Mining Intelligence and News
United States

Pumpkin Hollow UG Mine

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Categories

Overview

Mine TypeUnderground
StatusTemporary Suspension
Commodities
  • Copper
  • Gold
  • Silver
  • Iron Ore
Mining Method
  • Longhole stoping
Backfill type ... Lock
Mine Life... Lock
SnapshotThe Pumpkin Hollow underground mine is a fully constructed copper mine with significant, recently constructed infrastructure.

Since June 10, 2024, Nevada Copper Corp. (the previous owner) has not continued operations at the Pumpkin Hollow UG mine due to the restructuring process.

Kinterra (current owner) will leverage its technical expertise and operational excellence to advance the multiple assets within the Pumpkin Hollow package.
Related AssetPumpkin Hollow OP Project

Owners

SourceSource
CompanyInterestOwnership
Kinterra Copper USA LLC 100 % Indirect
On October 9, 2024, Kinterra Capital Corp. announced that its affiliate, Southwest Critical Materials LLC, has successfully acquired the Pumpkin Hollow Copper Project from Nevada Copper, Inc.

Contractors

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Deposit type

  • Skarn
  • Breccia pipe / Stockwork
  • IOCG

Summary:

East Deposit
The East Deposit, located 7,000 ft east of the North Deposit, measures approximately 2,000 ft by 1,200 ft and consists of flat-lying to gently dipping, bedding-controlled, stacked skarn-IOCG mineralized zones within the limestone of the Mason Valley Formation at depths of 1,400 to 2,200 ft. The East Deposit is defined by drill holes spaced approximately 175 to 250 ft apart.

Higher grade copper occurs mainly in dolomitized limestones and skarn-chalcopyrite-magnetite-pyrite breccias immediately adjacent to diorite or diorite endoskarn. Much of the high magnetite rock that grounds the East Deposit is within diorite endoskarn. A good amount of continuity is evident in the East Deposit with mineralization possibly continuing and thickening to the west. The area between the East Deposit and the North Deposit still requires detailed exploration to accurately determine the lateral extent of each Deposit.

E2 Deposit
The E2 Deposit is a steeply northwest-dipping lens of high grade copper-magnetite skarn-IOCG breccia within the Mason Valley limestone, which lies on the hanging wall of an endoskarn sill. The lens has been explored along approximately 1,200 ft of strike length, is 40 to 120 ft thick, and is locally continuous for at least 1,600 ft down-dip.

The chalcopyrite-magnetite mineralization follows the marble front, similar to the East Deposit. A major east-trending rotational fault appears to exist between the two deposits and results in a significant variation in the deposit orientation. Analysis of the drill hole intersections suggests that the E2 Deposit may, in fact, be a series of steeply dipping, plunging shoots, as much as 400 ft wide and 3,000 ft long on dip. The main portion of the mineralization starts approximately 800 ft below the present surface and extends 2,400 ft below the surface.

Reserves

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Mining Methods

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Production

CommodityProductUnitsAvg. Annual (Projected)LOM (Projected)
Copper Payable metal M lbs 50671
Copper Metal in concentrate M lbs 699
Gold Payable metal koz 8109
Gold Metal in concentrate koz 120
Silver Payable metal koz 1502,100
Silver Metal in concentrate koz 2,333

Production Costs

Commodity production costs have not been reported.

Required Heavy Mobile Equipment

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Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 17, 2024
....................... Subscription required ....................... Subscription required Subscription required May 2, 2024
....................... Subscription required ....................... Subscription required Subscription required Jan 2, 2024

Aerial view:

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