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Journal articles on the topic 'Barites'

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1

Deng, Ning, Andrew G. Stack, Juliane Weber, Bo Cao, James J. De Yoreo, and Yandi Hu. "Organic–mineral interfacial chemistry drives heterogeneous nucleation of Sr-rich (Bax, Sr1−x)SO4 from undersaturated solution." Proceedings of the National Academy of Sciences 116, no. 27 (2019): 13221–26. http://dx.doi.org/10.1073/pnas.1821065116.

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Sr-bearing marine barite [(Bax, Sr1−x)SO4] cycling has been widely used to reconstruct geochemical evolutions of paleoenvironments. However, an understanding of barite precipitation in the ocean, which is globally undersaturated with respect to barite, is missing. Moreover, the reason for the occurrence of higher Sr content in marine barites than expected for classical crystal growth processes remains unknown. Field data analyses suggested that organic molecules may regulate the formation and composition of marine barites; however, the specific organic–mineral interactions are unclear. Using i
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2

Astakhova, N. V. "Hydrothermal Ore Genesis in the Sea of Japan." Russian Geology and Geophysics 62, no. 9 (2021): 977–86. http://dx.doi.org/10.2113/rgg20194150.

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Abstract —The Sea of Japan is a tectonically active region with rift-related destruction of the Earth’s crust and numerous volcanic edifices on the seafloor. Since the 1970s, numerous zones with ferromanganese crusts (FMCs) and phosphorite and barite ore occurrences have been discovered during the repeated expeditions of the Pacific Oceanological Institute, Vladivostok. Analysis of the distribution of these ore occurrences showed that all of them are confined to tectonically active zones of the seafloor: submarine volcanoes, tectonic scarps, or fault zones. In some zones, phosphorites occur togethe
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3

Dimova, Maya, Gerard Panczer, and Michael Gaft. "Spectroscopic study of barite from the Kremikovtsi Deposit (Bulgaria) with implication for its origin." Annales g?ologiques de la Peninsule balkanique, no. 67 (2006): 101–8. http://dx.doi.org/10.2298/gabp0667101d.

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Different genetic types (endogene and supergene) of barite from the Kremikovtsi deposit (Bulgaria) were studied by Laser-induced time-resolved luminescence (LITRL), Infrared (IR) and Raman spectroscopy. The IR spectra of the endogene barites are quite similar to those reported in the literature and do not show appreciable differences among them. The IR spectra of the supergene barites are almost identical to those of the endogene ones in respect to the positions of the vibrational modes ?1, ?2 and ?4 of SO4 2 except for a shift of 3 cm-1 for the ? 3 band. They displayed a presence of additiona
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4

Soriano, M. C. Osácar, J. Besteiro Ráfales, and J. González Martínez. "X-Ray Diffraction Analysis of Strontium in Barites." Powder Diffraction 6, no. 2 (1991): 70–73. http://dx.doi.org/10.1017/s0885715600017024.

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AbstractA procedure for Sr-analysis of vein barites by X-ray powder diffraction is described. It is based on the measurement of barite d210 spacing change referenced to NaCl as the internal standard. This procedure covers a range of Sr isomorphic substitution of 0 to 12% SrSO4. Comparison with other values, derived from literature data, shows they are in good agreement with the experimental ones. Statistical analysis of the results yields a maximum absolute error of ±0.50 %SrSO4 in Sr determination. This measurement error proves to be acceptable for most studies of barite in mineral deposits.
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5

Adubok, A. .S, and E.G Imoekparia. "TRACE ELEMENTS DISTRIBUTION AND ENRICHMENT IN SOILS OVERLYING BARITES VEIN DEPOSITS IN THE PAYA DISTRICT, MIDDLE BENUE TROUGH, NIGERIA." Continental J. Earth Sciences 3 (July 7, 2008): 22–27. https://doi.org/10.5281/zenodo.824296.

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<strong>The Paya Barites deposit typifies the numerous small (hidden) and uninvestigated barites mineralization that abound within the Benue Trough, Nigeria. Geological field studies and geochemical analysis of soils around the mineralized ridge was carried in order understand the general structural trend as well as assessing the trace elements distribution. Results of field geological investigations indicate Barites mineralization in vein systems, occurring as infillings in joints and fractures within an East – West trending ridge. Trace element geochemistry of soils overlying these veins rev
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6

Otoijamun, Itohan, Moses Kigozi, Sikiru Ottan Abdulraman, Adelana Rasak Adetunji, and Azikiwe Peter Onwualu. "Fostering the Sustainability of Artisanal and Small-Scale Mining (ASM) of Barite in Nasarawa State, Nigeria." Sustainability 13, no. 11 (2021): 5917. http://dx.doi.org/10.3390/su13115917.

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The exploration and mining of Nigerian barite are primarily by artisanal and small-scale miners (ASM) whose operations are characterized by poor productivity. As a result, the quantity and quality of barites produced do not satisfy the nation’s oil sector demands and other industries that require the mineral. This situation leads to massive importation of the mineral with negative impact on the country’s drive toward increasing the contribution of solid minerals to the gross domestic product (GDP). This study reviews the existing policies and government interventions on ASM of Nigerian barite;
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7

Li, B., J. T. Lee, and O. K. Manuel. "Anomalous 131Xe in barites." Earth and Planetary Science Letters 123, no. 1-3 (1994): 71–79. http://dx.doi.org/10.1016/0012-821x(94)90258-5.

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8

Wang, Chunyao, Li Zhou, Shuai Zhang, et al. "Morphology of Barite Synthesized by In-Situ Mixing of Na2SO4 and BaCl2 Solutions at 200 °C." Crystals 11, no. 8 (2021): 962. http://dx.doi.org/10.3390/cryst11080962.

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Barite is an abundant sulfate mineral in nature. Especially, the variety of morphologies of barite is often driven by the mixing of Ba-bearing hydrothermal fluid and sulfate-bearing seawater around hydrothermal chimneys. In order to better understand the factors affecting the morphology and precipitation mechanism(s) of barite in seafloor hydrothermal systems, we synthesized barite by a new method of in-situ mixing of BaCl2 and Na2SO4 solutions at 200 °C while varying Ba concentrations and ratios of Ba2+/SO42−, and at room temperature for comparison. The results show that barite synthesized by
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9

Cansu, Zeynep, Hüseyin Öztürk, and Nurullah Hanilçi. "Barite Deposits of Türkiye: A Review." Minerals 15, no. 7 (2025): 692. https://doi.org/10.3390/min15070692.

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Türkiye hosts a wide variety of barite deposits that can be broadly classified into two major groups based on their tectonic settings: magmatism-associated and passive margin-hosted deposits. The magmatism-associated deposits include Kızılcaören (F + Ba + REE + Th, Beylikova–Eskişehir), Kirazören (Bulancak–Giresun), and Karacaören (Mesudiye–Ordu). The Kızılcaören deposit formed in relation to the emplacement of a late Oligocene carbonatitic sill, while the Kirazören and Karacaören deposits are associated with the Cretaceous Pontide magmatic arc. Passive margin-hosted deposits occur within vari
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10

Muller, Élodie, Pascal Philippot, Claire Rollion-Bard, and Pierre Cartigny. "Multiple sulfur-isotope signatures in Archean sulfates and their implications for the chemistry and dynamics of the early atmosphere." Proceedings of the National Academy of Sciences 113, no. 27 (2016): 7432–37. http://dx.doi.org/10.1073/pnas.1520522113.

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Sulfur isotopic anomalies (∆33S and ∆36S) have been used to trace the redox evolution of the Precambrian atmosphere and to document the photochemistry and transport properties of the modern atmosphere. Recently, it was shown that modern sulfate aerosols formed in an oxidizing atmosphere can display important isotopic anomalies, thus questioning the significance of Archean sulfate deposits. Here, we performed in situ 4S-isotope measurements of 3.2- and 3.5-billion-year (Ga)-old sulfates. This in situ approach allows us to investigate the diversity of Archean sulfate texture and mineralogy with
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11

Li, Shu Cai, Han Peng Wang, Qiang Yong Zhang, and Yong Li. "New Type Geo-Mechanical Similar Material Experiments Research and Its Application." Key Engineering Materials 326-328 (December 2006): 1801–4. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1801.

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It is very important to choose a similar material which simulates rock mass correctly in geo-mechanics model test. In this paper, we introduce similar material research status and analyze the principle of selecting and compounding. According to the experiences of similar material research, we develop a new similar material (we call it iron barites sand cementation material, abbreviate IBSCM) through hundreds of compounding experiment. This similar material is made up of iron ore powder, barites powder, sand, rosin, alcohol and gypsum powder. Iron ore powder, barites powder and sand are main ma
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12

Jirásek, Jakub, Zdeněk Dolníček, Dalibor Matýsek, and Tomáš Urubek. "Genetic aspects of barite mineralization related to rocks of the teschenite association in the Silesian Unit, Outer Western Carpathians, Czech Republic." Geologica Carpathica 68, no. 2 (2017): 119–29. http://dx.doi.org/10.1515/geoca-2017-0010.

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AbstractBarite is a relatively uncommon phase in vein and amygdule mineralizations hosted by igneous rocks of the teschenite association in the Silesian Unit (Western Carpathians). In macroscopically observable sizes, it has been reported from 10 sites situated only in the Czech part of the Silesian Unit. Microscopic barite produced by the hydrothermal alteration of rock matrix and also by the supergene processes is more abundant. We examined four samples of barite by mineralogical and geochemical methods. Electron microprobe analyses proved pure barites with up to 0.038 apfu Sr and without re
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13

Sun, Nan, Xu-Qi Chen, Lan-Lan Tian, and Fang Huang. "Determining 88Sr/86Sr of barite using the Na2CO3 exchange method." Journal of Analytical Atomic Spectrometry 37, no. 2 (2022): 390–98. http://dx.doi.org/10.1039/d1ja00400j.

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14

Askarova, N. S., V. S. Portnov, G. G. Blyalova, R. K. Madisheva, and V. V. Dyakonov. "Geology and minerageny of the Bestobe deposit (Central Kazakhstan)." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 321, no. 2 (2022): 22–30. http://dx.doi.org/10.31643/2022/6445.14.

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Polygenic stratiform deposits are the largest in the world in terms of barite and manganese reserves, as well as lead and zinc reserves. In the mineral resource complex of the Republic of Kazakhstan, they are of great importance and are distinguished as an independent genetic Atasu type. In the article, the deposits of the Zhailma graben-syncline in a large riftogenic structure are considered as a reference for the Atasu type. The geological structure of the Bestobe stratiform polymetallic deposit located in the eastern part of the Zhailma synclinorium is presented. The stratigraphy of ore for
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15

Fadayini, O., N.A. Amenaghawon, and E.O. Aluyor. "Physico-Chemical and Mineralogical Characterization of Barite-Bearing Ores from Selected Locations in Nigeria." Nigerian Research Journal of Engineering and Environmental Sciences 7, no. 1 (2022): 125–35. https://doi.org/10.5281/zenodo.6722193.

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<em>Nigeria is naturally endowed with solid mineral reserves and must do everything necessary to harness and maximize these resources and unlock their potential. Hence, the research on Nigerian barites was examined in this study.&nbsp; Barite-bearing ores were sourced from Azare (Bauchi State), Obi (Nasarawa State), and Obubra (Cross River State) in Nigeria and characterized to determine their properties. The physico-chemical characteristics revealed specific gravity of 4.02, 4.14, and 3.95, moisture content of 0.94%, 0.68%, and 0.57%, density of 4.60 g/cm<sup>3</sup>, 4.82 g/cm<sup>3</sup>, a
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16

Kravchishina, Marina D., Vsevolod Yu Prokofiev, Olga M. Dara, et al. "Fluid Inclusion Studies of Barite Disseminated in Hydrothermal Sediments of the Mohns Ridge." Minerals 13, no. 9 (2023): 1117. http://dx.doi.org/10.3390/min13091117.

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This article discusses the results of a fluid inclusion studies in barite collected at the Jan Mayen vent field area (Troll Wall and Perle and Bruse) and Loki’s Castle vent field on the Mohns Ridge segment of the Arctic Mid-Ocean Ridge. Three mafic-hosted volcanogenic massive sulfide deposits were examined within the active vent fields that adequately correspond to the geological settings of ultraslow-spreading ridges and P–T conditions. Hydrothermal sediments were investigated to determine the temperature and salinity of the fluids responsible for barite precipitation. The hydrothermal origin
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17

Sato, Fumihiro, Shin Toyoda, Debabrata Banerjee, and Jun-Ichiro Ishibashi. "Thermal stability of ESR signals in hydrothermal barites." Radiation Measurements 46, no. 9 (2011): 866–70. http://dx.doi.org/10.1016/j.radmeas.2011.05.007.

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18

Rajabi, Abdorrahman, Pouria Mahmoodi, Pura Alfonso, et al. "Barite Replacement as a Key Factor in the Genesis of Sediment-Hosted Zn-Pb±Ba and Barite-Sulfide Deposits: Ore Fluids and Isotope (S and Sr) Signatures from Sediment-Hosted Zn-Pb±Ba Deposits of Iran." Minerals 14, no. 7 (2024): 671. http://dx.doi.org/10.3390/min14070671.

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Iran hosts more than 350 Precambrian to Cenozoic sediment-hosted Zn-Pb±Ba and barite-sulfide deposits, including shale-hosted massive sulfide (SHMS, also called SEDEX) and Irish-type and Mississippi Valley-type (MVT) mineralization, and barite is a common mineral in these deposits. In the SHMS deposits, barite is typically found as fine-grained disseminations in thin laminae. In these deposits, the sulfide laminae often occur as diagenetic replacements and as bands containing authigenic and diagenetic barite and pyrite framboids. In the Irish-type Zn-Pb-Ba and stratabound barite-sulfide deposi
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19

Ilozurike Duru, Ugochukwu, Anthony Kerunwa, Ifeanyi Omeokwe, Nnaemeka Uwaezuoke, and Boniface Obah. "Suitability of Some Nigerian Barites in Drilling Fluid Formulations." Petroleum Science and Engineering 3, no. 2 (2019): 46. http://dx.doi.org/10.11648/j.pse.20190302.13.

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20

Jewell, Paul W., and Robert F. Stallard. "Geochemistry and Paleoceanographic Setting of Central Nevada Bedded Barites." Journal of Geology 99, no. 2 (1991): 151–70. http://dx.doi.org/10.1086/629482.

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21

Otoijamun, Itohan, Moses Kigozi, Adelana Rasak Adetunji, and Peter Azikiwe Onwualu. "Characterization and Suitability of Nigerian Barites for Different Industrial Applications." Minerals 11, no. 4 (2021): 360. http://dx.doi.org/10.3390/min11040360.

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This work aimed to characterize barite samples from selected different locations in Nigeria and determine their suitability for various industrial applications. The properties determined include mineralogy, chemical composition, morphology, functional groups, and specific gravity. Samples were obtained from ten locations in Nasarawa and Taraba states as well as a standard working sample (WS) obtained from a drilling site. The samples were characterized using scanning electron microscope and energy dispersive X-ray (SEM-EDX), Fourier infrared analysis (FTIR), and X-ray diffraction (XRD). Specif
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22

Almayrac, Matthieu G., Michael W. Broadley, David V. Bekaert, Axel Hofmann, and Bernard Marty. "Possible discontinuous evolution of atmospheric xenon suggested by Archean barites." Chemical Geology 581 (October 2021): 120405. http://dx.doi.org/10.1016/j.chemgeo.2021.120405.

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23

Agarwal, Jyotsna. "Effect of Nature of Coal on Carbothermal Reduction of Barites." Oriental Journal of Chemistry 30, no. 3 (2014): 1221–25. http://dx.doi.org/10.13005/ojc/300337.

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24

Ripin, A., F. Mohamed, T. F. Choo, M. R. Yusof, S. Hashim, and S. K. Ghoshal. "X-ray shielding behaviour of kaolin derived mullite-barites ceramic." Radiation Physics and Chemistry 144 (March 2018): 63–68. http://dx.doi.org/10.1016/j.radphyschem.2017.11.014.

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25

Crockford, Peter W., Boswell A. Wing, Adina Paytan, et al. "Barium-isotopic constraints on the origin of post-Marinoan barites." Earth and Planetary Science Letters 519 (August 2019): 234–44. http://dx.doi.org/10.1016/j.epsl.2019.05.018.

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26

Jóźwiak-Niedźwiedzka, Daria, Michał Glinicki, Karolina Gibas, and Tomasz Baran. "Alkali-Silica Reactivity of High Density Aggregates for Radiation Shielding Concrete." Materials 11, no. 11 (2018): 2284. http://dx.doi.org/10.3390/ma11112284.

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Long-term exposure of concrete to nuclear reactor environments may enhance the ageing phenomena. An investigation concerning a possible deleterious alkali-silica reaction (ASR) in concrete containing high-density aggregates is presented in this paper. The scope of this investigation was limited to heavy aggregates that could be used for the construction of the first Polish nuclear power plant (NPP). Five different high-density aggregates were selected and tested: three barites, magnetite, and hematite. Mineralogical analysis was conducted using thin section microscopic observation in transmitt
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27

Fakinou, M., I. E. Stamatelatos, and J. Kalef-Ezra. "Neutrons along the labyrinth of high energy medical accelerators: Effect of wall materials." HNPS Proceedings 21 (March 8, 2019): 169. http://dx.doi.org/10.12681/hnps.2026.

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Neutron streaming along the labyrinth of a generic bunker of an 18MV medical accelerator was evaluated. Monte Carlo simulations using MCNP code were performed to calculate neutron ambient dose equivalent along the labyrinth. The effect of plain, borated and barites concrete wall material, as well as borated concrete and plywood (Celotex), as neutron absorbing wall liners, was examined. The results of the study suggest that plywood can provide a cost effective material to attenuate neutron streaming along the labyrinth.
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28

Hoering, Thomas C. "The Isotopic Composition of Bedded Barites from the Archeann of Southern India." Journal Geological Society of India 34, no. 5 (1989): 461–66. http://dx.doi.org/10.17491/jgsi/1989/340503.

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29

Sreenath, L. "Assessment of Concrete Strength Using Inexpensive Locally Available Materials -Flyash and Microfine Barites in Place of Concrete in Application of Building, Dam, Road Etc." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 10 (2024): 1–9. http://dx.doi.org/10.55041/ijsrem37907.

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Concrete is the most versatile material for all types of construction works and has been used for innumerable construction works either, as plain concrete or as reinforced cement concrete or as precise concrete or prestressed concrete or in many other forms. Except water, no other material is being used in such large quantities About 12,000 million tones of concrete is used globally. The various ingredients of concrete are Cement, Water, Fine Aggregate and Coarse Aggregate. Ordinary Portland Cement (OPC) is the chief constituent of concrete. The production of Portland cement contributes about
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30

Maynard, J. B., John Morton, E. L. Valdes-Nodarse, and A. Diaz-Carmona. "Sr isotopes of bedded barites; guide to distinguishing basins with Pb-Zn mineralization." Economic Geology 90, no. 7 (1995): 2058–64. http://dx.doi.org/10.2113/gsecongeo.90.7.2058.

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31

Tian, Lan-Lan, Wei Wei, Lin-Hui Dong, Songqi Pan, Zhenhua Jing, and Fang Huang. "Diagenetic effect on barium isotope compositions of barites in the lower Cambrian successions." Chemical Geology 635 (September 2023): 121631. http://dx.doi.org/10.1016/j.chemgeo.2023.121631.

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32

Dill, H., and C. Carl. "Sr isotope variation in vein barites from the NE Bavarian Basement: Relevance for the source of elements and genesis of unconformity-related barite deposits." Mineralogy and Petrology 36, no. 1 (1987): 27–39. http://dx.doi.org/10.1007/bf01164367.

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33

Tian, Lan-Lan, Ying-Zeng Gong, Wei Wei, Jin-Ting Kang, Hui-Min Yu, and Fang Huang. "Rapid determination of Ba isotope compositions for barites using a H2O-extraction method and MC-ICP-MS." Journal of Analytical Atomic Spectrometry 35, no. 8 (2020): 1566–73. http://dx.doi.org/10.1039/d0ja00078g.

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34

Torres, M. E., H. J. Brumsack, G. Bohrmann, and K. C. Emeis. "Barite fronts in continental margin sediments: a new look at barium remobilization in the zone of sulfate reduction and formation of heavy barites in diagenetic fronts." Chemical Geology 127, no. 1-3 (1996): 125–39. http://dx.doi.org/10.1016/0009-2541(95)00090-9.

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35

Whitford, David J., M. J. Korsch, and M. Solomon. "Strontium isotope studies of barites; implications for the origin of base metal mineralization in Tasmania." Economic Geology 87, no. 3 (1992): 953–59. http://dx.doi.org/10.2113/gsecongeo.87.3.953.

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36

Torres, Marta E., Gerhard Bohrmann, and Erwin Suess. "Authigenic barites and fluxes of barium associated with fluid seeps in the Peru subduction zone." Earth and Planetary Science Letters 144, no. 3-4 (1996): 469–81. http://dx.doi.org/10.1016/s0012-821x(96)00163-x.

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37

Jewell, Paul W. "Paleoredox Conditions and the Origin of Bedded Barites along the Late Devonian North American Continental Margin." Journal of Geology 102, no. 2 (1994): 151–64. http://dx.doi.org/10.1086/629660.

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38

Agarwal, Jyotsna. "Comparative study of catalytic action of potassium nitrate and feldspar for the carbothermal reduction of barites." Materials Today: Proceedings 4, no. 2 (2017): 104–11. http://dx.doi.org/10.1016/j.matpr.2017.01.002.

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39

Balaji, M. A. Sai, and K. Kalaichelvan. "Optimization of Organic Fibres%[Kevlar/Arobocel/Acrylic] in NAO Brake Pad Application and its Effect on Thermal Stability & Friction Characteristics." Key Engineering Materials 531-532 (December 2012): 8–12. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.8.

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Organic fibres (Kevlar/ Arbocel / Acrylic) have good thermal stability, higher surface area and bulk density. The optimization of organic fibres percentage for thermal behaviour is considered using TGA. The temperature raise during brake application will be between 150-4000 C and this temperature zone is very critical to determine the fade characteristics during friction testing. Hence, three different friction composites are developed with the same formulation varying only the Kevlar, Arbocel and Acrylic fibres which are compensated by the inert filler namely the barites and are designated as
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40

Ola Peter Sunday, Bamisaiye Oluseyi Adunola, and Idowu Thaddeus. "Geochemistry, Mineralogy and Petrogenesis of the Vein-Type Barites of Some Portions of the Benue Trough, Nigeria." Lithology and Mineral Resources 55, no. 6 (2020): 528–37. http://dx.doi.org/10.1134/s0024490220060085.

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41

Bao, Huiming, Douglas Rumble, and Donald R. Lowe. "The five stable isotope compositions of Fig Tree barites: Implications on sulfur cycle in ca. 3.2Ga oceans." Geochimica et Cosmochimica Acta 71, no. 20 (2007): 4868–79. http://dx.doi.org/10.1016/j.gca.2007.05.032.

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42

Afolayan, David Oluwasegun, Adelana Rasak Adetunji, Azikiwe Peter Onwualu, Oghenerume Ogolo, and Richard Kwasi Amankwah. "Characterization of barite reserves in Nigeria for use as weighting agent in drilling fluid." Journal of Petroleum Exploration and Production Technology 11, no. 5 (2021): 2157–78. http://dx.doi.org/10.1007/s13202-021-01164-8.

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AbstractSuccessful drilling operations are dependent on the properties of the drilling fluid used to drill wells. Barite is used as a weighting agent during the preparation of drilling fluid. Over the years, oil and gas industry in Nigeria has been depending mainly on imported barite for drilling operations, whereas the country has huge deposits of barite. There is the need to assess the properties of the locally sourced barite for their suitability in drilling fluid formulation. This study presents the local processing methods of barite and examines the crude and on-the-site processed barite’
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43

Ekhwan Razali, Mohd, Roszilah Hamid, and Yusof Abdullah. "Mechanical Properties and Thermal Neutron Absorption of Heavyweight Hematite Aggregate Concrete for Radiation Shielding." International Journal of Engineering & Technology 8, no. 1.2 (2019): 123–30. http://dx.doi.org/10.14419/ijet.v8i1.2.24883.

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Heavyweight aggregate concrete (HWAC) is the most widely used material as radiation shielding for nuclear reactors. The density of HWAC is increased through the use of heavy natural aggregates such as barites, hematite and magnetite. This study determines the density of HWAC with hematite aggregate replacing granite at 0%, 10%, 20%, 30%, 40% and 50%, its compressive strength and thermal neutron absorption of 1 MeV fast neutrons. The physical properties of hematite which include gradation, specific gravity, water absorption and loose unit weight are determined. The chemical composition of hemat
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44

Roerdink, Desiree L., Paul R. D. Mason, James Farquhar, and Thomas Reimer. "Multiple sulfur isotopes in Paleoarchean barites identify an important role for microbial sulfate reduction in the early marine environment." Earth and Planetary Science Letters 331-332 (May 2012): 177–86. http://dx.doi.org/10.1016/j.epsl.2012.03.020.

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Xu, Xi, Shujin Shi, Xianrong Yang, Huan Shuai, Gaoxiang Du, and Jiao Wang. "Study of Construction of Innovative Barite/Waterborne Polyurethane/Low-Density Polyethylene Composites for Enhanced X-Ray Shielding Performance." Polymers 17, no. 4 (2025): 451. https://doi.org/10.3390/polym17040451.

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X-rays’ high-energy nature poses risks to human health. Traditional X-ray shielding materials often contain toxic lead and have drawbacks like bulkiness and rigidity. Consequently, there is an increasing need to develop lightweight, non-toxic, flexible, and efficient shielding materials. In this study, we modified barite with waterborne polyurethane (WPU) and systematically investigated the effects of WPU on barite’s properties. The modification with WPU not only reduced the tendency of barite (B) to agglomerate but also enhanced its compatibility with polymers, thereby significantly improving
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46

Thiyagarajan, V., R. Vijay, K. Sivakumar, and R. l. Harigovindhan. "Tribo-Thermal Based Evaluation of Non Asbestos Disc Brake Pad Formulation." Applied Mechanics and Materials 766-767 (June 2015): 432–37. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.432.

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Performance of Non Asbestos brake pad requires the optimization of numerous criteria. Alumina fibre is a metallic material which is light weight, excellent wear resistance, thermal stability and structural reinforcement properties. Hence the present work deals with the development of three friction composites in the form of standard disc brake pads using same ingredients in same proportion except alumina fiber containing 7%wt, 11%wt &amp; 14% wt which is compensated by synthetic barites (filler) containing 16%wt, 12%wt &amp; 9% wt and designated as NA01, NA02 and NA03 respectively. Various phy
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Ruiz, Joaquin, William C. Kelly, and Charles J. Kaiser. "Strontium isotopic evidence for the origin of barites and sulfides from the mississippi valley-type ore deposits in Southeast Missouri; discussion." Economic Geology 80, no. 3 (1985): 773–75. http://dx.doi.org/10.2113/gsecongeo.80.3.773.

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Lange, S., S. Chaudhuri, and N. Clauer. "Strontium isotopic evidence for the origin of barites and sulfides from the mississippi valley-type ore deposits in Southeast Missouri; reply." Economic Geology 80, no. 3 (1985): 775–76. http://dx.doi.org/10.2113/gsecongeo.80.3.775.

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., Harinath Balimidi. "COMPRESSIVE STRENGTH AND ANTI RADIATION SHIELDING OF CONCRETE BY PARTIAL REPLACEMENT OF COARSE AGGREGATE BY BARITES AND CEMENT BY SILICA FUME." International Journal of Research in Engineering and Technology 05, no. 05 (2016): 374–78. http://dx.doi.org/10.15623/ijret.2016.0505071.

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Thiyagarajan, V., and K. Kalaichelvan. "Influence of Steel Fiber on Thermal Stability and Thermal Conductivity in a Semi Metallic Disc Brake Pad Formulation." Advanced Materials Research 622-623 (December 2012): 1545–49. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.1545.

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Thermal conductivity and thermal stability plays a vital role on the performance of NAO brake pads . The Steel fiber a semi metallic composition is carried out in this paper to prepare the Non Asbestos Brake Pad. Steel fiber has good thermal stability and bulk density. So the optimization of steel fiber percentage for thermal behaviour is considered using TGA. The temperature rise during brake application will be between 150-4000C and this zone of temperature is very critical to determine the fade characteristics during friction testing. Less weight loss between 150 – 400°C during TGA testing
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