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Provenance Gold Reports Strong Gold Recovery Results From Gravity and Flotation Tests on Bulk Samples From Its Eldorado Property

Provenance Gold Reports Strong Gold Recovery Results From Gravity and Flotation Tests on Bulk Samples From Its Eldorado Property

Provenance Gold报告称,对其埃尔多拉多地产的散装样品进行重力和浮选测试后,黄金回收率良好
newsfile ·  02/07 07:00

Vancouver, British Columbia--(Newsfile Corp. - February 7, 2024) - Provenance Gold Corp. (CSE: PAU) (OTCQB: PVGDF) (the "Company" or "Provenance") is pleased to report the results of its recent metallurgical testing program of bulk samples from the Eldorado Project.

不列颠哥伦比亚省温哥华--(新闻档案公司,2024年2月7日)——Provenance Gold Corp.(CSE:PAU)(OTCQB:PVGDF)(the”公司“或”来源“)很高兴地报告其最近对埃尔多拉多项目散装样品的冶金测试计划的结果。

Highlights

亮点

  • FLSmidth Dawson Metallurgical Testing Laboratories ("Dawson"), a well-recognized flotation testing and flowsheet designer, tested seven bulk samples collected from Provenance's recent RC drilling program (Table 1).
  • Much of the Eldorado deposit is unoxidized. These results suggest that gold recoveries will be excellent even in the unoxidized portion and that much of the gold at Eldorado could be recovered without the use of cyanide.
  • An overall average of 88.1% (77.9-97.1%) of the gold in the unoxidized sulfide samples was recovered by gravity concentration followed by bulk sulfide flotation of the gravity tailings. The 46.1 % recovery in ED01 is due to oxidation. The methods used in the testing recovered only free gold and sulfides. Oxidized gold can be recovered by other standard techniques.
  • Liberated free milling gold was found in all samples tested.
  • The larger sample size minimized assay variation caused by the "nugget effect".
  • The results confirm positive metallurgical testing by Billiton and ICAN.
  • Dawson noted that the testing did not attempt to optimize recoveries, but demonstrated the gold will be recoverable.
  • flsMidth 道森冶金测试实验室 (”道森“)是一位知名的浮选测试和流程图设计师,他测试了从Provenance最近的RC钻探计划中收集的七个散装样品(表1)。
  • 埃尔多拉多矿床的大部分是未氧化的。这些结果表明,即使在未氧化的部分,黄金的回收率也将非常好,而且埃尔多拉多的大部分黄金可以在不使用氰化物的情况下回收。
  • 未氧化硫化物样品中金的总体平均值为88.1%(77.9-97.1%),是通过重力浓度回收的,然后对重力尾矿进行散装硫化物浮选。ED01 中 46.1% 的回收率是由氧化引起的。测试中使用的方法仅回收游离金和硫化物。氧化金可以通过其他标准技术回收。
  • 在所有测试样本中都发现了释放的自由研磨金。
  • 较大的样本量最大限度地减少了 “金块效应” 引起的测定变异。
  • 结果证实了比尔顿和ICAN的冶金测试呈阳性。
  • 道森指出,测试并未试图优化回收率,但表明黄金是可以开采的。

Table 1 - New Assay and Recovery Results from Gravity and Flotation Tests Completed on Seven Bulk Sample Composites

表 1 -对七种散装样品复合材料完成了重力和浮选测试的新分析和回收结果

Sample Au Assay (ppm) Au Distributed in Grav+Flot Cons (% recovered) Comments
Head Direct
(50g)
Head Back Calc from test (3 kg)
ED01 0.61 1.51 46.1 Oxidized
ED03 15.50 5.39 93.8 Unoxidized
ED04 1.60 1.82 82.6 Unoxidized
ED07 13.44 22.34 97.1 Unoxidized
ED09 0.54 1.19 77.9 Unoxidized
ED10 0.22 0.40 83.3 Unoxidized
ED11 4.86 6.35 94.0 Unoxidized
示例 金测定 (ppm) Au 分布在 Grav+Flot Cons 中(回收百分比) 评论意见
直接
(50 克)
测试后的头部背部计算(3 kg)
ED01 0.61 1.51 46.1 氧化
ED03 15.50 5.39 93.8 未氧化
ED04 1.60 1.82 82.6 未氧化
ED07 13.44 22.34 97.1 未氧化
ED09 0.54 1.19 77.9 未氧化
ED10 0.22 0.40 83.3 未氧化
ED11 4.86 6.35 94.0 未氧化

Variable samples were recovered from each hole listed in Column 1 above and blended into one bulk sample per hole. Column 2 shows fire assays for 50 gm head samples that were taken from each bulk sample. Column 3 shows gold assays (the most accurate because of their size) for each bulk 3kg sample. All samples but one increased with the bulk tests.

从上文第 1 栏中列出的每个孔中回收了可变样品,并混合成每个孔的一个散装样品。第 2 列显示了对从每个散装样本中采集的 50 gm 头部样本的火焰试验。第 3 列显示了每个 3 kg 散装样本的金化验结果(由于其大小而最准确)。随着批量测试,除了一个样本外,所有样本都增加了。

Provenance Chairman, Rauno Perttu, stated, "As expected with large gold systems that contain free gold, some high-grade head assays will decline in bulk testing, but the moderate-grade and low-grade assays will overall increase. Because this property, like bulk deposits in general, contains a much larger volume of modest grade mineralization, we expect the bulk overall grade to experience a significant net increase. The presence of visible free gold in all samples including our lower grade Eldorado samples, supports this expectation. Should gold recovery utilizing only gravity and flotation be implemented, that form of recovery may offer an additional upside. Smelters will often pay full gold price on the gold contained in a sulfide concentrate and even a bonus because the sulfide improves smelter efficiency, reducing the smelter's operating costs."

Provence董事长Rauno Perttu表示:“正如预期的那样,对于含有游离金的大型黄金系统,一些高等级的头部化验在批量测试中将有所下降,但中等级和低等级的分析总体上将增加。由于该特性与一般的散装矿床一样,含有更多的中等品位矿化物,因此我们预计散装总品位将出现显著的净增长。包括我们较低等级的Eldorado样品在内的所有样品中都存在可见的游离金,这支持了这一预期。如果仅利用重力和浮选进行黄金回收,这种形式的回收可能会提供额外的上行空间。冶炼厂通常会为硫化物精矿中所含的黄金支付全额金价,甚至还要支付奖金,因为硫化物提高了冶炼厂的效率,降低了冶炼厂的运营成本。”

Historic metallurgy studies suggested that recoveries from both the oxide and sulfide would be excellent utilizing cyanide. These recent results suggest that excellent gold recovery is possible even without the use of cyanide.

历史冶金研究表明,利用氰化物可以很好地回收氧化物和硫化物。最近的这些结果表明,即使不使用氰化物,也有可能实现出色的黄金回收率。

Historical Metallurgical Testing

历史冶金测试

  • In 1989, Dawson tested different samples from the Eldorado property for ICAN Minerals. The historic tests recovered more than 90% of the gold by a three-step method of gravity separation, flotation and cyanide.
  • In 1990, Mountain States R&D International conducted bottle roll cyanide tests on both oxidized and sulfide samples from the Eldorado property for Billiton Minerals USA. As quoted from their report: "The Oregon gold bearing sulfides responded well to a bottle roll cyanide leach. Gold recoveries without grinding were 71, 76, and 77 percent. Grinding increased recoveries to 92, 86, and 93 percent, respectively."
  • 1989年,道森为ICAN Minerals测试了来自埃尔多拉多地产的不同样本。历史性测试通过重力分离、浮选和氰化物三步法回收了90%以上的黄金。
  • 1990年,山州研发国际对来自美国必利顿矿业公司的埃尔多拉多地产的氧化和硫化物样品进行了瓶装氰化物测试。正如他们的报告所引述的那样:“俄勒冈州的含金硫化物对瓶装氰化物浸出反应良好。未经研磨的黄金回收率分别为71%、76%和77%。磨削使回收率分别提高到92%、86%和93%。”

Eldorado Geological Summary

埃尔多拉多地质摘要

The magmatic/hydrothermal mineralization located at Eldorado is interpreted as a porphyry gold system. Mineralization is controlled by both strong fracture development and pyrite veining coincident with gold mineralization. Pyrite veining is common with gold being found in veinlets, fractures, and hydrothermal breccia. The overall sulfide content of this deposit is significantly less than 5 percent.

位于埃尔多拉多的岩浆/热液矿化被解释为斑岩金系统。矿化是由强烈的裂缝发育和与金矿化相吻合的黄铁矿脉来控制的。黄铁矿脉很常见,在矿脉、裂缝和热液角砾岩中发现了金。该矿床的总硫化物含量明显低于5%。

Surface geological work, historic placer mining, drone information and scattered historic drill holes well beyond the area of the initial Provenance drill holes indicate the gold system extends far outward in all directions. The 2023 program also began to confirm that the gold system extends to much greater depth than the majority of the historic drilling. The success of the 2023 drill program coupled with historic drilling that intersected gold far beyond the 2023 program would suggest that the mineralized system at Eldorado is large, starts at the surface and extends to depth.

地表地质工作、历史砂矿开采、无人机信息以及远远超出最初Provenance钻孔区域的分散的历史钻孔表明,金系向四面八方延伸得很远。2023年的计划还开始证实,黄金系统的深度比大多数历史钻探要大得多。2023年钻探计划的成功加上与黄金相交的历史性钻探,远远超出了2023年计划,这表明埃尔多拉多的矿化系统很大,从地表开始一直延伸到深度。

Sampling Procedure

采样程序

Nineteen (19) individual samples were received at the FLS test facility in November 2023 and assigned lot number P23070. These samples weighed between 4.5 and 18 kilograms and contained material up to 1⁄4 inch (3 mesh) in size. Seven (7) composite samples weighing four (4) kilograms each were produced by rotary splitting of the individual samples. Each 4-kilogram sample was then stage crushed through 10 mesh and a one (1) kilogram sample rotary split out. A 50-gram sample was sub split from the kilogram split, pulverized, and submitted for gold analysis by standard fire assay and for sulfide sulfur analysis by a LECO analyzer.

FLS 测试设施于 2023 年 11 月收到了十九 (19) 份个人样本,批号为 P23070。这些样品重量在 4.5 到 18 千克之间,所含材料大小可达 1⁄4 英寸(3 个网格)。七(7)个复合样品均重达四(4)千克,是通过旋转分割单个样品制成的。然后,将每个 4 千克的样品分级粉碎 10 个网格,然后旋转分离出一 (1) 千克的样品。将50克样本从千克的分离中分离出来,粉碎,然后通过标准火法进行金分析,并提交给LECO分析仪进行硫化硫分析。

The remaining three (3) kilogram samples of each composite were subjected to laboratory testing to determine gold content by back-calculation from the test products generated. Each sample was rod mill ground to approximately 300 microns top size and subjected to a Knelson centrifugal concentration step. The Knelson concentrate was further concentrated by hand panning to reduce the sample volume that was subsequently fire assayed to extinction. The hand pan tailings were then combined with the Knelson tailings and subjected to bulk sulfide flotation using Xanthate and thionocarbamate collectors. The bulk sulfide concentrates, and flotation tailings were then assayed for gold by standard fire assay.

对每种复合物的其余三(3)千克样品进行了实验室测试,通过对生成的测试产品进行反向计算来确定金含量。每个样品均经过棒磨机研磨至大约 300 微米的最大尺寸,并经过 Knelson 离心浓缩步骤。通过手工平移进一步浓缩了克内尔森浓缩物,以减少样品量,随后经过火检直至灭绝。然后,将手盘尾矿与克尼尔森尾矿混合,使用黄原酸盐和硫代氨基甲酸酯收集器进行散装硫化物浮选。然后,通过标准火法对散装硫化物浓缩物和浮选尾矿进行金检验。

Qualified Person

合格人员

The technical content disclosed in this press release was reviewed and approved by Jo Price, P.Geo., M.Sc., a Qualified Person as defined under National Instrument 43-101.

本新闻稿中披露的技术内容已由美国国家仪器43-101规定的合格人员Jo Price,P.Geo.,理学硕士审查和批准。

About Provenance Gold Corp.

关于普罗旺斯黄金公司

Provenance Gold Corp. is a precious metals exploration company with a focus on gold and silver mineralization within North America. The Company currently holds interests in Nevada, and eastern Oregon, USA. For further information please visit the Company's website at or contact Rob Clark at rclark@provenancegold.com.

Provenance Gold Corp. 是一家贵金属勘探公司,专注于北美的金银矿化。该公司目前在美国内华达州和俄勒冈州东部持有权益。欲了解更多信息,请访问公司的网站或通过 rclark@provenancegold.com 与 Rob Clark 联系。

On behalf of the Board,
Provenance Gold Corp.
Rauno Perttu, Chief Executive Officer

代表董事会,
Provenance Gol
Rauno Perttu,首席执行官

Safe Harbor Statement: Neither the Canadian Securities Exchange, nor its regulation services provider, accepts responsibility for the adequacy or accuracy of this press release. This news release may contain certain "Forward-Looking Statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 and applicable Canadian securities laws. When or if used in this news release, the words "anticipate", "believe", "estimate", "expect", "target, "plan", "forecast", "may", "schedule" and similar words or expressions identify forward-looking statements or information. Such statements represent the Company's current views with respect to future events and are necessarily based upon a number of assumptions and estimates that, while considered reasonable by the Company, are inherently subject to significant business, economic, competitive, political and social risks, contingencies and uncertainties. Many factors, both known and unknown, could cause results, performance or achievements to be materially different from the results, performance or achievements that are or may be expressed or implied by such forward-looking statements. The Company does not intend, and does not assume any obligation, to update these forward-looking statements or information to reflect changes in assumptions or changes in circumstances or any other events affecting such statements and information other than as required by applicable laws, rules and regulations.

安全港声明: 加拿大证券交易所及其监管服务提供商均不对本新闻稿的充分性或准确性承担责任。本新闻稿可能包含1995年《美国私人证券诉讼改革法》和适用的加拿大证券法所指的某些 “前瞻性陈述”。当或如果在本新闻稿中使用,“预期”、“相信”、“估计”、“预期”、“目标”、“计划”、“预测”、“可能”、“时间表” 等词语或表达方式表示前瞻性陈述或信息。此类陈述代表了公司当前对未来事件的看法,必然基于许多假设和估计,尽管公司认为这些假设和估计是合理的,但本质上会受到重大的商业、经济、竞争、政治和社会风险、突发事件和不确定性的影响。许多因素,包括已知和未知因素,都可能导致业绩、业绩或成就与此类前瞻性陈述所表达或可能表达或暗示的业绩、业绩或成就存在重大差异。除非适用法律、规章和法规的要求,否则公司无意更新这些前瞻性陈述或信息以反映假设的变化或情况变化或影响此类陈述和信息的任何其他事件,也不承担任何义务。

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