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United States
Round Top REE Project

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 Location:
15 km NW from Sierra Blanca, Texas, United States

  Project Contacts:
539 El Paso St.
Sierra Blanca
Texas, United States
79851
Phone  ...  Subscription required
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • REE
  • Dysprosium
  • Lithium
  • Hafnium
  • Zircon
  • Praseodymium
  • Neodymium
  • Terbium
  • Yttrium
  • Scandium
  • Niobium
  • Uranium
  • Tin
  • Aluminum
  • Iron
  • Magnesium
  • Manganese
  • Potassium
Mining Method
  • Truck & Shovel / Loader
Mine Life20 years (as of Jan 1, 2019)


Owners

Source: p. 13, 28
CompanyInterestOwnership
Texas Mineral Resources Corp. 20 % Indirect
USA Rare Earths LLC (operator) 80 % Indirect
The Round Top Project is owned by Texas Mineral Resources (TMRC), (formerly TRER), and is subject to a joint-venture and option agreement between USA Rare Earth LLC and TMRC, with USA Rare Earth LLC as the operating partner.

In November 2018, USA Rare Earth LLC entered into an option and development agreement with TMRC to acquire up to 80% interest in the Round Top project, subject to certain minimum expenditures, project milestones, and conditions.

Contractors

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Deposit Type

  • Porphyry
  • Magmatic


Summary:

The rhyolite itself comprises the REE mineralized body. Magmas with a peralkaline composition are known to have high concentrations of incompatible elements such as U, REE, Th, and Zr.

The rhyolite magma that developed Round Top Peak probably cooled too quickly to develop a coarse-grained texture or to develop zones with high REE concentrations. A quick cooling rate would cause a fine-grained texture of the rhyolite and even distribution of the REE minerals. The rhyolite magma was saturated in fluorine, which is reflected in the high percentage of fluorine accessory minerals that are distributed throughout the rhyolite mass. As the magma cooled, fluorine saturated fluids exsolved from the crystallizing magma. These fluorine rich fluids accumulated in interstices and vugs between the earlier crystallized minerals and deposited REE minerals and other accessory minerals in the interstices. The REE deposit at Round Top Peak can be classified as quartz saturated peralkaline (A-1) granite with a rhyolitic texture and a composition similar to certain pegmatites.

REE mineralization is hosted by the Round Top Peak laccolith. The rhyolite is fine grained with a microporphyritic texture. The porphyry phenocrysts consist of alkali-feldspar with albite cores, clear quartz grains, and minor brown to clear Li-mica. Within the quartz grains or crystals, inclusions along planes of crystallization have been observed. The groundmass is aphanitic and consists of quartz, fel ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Typical open pit mining methods will be used, ore will be transported from the pit to a crushing plant located adjacent to the leach pads. A haul road will be pioneered to the top of the mountain and mining will begin at the upper most benches and progress downward. As mining proceeds to lower benches, a haul road will remain in the high wall to allow access to catch berms and additional mining areas. The pit is designed with sufficient area to allow for two separate working benches or faces.

The very nature of how the mineralization sits above regional topography creates a mine with very little waste material or cover. As such there is no waste rock storage facility planned for this project. Any surface material overlying the mineralization within the pit area is expected to be unconsolidated colluvium which will be used as construction materials for leach pads and roads.

The rhyolite will be mined in 20 ft. benches, the recommended height for the class of loader selected. Two 12m3 wheel loaders will load 90 tonne haul trucks to reach a daily production rate of 20,000 tonnes. The general site layout, including pits, waste dumps, infrastructure, ponds, and heap leach pads.

The initial 20-year pit was designed based on the configuration of the rhyolite laccolith. The initial 20-year pit was designed to keep all the mining to the northwest portion of Round Top. It was decided to mine this area first due to the highest drilling density in this ar ........


Crushing and Grinding


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. Annual
Total Rare Earth Oxides Oxide t 2,313
Dysprosium Oxide t  ......  Subscription required
Lithium Carbonate t  ......  Subscription required
Praseodymium Oxide t  ......  Subscription required
Neodymium Oxide t  ......  Subscription required
Yttrium Oxide t  ......  Subscription required
Aluminum Sulphate t  ......  Subscription required
Iron Sulphate t  ......  Subscription required
Magnesium Sulphate t  ......  Subscription required
Manganese Sulphate t  ......  Subscription required
Potassium Sulphate t  ......  Subscription required

Operational Metrics:

Metrics
Daily ore mining rate 20,000 t *
Daily processing rate 20,000 t *
Annual ore mining rate 7,300 kt *
Annual processing rate 7.3 Mt *
Ore tonnes mined, LOM 146,000 kt *
Tonnes processed, LOM 146,000 kt *
* According to 2019 study.

Reserves at July 1, 2019:

CategoryTonnage CommodityGrade
Measured & Indicated 364,000 t Dysprosium 30.33 ppm
Measured & Indicated 364,000 t Lithium 458.33 ppm
Measured & Indicated 364,000 t Hafnium 79.36 ppm
Measured & Indicated 364,000 t Zircon 1104.09 ppm
Measured & Indicated 364,000 t Praseodymium 10.27 ppm
Measured & Indicated 364,000 t Neodymium 27.88 ppm
Measured & Indicated 364,000 t Terbium 3.46 ppm
Measured & Indicated 364,000 t Yttrium 213.97 ppm
Measured & Indicated 364,000 t Scandium 0.68 ppm
Measured & Indicated 364,000 t Niobium 164.58 ppm
Measured & Indicated 364,000 t Uranium (U3O8) 31.77 ppm
Measured & Indicated 364,000 t Tin 137.51 ppm
Measured & Indicated 364,000 t Aluminum 6.56 %
Measured & Indicated 364,000 t Iron 1.04 %
Measured & Indicated 364,000 t Magnesium 0.03 %
Measured & Indicated 364,000 t Manganese 471.28 ppm
Measured & Indicated 364,000 t Potassium 3.3 %
Inferred 735,000 t Dysprosium 29.61 ppm
Inferred 735,000 t Lithium 445.2 ppm
Inferred 735,000 t Hafnium 77.33 ppm
Inferred 735,000 t Zircon 1049.38 ppm
Inferred 735,000 t Praseodymium 9.97 ppm
Inferred 735,000 t Neodymium 27.55 ppm
Inferred 735,000 t Terbium 3.3 ppm
Inferred 735,000 t Yttrium 195.84 ppm
Inferred 735,000 t Scandium 0.71 ppm
Inferred 735,000 t Niobium 46.52 ppm
Inferred 735,000 t Uranium (U3O8) 8.38 ppm
Inferred 735,000 t Tin 134.94 ppm
Inferred 735,000 t Aluminum 6.52 %
Inferred 735,000 t Iron 0.82 %
Inferred 735,000 t Magnesium 0.01 %
Inferred 735,000 t Manganese 118.86 ppm
Inferred 735,000 t Potassium 3.21 %

Commodity Production Costs:

CommodityUnitsAverage
Assumed price Dysprosium USD  ......  Subscription required
Assumed price Terbium USD  ......  Subscription required
Assumed price Praseodymium USD  ......  Subscription required
Assumed price Neodymium USD  ......  Subscription required
Assumed price Yttrium USD  ......  Subscription required
Assumed price Hafnium USD  ......  Subscription required
Assumed price Potassium USD  ......  Subscription required
Assumed price Scandium USD  ......  Subscription required
Assumed price Iron USD  ......  Subscription required
Assumed price Lithium USD  ......  Subscription required
Assumed price Magnesium USD  ......  Subscription required
Assumed price Manganese USD  ......  Subscription required
Assumed price Zircon USD  ......  Subscription required
Assumed price Aluminum USD  ......  Subscription required
Assumed price Uranium (U3O8) USD  ......  Subscription required
* According to 2019 study / presentation.

Operating Costs:

Units2019
OP mining costs ($/t milled) USD 3.08 *  
Crushing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2019 study.
Subscription required - Subscription is required.

2019 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 1,247
G&A costs $M USD 274.3
Total OpEx $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Operating margin, %  ......  Subscription required
Operating margin (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of July 1, 2019:
HME TypeModelSizeQuantityLeased or
Contractor
Dozer ....................... 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 ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 1, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 1, 2019
....................... Subscription required ....................... Subscription required Subscription required Nov 4, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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