mining porphyritic texture

Mining and You - Arizona Geological Society

2015-6-27  The term “porphyry copper” is derived from the texture of the igneous rock that forms these intrusive bodies. Porphyritic texture is characterized by larger crystals of feldspar and quartz, known as phenocrysts, which are surrounded by a matrix of very fine-grained crystals. This texture

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Porphyry - Igneous Rocks

Porphyritic texture is a very common texture in igneous rocks in which larger crystals (phenocrysts) are embedded in a fine-grained groundmass. Porphyry is an igneous rock that contains larger crystals (phenocrysts) in a fine-grained groundmass. K-feldspar

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PORPHYRY DEPOSITS - Earth Sci

2017-6-26  The term porphyry copper now includes engineering as well as geological considerations; It refers to large, relatively low grade, epigenetic, intrusion-related deposits that can be mined using mass mining techniques. Geologically, the deposits

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Igneous Rocks and the Rock Cycle

2020-8-26  Porphyritic textured rocks contain both a coarse and fine-grained texture. The coarse grains in a porphyritic rock begin to develop as the magma is cooling below the surface of the earth. Following eruption or exposure to lower temperatures, the remaining magma or lava cools very quickly and forms minerals with fine-grained textures.

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Santa Lucía Project jcmining

Porphyritic texture with quartz eyes, filic alteration of Qz-sericite-pyrite, quartz-molybdenite veinlets, pyrite, chalcopyrite. Oxides of goethite, hematite and jarosite decile moderate. Granodiorite. Porphyric texture with crystals of feldspar, quartz, biotite and amphibole, traces of fine pyrite and traces of oxides of goethite-hematite.

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(PDF) The Ertsberg Stockwork Zone: A Unique Porphyry ...

Very intense endoskarn alteration fractures. However, at one location (on the obliterates porphyritic texture of the dikes by northwest side of the system) there is a 20 altering the entire rock mass to garnet and meter wide occurrence of this phyllic alteration clinopyroxene. Tremolite is the main type.

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Phaneritic Texture - Mining Fundamentals

2014-4-21  Phaneritic Texture - Mining Fundamentals. Igneous textures are used by geologists in identifying the origin of rocks, and for the classification of rocks. Phaneritic texture is one of the six main textures of rocks. Phaneritic rocks are intrusive igneous rocks with coarse crystals of equal size. Phaneritic rocks indicate slow cooling of magma ...

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ROCKS and how to identify them.ppt - SAHRA

PORPHYRITIC (2 grain sizes) ALL CRYSTALLINE IGNEOUS VARIETIES may exhibit porphyritic texture FRAGMENTAL TUFF: Compacted volcanic fragments generally less than 4mm diameter (ash) VOLCANIC BRECCIA: Mixed tuff and angular large (>32mm diameter) fragments AGGLOMERATE: Mixed ash and rounded/sub-rounded large (>32mm diameter) fragments PERIDOTITE:

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Geology Word of the Week: G is for Glomeroporphyritic ...

2011-7-14  There are two other geology words which are related to the word “glomeroporphyritic.”. The first word is “glomeroporphyroclast,” which describes a

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Mining and You - Arizona Geological Society

2015-6-27  The term “porphyry copper” is derived from the texture of the igneous rock that forms these intrusive bodies. Porphyritic texture is characterized by larger crystals of feldspar and quartz, known as phenocrysts, which are surrounded by a matrix of very fine-grained crystals. This texture

Read More
Xtract Resources PLC Bushranger Phase 2 Drilling ...

2021-10-7  “porphyritic” A rock texture containing distinct crystals or crystalline particles embedded in a compact groundmass ... XTR) is a resource, development and mining company whose focus is and will be to acquire brown field resource projects with a view to release value for its shareholders. The projects targeted will be in regions where ...

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Cu-sulfide mineralogy, texture, and geochemistry in the ...

2021-9-20  The Tiegelongnan porphyry-epithermal deposit (2089 Mt @ 0.53% Cu, 0.08 g/t Au) is host to a large variety of Cu-sulfide minerals, mainly chalcopyrite, bornite, covellite, digenite, enargite, and tennantite. We used LA-ICP-MS to investigate the trace element geochemistry of the Tiegelongnan Cu-sulfides, as well as pyrite, to understand the correlation between sulfides and trace elements, gold ...

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Igneous Rocks and the Rock Cycle

2020-8-26  Porphyritic textured rocks contain both a coarse and fine-grained texture. The coarse grains in a porphyritic rock begin to develop as the magma is cooling below the surface of the earth. Following eruption or exposure to lower temperatures, the remaining magma or lava cools very quickly and forms minerals with fine-grained textures.

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Petrographic Characterization of the Semi-industrial

porphyritic microlitic texture with pyroxene phenocrystals (Figure 4 B). The latter are most often altered and transformed into amphiboles, chlorite and epidote. Mesostasis consists of carbonates, chlorite and epidote minerals. To this we must add quartz-carbonates veinlets. Sulphides and oxides are also observed. 4.1.2. Rhyodacites

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Geology of the Porphyritic Granites

Two porphyritic alkali granite plutons char acterized by large euhedral microcline pheno crysts are exposed in parts of Iredell, Rowan. Davie, and Davidson counties in the Central Piedmont of North Carolina (Fig. 1). The purpose of this study is to: (1) describe the mineralogy and texture of the porphyries, (2) present data on the X-ray ...

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Santa Lucía Project jcmining

Porphyritic texture with quartz eyes, filic alteration of Qz-sericite-pyrite, quartz-molybdenite veinlets, pyrite, chalcopyrite. Oxides of goethite, hematite and jarosite decile moderate. Granodiorite. Porphyric texture with crystals of feldspar, quartz, biotite and amphibole, traces of fine pyrite and traces of oxides of goethite-hematite.

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Porphyritic - definition of porphyritic by The Free Dictionary

Define porphyritic. porphyritic synonyms, porphyritic pronunciation, porphyritic translation, English dictionary definition of porphyritic. also porphyritical adj. 1. Of or containing porphyry.

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Geology Word of the Week: G is for Glomeroporphyritic ...

2011-7-14  There are two other geology words which are related to the word “glomeroporphyritic.”. The first word is “glomeroporphyroclast,” which describes a cluster or collection of phenocrysts. Although the word contains the singular “clast,” the term

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Aphanitic Encyclopedia

2018-5-23  aphanitic. aphanitic An igneous rock texture characterized by mineral grains which are too small to be identified without a petrological microscope. These extremely fine-grained, crystalline fabrics are formed when a magma solidifies in response to a very rapid loss of heat and dissolved gases.

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Geology of the Porphyritic Granites

Two porphyritic alkali granite plutons char acterized by large euhedral microcline pheno crysts are exposed in parts of Iredell, Rowan. Davie, and Davidson counties in the Central Piedmont of North Carolina (Fig. 1). The purpose of this study is to: (1) describe the mineralogy and texture of the porphyries, (2) present data on the X-ray ...

Read More
Xtract Resources PLC Bushranger Phase 2 Drilling ...

2021-10-7  “porphyritic” A rock texture containing distinct crystals or crystalline particles embedded in a compact groundmass ... XTR) is a resource, development and mining company whose focus is and will be to acquire brown field resource projects with a view to release value for its shareholders. The projects targeted will be in regions where ...

Read More
Petrographic Characterization of the Semi-industrial

porphyritic microlitic texture with pyroxene phenocrystals (Figure 4 B). The latter are most often altered and transformed into amphiboles, chlorite and epidote. Mesostasis consists of carbonates, chlorite and epidote minerals. To this we must add quartz-carbonates veinlets. Sulphides and oxides are also observed. 4.1.2. Rhyodacites

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Agmatitic porphyritic granite: Mineral information, data ...

A porphyritic granite with an agmatitic texture. SUPPORT US. Covid-19 has significantly affected our fundraising. Please help! Log In Register. ... Mining Companies Statistics Users Mineral Museums Mineral Shows Events The Mindat Directory Device Settings The Mineral Quiz.

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The Anatomy of an Alkalic Porphyry Cu-Au System:

The quartz monzonite porphyry intrusions have a distinct pipe-like morphology and are ubiquitously K-feldspar–altered with a crystal-crowded porphyritic texture. The textures of the quartz monzonite porphyries and common occurrence of porphyry-cemented contact breccias indicate they were forcibly emplaced and of relatively low viscosity.

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Distribution of Marginal Texture in the Quanah Granite ...

2017-4-23  porphyritic facies, GMLC. Note the angular geometries of the fine and porphyritic facies. Mining pits are marked with crossed pick and hammer. The topographic base is the U.S.G.S. Quanah Mountain 7.5’ quadrangle, Oklahoma, 10’ contour interval. Figure 6 – Field photos of the Quanah Granite margin. A.) Porphyritic facies texture in the ...

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Petrography of Volcanic Rocks at Q-prospect, Akara Gold ...

2019-7-9  Permo-Triassic volcanic rocks at Q-prospect, northern Akara gold mining area in Phichit Province, north central Thailand, can be subdivided into porphyritic andesite, andesitic tuff and rhyolitic tuff ... Porphyritic texture is clearly observed in these rock samples. Microscopically, phenocrysts are mainly composed of about 25% K-feldspar, 15% ...

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Yaoure Gold Project - Mining Technology Mining News

Amara Mining Côte d’Ivoire (Amara, formerly Cluff Gold) acquired the mine in 2004. ... The northern region of the project is intruded by a large granodiorite with a subtle porphyritic texture, while the volcaniclastic unit is situated near the contact of the

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Porphyritic - definition of porphyritic by The Free Dictionary

Define porphyritic. porphyritic synonyms, porphyritic pronunciation, porphyritic translation, English dictionary definition of porphyritic. also porphyritical adj. 1. Of or containing porphyry.

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Aphanitic Encyclopedia

2018-5-23  aphanitic. aphanitic An igneous rock texture characterized by mineral grains which are too small to be identified without a petrological microscope. These extremely fine-grained, crystalline fabrics are formed when a magma solidifies in response to a very rapid loss of heat and dissolved gases.

Read More

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