On the other hand, it is important to take into account the effect of mineral inclusion on the material strength. For this purpose, the Hill's incremental approach has been adopted in Abou-Chakra Guéry et al. (2008) for the Callovo-Oxfordian argillite. In this model, the argillite was considered as a three-phase composite constituted by a clay matrix, calcite and quartz grains.
Magnetic grains embedded in a host mineral that imparts a long-range order represent an exception. Examples include exsolution of magnetic phases during rock cooling [162, 163] and magnetic ...
Overall, the alterations in mineralogical properties characterized by dissolution of unstable minerals and precipitation of secondary minerals could influence the physical and mechanical properties of the host rock. The physical property of carbonate-rich rocks was found to improve after CO 2 –brine–rock interaction. The porosity of all ...
Understanding these mineral properties is like holding a key to unlock the secrets of the Earth's crust. There are 23 most important mineral properties. The fundamental mineral properties are color, hardness, luster, cleavage, transparency, the morphology of chrystals, magnetism, and luminescence.
Evidently, the dissolution mechanism of CO 2 in brine and its subsequent reaction with rock minerals display notable variations across different rock types, resulting in diverse modifications to rock properties when CO 2 is injected. The extent of these changes is influenced by a range of factors, some of which can be controlled.
Mineralogy has been shown by numerous experimental studies to significantly influence the mechanical and elastic properties of reservoir rocks, such as sandstones and limestones (Arizzi et al...
The impact of CO 2-induced mineral reactions, specifically the CO 2-water-rock interactions, has been widely recognized for its potential to compromise the hydrogeological and mechanical properties of porous media, thereby deteriorating their integrity and mechanical characteristics.This raises concerns regarding the safety of numerous projects such as CO 2 …
The difference of mineral composition and cementation type was the key factor cause abnormal mechanical properties of rocks; ③Compared with clay minerals, the change of brittle mineral content ...
In CCS and EOR projects, changes in the hydraulic conductivity of reservoir rock are caused by mineral dissolution, which is highly dependent on its geometric structure (Liu and Mostaghimi, 2017, Mostaghimi et al., 2016), CO 2 /acid solution injection rate (Matter et al., 2016, Kang et al., 2002), and the reactivity of the host rock ...
Study on Rock Mechanical Properties and the Correlation of the Mechanical Parameters of Liuzuo Copper Mine
In comparison to clay minerals, the variation in the content of brittle minerals such as quartz, plagioclase, and siderite in the rock showed more sensitivity to the mechanics properties of the rock.
Download Citation | On Dec 29, 2023, Dun Wu and others published Influence of Mineral Composition on Rock Mechanics Properties and Brittleness Evaluation of Surrounding Rocks in Soft Coal Seams ...
Hawkins and McConnell (1992) carried out tests to determine the influence of the water content on the strength of 15 sandstones. They found that the relationship between water content and uniaxial compressive strength could be described by an exponential equation of the form: (2) σ c (w) = a e − b w + c where σ c (w) is the uniaxial compressive strength (MPa), …
In this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of sedimentary rocks (sandstone, shale, and …
Rock-forming minerals are minerals that are commonly found in the Earth's crust and are responsible for the formation of various types of rocks. These minerals make up the majority of the Earth's crust and are the building blocks of rocks, which are aggregates of minerals. Rock-forming minerals are typically silicate minerals, which are composed of silicon …
Rheological mechanical properties of the soft rock are affected significantly by its main physical characteristics-clay mineral. In this study, taking the mudstone on the roof and floor in four typical mining regions as the research object, firstly, the clay mineral characteristic was analyzed by the X-ray diffraction test. Subsequently, rheological mechanical properties of …
Complex fluid-rock interactions can occur during the injection of carbon dioxide (CO 2) into saline aquifers for sequestration, which may affect CO 2 injectivity and storage capacity. In this paper, a comprehensive reactive transport model is established to analyze salt precipitation, CO 2-water-rock geochemical reactions, and their effects on reservoir physical properties and …
At eroded volcanoes, the total thicknesses of dikes can be measured directly and indicate values ranging from a few centimeters to a few meters (Daniels et al., 2012;Harp & Valentine, 2018), while ...
While most rock-forming minerals become transparent in thin sections, ore minerals tend to remain opaque even when very thin. The examination of a mineral's edges can help differentiate between inherent opacity and the effect of thickness, offering clues to whether the mineral is an ore or rock-forming. 10. Special Properties
With the development of infrastructure construction, the proportion of tunnels in engineering projects was increasing year by year [1].Rock bolts and anchor cable had become the primary tunnel support technologies, and the anchoring materials play a crucial role in the engineering support structures [2], [3].Resin anchoring agents and cement anchoring agents …
The committee concludes that all minerals and mineral products could be or could become critical to some degree, depending on their importance and availability—in the sense that the chemical and physical properties they …
Mineral Magnetic Properties - Definition. Minerals are naturally occurring substances with a definite chemical composition. They have formed through geological processes over thousands of years. One fascinating feature of some minerals is their magnetic properties.These properties refer to the minerals' response to an external magnetic field.
The mechanical properties of rocks, including the elastic modulus and uniaxial compressive strength, play a crucial role in rock engineering design and analysis.
Fenestrate bryozoan in shale Gray shale Red shale. Shale is a laminated or fissile clastic sedimentary rock that composed of predominance of silt and clay other minerals, especially quartz and calcite.Characteristic properties of shale is breaks along thin laminae or parallel layering or bedding called fissility.
The relationship between elastic and rock properties is calibrated using well log measurements of elastic properties and petrophysical attributes estimated from measured logs, but the rock physics model is not generally integrated in the quantitative log interpretation workflow. ... elastic properties are also affected by the mineral volumes ...
A major geological risk factor for engineering and energy-related applications, such as CO 2 storage and unconventional hydrocarbon production, is the geomechanical integrity of mudrocks. The goal of this work is to better constrain the macroscopic mechanical properties resulting from microstructural components by investigating the effects of thermal maturity, …
Understanding microwave-assisted breakage and fracturing of hard rocks necessitates the characterisation of the dielectric properties of basic rock-forming minerals. In the literature, there is a significant discrepancy in the loss factors (i.e., the ability of minerals in absorbing microwave energy) of the gangue minerals due to the fact that different unsuitable …