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Fifty years ago on May 4, , Newmont poured our first gold bar from the Carlin Mine in Nevada, marking the beginning of what has become one of the largest and most productive gold mining districts in the world. Newmont Carlin Trend operations have since generated millions of ounces of gold, created thousands of jobs and helped the. The Newmont Carlin Mill is near Carlin, Nevada. Historically the site has been part of the Maggie Creek Mining District. The site was first discovered in The Newmont Carlin Mill is a processing plant. Initial production took place in The Great Basin of the Intermontane Plateaus characterize the geomorphology of the surrounding area. Newmont Gold Mine in Carlin, Nevada. Amateur video of Newmont mine in Nevada. Newmont has been pouring gold in Nevada for nearly 50 years along a mile stretch of highway in the north section of the state. Our Nevada properties operate as an integrated unit, and together, they boast the widest variety of processing methods of any gold mining. Newmont offers university students and recent graduates opportunities to gain real-world experience with a global leader in responsible mining. Learn More. Stay Informed about Newmont. Receive updates directly to your inbox on financial news, press releases, upcoming events and presentations, performance reports, blog posts and more.
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The job was originally a three-month development with a small amount of long-hole open stoping. We finished our first tour at this great mine eight years later when Newmont crews that were displaced from Deep Post at the end of took over. During our first tour, we mined 2,, tons of ore and 52, feet of drift. We also placed 1,, tons of backfill. After being away for almost two years, we were asked to come back to establish a new portal and access into Chukar to allow mining to resume.
Pit sequencing had interrupted production from the mine. We established a new portal from new location in the pit and connected to existing workings behind the pit highwall. We established completely new surface infrastructure that has remained unaffected by pit mining. Chukar is a safe, high productivity mine with ore production averaging 1, tons per day.
The main mining method is transverse long-hole open stoping with a lot of remote mucking. Primary stopes are filled with cemented rock fill. Secondary or tertiary stopes may be filled with gob.
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Carbonate-rich Fluorapatite. Silver-bearing Galena. Dallas Mineral Collecting Symposium – August – Online event and fundraising auction – CLICK HERE August – Online event and fundraising auction CLICK HERE to learn more. About Support Us Photos Discussions Search Learn More. Home Page About Mindat The Mindat Manual History of Mindat Copyright Status Who We Are Contact Us Advertise on Mindat.
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Nevada Gold Mines, a joint venture between Barrick Claimed to be the single largest gold-producing complex in the world, the Nevada Gold Mines includes mining operations at Carlin, Phoenix, Twin Creeks, Lone Tree, and Long Canyon. The Phoenix gold mine in Nevada produced 15 million pounds of copper in Established in July , Nevada Gold Mines is operated by Barrick.
The Nevada region produced ,oz of gold and 35 million pounds of copper in , prior to the formation of NGM. Newmont Mining Corp started mining gold at Carlin, Nevada, US, in and thereafter built up a strong land position in the state. In early , Newmont acquired Battle Mountain Gold Co. Mining started with open pits, some of which have been extended underground since Processing is by a number of methods, according to ore type.
In , the company operated 13 open pits, four underground mines and 14 active processing facilities in Nevada. Most, including Leeville where development ore production started in Q3 , totalling 16,oz by the year-end , are located on the Carlin Trend west of Elko, exploiting the unique mineralisation identified by Newmont in They are usually structurally controlled.
Mineralisation may be predominantly oxides, sulphides, refractory or carbonaceous sulphides and ore type determines the treatment route.
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Carlin-type Sediment-hosted Hydrothermal Stratabound SMS. The mineral deposits along the Carlin Trend form a suite of deposits known as Carlin-type. Carlin deposits comprise stratabound disseminated gold mineralization hosted by Silurian-Devonian carbonate rocks that have been metamorphosed to varying extents. The deposits are hydrothermal in origin and are usually structurally controlled.
The carbonate host rocks are part of an autochthonous miogeoclinal carbonate sequence exposed as tectonic windows beneath the Roberts Mountains allochthon. The allochthonous rocks are a sequence of lower Paleozoic dominantly siliciclastic eugeoclinal rocks that were displaced eastward along the Roberts Mountains Thrust over younger units during the Upper Paleozoic Antler Orogeny. The Carlin Trend is the largest concentration of gold deposits in North America.
NGM and other companies have discovered over 40 deposits along the 64 kilometre long, north—northwest-oriented Carlin Trend. Gold deposits are generally hosted in a variable stratigraphic package of Ordovician through Lower Mississippian rocks. The preferential host rocks are autochthonous carbonate assemblage rocks that are now preserved in uplifted tectonic windows. All Carlin Trend gold deposits that have been discovered to date are either within the Bootstrap, Lynn, Carlin, and Rain tectonic windows, or proximal to them.
Host rocks are most commonly thinly-bedded silty or argillaceous carbonaceous limestone or dolomite, commonly with carbonaceous shale. Although less mineralized, non-carbonate siliciclastic and rare metavolcanic rocks can locally host gold that reaches economic grades.
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Carlin-type Hydrothermal Stratabound SMS. The mineral deposits along the Carlin Trend form a suite of deposits known as Carlin-type. Carlin deposits comprise stratabound disseminated gold mineralization hosted by Silurian-Devonian carbonate rocks that have been metamorphosed to varying extents. The deposits are hydrothermal in origin and are usually structurally controlled.
The Devonian Popovich Formation consists of sub-units Upper Mud DpUM , Soft Sediment Deformation DpSSD , Planar DpPL , and Wispy DpWS. A series of igneous dikes intrude the sediments and have been identified as lamprophyres, biotite-feldspar porphyries, and granodiorite. These units are uncomformably overlain by the upper plate Ordovician Vinini Formation. Mineralization, primarily hosted in the Devonian Popovich Formation Dp , is bound on the west by the Castle Reef Fault CRF and restricted to the east by the Eastern Dike Swarm EDS.
This structurally controlled system follows near vertical structural fabrics and crosses stratigraphic boundaries. The highest gold values are located adjacent to, or within, the steeply dipping Big Green Dike BGD , Castle Reef Intrusive CRI , and Eastern Dike Swarm EDS. These intrusive filled structures appear to be the main conduits for Exodus gold mineralization.
Sediment hosted mineralization appears to have no correlation with a specific alteration type. The primary mining method at Exodus and Northwest Exodus is long-hole open stoping with some drift and fill mining planned in areas with less vertical extent. Northwest Exodus is mined with longhole open stoping using a primary and secondary pass sequence similar to Exodus.
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In , Newmont Mining TSX: NGT made a massive gold discovery near the town of Carlin, Nevada, forever changing the fortunes of the State of Nevada. The discovery was made in a new kind of structure that geologists had little knowledge of. This enabled extraction from open pits, with the ore treated through heap-leaching, cyanidation and other traditional means of milling ore. Some of the larger mines have also extended their operations underground.
While waiting for favourable weather to cross the Sierra Nevada mountains, the group prospected the area and made a number of small scale discoveries, which kept them in the area for the next few years. In , the Comstock Lode became one of the most significant silver discoveries in US history. It also effectively ended the California Gold Rush, as prospectors turned their attention to Nevada in search of the next motherlode discovery.
The area around Virginia City became a mining camp, and between and , the Comstock produced over million dollars in gold and silver — and it is estimated that Comstock produced 8. The discovery of the Goldfield Mining District in and the Combination Lode in ushered in another rush, aided by the arrival of the railroad in The Newmont discovery at Carlin and the newfound awareness of Carlin-type deposits led to several other major discoveries in north-central Nevada.
Ironically, prospectors for many decades had ignored the small specks of gold found in the area, not understanding that they were finding Carlin-type gold. While the gold grades were fairly low, the deposits were massive and relatively inexpensive to mine in open pits. In , Nevada produced over 5.
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/03/26 · On July 1, , Barrick’s Goldstrike and Newmont’s Carlin operation were contributed to the Nevada Gold Mines joint venture and are now collectively referred to as Carlin. Barrick is the operator of the Nevada Gold Mines LLC joint venture and owns %, with Newmont owning the remaining % of the joint venture. Deposit sgwtest.deities: Gold. Owned and operated by the Newmont Gold Co. (Newmont Mining Corp.) P.O. Box , Carlin, Nevada (). MRDS database stated accuracy for this location is 10 meters. HISTORY: The first claims were staked in by A. Berning, who leased the property to Cuba Consolidated Mines Company. In , Cuba Consolidated shipped 60 tons of ore.
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