      1.00      0.10    86,100       5.8
Greater than 0.45               4.9      0.86      0.09   134,500       9.5

Resource statement cut-off grade is 0.45 g/t Au.

Notes on mineral resource estimation methodology

  1. Mineral resources are estimated in conformance with the CIM mineral resource definitions referred to in National Instrument 43-101. Pierre Desautels, PGeo, Principal resource geologist, and Jay Melnyk, PEng, principal mining engineer, both of AGP Mining Consultants and qualified persons under NI 43-101, who are independent of the company, have prepared and authorized the release of the mineral resource estimates presented herein. The vibracore drill hole database developed by Coastal Gold was validated by Michael Cullen, PGeo, of Mercator Geological Services, a qualified person as defined under NI 43-101, who is independent of the company.
  2. Bulk densities were determined by SGS Canada Inc. for a representative number of tailings samples using industry-standard methods. The bulk density used, 1.65 tonnes/cubic metre, is an average of six determinations made on tailings samples using a compacted bulk density measurement.
  3. The volume of the two tailing ponds was described using a 3-D wireframe envelope that was developed by Coastal Gold. The wireframes were based on a combination of vibracore drilling results and historic topographic information. The two wireframes describing tailings pond 1 and tailings pond 2 were validated by AGP and found to be acceptable for use in the resource model.
  4. The grade model was interpolated using a conventional inverse-distance-squared interpolated model based on two m length weighted composites of the tailing assays.
  5. No top cut was applied to the raw assays due to the normal distribution exhibited by both gold and copper raw assays. Drilling patterns for the vibracore holes were on a 100 m by 100 m grid and the model was interpolated in three passes from 100 m by 100 m, to 175 m by 175 m and finally 250 m by 250 m.
  6. A geological block model was generated using GEMS software. The block model matrix size is 25 metres by 25 metres by 50 metres. The volume reporting used partial models where the percentage of each block within the 3-D tailing wireframe envelope is used to calculate the volume of the material.
  7. A cut-off of 0.45 g/t was determined using a reduced milling cost from $12 per tonne as applied to rock, to an estimated cost of $10 per tonne where decreases in power consumption, and balls and mill liners are partially offset by the dredging and pumping costs. It is also assumed that the general and administrative cost would be covered by an open-pit operation on the Hope Brook deposit. An assumed 49-per-cent recovery at a price of $1,400 per ounce gold results in a cut-off of 0.45 g/t for the tailing material. Virtually all blocks in the pond models are above that value, therefore AGP concluded both ponds have reasonable prospect for economic extraction.
  8. The rounding of tonnes as required by NI 43-101 reporting guidelines may result in apparent differences between tonnes, grade and contained ounces.
  9. Mineral resources that are not mineral reserves do not have demonstrated economic viability. The estimate of mineral resources may be materially affected by environmental, permitting, legal, title, taxation, socio-political, marketing or other relevant issues.
  10. The quantity and grade of reported inferred mineral resources in this estimation are uncertain in nature, and there has been insufficient exploration to define these inferred mineral resources as indicated or measured mineral resources, and it is uncertain if further exploration will result in upgrading them to indicated or measured mineral resources.

Metallurgy

Two composited tailings samples were collected from the 2013 vibracore sampling program and submitted to ALS Metallurgy for flotation and cyanidation testwork under the direction of Lyn Jones, PEng, of AGP Mining Consultants. Leaching tests on high-grade (1.2 g/t Au) and low-grade (0.8 g/t Au) tailings composites resulted in cyanide leach gold extractions of 63.6 per cent and 45.6 per cent, respectively. The results were found to be consistent with the leach tests from previous testwork completed in 2012 (see press release dated Sept. 19, 2012) that indicated regrinding and releaching of the tails would result in extraction of 49 per cent of the contained gold from a composite sample grading 1.05 g/t Au.

In addition, a single flotation test on the high-grade tailings composite grading 0.09 per cent Cu (and using the optimized conditions from the Hope Brook master composite test program conducted in the fall of 2013) indicated a copper recovery of 61 per cent to an open-circuit second cleaner concentrate grading 21.4 per cent Cu. Further testwork is required to characterize these samples and optimize the metal recovery.

Shares-for-debt settlement

Coastal Gold has entered into a shares-for-debt settlement agreement whereby Coastal Gold will issue 245,000 common shares at a deemed price of five cents per share in settlement of dated accounts payable owing to a former employee of Coastal Gold in the amount of $12,250 (U.S.). The shares-for-debt settlement is subject to the approval of the TSX Venture Exchange.

Sampling, assaying and quality control

The vibracore drilling program is a low-impact coring method that allows for recovery of unconsolidated sediments using a four-inch-diameter aluminum core tube. The tailings core were logged, photographed and then split in half with one-half sent to the laboratory for analysis, and the other half retained and stored on-site. All core samples were prepared and assayed at ALS Minerals, with sample preparation done in Sudbury and analytical work done in North Vancouver. All locations of ALS Minerals are ISO 9001:2000 certified. The entire sample received was dried, weighed and crushed to 70 per cent passing one millimetre. A sample split of up to 1,000 grams was then pulverized to 85 per cent passing 75 microns (200 mesh) to produce a homogenized sample. A 50 g aliquot was used for fire assaying with an atomic absorption (AA) finish to determine gold concentration using method Au-AA25. Copper was initially analyzed using a four-acid digestion ICP (inductively coupled plasma-atomic emission spectrometry) method ME-ICP61. Any results for copper greater than 10,000 parts per million were assayed further by a four-acid digestion and ore-grade ICP method. Internal quality control included the use of blanks, duplicates and standards in every batch of samples. The company also conducted internal check assaying using certified external reference standards and blanks. Regular external check assays were performed at a second certified Canadian commercial laboratory. Coastal Gold also inserted external reference standards as well as blank silica sand in each sample batch as a further external check.

Qualified persons

David Copeland, PGeo, chief geologist, and Dr. Bill Pearson, PGeo, president and CEO of Coastal Gold, both qualified persons as defined by NI 43-101, have reviewed and approved the scientific and technical content of this news release. Pierre Desautels, PEng, principal resource geologist, and Jay Melnyk, PEng, principal mining engineer, both of AGP Mining Consultants and qualified persons under NI 43-101, who are independent of the company, have prepared and authorized the release of the mineral resource estimates presented herein. The vibracore drill hole database developed by Coastal Gold was reviewed and validated by Michael Cullen, PGeo, of Mercator Geological Services, a qualified person as defined under NI 43-101, who is independent of the company.

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