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Mexico
Rosario Mine

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 Location:
12 SW from Charcas, San Luis Potosí, Mexico

  Regional Office:
Rio Colorado 454 Ote. Piso 7 Interior A Col. del Valle
San Pedro Garza García
Nuevo León, Mexico
66220
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Silver
  • Gold
  • Lead
  • Zinc
Mining Method
  • Shrinkage stoping
  • Longhole stoping
Processing
  • Flotation
The Rosario Project currently includes the Rosario Mine and the Membrillo Prospect, and is located proximate to the Municipality of Charcas in the State of San Luis Potosi, Mexico, 184 kilometres north of the capital city of San Luis Potosi.

The mineral property that forms the Rosario Mine comprises the Rey David and San Rafael mining concessions.
Latest NewsSantacruz Silver Reports 2019 Annual Production of 2,829,459 Silver Equivalent Ounces     January 28, 2020


Owners

Source: p. 10, 11, 25
CompanyInterestOwnership
Santacruz Silver Mining Ltd. 100 % Indirect
Impulsora Minera Santacruz S.A. de C.V. 100 % Direct

Deposit Type

  • Vein / narrow vein
  • Mesothermal


Summary:

Mineralization is hosted in two veins with a general strike of N60W, dipping between 45 to 60 degrees southwest. The host rock of the veins is comprised of the Zacatecas formation, a mid to late Triassic turbidite sequence, consisting of beds of dark grey, green and grayish-green shale, sandstone, conglomerate and siltstone. The veins extend over a length of 2.5 to 3.0 kilometers, and to a depth of at least 150 to 200 meters, as determined from available drilling data (Rodriguez et al., 1987). Each of the Rosario I and Rosario II veins vary in width from 0.4 to 2.5 meters. Mineralization appears to have occurred in three stages, with the third stage precipitating the silver bearing minerals. This deposit has been described as a mesothermal vein system based on temperature (195 to 338°C), although mineralization is typical of other deposits in Mexico which are described as epithermal. Abundant sulfides, sphalerite pyrite and galena with subordinate amounts of chalcopyrite, arsenopyrite and hematite, can be found within the veins. Additional minerals identified through electron microscopy include freibergite, tetrahedrite, boulangerite, pyrargyrite, argentite, stromeyerite, and diaphorite (Rodriguez et al., 1987).

The Rosario Veins at the Rosario Project are vein filled faults defined as mesothermal within epithermal limits.

Based on fluid inclusion work in quartz and calcite, Palacios and Arriaga (1994) postulated that the mineralization in the Rosario veins occurred in three stages, the most important of which was the latest stage in which argentiferous minerals were deposited. The temperatures during deposit formation were determined using fluid inclusions in quartz and calcite. The third stage occurred within epithermal temperature ranges between 195 to 262 degrees Celsius with salinity of 12% to 16%. Palacios and Arriaga state that fluid inclusion temperatures indicate that this is a mesothermal type deposit based on temperatures defined by Lindgren (1933) although based on the presence of adularia and silver sulfosalts, the Rosario veins more closely resemble an epithermal deposit.


Mining Methods

  • Shrinkage stoping
  • Longhole stoping


Summary:

The Rosario Project currently includes the Rosario Mine and the Membrillo Prospect [2019 MDA, p. 12]. The Company suspended operations at the Cinco Estrellas property in late 2017. [2018 MDA, p. 10]

At the Membrillo Prospect the Company completed access to Levels 1, 2 and 3 on the main Membrillo vein as well as on the San Rafael vein. [2018 MDA, p. 11]

Current primary source of mill feed is the Membrillo Prospect, a mesothermal, low sulphidation polymetallic vein system of Ag, Au, Zn and Pb that carries to surface.

Management remains focussed on increasing tonnes of mineralized material processed at the milling facility with the objective of reaching 400 tpd before the end of Q3 2020 with improved head grades. Additional mining equipment (two sccoptrams) was procured for the project in the second quarter of 2020 which should result in an increase of production towards the target amount. [03/31/2020 MDA-Q1, p.11]


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

The proposed plant will process up to 500 tonnes/day of material to produce two concentrates, a lead concentrate and a zinc concentrate. [2015 AIF, p. 51]

Production at the Rosario Project, all from the Membrillo Prospect, improved on a year-over-year basis with the silver head grade increasing by 51%, tonnes milled increasing by 24% and silver equivalent ounce production increasing by 53%

Management remains focussed on increasing tonnes of mineralized material processed at the milling facility with the objective of reaching 400 tpd before the end of Q3 2020 with improved head grades.

Recoveries & Grades:

CommodityParameter201920182017201620152014
Silver Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Head Grade, g/t 654352155193.8176
Gold Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Gold Head Grade, g/t 0.270.290.520.250.170.3
Lead Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead Head Grade, % 0.40.240.250.841.080.96
Zinc Recovery Rate, %  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc Head Grade, % 2.092.022.173.422.652.34
Subscription required - Subscription is required.

Production:

CommodityUnits201920182017201620152014
Silver oz  ......  Subscription required  ......  Subscription required112,663425,838471,893468,751
Gold oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Lead t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Zinc t  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver Equivalent oz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate.
Subscription required - Subscription is required.

Operational Metrics:

Metrics201920182017201620152014
Daily milling capacity  ......  Subscription required  ......  Subscription required  ......  Subscription required
Tonnes processed  ......  Subscription required  ......  Subscription required  ......  Subscription required91,852 t79,249 t91,835 t
Subscription required - Subscription is required.

Reserves at December 1, 2012:
The Mineral Resources as at 31th December 2019 at Rosario mine are unchanged from Dec 1, 2012

CategoryTonnage CommodityGradeContained Metal
Measured 270 kt Silver 210.1 g/t 1,825 koz
Measured 270 kt Gold 0.94 g/t 8,162 oz
Measured 270 kt Lead 1.17 % 6,952 k lbs
Measured 270 kt Zinc 3.69 % 21,997 k lbs
Measured 270 kt Silver Equivalent 381 g/t 3,306 koz
Indicated 711 kt Silver 162.7 g/t 3,718 koz
Indicated 711 kt Gold 0.882 g/t 20,159 oz
Indicated 711 kt Lead 1.18 % 18,430 k lbs
Indicated 711 kt Zinc 2.6 % 40,690 k lbs
Indicated 711 kt Silver Equivalent 303 g/t 6,931 koz
Measured & Indicated 981 kt Silver 175.7 g/t 5,543 koz
Measured & Indicated 981 kt Gold 0.898 g/t 28,320 oz
Measured & Indicated 981 kt Lead 1.17 % 25,383 k lbs
Measured & Indicated 981 kt Zinc 2.9 % 62,687 k lbs
Measured & Indicated 981 kt Silver Equivalent 325 g/t 10,236 koz
Inferred 386 kt Silver 90.6 g/t 1,126 koz
Inferred 386 kt Gold 0.81 g/t 10,053 oz
Inferred 386 kt Lead 0.73 % 6,206 k lbs
Inferred 386 kt Zinc 2.1 % 17,874 k lbs
Inferred 386 kt Silver Equivalent 203 g/t 2,523 koz

Commodity Production Costs:

CommodityUnits201920182017201620152014
Cash costs (sold) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 21.8 / oz 12.2 / oz 12.7 / oz 19 / oz
All-in sustaining costs (sold) Silver Equivalent USD  ......  Subscription required  ......  Subscription required 26 / oz 15.4 / oz 16.3 / oz 25.8 / oz
Subscription required - Subscription is required.

Operating Costs:

Units201920182017201620152014
Total operating costs ($/t milled) USD 75.393.672.481.292.6113.46

Financials:

Units201920182017201620152014
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required 8.64   10.6  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -2.04  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -2.04   -2.02  
Pre-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required -2.04  
Subscription required - Subscription is required


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 20, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2018
................................... Subscription required 2018
Financial Review 2017
Management Discussion & Analysis 2017
Financial Review 2016
Management Discussion & Analysis 2016
Press Release 2016
Annual Information Form 2015
Annual Information Form 2015
Management Discussion & Analysis 2015
Technical Report 2012
Subscription required - Subscription is required.

News:

NewsDate
Santacruz Silver Reports 2019 Annual Production of 2,829,459 Silver Equivalent Ounces January 28, 2020
Santacruz Silver Reports 2018 Annual Production Results February 14, 2019

Subscription required - Subscription is required.

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