Results 241 to 250 of about 5,358 (287)
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Chemical Geology, 2016
Abstract Chemical weathering plays a key role in the long-term climate change and global biogeochemical cycle. In this study, a 5.1 m-long basalt-developed weathering profile from Hunan Province, China, was selected for the analyses of major elements, grain size, pH, total organic carbon, thermogravimetric (TG) and differential thermogravimetric ...
Chengfan Yang, Shouye Yang, Ni Su
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Abstract Chemical weathering plays a key role in the long-term climate change and global biogeochemical cycle. In this study, a 5.1 m-long basalt-developed weathering profile from Hunan Province, China, was selected for the analyses of major elements, grain size, pH, total organic carbon, thermogravimetric (TG) and differential thermogravimetric ...
Chengfan Yang, Shouye Yang, Ni Su
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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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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
Ming-Yu Zhao, 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
Ming-Yu Zhao, Yong-Fei Zheng
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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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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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Environmental Earth Sciences, 2016
To explore the chemical weathering processes and the anthropogenic disturbance of weathering, 20 water samples were collected from the tributaries in the Nansihu Lake basin, a growing industrial area. The major ions in river waters were analyzed to identify and quantify the contributions of the different reservoirs. Based on stoichiometric analyses and
Jun Li +6 more
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To explore the chemical weathering processes and the anthropogenic disturbance of weathering, 20 water samples were collected from the tributaries in the Nansihu Lake basin, a growing industrial area. The major ions in river waters were analyzed to identify and quantify the contributions of the different reservoirs. Based on stoichiometric analyses and
Jun Li +6 more
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Spatial distribution of chemical weathering intensity on an acid hillslope
Zeitschrift für Geomorphologie, 2000S. J. Park, T. P. Burt
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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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, 2022