Bedding-parallel calcite veins as a proxy for shale reservoir quality
Characteristics of bedding-parallel calcite veins. Out of 1760-m-thick cores and outcrop, a total of 120 m of rocks are observed to contain bedding-parallel calcite veins. The thickness of a single bedding-parallel calcite vein ranges from a few millimeters to ca. 5 cm. In the longitudinal sections of cores (9 cm in diameter), they appear as ...
The staged growth of bedding-parallel fibrous calcite veins, …
Abstract. Bedding-parallel fibrous calcite veins are commonly found in low-permeability strata rich in organic matter from various geological periods. Despite their …
Zeta potential of artificial and natural calcite in aqueous solution
Request PDF | On Dec 1, 2016, Dawoud Al Mahrouqi and others published Zeta potential of artificial and natural calcite in aqueous solution | Find, read and cite all the research you need on ...
Origin of bedding-parallel fibrous calcite veins in lacustrine …
@article{Luan2019OriginOB, title={Origin of bedding-parallel fibrous calcite veins in lacustrine black shale: A case study from Dongying Depression, Bohai Bay Basin}, author={Guoqiang Luan and Chunmei Dong and Karem. Azmy and Chengyan Lin and Cunfei Ma and Lihua Ren and Zhaoqun Zhu}, journal={Marine and Petroleum Geology}, …
Rapid ikaite (CaCO3·6H2O) crystallization in a man-made …
An ikaite to calcite transformation further implicates a significant crystal water release and volume loss of around 68 vol.%, which should result in settling of the …
Comparison of calcite and vaterite as precursors for CO3Ap artificial …
Carbonate apatite (CO 3 Ap) artificial bone is fabricated in an aqueous solution using calcium carbonate as a precursor. CO 3 Ap has attracted attention because it demonstrates high osteoconductivity and can replace a damaged bone based on the bone remodeling process. This study aims to compare vaterite and calcite, which are …
Calcite/aragonite-biocoated artificial coral reefs for marine …
calcium carbonate from seawater. Therefore, manufactured artificial coral reefs can be used for the. formation of "underwater gardens" in marine parks for the recre ational fishing and diving ...
(PDF) Studying the Relationship between Indigenous …
Studying the Relationship between Indigenous Microbial Communities, Urease Activity, and Calcite Precipitation in Artificial Mixes of Clay and Sand May 2021 DOI: 10.1061/9780784483428.014
Calcite® | Performance Water Products
Bed depth: 24-30 in. Freeboard: 50% of bed depth (min.) Backwash rate: 8-12 gpm/sq. ft. Backwash Bed Expansion: 35% of bed depth Service flow rate: 3-6 gpm/sq. ft. but may be modified to adapt to local conditions (back to top) FLOW RATE Service Flow Pressure Drop and Backwash Bed Expansion charts to be added later. Check back for updates. (back ...
Widespread development of bedding-parallel calcite veins …
1. Introduction. Bedding-parallel calcite veins (BPCVs) are commonly observed in organic matter-rich shales in sedimentary basins (Marshall, 1982; Durney and Ramsay, 1973; Al-Aasm et al., 1993; Rodrigues et al., 2009; Cobbold et al., 2013; Larmier et al., 2021).These types of veins have attracted attention not only for their unique …
Interactions between calcite precipitation (natural and artificial…
The annual SRP content decreased from 0.02 tons in 1996 to 0.01 tons in 1997 after beginning the artificial calcite precipitation in 1996. The decrease of the annual Chl-a concentration in 1998 on ...
Researchers have turned transparent calcite into …
Researchers have turned transparent calcite into artificial gold. Figure shows 3D reconstruction of the golden vaterite and the laser-induced heating of the spherulites. Credit: Tel Aviv ...
Studying the Relationship between Indigenous Microbial …
correlation between calcite precipitation, microbial community, and urease activity in different soils, nine artificial soil samples each weigh ing 1600g were prepared . Soil samples were
What is the need for gravel bed in downflow backwashing calcite tanks
Basically i am just replacing an old calcite tank (with the autotrol valve and no porthole. 13x54 inch 2.5 cubic foot) with the same capacity Vortech tank with port hole. So the autotrol valve is already setup for backwashing whatever capacity it needed to for neutralization (as configured by my tank servicing company).
Elastic and electrical properties of calcite …
These methods can be applied to making calcite-cemented artificial rocks that are with customized petrophysical and physical properties, closely ... and Xu, Q. (2016). Pore fluid evolution, distribution …
Limestone | Types, Properties, Composition, Formation, Uses
Limestone is a sedimentary rock primarily composed of calcium carbonate (CaCO3) in the form of mineral calcite or aragonite.It is one of the most common and widely distributed rocks on Earth, with a wide range of uses in various industries and natural settings. Limestone forms through the accumulation and compaction of marine …
Investigations on the effect of natural veined calcite on the
The natural state of the specimens before testing and their condition post-artificial accentuation of calcite ... L. J. Tensile strength of geological discontinuities …
Widespread development of bedding-parallel calcite
Bedding-parallel calcite veins (BPCVs) occur widely in Upper Cretaceous lacustrine shales of the Qingshankou Formation in the Northern Songliao Basin, China. Research on the formation processes and geological significance of BPCVs has focused on the sources of fluid, timing of formation, initiation, dilation and growth mechanisms, and …
Role of pressure solution in the formation of bedding-parallel calcite …
Bedding-parallel fibrous calcite veins in black shales (Cretaceous, southern UK) were investigated using a combined field, stable isotopic geochemistry, petrographic and crystallographic method to examine their formation mechanism. Calcite veins occur in all shale beds and are most abundant in the bituminous shales of the Chief Beef Beds.
Bedding-parallel fibrous veins (beef and cone-in-cone): …
Bedding-parallel layers of calcite beef (white) of various thicknesses within fissile shale (black) of Shales-with-Beef member, Charmouth Mudstone Fm, Charmouth. Calcite fibres are perpendicular to bedding, or nearly so. B. Calcite beef within tilted bedding, Lulworth Cove. Calcite fibres are somewhat oblique to the pole to bedding, …
[PDF] Zeta potential of artificial and natural calcite in …
Yassine Bentahar C. Hurel K. Draoui S. Khairoun N. Marmier. Environmental Science, Chemistry. Chemical Engineering Communications. 2021. Abstract In this study, the removal of methyl violet by natural clays was investigated. Rhassoul-clay, A-clay, E-clay, R-clay, and Y-clay were sampled from different sites in Morocco.
The origin of bedding-parallel fibrous calcite veins in the …
They mainly consist of fibrous calcite crystals, showing inward syntaxial growth from the vein margin to center with a median suture line. These veins may form at relatively shallow burial depth, where fluid overpressures would have created the vein space, resulting in incremental, displacive growth of bedding-parallel fibrous calcite …
A Fixed Bed Granular Calcite Column to Treat Hydrofluoric …
This study describes a new fluoride removal process using calcite that can efficiently treat hydrofluoric acid (HF) wastewater discharged from semiconductor industries. In the batch experiments using calcite and lime to treat artificial or real HF wastewater, the residual calcium concentration of calcite was lower than that of lime, and the pH value of calcite …
The staged growth of bedding-parallel fibrous calcite veins, …
Bedding-parallel fibrous calcite veins are commonly found in low-permeability strata rich in organic matter from various geological periods. Despite their importance in examining the fluid flow in sedimentary basins, dynamics of crustal permeability and mineralization, microbial mineralization, detection of early life …
Origin of bedding-parallel fibrous calcite veins in lacustrine …
1. Introduction. Fibrous calcite veins (including beef veins and cone-in-cone structures) parallel to bedding planes are common in some sedimentary basins, especially in black shales that are rich in organic matter and carbonates (Rodrigues et al., 2009; Tribovillard et al., 2018).They contain valuable information about the nature of fluid flow …
Principles of Calcite Dissolution in Human and …
Introduction. Human otoconia represent biominerals, consisting mainly of calcite (>90 wt.-%) and a small amount of organic material (<5 wt.-%) –.Owing to their inertia they provide adequate …
Origin of Bedding-Parallel Calcite Veins from …
Calcite veins, which developed parallel to the bedding, are widespread in laminated source rocks in the Eocene Dongying Depression. However, there is a lack of systematic description and classification of …
(PDF) Remineralization of permeate water by …
In a calcite contactor, water flo ws through a bed of calcite to dissolve carbonate minerals from the calcite packed bed until the pH nears equilibrium with the cal- cium carbonate [ 14 ].
Widespread bedding-parallel veins of fibrous calcite ('beef') …
Calcite fibres are perpendicular to bedding, or nearly so. B. Calcite beef within tilted bedding, Lulworth Cove. Calcite fibres are somewhat oblique to the pole to bedding, indicating component of bedding-parallel slip, top to East (right). C. Cone-in-cone structures in Shales-with-Beef member at foot of cliffs between Lyme Regis and …
The 12 Different Types Of Calcite (With Photos)
Updated January 12, 2024. Calcite provided by Weinrich Minerals. Calcite comes in many different forms, each with its own special features. Some great examples of calcite include Iceland spar, honey calcite, and feather calcite. Exploring the diverse types of calcite is like going on an adventure through the world of minerals.
