Results 161 to 170 of about 9,511 (218)
Acantharians and marine barite
Marine Chemistry, 2004 Formation of marine barite (BaSO4) concurrent with dissolution of acantharian celestite (Sr/Ba, SO4) was examined under laboratory conditions in this work.
Robert H. Byrne
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Insulating epoxy/barite and polyester/barite composites for radiation attenuation
Applied Radiation and Isotopes, 2013A trial has been made to create insulating Epoxy/Barite (EP/Brt) (ρ=2.85 g cm(-3)) and Crosslinked Unsaturated Polyester/Barite (CUP/Brt) (ρ=3.25 g cm(-3)) composites with radiation attenuation and shielding capabilities. Experimental work regarding mechanical and physical properties was performed to study the composites integrity for practical ...
M A, El-Sarraf, A, El-Sayed Abdo
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2020
Reconstruction of ocean paleoproductivity and paleochemistry is paramount to understanding global biogeochemical cycles such as the carbon, oxygen and sulfur cycles and the responses of these cycles to changes in climate and tectonics. Paleo-reconstruction involves the application of various tracers that record seawater compositions, which in turn may ...
Weiqi Yao +2 more
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Reconstruction of ocean paleoproductivity and paleochemistry is paramount to understanding global biogeochemical cycles such as the carbon, oxygen and sulfur cycles and the responses of these cycles to changes in climate and tectonics. Paleo-reconstruction involves the application of various tracers that record seawater compositions, which in turn may ...
Weiqi Yao +2 more
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Precipitation of barite by marine bacteria: A possible mechanism for marine barite formation
Geology, 2012Barite (BaSO 4 ) is found throughout the ocean, yet seawater is undersaturated with respect to barite, and organisms that could account for the abundance of barite have not yet been identifi ed. The mechanism for barite formation in seawater is not fully understood.
M.T. Gonzalez-Muñoz +4 more
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Microbial mobilization of barite
Chemical Geology, 1974Abstract Bacteria from lake mud grown under anaerobic conditions with powdered barite present significantly increase the amount of barium that dissolves in the culture medium. Innocula of lake mud were added to a growth medium specified for sulfate-reducing bacteria. Powdered barite was added to each culture flask and flasks were purged with nitrogen,
Claude E. Bolze +2 more
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GEOPHYSICAL PROSPECTING FOR BARITE *
Geophysical Prospecting, 1974AbstractA case history is presented for the exploration of barite with the electrical resistivity method. Altogether eight locations were recommended out of which six correspond to barite bodies. In the present case the gravity method, which is commonly used for the location of barite because of its high density contrast with the host rocks, has failed,
B. B. BHATTACHARYA +2 more
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Journal of Petroleum Technology, 2004
This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 87136, "Barite-Sag Management: Challenges, Strategies, Opportunities," by Paul D. Scott, SPE, Marathon Oil Co., and Mario Zamora, SPE, and Catalin Aldea, SPE, M-I LLC, prepared for the 2004 IADC/SPE Drilling Conference, Dallas, 2-4 March.
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This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 87136, "Barite-Sag Management: Challenges, Strategies, Opportunities," by Paul D. Scott, SPE, Marathon Oil Co., and Mario Zamora, SPE, and Catalin Aldea, SPE, M-I LLC, prepared for the 2004 IADC/SPE Drilling Conference, Dallas, 2-4 March.
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Effects of barite size on the fluorite flotation using the reagent scheme of GS/NaOl
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2021Siyuan Yang
exaly