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The generation of $${text{HCO}}_3^ - $$ during this process caused the precipitation and replacement of anhydrite by dolomite. A second product of BSR is the generation of H2S, resulting in the precipitation of Cu–Co sulphides from the mineralising fluids. Initial sulphide precipitation occurred along the rim of the pseudomorphs and ...
Well Sample No. Depth from to (m) Sample Material Test / Analysis thick (m) Effective Porosity % Geology description Big Flat No2 277209 1914.1 1914.4 Chunk MICP 0.30 8.2 Anhydrite and Dolomite Big Flat No2 277210 1914.4 1914.8 Chunk MICP 0.30 14.5 Silty Dolomite Big Flat No2 277211 1914.8 1915.4 Chunk MICP 0.61 19.1 Sugary dolomite, crumbly ...
The anhydrite dissolution pores in the Ordovician Majiagou Formation of southeastern Ordos Basin are commonly filled by minerals such as dolomite, calcite, pyrite, and quartz accounting for more ...
The objective of this study is to describe primary lithium production and to summarize the methods for combined mechanical and hydrometallurgical recycling of lithium-ion batteries (LIBs).
The dolomite reservoir in the 5th member of the Ordovician Majiagou Formation (M5) in the Ordos Basin can be divided into two types based on whether or not gypsum is present, i.e., gypsum-bearing and gypsum-free reservoirs. The gypsum-bearing reservoir mainly develops in the 1–4th sub-members of M5 and is composed of micritic to silt-sized dolomite. The main …
The optimal conditions for this process are an arid climate, consistent, unidirectional winds, low salt water permeability, and low rainfall. This evaporitic enrichment …
The dolomite phase with the lower amount of Mg may grow faster, but it may also be more soluble, the common scenario of the Ostwald step rule (Morse & Casey, 1988; Sibley, 1990). Stoichiometric dolomite has a lower standard free energy than calcium-rich dolomite (Carpenter, 1980), hence non-stoichiometry is an energetic drive for recrystallization.
Sedimentary rock - Evaporites, Deposits, Minerals: Evaporites are layered crystalline sedimentary rocks that form from brines generated in areas where the amount of water lost by evaporation exceeds the total amount of water from rainfall and influx via rivers and streams. The mineralogy of evaporite rocks is complex, with almost 100 varieties possible, but …
To study the mechanical and cracking modes of anhydrite rock under the freeze–thaw weathering process, the physico-mechanical characteristics and morphology evolutions of anhydrite samples were determined by a series of laboratory tests. Then, a numerical simulation model was established through the PFC2D program, and the types and …
Fluid flow across thermal gradients enhances reaction rates, and ignoring heat transport by 85 ppt brine reflux underestimates the extent of reflux dolomite by 25% and associated anhydrite by 90%.
In this study, we develop an electrochemical method to directly leach lithium from α-phase spodumene. We find the H 2 O 2 promoter can significantly reduce the leaching …
We systematically examine the study findings on various approaches for lithium recovery from spodumene and brine. Dense media separation (DMS) and froth flotation are …
basinward because of dolomite cementa-tion proximal to the brine source. Modified from Saller and Henderson (1998). 578 Dolomitization, Anhydrite Cementation, and Porosity Evolution in a Reflux System
The name "anhydrite" comes from the Greek and means "stone without water". Unlike the chemically related gypsum, anhydrite does not contain water. Anhydrite usually occurs in coarse-grained, massive aggregates, but can also form cubic and prismatic crystals up to about 20 cm in size. In its pure state, anhydrite is transparent and colorless.
Using McDermitt B clay containing 0.64% Li, several methods were applied to extract lithium including multiple-reagent roast—water leach, sulfur dioxide roast—water leach, …
Depending upon the desired product, different reagents may be applied to produce other commonly sold forms of lithium, such as lithium hydroxide, lithium chloride, lithium bromide, and butyl lithium. Once the lithium extraction process is complete, the remaining brine solution is returned to the underground reservoir.
In this study, we employed geochemical compositional analysis, strontium isotope analysis, and high-temperature and high-pressure experiments on the brine and its …
The adsorption of dissolved ions from one mineral onto the surface of another mineral induces a transformation in the surface of the adsorbing mineral, resulting in an augmented similarity between their surface properties [16].When the pH of apatite (Ca 5 (PO 4) 3 (F,Cl,OH)) and calcite (CaCO 3) pulp is less than 9.8, the CO 3 2-dissolved on calcite will …
Through the combination of GC/EI-MS analysis, in situ FTIR spectroscopy, and quantum chemical calculations, we were able to reveal the reaction mechanism of a …
Dolomitization is frequently associated with anhydrite precipitation, a process that commonly has a negative effect on reservoir quality. However, Lucia and Ruppel (1996) and Lucia (1999) noted that replacive nodular and poikilotopic anhydrite had only Reservoir Characteristics Average Gross 430 m Average Net 328 m Average Porosity ...
The coarse crystalline and saddle dolomite types float within a matrix of coarse, recrystallized anhydrite in the Basal Anhydrite. The 6180 isotopic values of the coarse, subhedral and euhedral dolomite types are more negative than the limpid dolomite, and the Sr-87/Sr-86 ratios are more radiogenic than typical marine dolomite of the Cretaceous.
Anhydrite, when dissolved, forms a solution of calcium sulfate, which at common temperatures and pressures is in equilibrium with the solid phase of gypsum, but not with anhydrite.
water. Lithium production from brine is currently dominated by traditional solar /evaporation pond-based lithium extraction. During this process, brine is pumped into vast ponds and allowed to …
Conference: The effect of anhydrite on oil production in dolomite reservoirs - Some early observations ... Preliminary indications suggest that more than 20% anhydrite in the reservoir will severely reduce porosity and permeability and cause higher than average water saturations. In addition, the spacing of new wells indicates that reservoir ...
Dedolomitization is a process in which dolomite crystals are partly or entirely replaced by calcite, but on a broader perspective ''dedolomitization reactions'' are usually described as ...
The role of lithium in chemical and nuclear industries could hardly be overestimated (Babenko et al., 2007).World lithium consumption in 2019 was estimated as ~58∙10 3 tons, with an increase of 18% compared with the previous year (National Minerals Information Center, 2020).Nevertheless, excluding the USA, worldwide lithium production in 2019 decreased by …
The objectives of this study were to prepare brucite-periclase material (BPM), and a cost-effective anhydrite-BPM sorbent (ABPM) for the removal of phosphate. The samples were characterized by X-Ray Diffraction (XRD), X-ray fluorescence (XRF), BET surface area, scanning electron microscope (SEM), and transmission electron microscope (TEM). The …
typical DLE process, lithium ions are selectively extracted from a brine while leaving most other salts in the brine solution [17]. This document will summarise the current types of DLE technology and consider their pros and cons, commercialization status, and technological readiness. 7.
Download scientific diagram | V P /V S, volume anhydrite (versus dolomite), and photoelectric logs plotted in depth for the Davey well (from Miller, 1992). Note the consistent tracking of V P /V ...
However, little is known about the frictional properties of these rocks, which are dominated by dolomite and anhydrite and differ from typical quartzofeldspathic rocks. Here, we report on laboratory experiments designed to illuminate friction constitutive properties and associated microstructures of anhydrite and dolomite fault rocks.
