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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報告稱,對其埃爾多拉多地產的散裝樣品進行重力和浮選測試後,黃金回收率良好
newsfile ·  02/07 04:00

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.

不列顛哥倫比亞省溫哥華--(新聞檔案公司,2024年2月7日)——Provenance Gold Corp.(CSE:PAU)(OTCQB:PVGDF)(the”公司“或”來源“)很高興地報告其最近對埃爾多拉多項目散裝樣品的冶金測試計劃的結果。

Highlights

亮點

  • 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 道森冶金測試實驗室 (”道森“)是一位知名的浮選測試和流程圖設計師,他測試了從Provenance最近的RC鑽探計劃中收集的七個散裝樣品(表1)。
  • 埃爾多拉多礦牀的大部分是未氧化的。這些結果表明,即使在未氧化的部分,黃金的回收率也將非常好,而且埃爾多拉多的大部分黃金可以在不使用氰化物的情況下回收。
  • 未氧化硫化物樣品中金的總體平均值爲88.1%(77.9-97.1%),是通過重力濃度回收的,然後對重力尾礦進行散裝硫化物浮選。ED01 中 46.1% 的回收率是由氧化引起的。測試中使用的方法僅回收遊離金和硫化物。氧化金可以通過其他標準技術回收。
  • 在所有測試樣本中都發現了釋放的自由研磨金。
  • 較大的樣本量最大限度地減少了 “金塊效應” 引起的測定變異。
  • 結果證實了比爾頓和ICAN的冶金測試呈陽性。
  • 道森指出,測試並未試圖優化回收率,但表明黃金是可以開採的。

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

表 1 -對七種散裝樣品複合材料完成了重力和浮選測試的新分析和回收結果

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 金測定 (ppm) Au 分佈在 Grav+Flot Cons 中(回收百分比) 評論意見
直接
(50 克)
測試後的頭部背部計算(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.

從上文第 1 欄中列出的每個孔中回收了可變樣品,並混合成每個孔的一個散裝樣品。第 2 列顯示了對從每個散裝樣本中採集的 50 gm 頭部樣本的火焰試驗。第 3 列顯示了每個 3 kg 散裝樣本的金化驗結果(由於其大小而最準確)。隨着批量測試,除了一個樣本外,所有樣本都增加了。

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董事長Rauno Perttu表示:“正如預期的那樣,對於含有遊離金的大型黃金系統,一些高等級的頭部化驗在批量測試中將有所下降,但中等級和低等級的分析總體上將增加。由於該特性與一般的散裝礦牀一樣,含有更多的中等品位礦化物,因此我們預計散裝總品位將出現顯著的淨增長。包括我們較低等級的Eldorado樣品在內的所有樣品中都存在可見的遊離金,這支持了這一預期。如果僅利用重力和浮選進行黃金回收,這種形式的回收可能會提供額外的上行空間。冶煉廠通常會爲硫化物精礦中所含的黃金支付全額金價,甚至還要支付獎金,因爲硫化物提高了冶煉廠的效率,降低了冶煉廠的運營成本。”

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.

歷史冶金研究表明,利用氰化物可以很好地回收氧化物和硫化物。最近的這些結果表明,即使不使用氰化物,也有可能實現出色的黃金回收率。

Historical Metallurgical Testing

歷史冶金測試

  • 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,道森爲ICAN Minerals測試了來自埃爾多拉多地產的不同樣本。歷史性測試通過重力分離、浮選和氰化物三步法回收了90%以上的黃金。
  • 1990年,山州研發國際對來自美國必利頓礦業公司的埃爾多拉多地產的氧化和硫化物樣品進行了瓶裝氰化物測試。正如他們的報告所引述的那樣:“俄勒岡州的含金硫化物對瓶裝氰化物浸出反應良好。未經研磨的黃金回收率分別爲71%、76%和77%。磨削使回收率分別提高到92%、86%和93%。”

Eldorado Geological Summary

埃爾多拉多地質摘要

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.

位於埃爾多拉多的岩漿/熱液礦化被解釋爲斑岩金系統。礦化是由強烈的裂縫發育和與金礦化相吻合的黃鐵礦脈來控制的。黃鐵礦脈很常見,在礦脈、裂縫和熱液角礫岩中發現了金。該礦牀的總硫化物含量明顯低於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.

地表地質工作、歷史砂礦開採、無人機信息以及遠遠超出最初Provenance鑽孔區域的分散的歷史鑽孔表明,金系向四面八方延伸得很遠。2023年的計劃還開始證實,黃金系統的深度比大多數歷史鑽探要大得多。2023年鑽探計劃的成功加上與黃金相交的歷史性鑽探,遠遠超出了2023年計劃,這表明埃爾多拉多的礦化系統很大,從地表開始一直延伸到深度。

Sampling Procedure

採樣程序

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 測試設施於 2023 年 11 月收到了十九 (19) 份個人樣本,批號爲 P23070。這些樣品重量在 4.5 到 18 千克之間,所含材料大小可達 1⁄4 英寸(3 個網格)。七(7)個複合樣品均重達四(4)千克,是通過旋轉分割單個樣品製成的。然後,將每個 4 千克的樣品分級粉碎 10 個網格,然後旋轉分離出一 (1) 千克的樣品。將50克樣本從千克的分離中分離出來,粉碎,然後通過標準火法進行金分析,並提交給LECO分析儀進行硫化硫分析。

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.

對每種複合物的其餘三(3)千克樣品進行了實驗室測試,通過對生成的測試產品進行反向計算來確定金含量。每個樣品均經過棒磨機研磨至大約 300 微米的最大尺寸,並經過 Knelson 離心濃縮步驟。通過手工平移進一步濃縮了克內爾森濃縮物,以減少樣品量,隨後經過火檢直至滅絕。然後,將手盤尾礦與克尼爾森尾礦混合,使用黃原酸鹽和硫代氨基甲酸酯收集器進行散裝硫化物浮選。然後,通過標準火法對散裝硫化物濃縮物和浮選尾礦進行金檢驗。

Qualified Person

合格人員

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.

本新聞稿中披露的技術內容已由美國國家儀器43-101規定的合格人員Jo Price,P.Geo.,理學碩士審查和批准。

About Provenance Gold Corp.

關於普羅旺斯黃金公司

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. 是一家貴金屬勘探公司,專注於北美的金銀礦化。該公司目前在美國內華達州和俄勒岡州東部持有權益。欲了解更多信息,請訪問公司的網站或通過 rclark@provenancegold.com 與 Rob Clark 聯繫。

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

代表董事會,
Provenance Gol
Rauno Perttu,首席執行官

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.

安全港聲明: 加拿大證券交易所及其監管服務提供商均不對本新聞稿的充分性或準確性承擔責任。本新聞稿可能包含1995年《美國私人證券訴訟改革法》和適用的加拿大證券法所指的某些 “前瞻性陳述”。當或如果在本新聞稿中使用,“預期”、“相信”、“估計”、“預期”、“目標”、“計劃”、“預測”、“可能”、“時間表” 等詞語或表達方式表示前瞻性陳述或信息。此類陳述代表了公司當前對未來事件的看法,必然基於許多假設和估計,儘管公司認爲這些假設和估計是合理的,但本質上會受到重大的商業、經濟、競爭、政治和社會風險、突發事件和不確定性的影響。許多因素,包括已知和未知因素,都可能導致業績、業績或成就與此類前瞻性陳述所表達或可能表達或暗示的業績、業績或成就存在重大差異。除非適用法律、規章和法規的要求,否則公司無意更新這些前瞻性陳述或信息以反映假設的變化或情況變化或影響此類陳述和信息的任何其他事件,也不承擔任何義務。

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