Libertad Gold Mine Nicaragua

The Libertad Gold District covers an area of ​​approximately 150 km2 in the central province of Nicaragua. La Libertad is owned 100% by B2Gold Corporation after Central Sun Mining Incorporated acquired on 26 March 2009 

The La Libertad deposits are as low sulphidation gold systems consisting of several economic vein structures found in a belt of Oligocene age of tertiary volcanic rocks to Miocene. Andesite flows and pyroclastics hosting a series of generally east-west trending epithermal quartz veins, breccias and quartz stockwork. Several Little felsic intrusives similar tertiary to mafic along the northeast spread to southwest structural trends.

Exploration La Libertad mine In 2015

Drilling has been ongoing in Los Angeles for running resource from open pit mine, Jabali East and Mojon for underground resources and many new goals, some of which remain to be tested over the next year. The focus of the drilling to increase confidence in near mine resources and simultaneously test Large, new exploration vein structures. 

Past Exploration In La Libertad mine

Eploration in 2012 in La Libertad mine area focuses on the Jabali infill program and drilling mine-related targets. The holes extend over an area of ​​approximately 300 m along Slam and up to 150 meters depth. 

The 2013 exploration campaign in La Libertad Mine Mine largely focused on drill testing of potential underground targets below the Mojon open pit, Jabali antenna and the Santa Maria mining.

In Mojon, a total of 13 holes were drilled on three underground areas beneath the current resource pit for 3,422 meters, and these will be pursued during 2014 definition programs.

At Jabali antenna was drilled, a similar program initiated for 3,104 meters with a total of 10 holes . The goal of this program was the downward finish extension of the main antenna where drilling historical and underground exploitation potential indicated for a Nice gold grades. 

The highlights of this drilling program are holes JB13-418 with 103.8 g / t gold over 1.5 meters true width, JB13-418 with 10.67 g / t gold over 3.1 meters true width only 7 m deep and JB13- 410 with 5.72 g / t gold over 5.89 meters width.

The 2014 exploration program included on La Libertad Mine resource at Mojon drilling and exploration continues on a number of regional destinations.

The focus of the exploration drilling was mainly towards brownfields drilling and evaluation of regional targets for the search opencast feed to the mill 

A total of 58 diamond drill holes were completed for 8250 meters in 4 destinations. These included the Mojon structure in which 32 holes were in an area below the pit design.

And geotechnical characteristics of the vein to test the extraction to investigate remaining material by underground methods. Other targets drill tested are the Los Angeles, Calvario and Mestiza vein structures

Read Also 

- Masbate Mining Philippines
- Mining Operation Otjikoto By B2Gold Corp 

Gold-Silver Project Hasbrouck In Nevada

The Hasbrouck gold-silver project is located in the northern part of Esmeralda County, near the town of Tonopah, Nevada, USA. The project is 75% owned by West Kirkland Mining (ERM) and 25% of Clover Nevada, a wholly owned subsidiary of Waterton Precious Metals Fund II Cayman.

The project is proposed to be developed in two phases. Phase I involves the development of the Three Hills gold deposit that is to be expected a production period of two years. Phase II is the development of Hasbrouck gold-silver deposit include, are likely to have six years. 

The pre-feasibility study (PFS) for the gold and silver project in Nevada was completed in June 2015 and the final approval from the government for the construction of the Three Hills Mine from April 2016. The Perform on the approval of Phase II under environmental assessment began in May 2015, the initial cost to the Three Hills mine is expected in production, is estimated to be $ 54.3 million, while Hasbrouck is funded from the production in Three Hills mine 

Hasbrouck Gold-Silver Project Reserves And Production

From June 2015, the Three Hills mine is proven to keep estimated combined and probable reserves of 9.65 million tonnes (Mt) grading 0.018 oz Au / t containing 175,000 ounces of gold.

The Hasbrouck Mine is estimated that proven and probable reserves of combined 35.671Mt grading 0.017 oz Au / t and 0.297 oz Ag / t, with 588,000 ounces of gold and 10.56 million ounces (Moz) of silver.

The hold annual production capacity of the project is estimated at an average of 71,000 ounces of gold. The project is expected to produce 138,000 ounces of gold at the stage in Phase II I and 429,000 ounces of gold, while silver production is estimated in the phase II to 194,000 ounces per year. 

Geology And Mineralization

Includes  , the two deposits are oxidized, low sulfidation, epithermal vein systems with host rocks tuffs and sediments of Siebert formation with limited mineralization within the underlying fraction Tuff. Gold and silver mineralization is either on the surface or near the surface, above the water level, and is open at depth and to a limited extent in the Northwest and East. 

Mining And Processing Of Gold And Silver Project In Nevada 

The Three Hills deposit is proposed to be mined as a run-of-mine open pit heap leach conventional open pit, truck and- shovel to integrate operations, while the deposit Hasbrouck be mined as an open pit heap leach ore crushed. The former is to integrate a 15,000t / d heap leach pad, while the latter incorporate a 17,500t / d leach pad.

The ore from two Phase II secondary cones with a primary jaw crusher, crushed crusher, and a tertiary high-pressure grinding roll (HPGR). The comminuted product is transported in a kneading machine with cement and to the leach pad. 

The leaching gold and silver from the Hasbrouck deposit and the gold from the Three Hills deposit at their respective locations with dilute cyanide solution that pass on through carbon columns to extract a precious metals.

The loaded carbon is then in adsorption-desorption-recovery (ADR) plant that are in the Three Hills . The loaded carbon from the Hasbrouck mine will be transported by trucks to the ADR facility. 

Infrastructure For West Kirkland Mining Flagship Project

The water required for the project is proposed to either be purchased from the Tonopah Public Utilities “(TPU) wellfield in Ralston Valley via an underground pipeline or installed next to each deposit wells.
“the two deposits are oxidized, low sulfidation, epithermal vein systems tuffs with host rocks comprising the sediments and Siebert lineup. “

The current for phase I of liquefied natural gas (LNG) -based generator are supplied, while the performance for the next phase of NV Energy supplied regional power distribution company, via a transmission line. A substation is on Hasbrouck location be built and both sides are a diesel-fired generator integrated to serve as back-up.

infrastructure for phase I, a laboratory will include a reagent storage building, a process Store and a warehouse, and serve three trailers as offices, will be relocated to Hasbrouck location in the next phase.

Important infrastructure at Hasbrouck site is building inclusion include administrative offices, a warehouse, a test laboratory and accommodations.

History of Gold Mining in the US

Gold   mining  consist of a number of processes and techniques, employed to extract raw  gold  from earth. These  gold  extraction techniques include  gold  panning, metal detecting, sluicing, dredging etc.

This metal is an expensive element; thus, individuals and nations have always been interested in  gold  extraction, mainly to gain economic benefits. In the United States of America, a major rush of  gold   mining  took place with the discovery of  gold  at the Reed farm in North Carolina, in 1799. Thirty years latter, this metal was discovered at the southern Appalachians in Georgia, which was followed by the California  Gold  Rush in 1848-52 in the Sierra Nevada, as a result of which a lot of people started to settle down in California. This was only the beginning of the history of this metal discovery and mining in America. Later on, many states in America, like Alaska, Alabama, Texas, Virginia and many more, were found to be blessed with reservoirs of this metal.

El Chanate Gold Mine Mexico

AuRico Gold’s El Chanate Mine located 37 km northeast of Caborca ​​in Sonora, Mexico. The mine consists of an open pit mine, crusher, heap leach pads, and mineral processing plant, and located on 3665 hectares includes within 19 mineral concessions. Since the acquisition of El Chanate in April 2011, has made a very solid performance in mining.

The Mining Process At Copper Mountain Mine ( Video )

Mining Operation In Copper Mountain Mine

Copper Mountain is an open pit porphyry (Alkalic)  copper mine in Canada .  Production target in  2014 The Mining Process at Copper Mountain Mine is 80 million pounds to 90 million pounds of copper as the main product, plus gold and silver as an additional product. The mining property and associated permits are under Similco Mines, a wholly owned subsidiary of Copper Mountain Mining Corporation (TSX:CUM) mining company based in Canada. Company focused on adding value through successful exploration, project development, efficient operations, and opportunistic acquisitions. Copper Mountain Mine owned by Copper Mountain Mining Corporation with 75% and 25% from Mitsubishi Materials Corporation

Young Davidson Mine In Ontario USA

Young Davidson  mining operation

Young Davidson mine is one of mining operation from AuRico Gold and among Canada’s largest underground gold mines. The 100%-owned Young-Davidson gold mine in northern Ontario is expected to produce 200,000 ounces per year by 2015. AuRico Gold has projects in Canada, Mexico and Australia and five operating properties including the Ocampo mine in Chihuahua State, the El Chanate mine in Sonora State, the El Cubo mine in Guanajuato State, as well as the Fosterville and Stawell gold mines in Victoria, Australia.

Gold In Nevada

Nevada region in the United States is a major industry in the world gold mining, and Gold In Nevada is also one of the world's largest gold resource. Nevada is a part region Southwestern of the United States and the majority of its territory consists of desert semiarid, much of it located within the Great Basin. A number of major mining companies, such as Barrick Gold Corporation , Newmont Mining, Goldcorp, operate gold mines in Nevada.

Gold Prospecting In Nevada was discovered in the 1870s at the vicinity of Carlin in Eureka County with production small, and in 1907 Placer deposits were discovered and the number is still small.  Nevada is well known for its hard rock gold mine production. However, Nevada ranks 6th among the 50 states in placer gold production, with historic gold production of roughly 1.7 million ounces.

Gold In Connecticut United States

Connecticut has a very rich history as a mining state, and Gold In Connecticut has a small amount of prospecting placer gold like many other New England states. Connecticut is the southernmost state in the region of the United States, bordered on the south by Long Island Sound, on the west by New York, on the north by Massachusetts, and on the east by Rhode Island

Just about any river or stream in the state of Connecticut does have some gold bearing gravel and refined gold from Alluvial placers,  those formed in river or stream sediments, because gold is heavier than any of the other materials that are found in the stream it will migrate down through the gravel to either a layer of clay or bedrock. Typical locations for alluvial gold placer deposits are on the inside bends of rivers and creeks so it is rather rare to find much Gold in the middle of the stream.

Gold In Alabama

State in the Alabama has produced a large amount of gold, after the discovery of gold in Georgia, the prospectors began to develop a search in the area of Alabama, and at the end of the 1830s Gold In Alabama was first discovered in the region Chilton County.  The first mining occurred at Blue and Chestnut Creeks.

From 1830 until about 1990 Alabama has produced almost 80,000 ounces of gold, And gold in Alabama has been found throughout Talladega, Tallapoosa, Chambers, Coosa, Clay, Chilton, Elmore, Cleburne, and Randolph Counties.

Alamo Dorado mine

Alamo Dorado mine in the Sierra Madre Mexico

Alamo Dorado mine is mining production for gold and silver, this mining method with open pit mine. Alamo Dorado mine in the Sierra Madre mountain range in Sonora, approximately 40 kilometers southeast of the town of Alamos, in the Sierra Madre Occidental and approximately 320 km from the state capital of Hermosillo in the Mexican state. 

Alamo Dorado mine is owned by Pan American Silver Corp and acquired  Alamo Dorado project in February 2003, and upon completion of the acquisition of Minera Corner Bay. On April 1, 2007 the Alamo Dorado mine began commercial production, after the construction of the mine and the mine has since become the company’s largest silver- producing mine.

Goldstrike Mine Nevada

The Goldstrike mine property complex is located on the Carlin Trend

Goldstrike mine is the largest gold mining in North America and a most prolific gold mining district in the Western Hemisphere. The Goldstrike mine property complex is located on the Carlin Trend in nor th-central Nevada, about 35 miles northwest of St. George and  about 60 kilometers northwest of Elko, Nevada, USA

The Goldstrike mine complex owned and operated by the world's largest gold mining company, Barrick Goldstrike Mines Inc. The Goldstrike operation includes the Betze-Post the largest open pit gold mine and the Meikle and Rodeo underground gold mine which are located just north of the Betze-Post pit, along the same mineralized trend, and Goldstrike mine adjoins Newmont Mining's Carlin mine complex

Process Of Gold Mining In Eagle River Mine

Eagle River mill exterior

The Eagle River mine complex is located near the north shore of Lake Superior 50 kilometres west of Wawa in Ontario Canada, the Eagle River complex includes the underground Eagle River mine, the open-pit Mishi mine, and the Eagle River mill.

In 1994 the Eagle River property was purchased by River Gold Mines Ltd to consolidate ownership of the Eagle River property. On February 1, 2006, River Gold Mines Ltd. merged with Wesdome Gold Mines Inc, to create Wesdome Gold Mines Ltd. (WDO-TSX).

Mineral Ore Processing In Red Lake Mine

Goldcorp (TSX: G; NYSE: GG) has been so growth-oriented over the past decade. In 2015 Goldcorps. Inc focus mining exploration on the discovery of high grade HG Young at the Red Lake mine. And in the Campbell Complex red lake gold mining district is completed underground drilling has commenced and will continue throughout 2015. Exploration drilling will also continue to focus on expansion of the R zone, NXT zone and the High Grade Zone (HGZ) up-plunge and at depth.

The Red Lake gold mine in the town of Red Lake in the province’s northwest is the world’s richest gold mine and is mined at the rate of 450 tonnes per day with an average grade of over 45 grams per tonne (1.3 ounces per tonne).

MINING OPERATIONS IN RED LAKE MINE

High Grade Zone At Red Lake mining

Gold ore in Red lake mines

The Red Lake Mining is one of the largest gold mines in Canada and largest gold mines in the world. Located in the Red Lake Mining Division within the District of Kenora, northwestern Ontario this mine cover approximately 2335 hectares, the mine is comprised of the Red Lake Complex and the Campbell Complex one of the world’s most prolific gold districts and the mine has estimated reserves of 3.23 million oz of gold

Red Lake Mining is owned and operated by Goldcorp Inc, operations are situated in the eastern part of the Red Lake Greenstone Belt in the Birch-Uchi Lake Subprovince of the Superior Province, within the core of the Canadian Shield and In 2014 Red Lake mine yielding 414,400 ounces. Gold rush in Red lake was first began in  1926, resulted in the discovery and development of several reasonably successful, former producing mining operations (i.e. >10 years production, >200,000 oz produced)

Process Of Mining Gold Fields In Cerro Corona Mine

The Cerro Corona Mine in the highest part of the western Cordillera of the Andes Mountains in northern Peru, two kilometers north-west of the village of Hualgayoc in the Department of Cajamarca

Cerro Corona mine cover an area of 4,379.3 hectares, while the surface rights cover 1,244 hectares. The Cerro Corona Mine is mining methods open-pit situated in the highest part of the western Cordillera of the Andes Mountains in northern Peru, two kilometers north-west of the village of Hualgayoc in the Department of Cajamarca. And this gold mine owned  by Gold Fields La Cima S.A. (GFLC) a wholly owned subsidiary of Gold Fields Limited (GFL) which holds 99.53% of the economic interest, from the original 80% to 98.6% in 2012 and in 2013 to 99.53%.

Earlier in the year 2003, Gold Fields, through a subsidiary, signed a definitive agreement with Sociedad Minera Corona S.A. for the purchase of the Cerro Corona deposit and adjoining mining concessions.

The environmental impact assessment in Cerro Corona mine approved on 2 December 2005, and in May 2006 began construction at the mine Cerro Corona.  Building of the Las Gordas tailings dam and quarrying for the relevant construction material commenced in 2007.

The mine production in Cerro Corona started  in September 2008, when the process plant started to operate. The Project Cerro Corona mine involves the production of gold and copper and  It is estimated that the current Mineral Reserve will be depleted in 2023

MINERAL DEPOSIT IN CERRO CORONA MINE PERU

Video How To Process Gold Ore In Nevada Gold Mines

How to process gold ore in the mining ? This is the  Video How To Process Gold Ore In Nevada Gold Mines

Gold mining is the gold mining process or gold ores from the ground. There are several techniques and process of gold which may be extracted from the underground. Gold mining in Nevada, a state of the United States, is a major industry, and one of the largest sources of gold in the world 

Until recently, gold exploration and gold mining production in Nevada has been focused on low grade surface deposits mined as open pits. As they probed deeper, they discovered even richer gold deposits. Development of these higher grade gold deposits as underground mines and the probability of discovering similar high grade deposits below Nevada's scarcely explored vast overburden has added new excitement to the state's gold potential.

Gold Mining in Nevada has a vast assortment of rocks and minerals. Igneous rocks include those from gabbro, diorite, and granite intrusions, and basalt, andesite, and rhyolite flows, breccias, and tuffs. Sedimentary rocks include conglomerate, sandstone, siltstone, shale, argillite, limestone, and dolomite. Metamorphic rocks include gneiss, schist, phyllite, slate, marble, hornfels, and skarn and various other types of metaigneous and metasedimentary rocks. Many types of minerals, both common and obscure, are also present.

Mining Operations And Gold Processing In Cortez Mine Nevada

The Cortez gold mine is located 100 kilometers southwest of Elko, Nevada in Lander County. The Cortez is found on the southern portion of the Battle Mountain-Eureka Trend in north central Nevada. Cortez Gold Mine is a large gold mining and processing facility in Lander and Eureka County, Nevada, United States, located approximately 75 miles (120 km) southwest of Elko. 

Cortez gold mines in Nevada is owned and operated by Barrick Gold and comprises the Pipeline and South Pipeline deposits and the Cortez Hills deposit.The Cortez Pipeline property is 11 kilometers northwest and the Cortez Pediment property (which includes the Cortez Hills deposit) is 4 kilometers southeast of the original Cortez milling complex. The Pipeline and South Pipeline deposits are mined by conventional open-pit methods.  

The Cortez property covers approximately 2,800 square kilometers on one of the world’s most highly prospective mineral trends. Pipeline and South Pipeline are open pit mines, while Cortez Hills is an underground and open pit mining operation. Under continuous operation, Cortez has been open longer than any gold mine in the state of Nevada. It is Barrick's and Nevada's largest gold producer.

Mining Operations Cortez Gold Mines In Nevada United States of America

The Pipeline and South Pipeline deposits are currently being mined using traditional open pit mining techniques, while the Cortez Hills deposit be mined out using both open pit and underground mining techniques.

Process Of Gold Mining Yanacocha Peru The Largest Gold Mine In South America

     

Yanacocha is the largest gold mine in South America, Yanacocha gold mine located in the province and the department of Cajamarca, Some 45km from Cajamarca in northern Peru, at an altitude of 4,700m, The sheer scale of the Yanacocha gold mine in Cajamarca, Peru, is staggering. It is the largest gold mine in Latin America, and the second largest in the world, covering 535 square miles.

Minera Yanacocha operates a complex of five gold mines and two processing facilities with development activities in four primary basins. Not only was this the first significant foreign investment in Peruvian mining for 20 years, but the project was undertaken in an area where guerillas were active, so the operation had to be heavily protected without antagonising local residents. The operation is a joint venture between Newmont (51.35%), Minas Buenaventura (43.65%) and the International Finance Corporation (5%)

The Yanacocha gold district is a 10x4km zone of altered rocks within a belt of tertiary volcanics that extends the whole length of Peru.

In the Yanacocha district, the volcanic pile has been subdivided into three groups:

Mining Methods And Gold Processing Musselwhite Mines

   

      Mining methods and gold processing musselwhite mines initially operated both open-pit and underground mines, open-pit production having been designed to ensure mill feed at a rate of 3,300t/d for about five years following mill commissioning. Most of the mine’s ore is now sourced from underground. And gold processing from musselwhite mines processing includes crushing, grinding, leaching by cyanidation, carbon in pulp recovery and electrowinning, to achieve an overall recovery of approximately 96%.

      The stratigraphy in the Musselwhite mine vicinity is dominated by mafic volcanics, chemical sediments and felsic volcanics. External into the supracrustal sequences are a series of undifferentiated gneisses and granitoids. All mineral lithologies within the immediate mine area have been metamorphosed at mid to upper amphibolite facies. Mineralization is predominantly hosted within meta-chemical sediments (banded iron formations) and in particular within garnet-magnetite-grunerite facies meta-banded iron formations (locally termed the Northern Iron Formation). The location of mineralization is controlled by the intersection of shear zones and folded meta-banded iron formations. These geological controls result in mineralized shoots, which plunge at approximately 15 degrees to grid north, have a down dip extent of up to 150 metres, down plunge continuation in excess of 1.5 kilometres, and across-lithology width of up to 10 metres. Mineralized zones are characterized by abundant pyrrhotite, quartz flooding and, rarely, visible gold.

Mining Methods In  Musselwhite Mines