grade control in vein type gold deposits

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Grade Control | SpringerLink

Abstract In some mining operations, one of the most important roles played by the geologist is the supervision of grade control In an open-pit operation, this involves the sampling of blast-hole cuttings produced by down-the-hole hammer drills and the classification of bench reserves into ore, low grade or waste material, or into various metallurgical typ...

VEIN DEPOSITS - Earth science

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...

Grade control geological mapping in underground gold vein ,

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...

Vein-type ore deposits: Introduction - ScienceDirect

The first metals used by Early Man appear to have been copper, gold and silver; produced by charcoal smelting (reduction) of the "oxide ore" caps from a variety of different orebody types that included veins; although much of the VEIN-TYPE ORE DEPOSITS: INTRODUCTION 207 gold ,...

Gold in British Columbia

Veins Historically, the main sources of gold in the province were mesothermal and epithermal veins More than 400 veins yielded , high-grade target type Brucejack, a potential producer in northwest- , Selected Gold Deposits in British Columbia BC Gold Deposits...

Epithermal Gold Deposits : their characteristics & modeling

Epithermal Gold Deposits : their characteristics & modeling , Grade and Tonnage relationship in gold deposits (a) Paleoplacer Deposits (b) Lode gold deposits (c) Epithermal vein type deposits (d) Sediment hosted deposits, (e) Hot spring deposits and (f) Porphyry deposits...

MP1-Geology and Genesis of Gold Mineralization, and

Tectonic settings of gold-rich epigenetic mineral deposits Epithermal veins and gold-rich porphyry and skarn deposits, form in the shallow (< 5 km) parts of both island and continental arcs in compressional through extensional regim The epithermal veins, as well as the sedimentary rock-hosted type Carlin ores, also are emplaced in shallow...

Grade control geological mapping in underground gold vein ,

Grade control geological mapping in underground gold vein operations Article (PDF Available) in Applied Earth Science IMM Transactions section B 121(2):96-103 ,...

Grab sampling for underground gold mine grade control

Grab sampling for underground gold mine grade control SC DOMINY Snowden Mining Industry Consultants Limited, Weybridge, England and University of Ballarat, Mount Helen, Australia 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...

AU-AG-TE VEIN DEPOSITS (MODEL 22b; Cox and Bagby, 1986)

AU-AG-TE VEIN DEPOSITS (MODEL 22b; Cox and Bagby, 1986) by Karen D Kelley, Theodore J Armbrustmacher, and Douglas P Klein SUMMARY OF RELEVANT GEOLOGIC, GEOENVIRONMENTAL, AND GEOPHYSICAL INFORMATION Deposit geology Deposits consist of native gold and (or) gold-silver telluride minerals in high-grade quartz veins and (or) low-grade....

Gold Deposit Classification: List of 10 Types of Gold Deposits

Carbonatites and carbonatite-related deposits Auriferous skarn and gold skarn type deposit Gold/Silver and vise-versa veins, lodes, mineralized pipes and irregular silicified deposits in fraction, faults + zon Auriferous veins, lodes, sheeted zones, saddle reefs in ,...

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...

TECHNICAL NOTE Grade control geological mapping in ,

Grade control geological mapping in underground gold vein operations S C Dominy*1,2,3 and I M Platten4 Grade control is a process of maximising value and reducing risk It requires the delivery of tonnes at an optimum grade to the mill, via the accurate definition of ore and waste It essentially...

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 ....

Carlin Type Gold Deposit - Mineral Processing & Metallurgy

Carlin deposits are named after the little settlements of Carlin in Northeastern Nevada which is situated on the linear deposits that make up the Carlin trend where this type of deposit was first identified and where the majority of the gold currently mined in the US is derived from...

Ultra High Grade Gold Vein In A Heavily Mineralized ,

Nov 21, 2018· An ultra high grade gold vein found in a heavily mineralized outcrop! Solid mineral vein panned out to reveal high grade gold, platinum, palladium, silver and other minerals! Vein contains ....

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...

What Makes a World-class Gold Deposit? | INN

But apart from size, what makes a world-class gold deposit? Various characteristics must be considered when determining the status of a gold deposit, including deposit type, average grade and ....

High Grade Gold Left In Old Mines & Finding Loads Of Vuggy ,

Jul 16, 2018· High grade gold from mineralized samples taken at a couple gold mines on our mineral property and finding loads of vuggy quartz veins all over the ,...