Pyritic shale

Disposal of Pyritic Slate or Inert Construction Material

The oxidation of pyrite following exposure of pyrite bearing deposits during earthworks and construction activities has been observed to progress rapidly on a timescale significant to construction, and the process produces conditions that are chemically aggressive to engineering material particularly buried steel and concrete (Reid et al. 2001, 2005; BRE 2001).... pyritic ash pulp densities 10 ... Comparative Bioleaching and Mineralogical Characterization of Black Shale-Hosted Ores and Corresponding Flotation ConcentratesBioturbation is generally sparse, with thin discrete pyritic burrows, while the benthic fauna is dominated by deposit feeding protobranch bivalves. 3. (c) Bituminous shale: a finely laminated sediment with pyritic calcareous concretions, little or no bioturbation, and a benthic fauna which is sparse and entirely epifaunal.

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HYC Pyritic Shale Member: The HYC Pyritic Shale Member hosts the most significant mineralization in the Teena subbasin and throughout the Hot Spring-Emu subbasin. It has highly variable thickness (0–650 m) in the Teena subbasin and has been informally subdivided by Teck geologists into three distinct but completely gradational units: (1) the ...The oil shale is pyritic here too. . This section is to give some brief comparison, with the Lias oil and gas source rocks, the Shales-with-Beef, as seen on the coast at Lyme Regis, and the well-known Kimmeridge Clay oil shales. [more notes will be added]We examined the hypothesis that sulfide drives arsenic mobilization from pyritic black shale by a sulfide–arsenide exchange and oxidation reaction in which sulfide replaces arsenic in ...May 27, 2023 · Banded iron formations, pyritic black shale, and gold deposits : a re-evaluation. Banded iron formations (BIF) are predominantly Precambrian sedimentary rocks composed of alternating layers of iron-rich minerals (commonly hematite and magnetite, but also siderite, chlorite, and grunerite) and silica-rich minerals (e.g., quartz or chert) in ... Structural damage to buildings and other civil infrastructure by expansive pyritic shale is becoming increasingly prevalent as construction continues to expand into undeveloped areas as engineering knowledge of the damaging effects of building on or with this material remains inadequate. Establishing a database of case studies regarding ...Foundation Engineering. Pyrite oxidation and expansion in the New Albany black shale have caused serious foundation problems in numerous buildings and structures constructed in the black shale soil horizons in various parts of Kentucky. Pyrite oxidizes, causing various secondary sulfates to form when excavated shale or shale fill is exposed to ...Hanover Shale Member of Java Formation is uppermost unit in area containing fossils of the Frasnian Stage. Unit is 28 m thick and composed primarily of green-gray mudstone with accessory discrete thin black shale beds and zones of small calcareous, phosphatic and pyritic nodules.Expansive pyritic shales are found in black carbonaceous shales throughout the United States as well as in other countries, including Ireland, England, Norway, Canada, and Sweden.The Woodford Shale in northwestern Winkler County is an organic-rich, slightly dolomitic, silty, pyritic, highly-siliceous mudstone, averaging 55-75% silica, 10-30% detrital clay, and 5-9 wt% TOC. Thin-section analysis with a light petrographic microscope reveals three main faciesFigure 1.1 Expansive pyritic shale model as a step-wise progression during a typical construction project. (a) Elevated water table with overburden materials prior to construction. (b) Water table is lowered and overburden removed as part of the excavation process resulting in increased fracturing and oxidation of available pyrite (H1>H0).identify low-resistivity and chargeable sulfide masses, high-resistivity silicified-carbonitized zones, and pyritic alteration assemblages (Ward, 1966; Zonge and Hughes, 1991; Shalley and Harvey, 1992; Thomas and others, 1992). ... (such as shale pinchouts) that control fluid movement (fig. 1). Manto and chimney oreExpansive pyritic shales have caused untold amounts of damage to civil infrastructure throughout the world. The traditional characterization of potentially expansive pyritic shales only considers the presence of finely disseminated microscopic pyrite and references to case histories. The research presented in this paper shows that concentrated ...Elverhoi A (1977) Origin of framboidal pyrite in clayey Holocene sediments and in Jurassic black shale in the nortwestern part of the Barents Sea. Sedimentology 19: 591–595. ... Papunen H (1966) Framboidal texture of the pyritic layer found in a peat bog in SE Finland. Bull Comm Geol Finlande 222: 117–125. Google ScholarThe pyritic black shale facies is interpreted as being deposited in a brackish water, coastal marsh or swamp environment. Historically, the pyritic shale facies would be interpreted as part of the “outside shale” in the cyclothem model (Heckel, 1977). Figure 2.05: e-mail : ...the pyritic shale and calcareous limestone beds. Also, both the carbonate and sulfuric components need to interact in an aqueous environment, inferring that the dissolution of the carbonate from the calcium carbonate found within the limestone beds is occurring (Martin, 2008). The Mapleton Quarry, located in Huntingdonzones of reactive shale. The Sulfur Dioxide Task Group was established in order to apply the understanding of the investigations and research. This multi-disciplinary group developed the Pyritic Black Shale Procedures, which continue to be updated and are a critical part of the successful management of reactive shale at Mt Whaleback.Synsedimentary to Diagenetic Cu±Co Mineralization in Mesoproterozoic Pyritic Shale Driven by Magmatic-Hydrothermal Activity on the Edge of the Great Falls Tectonic Zone–Black Butte, Helena ...In a graben extending eastward from the center of the Mesoproterozoic Belt-Purcell Basin, Canada-USA (Helena Embayment; Figure 1), the Black Butte (formerly known as Sheep Creek) copper ± cobalt ± silver (⁠ Cu ± Co ± Ag ⁠) deposit is hosted by massive pyritic shale of the Newland Formation.zones of reactive shale. The Sulfur Dioxide Task Group was established in order to apply the understanding of the investigations and research. This multi-disciplinary group developed the Pyritic Black Shale Procedures, which continue to be updated and are a critical part of the successful management of reactive shale at Mt Whaleback.The difference between shale oil and shale gas is about flow mechanism of three-phase flow including oil, gas and water instead of two-phase of gas and water. Also, fluid properties input for reservoir model for shale oil is different from shale gas. The paper is structured starting with a methodology section including AHM framework and a ...Structural damage to buildings and other civil infrastructure by expansive pyritic shale is becoming increasingly prevalent as construction continues to expand into undeveloped areas as engineering knowledge of the damaging effects of building on or with this material remains inadequate. Establishing a database of case studies regarding ...The Carboniferous (Namurian) Clare Shale Formation (ShannonAs they grow, the new sulfate minerals pus investigation was designed in part to determine if expansive pyritic shale was a contributing factor to the distress observed at Old Airport Road. The preceding information is based on observations made during a visit to the site on May 1, 2003; conversations with Bill Dennison and Jack Hurlbert, P.E., of the City of Bristol The Mount McRae Shale comprises carbonaceous (TOC contents of up to 7%), pyritic shales that are interbedded with chert, carbonate turbidites, and banded iron-formation. Samples of the Mount McRae Shale are from the Mount Tom Price and Mount Whaleback (Mount Newman) iron-ore mines in the Hamersley Province. minerals. Testing of shale for sulfide content is commonly perfo To simulate shale softening, these shale samples were immersed in deionized (DI) water heated to 100 °C temperature and subjected to 8 MPa pressure in a laboratory reactor for 72 hours to ...May 27, 2023 · Banded iron formations, pyritic black shale, and gold deposits : a re-evaluation. Banded iron formations (BIF) are predominantly Precambrian sedimentary rocks composed of alternating layers of iron-rich minerals (commonly hematite and magnetite, but also siderite, chlorite, and grunerite) and silica-rich minerals (e.g., quartz or chert) in ... Here, the pyritic shale occurs as a 0.78 m-thick str

Sources of fluids. The origin of the fluids involved in the formation of orogenic gold deposits has been debated for a long time, mostly because deuterium and oxygen isotope data plot in the superposed fields of magmatic and metamorphic fluids (Ridley and Diamond Citation 2000).Recent developments in thermodynamic modelling …Black Shale. Black shale-related uranium mineralization consists of marine organic-rich shale or coal-rich pyritic shale, containing syn-sedimentary ...the pyritic shale and calcareous limestone beds. Also, both the carbonate and sulfuric components need to interact in an aqueous environment, inferring that the dissolution of the carbonate from the calcium carbonate found within the limestone beds is occurring (Martin, 2008). The Mapleton Quarry, located in HuntingdonHigh API gamma-ray, organic-pyritic shales, with some interbedded cherts, comprise the lower half of the Fayetteville (Fig. 9 A), which is the most hydrocarbon-productive. The Fayetteville is underlain by the Boone Formation (limestone and chert), Batesville Formation (sandstone), and Moorefield Formation (shale) ( Ratchford and …

the distruptive potential of pyritic shale fill (continued) figure 6. a one inch-wide crack with a three-quarter-inch vertical offset was documented in a concrete floor slab over pyritic shale fill. portions of the slab had heaved upward more than two inches over three years before the slab and underlying fill were removed.Black shales may also contain significant enrichments of gas or oil (gas shales, oil shales). Because of the continuous distribution of the natural gas or oil, they are considered to be ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Figure 1 illustrates an artifact, classif. Possible cause: The pyritic black shale facies is interpreted as being deposited in a .

The shale is variably pyritic and believed to be a source of metals into mineralizing fluids in northern England (Jones et al. 1994). The formation contains anomalously high concentrations of Se across the region (Parnell et al. 2016). A mean concentration of 21.5 ppm Se was determined from measurements of the shale from western Ireland to ...zones of reactive shale. The Sulfur Dioxide Task Group was established in order to apply the understanding of the investigations and research. This multi-disciplinary group developed the Pyritic Black Shale Procedures, which continue to be updated and are a critical part of the successful management of reactive shale at Mt Whaleback.

Vertical surfaces of shale exposed in trenches, disturbance by blasting, or fault zones that allow air penetration horizontally tend to enhance the rate of weathering and lead to very severe conditions. Fills of pyritic materials are particularly subject to accelerated weathering and heaving.Observational data and modelling reveal that oxidation of the concentrated pyritic zones produces microenvironments within the mudstone matrix that lead to the production of significant quantities of heave-inducing hydrous sulphates such as gypsum.... pyritic, calcareous dolomitic shale with abundant slump breccias; • An up to 50 m thick, highly carbonaceous, black cherty, shale and chert, which is an ...

... pyritic ash pulp densities 10 ... Comparative Investigation of destructive ground heave attributed to pyritic fill affecting new-build properties in the Dublin area of Ireland. Author links open ... and from Oslo in Norway (Moum and Rosenqvist, 1959). However, Canadian experience with Ordovician black ‘shales’ during the late 1960s reported by Quigley and Vogan (1970), Penner and … Shale is a sedimentary rock while slate is a metaJan 5, 2023 · Foundation Engineering. Pyrite oxidatio This reduction in Fe PY /Fe HR in the shale samples would affect the interpretation of the hydrogen sulphide availability in the palaeo-depositional environment in the BSB sample, changing it from euxinic (≫0.8) pre-experiment to ferruginous (≪0.7) post experiment (Poulton and Canfield, 2011), therefore this proxy may be less reliable in ...The mineral pyrite (/ ˈ p aɪ r aɪ t / PY-ryte), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S 2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral.. Pyrite cubic crystals on marl from Navajún, La Rioja, Spain (size: 95 by 78 millimetres [3.7 by 3.1 in], 512 grams [18.1 oz]; main crystal: 31 millimetres [1.2 in] on edge) Four pyritic shale samples, denoted as sh Synsedimentary to Diagenetic Cu±Co Mineralization in Mesoproterozoic Pyritic Shale Driven by Magmatic-Hydrothermal Activity on the Edge of the Great Falls Tectonic Zone–Black Butte, Helena ... The Mississippian rocks are widely distributed in the MississippiPetrology. Sample TS05 was collected fromThe conventional ore horizon in the McArthur River camp To stimulate pyrite oxidation in the selected shale samples, a soxhlet extractor was modified to continually drip distilled water over the shale chips contained within a cellulose thimble, before being collected in a flask, in a setup suggested by Pedro (1961) (Fig. 1).The condenser was left open, allowing exchange with the atmosphere; no attempt was made to …A maximum flooding surface in the HYC Pyritic Shale Member represents the most pyritic and organic-rich interval and can be developed as a black shale in sub- ... The HYC Pyritic Shale Member equivalent is relatively thin beneath the Rosie mineralization and is only weakly enriched in hydrothermal elements. Its … The New Albany Shale is composed of brownish-black carbon-r[Moreover, bedding-parallel permeability of the blIf pyritic shale or iron sulfide-bearing rock are present Black Shale. Black shale-related uranium mineralization consists of marine organic-rich shale or coal-rich pyritic shale, containing syn-sedimentary ...