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United States
Summit Mine

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 Location:
64 km NW from Lordsburg, New Mexico, United States

  Address:
181 Bay Street Suite 1800
Toronto
Ontario, Canada
87125
Phone  ...  Subscription required
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Overview

StatusCare and Maintenance
Mine TypeUnderground
Commodities
  • Gold
  • Silver
  • Gold Equivalent
Mining Method
  • Cut & Fill
  • Longhole stoping
Production Start...
Mine Life7 years (as of Jan 1, 2014)
The site has been on care and maintenance since November 2013 but has maintained all the necessary permits to re-start operations.


Owners

Source: p. 6, 10-11
CompanyInterestOwnership
Golconda Gold Ltd. 100 % Indirect
Summit Gold Corporation 100 % Direct

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Epithermal
  • Vein / narrow vein


Summary:

The Summit Mine and Steeple Rock District lie on the southern edge of the mid-Tertiaryage, Datil-Mogollon volcanic field. The volcanic sequence comprises up to 8,000 feet of highly diverse volcanic and volcaniclastic rocks representing multiple eruptions from different vents. Thick sequences of andesitic and dacitic lava flows are interbedded with volcaniclastic and fluvial sediments. The flow rocks are typically porphyritic. Numerous high-silica rhyolites (Miocene-age) have intruded the lava flows. Thin tuffaceous units are associated with some of these intrusive bodies. The rock units generally trend northwesterly and dip moderately to gently to the northeast.

Small outcrops of Precambrian igneous rocks, Cretaceous sedimentary rocks and Cretaceous-Eocene sedimentary rocks crop out south of the district. Although these rocks are not exposed in the Steeple Rock district, they probably underlie the thick Tertiary volcanic sequence exposed in the district.

Gold and silver mineralization occur in an epithermal, low-sulfidation system containing less than 1% very-fine-grained, disseminated pyrite and trace amounts of galena, sphalerite and chalcopyrite. Most of the gold and silver mineralization occurs as grey streaks of finely-divided sulfide minerals in brecciated quartz and other siliceous material. Lesser amounts are associated with calcite. Brecciation and silicification have occurred in multiple episodes. Chalcedonic banding is common and late-stage cr ........


Mining Methods

  • Cut & Fill
  • Longhole stoping


Summary:

The Summit Mine is an underground operation in an advanced stage of development. At full production, the mine is expected to produce 144,000 tons per year. The mine is operated utilizing mobile, rubber-tired, diesel equipment.

The development plan for the Summit Mine is based on a vertical, long-hole-stoping method. Some of the Resource Blocks may be better suited to a more selective mining method. The S-2 stope, which is smaller, narrower, and higher grade, has been developed for cutand-fill mining. The block will be mined from bottom to top with waste development rock being used for fill.

Some lenses of above-cutoff-grade mineralization with widths of 8 feet or less occur in close proximity to the minable resources. These likely will be mined with jack-leg drills or with single-boom jumbos designed for narrow widths


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnitsLOM (Projected)
Gold oz 46,708
Silver oz  ......  Subscription required
All production numbers are expressed as metal in concentrate.


Reserves at December 31, 2014:
Au Equiv. Cutoff - 0.140

CategoryTonnage CommodityGradeContained Metal
Indicated 212,800 tons Gold 0.117 oz/ton 25,702 oz
Indicated 212,800 tons Silver 6.373 oz/ton 1,403,583 oz
Inferred 627,209 tons Gold 0.114 oz/ton 73,742 oz
Inferred 627,209 tons Silver 7.884 oz/ton 5,117,787 oz



Proposed Heavy Mobile Equipment as of December 31, 2014:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Nov 10, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Preliminary Economic Assessment 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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