Overview
Status | Care and Maintenance |
Mine Type | Underground |
Commodities |
|
Mining Method |
- Overhand Cut & Fill
- Drift & Fill
- Longhole stoping
- Cemented (undefined) backfill
|
Production Start | ... |
Holt Mine Complex consists of three past-producing mines: The Holt Mine and Mill and the Holloway Mine, and the Taylor Mine located approximately 68 km by road west of the Holt Mill.
The Holt mill, which is currently on care and maintenance, has a capacity of 3,000 tpd and a fully permitted tailings storage facility. The Company plans to evaluate the potential to integrate a number of satellite deposits with the existing infrastructure in the region. |
Source:
p. 1
St Andrew Goldfields Ltd. is a wholly-owned subsidiary of Kirkland Lake Gold Ltd.
Kirkland Lake Gold Ltd owns the Holt Complex, which includes three wholly owned mines, the Taylor mine (“Taylor”), Holt mine (“Holt”) and Holloway mine (“Holloway”), as well as a central milling facility, the Holtmill.
February 8, 2022 – Agnico Eagle Mines Limited and Kirkland Lake Gold Ltd. are pleased to announce the successful completion of the previously announced merger of equals transaction (the “Merger”).
The combined company will continue as Agnico Eagle Mines Limited.
Contractors
- Subscription is required.
Deposit Type
- Vein / narrow vein
- Porphyry
Summary:
Regional Geology
The Taylor Mine Complex is located along the Porcupine-Destor Fault Zone (PDF), a major structural feature associated with globally significant gold deposits lying within the Abitibi Greenstone Belt of northeastern Ontario and north-western Quebec.
Local and Property Geology
The Taylor Mine Complex is almost entirely covered by glacial overburden, ranging from 3 m to 60 m in thickness (generally 30 m to 40 m thick). Thus, interpretations of the property geology have been made principally from diamond drill hole information as well as the underground excavations in the shaft and ramp areas developed in the Shaft Deposit.
The Taylor Mine Complex is located along the PDF in its central portion, approximately 60 km east of the main gold producers in the vicinity of Timmins. The PDF in the area of the Taylor Mine Complex strikes roughly east-west, and dips to the south between 40° and 60°, with the majority of the property lying to the south of the projected trace of the PDF. The PDF is a complex structural zone and it is more accurately described as a zone of tens of metres width, along which are contained many individual zones of movement. In the Taylor property area, the footwall of the PDF is considered to be a thick series of relatively undeformed and unaltered metasedimentary rocks intersected to the footwall.
Mineralization
The Taylor Mineralization is in close proximity, within the hanging ........
Mining Methods
- Overhand Cut & Fill
- Drift & Fill
- Longhole stoping
- Cemented (undefined) backfill
Summary:
The Taylor Mine consists of a few zones: the Shoot Deposit (located on the west side of the property), the West Porphyry Deposit (WPZ), the East Porphyry Deposit and the Shaft Deposit (located on the east side of the property).
The WPZ extend vertically about 600 m and is mostly open at depth. The WPZ is accessed via a ramp and mined by overhand cut and fill method (for shallow dip ore zones) or longhole stoping (where the ore zones dip at an angle greater than 45°). Ore and waste are trucked to surface where the ore is loaded into surface trucks for haulage to the Holt mill and the waste is stockpiled on designated surface areas.
Overhand Cut and Fill (OC&F) and Drift and Fill (D&F) were selected as the most suitable mining methods:
- Where the ore is dipping at less than 45° and the ore horizontal width is narrower than 10 m, OC&F is the method of choice;
- Where the ore is dipping at less than 45° and the ore horizontal width exceeds 10 m, D&F will be the method of choice.
Where the ore is dipping at more than 45°, longhole mining will be the method of choice, requiring minimum mining width of 3 m. Waste rock generated by development activities is the source of backfill (whether cemented or not).
Upon examination of the mining shapes, the geologist applied a dilution factor varying from approximately 10% to 50% and a dilution grade ranging from approximately 0.5 g/t to 1.0 g/t. Mining extraction varied from approximatel ........
Flow Sheet:
Surface ore storage is a total of 4,900 t in three silos, the Holt headframe bin (900 t) and two other separate storage bins (1,000 t and 3,000 t).
The grinding circuit consists of a 5 m diameter by 6.1 m long Allis Chalmers ball mill, converted to a SAG mill, a 4 m diameter by 5.5 m long Allis Chalmers ball mill and a 3.6 m diameter by 4.9 m long tertiary ball mill, all operating in series and in closed circuit. The grinding circuit is controlled by an expert system and fuzzy logic.
Flow Sheet:
Summary:
- subscription is required.
Source:
- subscription is required.
Production:
All production numbers are expressed as metal in doré.
- Subscription is required.
Operational Metrics:
Metrics | 2018 | 2017 | 2016 |
Tonnes milled
| 382,059 t | 292,003 t | 199,231 t |
Daily mining rate
| | | 600 t |
Reserves at December 31, 2018:
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven & Probable
|
751 kt
|
Gold
|
4.9 g/t
|
117 koz
|
Measured & Indicated
|
826 kt
|
Gold
|
5 g/t
|
133 koz
|
Inferred
|
1,988 kt
|
Gold
|
5.3 g/t
|
337 koz
|
Commodity Production Costs:
| Commodity | Units | 2018 | 2017 |
Cash costs (sold)
|
Gold
|
USD
|
709 / oz
|
610 / oz
|
All-in sustaining costs (sold)
|
Gold
|
USD
|
1,007 / oz
|
972 / oz
|
Financials:
| Units | 2018 | 2017 |
Sustaining costs
|
M USD
|
16.3
|
5.3
|
Capital expenditures
|
M USD
|
19.7
|
18.4
|
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.