Results 261 to 270 of about 6,571,291 (289)
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Journal of Chinese Geography, 2008
The chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang are studied in this paper. (1) The Xiashu loess profile underwent moderate chemical weathering. It seems that the precipitation is a more important factor than the temperature in controlling the process of the chemical weathering.
Xusheng Li, Zhiyong Han, Shouye Yang
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The chemical weathering intensity and element migration features of the Xiashu loess profile in Zhenjiang are studied in this paper. (1) The Xiashu loess profile underwent moderate chemical weathering. It seems that the precipitation is a more important factor than the temperature in controlling the process of the chemical weathering.
Xusheng Li, Zhiyong Han, Shouye Yang
exaly +2 more sources
Quaternary Science Reviews, 2010
Abstract Major element chemical analyses of the Baishui loess–red clay sequence (35° 24′ 10″N, 106° 54′ 43″E, Gansu Province, China) reveal that, the chemical weathering intensities inferred from CIA (chemical index of alteration) values have progressively weakened and increased in amplitude with decreasing age.
Shangfa Xiong +4 more
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Abstract Major element chemical analyses of the Baishui loess–red clay sequence (35° 24′ 10″N, 106° 54′ 43″E, Gansu Province, China) reveal that, the chemical weathering intensities inferred from CIA (chemical index of alteration) values have progressively weakened and increased in amplitude with decreasing age.
Shangfa Xiong +4 more
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Chemical weathering intensity of the Late Cenozoic “Red Clay” deposits in the Carpathian Basin
Geochemistry International, 2007INTRODUCTIONVery little work had been previously done on thistopic in Hungary. In the past decade, little attention hasbeen paid to the red clay in the Carpathian Basin. Dif-ferent views on the formation, properties, and distribu-tion of red clays have been published by severalauthors. Many geologists draw parallels between redclays and bauxites [1–3].
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Chemical Geology, 2015
Abstract A geochemical study of major-trace elements in detrital sediment and carbon–oxygen isotopes in carbonate was carried out for a marine stratigraphic profile of Early Triassic that is composed of argillaceous limestone and calcareous mudstone in the Lower Yangtze basin, South China. The results place constraints on the geochemical behaviors of
Yong-Fei Zheng
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Abstract A geochemical study of major-trace elements in detrital sediment and carbon–oxygen isotopes in carbonate was carried out for a marine stratigraphic profile of Early Triassic that is composed of argillaceous limestone and calcareous mudstone in the Lower Yangtze basin, South China. The results place constraints on the geochemical behaviors of
Yong-Fei Zheng
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Chemical Geology, 1986
Abstract Upper Pleistocene muds of the Amazon deep-sea fan contain an abundance of residual weathering products, as indicated by their bulk chemical and mineralogical compositions. The muds are chemically more mature than average shale, average pelagic mud, or the surrounding Demerara Abyssal sediments.
B.I. Kronberg, H.W. Nesbitt, W.W. Lam
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Abstract Upper Pleistocene muds of the Amazon deep-sea fan contain an abundance of residual weathering products, as indicated by their bulk chemical and mineralogical compositions. The muds are chemically more mature than average shale, average pelagic mud, or the surrounding Demerara Abyssal sediments.
B.I. Kronberg, H.W. Nesbitt, W.W. Lam
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2017
Agricultural pollution is a matter of political and scientific concern throughout the world. Intensive agriculturecan cause nutrient contamination of groundwater and surface water. Nutrient pollution causes eutrophicationin freshwater and estuarine ecosystems.
Aquilina, Luc +9 more
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Agricultural pollution is a matter of political and scientific concern throughout the world. Intensive agriculturecan cause nutrient contamination of groundwater and surface water. Nutrient pollution causes eutrophicationin freshwater and estuarine ecosystems.
Aquilina, Luc +9 more
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2021
The study discusses the relationship between the intensity of weathering and trace metals concentrations in soil horizons. Weathering intensity was calculated with indices such as Ruxton ration (RR), chemical index of alteration (CIA), chemical index of weathering (CIW), plagioclase index of alteration (PIA), volgt weathering indices (V) and weathering
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The study discusses the relationship between the intensity of weathering and trace metals concentrations in soil horizons. Weathering intensity was calculated with indices such as Ruxton ration (RR), chemical index of alteration (CIA), chemical index of weathering (CIW), plagioclase index of alteration (PIA), volgt weathering indices (V) and weathering
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Lithos, 1988
Abstract A series of soil and stream sediments developed during intense weathering on the metaluminous Danburg granite, northeastern Georgia, U.S.A., have been analyzed mineralogically and chemically. The concentrations of Ba, Na, Rb and Cs in the silt and coarser fractions are controlled mainly by feldspars and biotite.
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Abstract A series of soil and stream sediments developed during intense weathering on the metaluminous Danburg granite, northeastern Georgia, U.S.A., have been analyzed mineralogically and chemically. The concentrations of Ba, Na, Rb and Cs in the silt and coarser fractions are controlled mainly by feldspars and biotite.
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Geochemical analyses of major oxides, trace, and rare-earth elements (REE) were examined on the ~70 m core sediments collected from the southeast coast of Bangladesh to determine sediment provenance, maturity, and chemical weathering conditions. The sediment samples contained high SiO2 (62-91 wt.%) and low Al2O3 (~5-17 wt.%) contents and showed a ...
H. M. Zakir Hossain +5 more
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H. M. Zakir Hossain +5 more
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