Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Hatcher Published This report presents the preliminary results of a study to determine the feasibility of dating Late Cretaceous bentonite beds in southwestern Manitoba using U-Pb zircon geochronology. Radiometric dating of bentonite beds in southwestern Manitoba in the s employed the K-Ar dating method, which had many inherent problems due to large analytical errors. View PDF. Save to Library. Create Alert. Launch Research Feed. Share This Paper.

Dating Bentonite

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The invention belongs to a method for producing broken bentonite particle cat litter, Prior art keywords: parts: raw materials: putting: put: cat litter; Prior art date.

Wyoming environmental regulators will investigate complaints that a bentonite mining company regularly violated rules and escaped proper oversight, Gov. He made his commitment in an Oct. Lawson sent the letters to the DEQ, Gov. Gordon and the federal Bureau of Land Management. They allege the overseeing agencies and the company, which sells most of its dried-clay products for cat litter, are in a regulatory mess that needs to be cleaned up.

Lawson alleged recurring violations of mining rules and regulations by Black Hills Bentonite at several sites in the state.

The Open Construction & Building Technology Journal

The invention belongs to the production method of cat litter, particularly the production method of a kind of broken bentonite clay particle cat. Along with the raising of people’s living standard, life interest and hobby also constantly increase, and in city, the pet such as cat and dog got more and more in the last few years, and the ight soil of pet is to environment, and people are very dislikes. Cat litter is exactly a kind of product of process pet dung, and cat litter product was without definite shape in the past, and intensity is low, and dust is large, and antibiotic property is undesirable, and eliminate the unusual smell difference, is not easy to cleaning.

In this study, low-cost bentonite was used for the preparation of hollow fibre ceramic (HFC) membrane. Bentonite powder was initially characterized by field.

Bentonite clays are widely used in a drilling operation and play a vital role as a drilling fluid. Bentonite clay mud performs several functions during the drilling operation and facilitates the drilling process. In this study, the locally available raw bentonite clays were investigated to evaluate its potential use as a mud for borehole drilling operation after its improvement with the additives.

Rheological properties such as plastic viscosity, yield point and gel strength were evaluated by using a viscometer and filtrate loss test was performed by using filter press on both locally available raw bentonite clays and the commercial bentonite named as Mill gel. From the test results obtained for the up gradation of clays with the different beneficiating materials, the drastic increase in the plastic viscosity, yield point and gel strength has been observed.

It shows that Xanthum gum produced better results for the improvement of rheological properties of such clays. Carboxymethyl cellulose and starch were used as additives and it has been observed that carboxymethyl cellulose has improved both viscosity and filtrate loss control, whereas starch muds have the best filtration control properties. Improved bentonite clays have rheological and filtration characteristics that have satisfied American Petroleum Institute specification at optimum conditions of clay.

It was concluded that improved clays are the suitable material for the drilling operations and suitable to substitute commercial bentonite. The editors are so kind and professional to send us the reviewers’ feedback in time.

CN104770306A – Method for producing broken bentonite particle cat litter – Google Patents

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40Ar/39Ar dating of a bentonite associated with a cold methane seep deposit in the upper Campanian Baculites compressus Zone of the Pierre Shale in South.

Journal Impact Factor contributing items Contact Subscription. Current issue. Online first. Notes to Authors Frequently Asked Questions. Matin Hajjizadeh 1. Shahriar Ghammamy 2. Hossein Ganjidoust 3.

Bentonite Performance Minerals LLC

Treatment of acid mine drainage using un-activated bentonite and limestone. Characterization and an investigation on ceramic properties of selected continental clay materials. Showing items 1 – 3 of 3 Your selections: Bentonite.

You can think of the mask as a shampoo and conditioner in one. To date, there are few scientific studies to support the benefits of bentonite clay.

GSA Bulletin ; 4 : — Five evolved high-potassium glauconitic micas from cm below the bentonite yield a Rb-Sr isochron date of Six evolved high-potassium glauconitic micas from cm above the bentonite yield a Rb-Sr date of Agreement of Rb-Sr and K-Ar biotite dates in the bentonite with Rb-Sr and K-Ar glauconitic mica dates in the underlying and overlying carbonate suggests that carefully selected, evolved glauconitic mica that has neither been deeply buried nor experienced cation exchange with ground water can provide reliable isotopic ages and constraints for the standard geologic time scale.

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Bentonite clay

Effective date : This invention relates to a process for treating a bentonite and a bentonite treated by the process that is suitable for use as a softener in soaps, laundry bars, and other detergent compositions for fabrics. Bentonites which are colloidal aluminium silicates have previously been proposed as softeners for detergents based on their swelling and ion exchange properties.

on swelling pressure and swelling strain of bentonite, using two kinds of bentonite ore whose generation dates are different respectively.

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Leaching of rare earth elements from bentonite clay. Due to increasing concerns of global rare earth element shortfalls in the near future, possible alternative sources of rare earth elements have recently become of economic interest. One such alternative is decanting acid mine water originating primarily from abandoned old mines in the Witwatersrand region of the Republic of South Africa. In this study, a novel way of rare earth element removal from the acid mine drainage was employed, making use of bentonite clay, which has very good adsorbent properties, as a rare earth element carrier material.

The process can be economically viable only, if the elements can be selectively removed from the bentonite clay carrier material so as to yield reusable clay.

von Rad, Ulrich; Thurow, Juergen W (): (Table 1) Bentonite and Date/Time Start: T * Date/Time End: T Minimum.

Thus, significant radiogenic argon was retained by fine-grained detrital illite, even in shale samples very near the igneous contact. This is a preview of subscription content, log in to check access. Rent this article via DeepDyve. Aronson, J. Google Scholar. Radiogenic argon evidence: Geol. Bonhomme, M. Burtner, R. Clauer, N.

Remediation of acid mine drainage using magnesite and its bentonite clay composite

Potassium—argon dating , abbreviated K—Ar dating , is a radiometric dating method used in geochronology and archaeology. It is based on measurement of the product of the radioactive decay of an isotope of potassium K into argon Ar. Potassium is a common element found in many materials, such as micas , clay minerals , tephra , and evaporites.

In these materials, the decay product 40 Ar is able to escape the liquid molten rock, but starts to accumulate when the rock solidifies recrystallizes. The amount of argon sublimation that occurs is a function of the purity of the sample, the composition of the mother material, and a number of other factors.

SHRIMP zircon U-Pb dating from K-​bentonite in the top of Ordovician of Wangjiawan Section, Yichang, Hubei,. China​.

The aim of this work was to compare the influence of organocations with different length of alkylammonium chain on the structural stability of clays towards mechanochemical treatment. The products were investigated by X-ray diffraction analysis, thermal analysis, scanning electron microscopy and energy dispersive X-ray analysis. The long-chain organic cations apparently enhance the structural stability of bentonite during high-energy grinding. Sign in Sign up.

Advanced Search Help. Sign in Sign up My Content You’re not logged in. Journal of Thermal Analysis and Calorimetry. Influence of organic surfactants on structural stability of mechanochemically treated bentonite.


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