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What mineral occurs in veins? - Answers

A mineral by definition occurs naturally on or under the Earth's surface. Sodium chloride, for example is a mineral that occurs in large quantities in certain places.

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Mineral Vein Formation Mechanism

A vein may be defined as an aggregation of mineral matter, more or less tabular or lenticular in form, which was deposited from solution and is of later origin than the inclosing rock. This definition differs from the one found in many textbooks in that no assumption is made as to the origin of the space occupied by the vein or the manner in which the mineral matter was deposited.

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CREEDE, COMSTOCK, AND SADO EPITHERMAL VEIN .

Vein intersection 3000 m 2750 m Figure 2. Longitudinal section of the A vein, Bulldog Mountain vein system, Creede district, Colorado, showing lateral and vertical vein mineral zoning patterns. The various mineralogic zones are ranked according to their potential to generate acid drainage water from mine workings or mine waste.

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CREEDE, COMSTOCK, AND SADO EPITHERMAL VEIN .

Vein intersection 3000 m 2750 m Figure 2. Longitudinal section of the A vein, Bulldog Mountain vein system, Creede district, Colorado, showing lateral and vertical vein mineral zoning patterns. The various mineralogic zones are ranked according to their potential to generate acid drainage water from mine workings or mine waste.

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How can vein minerals form - answers

A vein of silver forms from a solution by vein minerals that form in fissures in the existing rock, either thru deposition by mineral saturated hydrothermal fluids, or injection of magma and ...

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Veins (Geology) - Encyclopedia - theodora

The commonest of the gangue minerals are quartz, calcite, barytes and fluor-spar. Usually a large number of minerals occurs in each vein, and the natural association or "paragenesis" of certain minerals which frequently are found together is a practical guide of much value to the engineer and prospector.

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Vein (geology) - Wikipedia

In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock.Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation.The hydraulic flow involved is usually due to hydrothermal circulation.. Veins are classically thought of as being the result of growth of crystals on the walls of planar fractures in ...

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Veins and Hydrothermal Deposits - geologyin

Veins are mineral deposits which form when a preexisting fracture or fissure within a host rock is filled with new mineral material. The deposition of minerals is typically performed by circulating aqueous solutions. Many ore deposits of economic importance occur in veins. Vein deposits are believed ...

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Geology Chapter 4 Flashcards | Quizlet

A metal-rich accumulation of mineral matter that occurs along a fracture or bedding plane. disseminated deposit. a deposit of ore minerals that is scattered through volumes of rock much larger than a vein; Flickr Creative Commons Images. Some images used in this set are licensed under the Creative Commons through Flickr.

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Grass Valley Mining District, Nevada Co., California, USA

Grass Valley Mining District, Nevada Co., California, USA : Location: A former Au-W mining area, this famous mining district is in western Nevada County in the immediate area of the town of Grass Valley. The Nevada City district adjoins it on ...

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Properties of Minerals | Earth Science | Quiz | Visionlearning

Minerals are classified on the basis of their chemical composition, which is expressed in their physical properties. This module, the second in a series on minerals, describes the physical properties that are commonly used to identify minerals. These include color, .

Dawsonite as a daughter mineral in hydrothermal fluid ...

mineral but virtually unknown as a normal vein or alteration mineral The signifi- cance of these observations will be discussed in later pages. All of the dawsonite-bearing fluid inclusions are rich in CO 2 and most shown a dis- tinct rim of liquid CO 2 around the vapor phase at room temperature (Fig. 1). Upon

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2.3 Growth Morphology - tectonique

If a vein is composed of two minerals (e.g. quartz and calcite), it can occur that one mineral shows syntaxial growth, while the other grows simultaneously with an antitaxial growth morphology. The syntaxial mineral started growing from the wall rock inwards, while the second mineral .

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VEIN MINERALOGY - Ocean Drilling Program

Plagioclase is the most common and abundant vein mineral in Hole 735B. It is primarily present in felsic, plagioclase + diopside, and plagioclase + amphibole veins but can also be present in narrow monomineralic veinlets of Na-rich plagioclase (Robinson et al., 1991).

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Sericitic and Advanced Argillic Mineral Assemblages and ...

Butte, in contrast to topaz in those porphyry deposits in which a more fluorine-rich topaz occurs in sericitic and potassic assemblages. Resolution is a relatively arsenic-poor system, in strong contrast to the nearby Magma vein system. The deeper part of the .

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Dawsonite as a daughter mineral in hydrothermal fluid ...

mineral but virtually unknown as a normal vein or alteration mineral The signifi- cance of these observations will be discussed in later pages. All of the dawsonite-bearing fluid inclusions are rich in CO 2 and most shown a dis- tinct rim of liquid CO 2 around the vapor phase at room temperature (Fig. 1). Upon

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VEIN DEPOSITS - Earth science

Mining requires adits, drifts, shafts and narrow slopes. If a vein system occurs near the surface it may be possible to mine by open pit methods which would greatly reduce mining costs. Mineral Associations - gold with pyrrhotite, e.g. Scottie Gold - gold with arsenopyrite, e.g. Rossland - .

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VEIN QUARTZ IN IA

white quartz vein has a strike of N 60" E and is exposed discontinuously for about 0.3 mile with a visible width of 70 feet (Sweet, 1986)(Figure 3). This quartz vein occurs on and approximately parallel to the crest of a northeast-trending ridge, followed in part by the state road. An individual

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How can vein minerals form - answers

A vein of silver forms from a solution by vein minerals that form in fissures in the existing rock, either thru deposition by mineral saturated hydrothermal fluids, or injection of magma and ...

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Central Kentucky Mineral District, Kentucky Geological ...

The mineral vein is not exposed at the surface and was discovered in 1979 during excavation of air shaft no. 5 in the underground limestone mine. The vein occurs along a north-trending subsurface fault/fracture system in the High Bridge Group.

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VEIN DEPOSITS - Earth science

Mining requires adits, drifts, shafts and narrow slopes. If a vein system occurs near the surface it may be possible to mine by open pit methods which would greatly reduce mining costs. Mineral Associations - gold with pyrrhotite, e.g. Scottie Gold - gold with arsenopyrite, e.g. Rossland - .

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Mineral Deposits: Meaning and Composition | Geology

Mineral Deposits: Meaning and Composition | Geology. Article shared by: ... A tabular mass of ore more or less sharply defined from the rock is a vein. While the mineral veins are in the process of formation, some irregular openings or cavities are formed called vugs or druses. ... rich green mineral. It occurs in the oxidation zone of copper ...

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