grade control in vein type gold deposits

grade control in vein type gold deposits

Grade control geological mapping in underground gold vein ...

Grade control in underground gold vein operations: the. role of geological mapping and sampling, in Proceedings of the. ... The seven categories are: (1) vein-type deposits,

Grade control geological mapping in underground gold vein ...

Dec 13, 2017  The foundation of all grade control programmes should be that of geological understanding led by clear and accurate mapping and representative sampling to drive appropriate estimation strategies and mining. Gold veins show features relating to erratic grade distribution (nugget effect), and variable geometry and internal architecture.

Grade control geological mapping in underground gold vein ...

T1 - Grade control geological mapping in underground gold vein operations. AU - Dominy, S. C. AU - Platten, I. M. PY - 2012. Y1 - 2012. N2 - Grade control is a process of maximising value and reducing risk. It requires the delivery of tonnes at an optimum grade to

(PDF) Design of grade control sampling programs for ...

Grade control strategy is related to mining method and orebody type. Sampling protocols must be designed to suit the style of mineralisation in question. ... Gold, Veins, Grade control ...

Effective Domain Selection for Grade Control in Narrow ...

Aug 18, 2014  Effective domain selection for grade control in narrow vein gold deposits, in Proceedings Ninth International Mining Geology Conference 2014 , pp 191–196 (The Australasian Institute of Mining and Metallurgy: Melbourne). Full Article Download: (6614 kb) OneMine, Inc. [email protected] +1 303 948 4248 Fax ...

Epithermal Gold Deposits Geology for Investors

Jul 12, 2013  Epithermal gold deposits are among the richest gold deposits in the world with some bonanza grade ore shoots containing more than 1000 g/t gold, or in other words, a kilogram of gold for every tonne of rock mined. Unfortunately, the tonnage of ore in epithermal veins is typically small compared with other types of lower grade gold deposits. Gold mineralisation within epithermal veins

VEIN DEPOSITS - Earth Sci

A vein-type deposit is a fairly well defined zone of mineralization, usually inclined and discordant, which is typically narrow compared to its length and depth. Most vein deposits occur in fault or fissure openings or in shear zones within country rock. A vein deposit is sometimes referred to as a (metalliferous) lode deposit.

Grab sampling for underground gold J mine grade control

Grab sampling for underground gold mine grade control by S.C. Dominy*† Synopsis Geologists in some underground gold mines collect grab samples from broken ore piles or trucks as a method of grade control. It is often known as muck sampling. Generally, the goal of grab sampling is to try and reconcile the mined grade at the ore source to

Vein-type ore deposits: Introduction - ScienceDirect

Jul 01, 1993  Vein-type ore deposits: Introduction. In: S.J. Haynes (Editor), Vein-type Ore Deposits. Ore Geol. Rev., 8:205-211. A vein-type ore deposit is defined here, as: a deposit of ore filling a fissure, or fissures, in rock. This term is non-genetic and is non-restrictive with regard to orientation.

Using Portable XRF Analysis for Ore Grade Control in Mining

The foundation of all grade control programmes should be that of geological understanding led by clear and accurate mapping and representative sampling to drive appropriate estimation strategies and mining. Gold veins show features relating to erratic grade distribution (nugget effect), and variable geometry and internal architecture.

Grab sampling for underground gold J mine grade control

Grab sampling for underground gold mine grade control by S.C. Dominy*† Synopsis Geologists in some underground gold mines collect grab samples from broken ore piles or trucks as a method of grade control. It is often known as muck sampling. Generally, the goal of grab sampling is to try and reconcile the mined grade at the ore source to

GEOLOGY OF SEDIMENTARY ROCK-HOSTED GOLD

high-grade vein-like ores, and massive breccia-or stockwork-type (fig. 22). Peters (1996, 1997c) has suggested that shear folding of pre-existing regional folds was a major ore-control in the large Betze deposit in the Carlin trend and that some of the deformation was synchronous with ... Carlin-Type Gold Deposits in the Carlin Trend, Nevada A ...

Gold Deposit Classification: List of 10 Types of Gold Deposits

Apr 08, 2021  Gold/Auriferous Deposits can be classified into types for which here is a List of 10 Types of Gold Deposits:. Auriferous porphyry dykes, sills, and stocks; Auriferous pegmatites; coarse-grained granitic deposits + albitite.; Carbonatites and carbonatite-related deposits.; Auriferous skarn and gold skarn type deposit.; Gold/Silver and vise-versa veins, lodes, mineralized pipes and irregular ...

Gold Ore - an overview ScienceDirect Topics

Within individual deposits, the quartz–carbonate vein systems are sometimes more than 2 km in vertical extent. The most common alteration minerals associated with the gold are quartz, carbonate, white mica, chlorite, and pyrite; both gold and silver are enriched in the deposits, while the abundance of base metals is relatively low.

Vein (geology) - Wikipedia

In many gold mines exploited during the gold rushes of the 19th century, vein material alone was typically sought as ore material. In most of today's mines, ore material is primarily composed of the veins and some component of the wall rocks which surrounds the veins.. The difference between 19th-century and 21st-century mining techniques and the type of ore sought is based on the grade of ...

Argonaut Gold Drills High Grade Gold Veins Below the El ...

Argonaut Gold Drills High Grade Gold Veins Below the El Crestón Pit at its La Colorada Mine including 12.2 Metres at 98.9 g/t Gold and 30.3 g/t Silver and 21.3 Metres at 44.6 g/t Gold and 274.9 g ...

Argonaut Gold Drills High Grade Gold Veins Below the El ...

Apr 26, 2021  Argonaut Gold Inc. (TSX: AR) (the "Company", "Argonaut Gold" or "Argonaut") is pleased to announce it has discovered high grade gold veins below the El Crestón open pit at its La Colorada mine in Sonora, Mexico. The high grade intercepts include: Drill hole 20-LCRC-592 intersected 12.2 metres at 98.9 g/t Au and 30.3 g/t Ag, including 3.0 metres of 383.0 g/t Au and 113.5 g/t Ag Drill hole

Gold Quartz Veins - Mineral Deposit Profiles, B.C ...

The largest gold-quartz vein deposit in British Columbia is the Bralorne-Pioneer which produced in excess of 117 800 kilograms of Au from ore with an average grade of 9.3 g/t. ECONOMIC LIMITATIONS : These veins are usually less than 2m wide and therefore, only amenable to underground mining.

Gold in Quartz - ICMJ's Prospecting and Mining Journal

While gold deposits can be things besides quartz veins, gold is certainly found in the quartz of veins cutting through various types of rocks. Gold in quartz veins occurs as particles and scales scattered through the quartz, often filling cracks and openings in the vein material. The gold can be such small particles as to be invisible to the ...

Major Mines Projects - Mining Intelligence and News

Turbidite-hosted Meguma gold deposits are a sub-type of orogenic gold deposits. Orogenic gold deposits form near or soon after peak metamorphism in collisional metamorphic terranes of all ages. These deposits exhibit strong structural control in brittle faults and ductile shear zones as quartz-dominated stockworks, breccias, sheeted veins, vein ...

Low-Sulfide Quartz Gold Model - USGS

Low-Sulfide Quartz Gold Deposit Model By Lawrence J. Drew U.S. Geological Survey Reston, VA 20192 Deposits in this class have been widely described and given many names: • Mesothermal gold • Mother lode type • Homestake type • Low-sulfide quartz gold • Gold-only deposits • Quartz-carbonate lode gold

Gold - Unidragon – Mining

The EXPA-00084-V which was located in Pinagbirayan Malaki Tabas Labo, is influence by the NNW trending gold quartz vein system. The surface manifestations shows high silica-clay-gold-silver veining and alteration system relative to epithermal type of gold deposits.

Mining to Date of the San Albino Vein Yields 7,734 Ounces ...

Mining to Date of the San Albino Vein Yields 7,734 Ounces Gold at a Diluted Grade of 17.45 g/t Gold and Positively Reconciles to the MDA Resource Estimate

Radius Gold Options Silver and Gold Epithermal Vein System ...

Mar 16, 2021  Vancouver, Canada – TheNewswire – March 16, 2021 – Radius Gold Inc. (TSXV:RDU) is pleased to announce it has optioned the Maricela group of properties located in the State of Sonora, Mexico, 18km south of the giant Cananea copper mine. At Maricela, Radius’s geologists have mapped and sampled a epithermal silver gold mineralized vein system extending approximately 1.5km long

Low Sulphidation Epithermal Gold Deposits

Oct 21, 2020  The Pierina can be seen in the distance to the east. On the road the quartz carbonate veins look like this erosion resistant and just a few meters wide. The total size of the deposit is modest, but the excellent grades make up for this, with an average grade of 22 grams per tonne of gold

Deposit-scale structural controls on orogenic gold ...

Aug 13, 2019  The first attempts to propose a process model for the localisation of high-grade ore shoots in vein-style gold deposits date back to the early twentieth century (e.g. Hulin 1929).For example, in the case of gold-bearing reefs at Norseman,

Vein (geology) - Wikipedia

In many gold mines exploited during the gold rushes of the 19th century, vein material alone was typically sought as ore material. In most of today's mines, ore material is primarily composed of the veins and some component of the wall rocks which surrounds the veins.. The difference between 19th-century and 21st-century mining techniques and the type of ore sought is based on the grade

Alkalic-type epithermal gold deposit model; Chapter R in ...

Deposits occur as disseminations, breccia-fillings, and veins and may be spatially and genetically related to skarns and low-grade porphyry copper (Cu) or molybdenum (Mo) systems. Gold commonly occurs as native gold, precious metal tellurides, and as sub-micron gold in arsenian pyrite.

Gold Quartz Veins - Mineral Deposit Profiles, B.C ...

The largest gold-quartz vein deposit in British Columbia is the Bralorne-Pioneer which produced in excess of 117 800 kilograms of Au from ore with an average grade of 9.3 g/t. ECONOMIC LIMITATIONS : These veins are usually less than 2m wide and therefore, only amenable to underground mining.

Epithermal Gold for Explorationists AIG Journal

Bonanza gold grade epithermal quartz gold-silver style mineralization comprising gold fill of an open quartz vein, Edie Creek. An extremely efficient mechanism of gold deposition is required to remove gold from solution and form bonanza grade gold deposits.

Argonaut Gold Drills High Grade Gold Veins Below the El ...

Apr 26, 2021  Argonaut Gold Inc. (TSX: AR) (the "Company", "Argonaut Gold" or "Argonaut") is pleased to announce it has discovered high grade gold veins below the El Crestón open pit at its La Colorada mine in Sonora, Mexico. The high grade intercepts include: Drill hole 20-LCRC-592 intersected 12.2 metres at 98.9 g/t Au and 30.3 g/t Ag, including 3.0 metres of 383.0 g/t Au and 113.5 g/t Ag Drill hole

Outcrop Gold Discusses The Epithermal Vein System On Its ...

Apr 25, 2019  Outcrop Gold Discusses The Epithermal Vein System On Its Cauca Project. Vancouver, BC, Canada – April 25 th, 2019 – Outcrop Gold Corp (“Outcrop Gold or The Company”) (TSX-V: OCG) is pleased to provide an update of the Company’s work on the vein system that overprints its large La Custodia gold-copper porphyry deposit on the Cauca project in Colombia.

INFOGRAPHIC: Red Lake - The high-grade gold ... - MINING.COM

Mar 06, 2015  Most of the gold production in the district has come from structurally controlled vein-type gold deposits near regional mafic volcanic-sediment contact or ‘breaks’. ... capital of high-grade ...

Photos of gold ores, quartz, telluride gold ore and gold ...

These are crystals of Calaverite - a gold, silver and tellurium mineral. This is very high grade gold ore from the Cripple Creek district in Colorado. Many old time miners mistook this type of mineral for low grade sulfides, but this silvery metallic material probably is 40 percent gold by weight.

GREENSTONE-HOSTED QUARTZ-CARBONATE VEIN DEPOSITS

May 11, 2010  The classification of gold deposit types remains Nevertheless, the source of the ore fluid, and hence of a problem, which is more than an academic exercise as it has gold in greenstone-hosted quartz-carbonate vein deposits, a major impact on exploration strategies (e.g. what type of remains unresolved (Groves et al. 2003).

Mining to Date of the San Albino Vein Yields 7,734 Ounces ...

Mining to Date of the San Albino Vein Yields 7,734 Ounces Gold at a Diluted Grade of 17.45 g/t Gold and Positively Reconciles to the MDA Resource Estimate News provided by Mako Mining Corp.

Regional structural control on the distribution of world ...

Mar 30, 2018  In contrast, predominant vein‐type gold deposits in the eastern segment of the Jiaobei and Sulu terranes tend to form N–S corridors. These vein‐type ores may relate to rotational strain induced by movement on pairs of more linear NNE‐trending faults with

Argonaut Gold Drills High Grade Gold Veins Below the El ...

Argonaut Gold Drills High Grade Gold Veins Below the El Crestón Pit at its La Colorada Mine including 12.2 Metres at 98.9 g/t Gold and 30.3 g/t Silver and 21.3 Metres at 44.6 g/t Gold and 274.9 g ...