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where can valuable mineral deposits such as gold form

Home - where can valuable mineral deposits such as gold form

How does Gold Naturally Form on Earth''s Crust Veins

These placer deposits are where the majority of present day gold miners go looking for gold, as these concentrations can be some of the most productive areas. The erosion process of water over time reveals the places in which large gold deposits can be found. Streams that cut through the rocks carry the smaller elements of gold down with them.

Ore Wikipedia

An ore is a natural occurrence of rock or sediment that contains sufficient minerals with economically important elements, typically metals, that can be economically extracted from the deposit. The ores are extracted at a profit from the earth through mining they are then refined (often via smelting) to extract the valuable element, or elements.. The ore grade, or concentration of an ore

Please Help Me! ( 10 points)? Yahoo Answers

Sep 27, 2007 ·Ń. Where can earthquakes occur? (Points: 1) where two plates collide where two plates move apart where two plates slide against each other at any of the above loions 4. Where can valuable mineral deposits, such as gold, form? (Points: 1) at subduction zones on land at areas where two plates collide deep in underground mines 5.

What Are the Different Ways That Minerals Can Be Mined

What Are the Different Ways That Minerals Can Be Mined? Surface or opencast mining is the easiest way to produce a mineral ore when the deposits of economically valuable minerals lie close to the surface. Placer mining is a form of openpit mining of minerals from alluvial deposits, such as sands and gravels in existing or ancient

Chromite: The only mineral ore of chromium metal

During this slow cooling, chromite and associated minerals crystallized early while the magma was still at a very high temperature. Their crystals then settled to the bottom of the magma chamber to form a layered deposit. Some of the layers in these deposits can contain 50% or more chromite

Plate Tectonics and the Loion of Mineral Deposits

This process is responsible for forming over half the world''s copper deposits. These magmatic fluids can also concentrate gold deposits, such as the Mother Lode of the Sierra Nevada, which was the

Minerals Flashcards Quizlet

form when they precipitate during evaporation of lake of seawater, including the borax deposits and marine deposits of gypsum. Placer Deposits occur when minerals with high specific gravity (can float) can be concentrated by flowing water in placer deposits found in stream beds and along shorelines.

Topic 7: Placer Mineral Deposits ResearchGate

Topic 7: Placer Mineral Deposits These deposits form because of gold''s high weight and can be prospected with a gold pan (such as gold "nuggets").

What do you mean "hydrothermal"? sandatlas.org

Hydrothermal deposits may also form subaerally in volcanically active areas. Hydrothermal mineralization is the precipitation of minerals out of the hot fluid. What type of minerals can we expect to find? Really very many and different type, but sulfides tend to be the most characteristic among those that are valuable to us.

What Are the Different Ways That Minerals Can Be Mined

What Are the Different Ways That Minerals Can Be Mined? Surface or opencast mining is the easiest way to produce a mineral ore when the deposits of economically valuable minerals lie close to the surface. Placer mining is a form of openpit mining of minerals from alluvial deposits, such as sands and gravels in existing or ancient

The Geology of Gold Deposits Nevada Outback

At times, geologists will take an extensive number of soil and rock samples on a regular grid covering an area suspected to contain valuable deposits. Anomalous amounts of gold or elements known to be associated with gold in valuable deposits such as arsenic or Mercury, will indie areas which may require further study or even drilling.

GEMS AND GEM MINERALS OF NORTH CAROLINA*

found incidentally in a search for other minerals, or in the commercial mining of these, such as gold, corundum, mica, and monazite. There have been, however, certain localities that, after the discovery of the gems, have been developed and worked for the gem material. The variety of gem minerals found in North Carolina is probably

Volcanic Minerals Oregon State University

Gold in Epithermal Deposits . Epithermal refers to mineral deposits that form in association with hot waters. The deposits form within 1 km of the surface and water temperatures are about 50200 degrees C. Shallow bodies of magma supply heat. The rising hot water carries dissolved gold and other elements.

Metallic Minerals Ministry of Energy, Northern

Apr 16, 2019 · Metallic minerals occur in rare, naturally formed concentrations known as mineral deposits. These deposits can consist of a variety of metallic minerals containing valuable metals such as nickel (pentlandite), copper (chalcopyrite), zinc (sphalerite), lead (galena) and gold (occurs as a native element or as a minor constituent within other

Minerals & Elements Minerals Eduion Coalition

A mineral occurrence is a concentration of a mineral (usually considered in terms of some commodity, such as gold) that is considered valuable by someone somewhere or that is of scientific or technical interest. In rare instances, the commodity might not even be concentrated above its average crustal abundance. Additional mineral resource terms

Volcanic Minerals Oregon State University

Gold in Epithermal Deposits . Epithermal refers to mineral deposits that form in association with hot waters. The deposits form within 1 km of the surface and water temperatures are about 50200 degrees C. Shallow bodies of magma supply heat. The rising hot water carries dissolved gold and other elements.

Geology of Copper Properties, Mining, and Formation of

Copper is found alongside many other types of ore. It can be found near gold, silver, zinc, lead, and other types of metal deposits. When mixed in with other ores, copper is not usually found in great abundance. Until the development of the modern copper mining process, it was typically a byproduct of mining for other metals.

What is a Mineral Deposit by Definition

The expression mineral deposits is conveniently used to cover both metal ores and other valuable minerals. In the discussion of mineral deposits it is usual to include certain minerals of commercial value, such as talc, barite, apatite, feldspar, and fluorspar, which are not used as sources of metals.

Ore genesis Wikipedia

Placer gold deposits form via gravity, with the density of gold causing it to sink into trap sites within the river bed, or where water velocity drops, such as bends in rivers and behind boulders. Often placer deposits are found within sedimentary rocks and can be billions of years old, for instance the Witwatersrand deposits in South Africa .

Topic 7: Placer Mineral Deposits ResearchGate

Topic 7: Placer Mineral Deposits These deposits form because of gold''s high weight and can be prospected with a gold pan (such as gold "nuggets").

Mineral deposit Hydrothermal solution Britannica.com

Mineral deposit Hydrothermal solution: Hydrothermal mineral deposits are those in which hot water serves as a concentrating, transporting, and depositing agent. They are the most numerous of all classes of deposit. Hydrothermal deposits are never formed from pure water, because pure water is a poor solvent of most ore minerals.

ore National Geographic Society

Ore is a deposit in the Earths crust of one or more valuable minerals. The most valuable ore deposits contain metals crucial to industry and trade, like copper, gold, and iron. Copper ore is mined for a variety of industrial uses. Copper, an excellent conductor of electricity, is used as electrical wire.Copper is also used in construction.

Minerals & Elements Minerals Eduion Coalition

A mineral occurrence is a concentration of a mineral (usually considered in terms of some commodity, such as gold) that is considered valuable by someone somewhere or that is of scientific or technical interest. In rare instances, the commodity might not even be concentrated above its average crustal abundance. Additional mineral resource terms

Mining Claims and Sites on Federal lands Bureau of Land

valuable mineral deposits. Examples include quartz or other veins bearing gold or other metallic mineral deposits and large volume (but low grade) disseminated metallic deposits, such as Carlintype gold deposits and copperbearing granites.

Minerals & Mining Law

Discovery of a valuable mineral deposit, as defined under federal law, is essential to the validity of an unpatented mining claim and is required on each mining claim individually. The loion is made as a lode claim for mineral deposits found as veins or rock in place, or as a placer claim for other deposits.

Mineral Deposits Chiang Mai University

Mineral Deposits. Mineral deposits are concentrations of minerals and, as such, is a geological term. Whether a mineral deposit is also an ore deposit depends on economics. "Ore" is therefore an economic term. Ore deposits can be classified according to a number of different criteria, such as

Mineral Resources Tulane University

Sedimentary Ore Deposits substances are concentrated by chemical precipitation from lake or sea water. Although clastic sedimentary processes can form mineral deposits, the term sedimentary mineral deposit is restricted to chemical sedimentation, where minerals containing valuable substances are precipitated directly out of water.

University of Minnesota''s Mineral Pages: Pyrite

Those iron oxide minerals occur in larger concentrations and volumes than pyrite, so they are a more economical iron source. Vein pyrite, however, may reveal the presence of other valuable minerals, such as chalcopyrite and gold. In the recent past, pyrite was mined as a sulfur source for sulfuric acid, an essential commodity for chemical industry.

» Characteristics of Gold

When a valuable lode is found, in order to mine it, the ore is usually blasted out of the vein and is crushed down into a very fine powder from which the gold, silver and/or other valuable minerals can be extracted by any number of chemical or mechanical procedures. This entire process is called "lode mining" or "hardrock mining".

Gold: The mineral native Gold information and pictures

The Gold eventually settles at the bottom of the water, and due to its heaviness remains there. Other nuggets also get caught in the same area, forming a placer deposit. Gold is one of the heaviest minerals. When pure, it has a specific gravity of 19.3. Due to its weight, it can be panned because the Gold sinks to the bottom.

Geology: What is a Mineral Deposit? — Mining Focus

A mineral is a naturally occurring chemical compound. Metals rarely occur in their pure ("native") form, but are formed in nature combined with sulphur as minerals called sulphides or oxygen as minerals called oxides. An exception is gold which occurs in its pure metallic form, which is why it was the first metal discovered and used by humans.

Mineral deposit Britannica.com

Mineral deposits are what prospectors seek. The terms ore mineral and mineral deposit were originally applied only to minerals and deposits from which metals are recovered, but present usage includes a few nonmetallic minerals, such as barite and fluorite, that are found in the same kinds of deposit as metallic minerals.

Gold: The mineral native Gold information and pictures

The Gold eventually settles at the bottom of the water, and due to its heaviness remains there. Other nuggets also get caught in the same area, forming a placer deposit. Gold is one of the heaviest minerals. When pure, it has a specific gravity of 19.3. Due to its weight, it can be panned because the Gold sinks to the bottom.

Module 3 – Geology and Mineral Identifiion

Pyrite ("fool''s gold") and other metal sulfide minerals. Metal sulfide minerals are moderately dense (4 to 7.6 g/cm 3) and accompany gold or form their own lode deposits in bedrock. However they are unstable at Earth''s surface where they readily react with oxygen (oxidize) during weathering.

Photos of Natural Silver Ore, Silver minerals, Crystal

Telluride minerals such as calaverite, are also important silver ores in some mining districts. This sample of rich gold and silver ore comes from the Cripple Creek district in Colorado. The mossy metallic colored mineral on this specimen is calaverite, a mineral rich in both gold and silver.

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