The Prospector News

i-80 Gold Intersects High-Grade Gold in Underground Drilling at Granite Creek

You have opened a direct link to the current edition PDF

Open PDF Close

Share this news article

i-80 Gold Intersects High-Grade Gold in Underground Drilling at Granite Creek






Including 41.3 g/t Au over 7.1 m & 16.0 g/t Au over 7.3 m


i-80 GOLD CORP. (TSX: IAU) (OTCQX: IAUCF)  is pleased to announce positive initial assay results from the ongoing underground drill program at the Company’s Granite Creek Property located in Humboldt County, Nevada.


High-grade results from drilling from the 4740 Level targeting mineralization in the Otto and Adam Peak fault horizons proximal to and below existing mine workings confirm consistency of mineralization in one of the initial areas being defined for underground mining (see Table 1). When combined with historic high–grade drilling in this area, that returned numerous high-grade results including 20.8 g/t Au over 6.1 m in hole PRC-13-084 and 17.8 g/t Au over 6.1 m in hole APRF-225, a continuous zone of mineralization is being defined that remains open at depth (see Figure 1).  The Otto fault horizon is one of the multiple target areas being drilled, and several holes intersected gold mineralization in multiple horizons.  The current program is expected to comprise more than 20,000 metres (m) from surface and underground with continued assay results to be provided as received.


Highlight results from initial underground drilling from Level 4740 include:

  • 41.3 g/t (grams per tonne) Au (gold) over 7.1 m in hole iGU21-07
  • 11.0 g/t Au over 3.4 m & 16.5 g/t Au over 3.0 m in hole iGU21-08
  • 16.0 g/t Au over 7.3 m in hole iGU21-09
  • 11.3 g/t Au over 4.6 m in hole iGU21-11
  • 10.5 g/t Au over 3.8 m in hole iGU21-12
  • 17.5 g/t Au over 2.3 m & 17.6 g/t Au over 2.0 m in hole iGU21-14


The primary goal of the 2021 drill program is to advance underground and open pit opportunities to production.  It is expected that refractory mineralization from the underground operation at Granite Creek will initially be trucked to Twin Creeks for processing, pursuant to the agreement recently entered into with Nevada Gold Mines, until such time that the Company’s Lone Tree facility is operational. A Preliminary Economic Assessment for Granite Creek is nearing completion and expected to be released in the near future.


Tyler Hill, Senior Geologist of i-80, commented: “These results confirm the high-grade opportunity that we are developing at Granite Creek and demonstrate excellent continuity of mineralization within the Otto and Adam Peak fault horizons that appear to broaden with depth.  Step-out drilling is being completed along strike and at depth, and we have intersected strong alteration and faulting in most holes drilled to-date”.


High-grade mineralization at Granite Creek occurs in a near-identical geological setting as that at the multi-million ounce Turquoise Ridge Mine located immediately to the north; proximal to a major regional fault (the Getchell or Range Front fault) on the eastern edge of the large Osgood Mountains intrusive complex.  The Granite Creek deposit remains open at depth and along strike from the existing underground workings and step-out drilling aimed at expanding resources is currently underway.


Table 1 – Summary Assay Results from Level 4740 Drilling


New 2021 Drill Results from Granite Creek

True Widths are 60%-90%

(Estimate Only – True Widths are Unknown)

Drillhole ID Zone Type From








iGU21-04 Ogee Core 121.6 123.1 1.5 11.7
iGU21-05 N/A Core 89.3 91.9 2.6 11.5
iGU21-05 Range Front Core 203.6 208.5 4.9 8.0
iGU21-07 Otto Core 119.8 126.9 7.1 41.3
iGU21-07 Adam Peak Core 150.3 153.3 3.0 6.8
iGU21-08 Otto Core 99.6 103.0 3.4 11.0
iGU21-08 Adam Peak Core 150.6 153.6 3.0 16.5
iGU21-09 Adam Peak Core 136.9 144.2 7.3 16.0
iGU21-09 Range Front Core 151.2 157.9 6.7 6.4
iGU21-10 N/A Core 75.9 77.4 1.5 38.9
iGU21-10 Otto Core 116.4 117.4 1.0 15.8
iGU21-11 Otto Core 133.5 138.1 4.6 11.3
iGU21-12 Otto Core 163.8 167.6 3.8 10.5
iGU21-13 Otto Core 126.7 128.0 1.3 6.9
iGU21-13 Range Front Core 176.8 178.3 1.5 12.1
iGU21-14 N/A Core 59.6 61.9 2.3 7.6
iGU21-14 Otto Core 80.9 83.2 2.3 17.5
iGU21-14 Adam Peak Core 100.3 102.3 2.0 17.6
iGU21-14 Range Front Core 126.5 131.2 4.7 6.9
Table 1a

Collar Coordinates

UTM Drillhole ID East m North m Elevation m Azimuth Dip
NAD83 Zone 11 iGU21-04 478175 4554229 1446 152 -62
iGU21-05 478173 4554232 1446 334 -68
iGU21-07 478172 4554232 1446 311 -61
iGU21-08 478172 4554232 1446 291 -65
iGU21-09 478172 4554231 1446 284 -54
iGU21-10 478172 4554231 1446 279 -46
iGU21-11 478172 4554232 1446 299 -61
iGU21-12 478172 4554232 1446 331 -73
iGU21-13 478172 4554232 1446 301 -77
iGU21-14 478172 4554234 1447 340 -30



The Granite Creek Property is strategically located proximal to Nevada Gold Mines’ Turquoise Ridge and Twin Creeks mines at the north end of the Battle Mountain-Eureka Trend, at its intersection with the Getchell gold belt in Nevada (See Figure 2).



The majority of the ongoing program, expected to consist of more than 20,000 metres of drilling, is focused on defining and expanding mineralization within several high-grade target areas proximal to existing underground mine workings at Granite Creek. i-80 has completed initial underground rehabilitation and has commenced underground drilling. As part of an aggressive plan to re-commence mining from underground, the Company is in the process of rehabilitating several areas for the purposes of commencing test mining in H2-2021.


QAQC Procedures


All samples were submitted to either American Assay Laboratories (AAL) or Paragon Geochemical Assay Laboratories both of Sparks, NV, which are ISO 9001 and 17025 certified and accredited laboratories, independent of the Company. Samples submitted through PAL and AAL are run through standard prep methods and analysed using FA-Pb30-ICP (Au; 30g fire assay) and 48MA-MS (48 element Suite; 0.5g 4–acid digestion/ICP-MS) methods. PAL and AAL also undertake their own internal coarse and pulp duplicate analysis to ensure proper sample preparation and equipment calibration. i-80 Gold Corp’s QA/QC program includes regular insertion of CRM standards, duplicates, and blanks into the sample stream with a stringent review of all results. Historic holes PRC-13-084 and APRF-225 were assayed by Inspectorate American Laboratories (IAL) in Sparks, NV, which was an ISO 9002 accredited facility. Samples submitted through IAL and were run through standard prep methods and analysed using a 30 gram fire assay. Historic hole BRFC-026 was assayed by AAL with standard prep methods and analysed using a 30 gram fire assay.


Qualified Person


Tim George, PE, Manager of Engineering Services, reviewed the technical and scientific information contained in this press release and is a Qualified Person within the meaning of NI 43-101.


About i-80 Gold Corp.


i-80 Gold Corp. is a well-financed, Nevada-focused, mining company with a goal of achieving mid-tier gold producer status through the development of multiple deposits within the Company’s advanced-stage property portfolio to complement existing gold production from the Ruby Hill open pit.


Posted October 28, 2021

Share this news article


American Lithium Arranges $7,160,000 Strategic Investment in Surge Battery Metals

American Lithium Corp. (TSX-V:LI) (NASDAQ:AML) (Frankfurt:5LA1) a... READ MORE

June 2, 2023

Treasury Metals Announces Closing of Private Placement Financing

Treasury Metals Inc. (TSX: TML) (OTCQX: TSRMF) is pleased to anno... READ MORE

June 2, 2023

Reunion Gold Announces Additional Drill Results From Its Oko West Project, Guyana, Highlighted by Hole D-254 Which Intersected 120.7 M @ 3.13 g/t Au Including High Grade Intercepts Of 35.2 M @ 7.42 g/t Au and 8.4 M @ 9.65 g/t Au

Results continue to confirm the existence and continuity o... READ MORE

June 2, 2023

President of Ecuador Signs Environmental Consultation Decree Clearing the Path for the Final Stage of Environmental Licensing for El Domo - Curipamba Project

Adventus Mining Corporation (TSX-V: ADZN) (OTCQX: ADVZF) and Salazar Res... READ MORE

June 1, 2023

Madison Metals Signs Multi-Year Uranium Forward Sales Agreement

Madison Metals Inc. (CSE: GREN) (OTCQB: MMTLF) is pleased to anno... READ MORE

June 1, 2023

Copyright 2023 The Prospector News