bearing rock pyrite

Petrology of Pyrite bearing Sandstones: Inference for Reservoir …

Petrology of Pyrite bearing Sandstones: Inference for Reservoir Rock Quality and Paleoredox Conditions Ali A. M. and Kwaya M. Y. Department of Geology, Bayero University Kano (BUK), Kano . ABSTRACT Pyrites are usually indicators of paleoredox

Nodular Pyrite Varieties from the Oil-Bearing Jurassic Bazhenov …

minerals Article Highly Metalliferous Potential of Framboidal and Nodular Pyrite Varieties from the Oil-Bearing Jurassic Bazhenov Formation, Western Siberia Kirill S. Ivanov 1,*, Valery V. Maslennikov 2, Dmitry A. Artemyev 2,3 and Aleksandr S. Tseluiko 2 1 Institute of Geology and Geochemistry, Ural Branch of Russian Academy of Sciences, ...

Copper-bearing Pyrite: Mineral information, data and …

A copper-bearing variety of pyrite. The substitution of Cu for Fe results in changes in unit-cell parameter and Raman spectra (Pačevski et al., 2008).

Table 1 from Source of arsenic-bearing pyrite in …

Table 1 Arsenic content of whole rock and pyrite samples. - "Source of arsenic-bearing pyrite in southwestern Vermont, USA: sulfur isotope evidence." DOI: 10.1016/j.scitotenv.2014.03.072 Corpus ID: 28150444 Source of arsenic-bearing pyrite in southwestern

5.2 Chemical Weathering | Physical Geology

The runoff from areas where this process is taking place is known as acid rock drainage (ARD), and even a rock with 1% or 2% pyrite can produce significant ARD. Some of the worst examples of ARD are at metal mine sites, especially where pyrite-bearing rock and waste material have been mined from deep underground and then piled up and left exposed to water and oxygen.

Global Biogeochemical Cycles

2-bearing rock) bringing these reduced materials into contact with air and water, generating sulfuric acid and oxidized iron (equation (1)). Pyrite oxidation and release of sulfuric acid 15O 2 þ 14H 2Oþ 15FeS 2 ¼ 8H 2SO 4 þ4Fe OHðÞ 3 (1) Raymond and Oh

Geochemistry of Au-bearing pyrite from the Sepon …

0 ) in both sedimentary-rock hosted gold and skarn Cu-Au deposits. Gold is present in an early syngenetic pyrite ... The chemistry of pyrite has also shown that both ore-forming fluids are undersaturated in Au similar to Au-bearing pyrite in the Carlin-type ...

How can I recognise gold-bearing rock? And how do I tell …

 · Your first and usually only clue is that the rock is white quartz. Pyrite often comes in large chunks, much larger than gold. Pyrite sparkles, gold gleams. Pyrite will break when hit with a hammer, but gold only flattens. Nitric acid will attack pyrite but not gold. Except ...

Links between organic matter and gold-bearing arsenian pyrite at …

Links between organic matter and gold-bearing arsenian pyrite at Shahuindo (Cajamarca, Peru): an integrated analytical and modeling study Jean Vallance1, Macneill Balboa 1, Brigitte Berna 1, Omar Cabrera 2 Camille Baya 3, Patrice Baby 3, Gleb S. Pokrovski 3 1 Especialidad Ingeniería Geológica, Pontificia Universidad ólica del Perú, Av. Universitaria 1801, San

PYRITE OXIDATION RATES FROM HUMIDITY CELL TESTING OF GREENSTONE ROCK

PYRITE OXIDATION RATES FROM HUMIDITY CELL TESTING OF GREENSTONE ROCK1 Kim A. Lapakko2 David A. Antonson2 Abstract. Fourteen samples of pyrite-bearing Archean greenstone rock (d < 6.35 mm, 0.08 ≤ FeS2 ≤ 2.25 wt. %) were characterized and subjected to laboratory ...

Pyrite: Mineral information, data and localities.

Pyrite Group. The isometric (cubic) polymorph of orthorhombic marcasite pare UM1997-43-S:Fe. Pyrite is a very common mineral (also one of the most common natural sulfides, and the most common disulfide), found in a wide variety of geological formations from sedimentary deposits to hydrothermal veins and as a constituent of metamorphic rocks.

(PDF) Arsenopyrite and As-bearing pyrite from the …

(pyrite-1) before growth of As-rich pyrite Zones of As-enriched pyrite-2 sometimes 36 AS -BEARING PYRITE ^ ROUDNY¨ DEPOSIT enclosed small grains of arsenopyrite (Fig. 4c On BSE images, it is contrast to the As-poor pyrite cores formed by heterogeneous due to variable proportions of As, supposed pyrite-1.

Pyrite: Mineral information, data and localities.

Pyrite Group. The isometric (cubic) polymorph of orthorhombic marcasite pare UM1997-43-S:Fe. Pyrite is a very common mineral (also one of the most common natural sulfides, and the most common disulfide), found in a wide variety of geological formations from sedimentary deposits to hydrothermal veins and as a constituent of metamorphic rocks.

How can I recognise gold-bearing rock? And how do I tell …

 · Your first and usually only clue is that the rock is white quartz. Pyrite often comes in large chunks, much larger than gold. Pyrite sparkles, gold gleams. Pyrite will break when hit with a hammer, but gold only flattens. Nitric acid will attack pyrite but not gold. Except ...

Gold-Bearing Soil Types | Our Pastimes

 · Pyrite Rock and Limestone Soil that contains limestone is rich in calcium and minerals that form both shallow and deep rock formations. Gold-bearing arsenian pyrite rocks are found in limestone soil deposits in several regions of China.

Arsenopyrite Mineral | Uses and Properties

 · Arsenopyrite is an iron arsenic sulfide with a chemical composition of FeAsS. It is the most abundant arsenic-bearing mineral and the primary ore of arsenic metal. It is associated with other sulfide minerals in organic-rich sedimentary rocks, metamorphic rocks, and igneous rocks in many parts of ...

Part C: Assessing the aggressive chemical environment

ground (soil, rock or fill) and in groundwater. Sulfates can also be derived by oxidation of sulfides, such as pyrite (FeS2), by natural processes such as weathering, sometimes aided by construction activities. It is, therefore, necessary to consider the distribution of

Global Biogeochemical Cycles

2-bearing rock) bringing these reduced materials into contact with air and water, generating sulfuric acid and oxidized iron (equation (1)). Pyrite oxidation and release of sulfuric acid 15O 2 þ 14H 2Oþ 15FeS 2 ¼ 8H 2SO 4 þ4Fe OHðÞ 3 (1) Raymond and Oh

Au-Pd AND Bi-Se BEARING PYRITE AND CHALCOPYRITE FROM …

tained for Au-Pd-bearing pyrite and chalcopyrite as well as Bi-Se±Au±Ag±Te minerals, which are the subject of this study. 2 EXPERIMENTAL PART Field sampling took place within the boundaries of the active Buchim open-pit mine. Samples were taken from the

Global Biogeochemical Cycles

2-bearing rock) bringing these reduced materials into contact with air and water, generating sulfuric acid and oxidized iron (equation (1)). Pyrite oxidation and release of sulfuric acid 15O 2 þ 14H 2Oþ 15FeS 2 ¼ 8H 2SO 4 þ4Fe OHðÞ 3 (1) Raymond and Oh

Provenance of Detrital Pyrite in Archean Sedimentary …

 · Any pyrite-bearing rock could potentially have contributed pyrite detritus. However, many of the sources proposed do not necessarily have pyrite in abundances required to contribute the large amounts of detrital pyrite found in many reefs.

Pyrite: The mineral pyrite information and pictures

Pyrite was once used as a source of sulfur, but is now only a minor ore for both sulfur and iron. Pyrite from some localities is auriferous, and therefore is used as an ore of gold in gold-bearing localities.Pyrite was polished by the Native Americans in the early times and used as mirrors. ...

Rb-Sr geochronology of single gold-bearing pyrite grains …

Gold-bearing pyrite occurs as disseminations in the host rock and as quartz-sulfide veins cross-cutting the potassic and phyllic alteration assemblage. Rubidium (Rb) - strontium (Sr) analyses on sericite within five individual pyrite grains from a phyllic alteration sample …

pyrite | Properties & Facts | Britannica

Pyrite occurs in large deposits in contact metamorphic rocks posits of copper-bearing pyrite are widely distributed and often of great size.They usually occur in or near the contact of eruptive rocks with schists or slates.Pyrite weathers rapidly to hydrated iron oxide, goethite, or limonite; pseudomorphs of goethite after pyrite are common.

Pyrite Oxidation Rates from Laboratory Tests on Waste Rock

Pyrite oxidation is a major concern related to waste rock excavated during mining operations. Pyrite and other iron-bearing sulfide minerals oxidize in the presence of oxygen and water and can produce acid, as well as iron oxyhydroxides and sulfate (reaction 1).

CBD-152. Expansion of Pyritic Shales

Pyrite bearing material always becomes acid, so that this is one way of identifying weathering of this type unless the material was originally highly calcareous. Pyritic rocks that have caused heave problems usually contain calcite either as an integral part of the rock, as in calcareous shales and limestones, or as fracture fillings cutting through noncalcareous shale.

PYRITE OXIDATION RATES FROM HUMIDITY CELL TESTING OF …

PYRITE OXIDATION RATES FROM HUMIDITY CELL TESTING OF GREENSTONE ROCK1 Kim A. Lapakko2 David A. Antonson2 Abstract. Fourteen samples of pyrite-bearing Archean greenstone rock (d < 6.35 mm, 0.08 ≤ FeS2 ≤ 2.25 wt. %) were characterized and subjected to laboratory ...

Table 1 from Source of arsenic-bearing pyrite in …

Table 1 Arsenic content of whole rock and pyrite samples. - "Source of arsenic-bearing pyrite in southwestern Vermont, USA: sulfur isotope evidence." DOI: 10.1016/j.scitotenv.2014.03.072 Corpus ID: 28150444 Source of arsenic-bearing pyrite in southwestern

Part C: Assessing the aggressive chemical environment

ground (soil, rock or fill) and in groundwater. Sulfates can also be derived by oxidation of sulfides, such as pyrite (FeS2), by natural processes such as weathering, sometimes aided by construction activities. It is, therefore, necessary to consider the distribution of

Copper-bearing Pyrite: Mineral information, data and …

A copper-bearing variety of pyrite. The substitution of Cu for Fe results in changes in unit-cell parameter and Raman spectra (Pačevski et al., 2008).

Copper-bearing Pyrite: Mineral information, data and …

A copper-bearing variety of pyrite. The substitution of Cu for Fe results in changes in unit-cell parameter and Raman spectra (Pačevski et al., 2008).

Au-Pd AND Bi-Se BEARING PYRITE AND CHALCOPYRITE FROM …

tained for Au-Pd-bearing pyrite and chalcopyrite as well as Bi-Se±Au±Ag±Te minerals, which are the subject of this study. 2 EXPERIMENTAL PART Field sampling took place within the boundaries of the active Buchim open-pit mine. Samples were taken from the

Copper-bearing Pyrite: Mineral information, data and …

A copper-bearing variety of pyrite. The substitution of Cu for Fe results in changes in unit-cell parameter and Raman spectra (Pačevski et al., 2008).

Mineralogical and morphological studies of gold-bearing arsenopyrite and pyrite …

hexahedral and pentahedral forms in three rock samples of the carbonaceous-terrigenous formation in the deposits. Key words: Bakyrchik, gold-bearing arsenopyrite and pyrite, acicular-prismatic ...

WEATHERING OF PYRITE-BEARING GREENSCHIST FROM THE ELY …

WEATHERING OF PYRITE-BEARING GREENSCHIST FROM THE ELY GREENSTONE: TWELVE YEAR LABORATORY AND FIELD EXPERIMENTS April 2014 Minnesota Department of Natural Resources Division of Lands and Minerals 500 Lafayette Road, Box

Pyrite

Pyrite''s metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool''s gold.The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to refer to pyrite found in coal. The name pyrite is derived from the Greek πυρίτης λίθος (pyritēs lithos), "stone or mineral which strikes fire", in turn from ...

CBD-152. Expansion of Pyritic Shales

Pyrite bearing material always becomes acid, so that this is one way of identifying weathering of this type unless the material was originally highly calcareous. Pyritic rocks that have caused heave problems usually contain calcite either as an integral part of the rock, as in calcareous shales and limestones, or as fracture fillings cutting through noncalcareous shale.

Cobalt-bearing Pyrite: Mineral information, data and …

A cobalt-bearing variety of pyrite. Gansu Jiuquan Guazhou Co. Xiaowannanshan Au deposit Qingshan Wang (2008): Gold Science and Technology 16(1), 28-34 Guangxi Hechi Yizhou District Longtou Mine Hunan Metallurgical Geology Research Team 236

Rb-Sr geochronology of single gold-bearing pyrite grains …

Gold-bearing pyrite occurs as disseminations in the host rock and as quartz-sulfide veins cross-cutting the potassic and phyllic alteration assemblage. Rubidium (Rb) - strontium (Sr) analyses on sericite within five individual pyrite grains from a phyllic alteration sample …

Pyrite: Mineral information, data and localities.

Pyrite Group. The isometric (cubic) polymorph of orthorhombic marcasite pare UM1997-43-S:Fe. Pyrite is a very common mineral (also one of the most common natural sulfides, and the most common disulfide), found in a wide variety of geological formations from sedimentary deposits to hydrothermal veins and as a constituent of metamorphic rocks.