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What is the chemical composition of shale?
Shale is primarily composed of clay minerals such as illite, kaolinite, and smectite, along with quartz, feldspar, and organic matter. It may also contain various accessory minerals depending on its specific geological history.
Is shale an element?
Shale is not an element. Shale is a type of sedimentary rock composed of clay-sized particles that have been compacted over time. It is made up of various minerals such as quartz, feldspar, and clay minerals.
How shale can be dissolved?
Shale can be dissolved by using acidizing techniques, where acid is pumped into the shale reservoir to dissolve the rock and create channels for increased oil and gas flow. Hydraulic fracturing, or fracking, is another method where high-pressure fluids are injected into the shale to create fractures and release trapped oil and gas. These techniques are commonly used in the oil and gas industry to extract resources from shale formations.
What is found on top of coal slate or shale?
== == == == == == The cap rock on a coal bed is usually a sedimentary rock, (i.e. shale sandstone etc.) but not always shale. Slate is a metamorphic rock, usually derived from shale that has been exposed to high pressures and temperatures over very long periods of time. Ways to tell the difference between slate and shale: Slate will have a smooth surface, and possible have light glare at a right angle. Shale will have a dull, sandy surface. Tap them against something hard. Slate will make a "clink" noise, almost like porcelain or ceramic, where shale will make a "thud" sound. Rub it against your teeth. Slate will be smooth, shale will be gritty. == == == ==
What is a rock that yields oil when heated?
Oil shale is a type of rock that contains kerogen, a precursor to oil. When heated, the kerogen in oil shale can be converted into oil and gas. This process is known as pyrolysis.
Is shale formed by physical or chemical weathering?
Shale is a clastic sedimentary rock formed of clay and silt sized eroded particles that are a result of both physical and chemical weathering. The clay minerals, however are the result of chemical weathering of feldspars.
What is the chemical formula for shale?
Shale is a rock not a chemical compound.
Is shale a chemical rock?
No, shale is clastic.
Is shale a biochemical rock?
Shale is a type of sedimentary rock that is formed from the compaction and cementation of clay or mud particles. It is not considered a biochemical rock because it is primarily composed of physical and chemical processes, rather than being formed from the accumulation of organic materials like limestone or coal.
What is the chemical formula of shale?
The chemical formula of shale is variable, as it is a sedimentary rock composed mainly of clay minerals, quartz, and other minerals. The general formula can be written as (Al,Si)3O10(OH)2, representing the presence of aluminosilicate clay minerals in shale.
What does shale change from?
fine-grained sediment
What causes shale to change into slate?
Shale changes into slate through a process called metamorphism, which involves heat, pressure, and chemical changes. The heat and pressure cause the minerals in the shale to recrystallize into a denser, more compact form, resulting in the fine-grained texture and foliation characteristic of slate. The composition of the original shale, as well as the intensity and duration of the metamorphic conditions, influence the final characteristics of the slate.
Can heat and pressure change the sedimentary shale into slate?
No
What causes weathering of shale?
The answer depends upon how much pyrite is present in the shale. In organic-rich shales with a lot of pyrite, the oxidation of pyrite creates acidity. This acidity then helps to chemically weather the shale in the bedrock. Certain bacteria may also help to speed up the process of pyrite oxidation. The answer is more difficult in organic-poor shales. some combination of physical weathering as well as proton- and ligand- promoted dissolution is involved. Fe-reducing bacteria may also help to dissolve Fe(III) from both silicate minerals as well as from iron oxyhydroxides like ferrihydrite, goethite and hematite.
What kind of physical weathering is common in Mica and Shale?
In Mica, exfoliation is a common form of physical weathering where thin sheets of mica peel off due to changes in pressure and temperature. In Shale, frost wedging is a common type of physical weathering where ice expands in cracks, causing the rock to break apart.
Why is acid making limestone fizz a chemical change?
When acid reacts with limestone, it causes a chemical reaction that results in the formation of new substances. This transformation is considered a chemical change because the original properties of the limestone and acid are altered, forming new chemical compounds. The fizzing is often a visual sign of this chemical reaction taking place.
What has the author Wayne E Brownell written?
Wayne E Brownell has written: 'Physical and chemical characterization of Devonian gas shales' -- subject(s): Analysis, Geology, Stratigraphic, Shale, Stratigraphic Geology
