Geochemistry of major and trace elements and Pb–Sr isotopes of a weathering profile developed on the Lower Cambrian black shales in central Hunan, China

2014 ◽  
Vol 51 ◽  
pp. 191-203 ◽  
Author(s):  
Bo Peng ◽  
Andrew Rate ◽  
Zhaoliang Song ◽  
Changxun Yu ◽  
Xiaoyan Tang ◽  
...  
Keyword(s):  
Trace Elements ◽  
Lower Cambrian ◽  
Major And Trace Elements ◽  
Black Shales ◽  
Sr Isotopes ◽  
Weathering Profile

Chemical weathering on the Carnmenellis granite

1973 ◽  
Vol 39 (304) ◽  
pp. 429-447 ◽  
Author(s):  
C. M. Rice
Keyword(s):  
Trace Elements ◽  
Chemical Weathering ◽  
Mineralogical Composition ◽  
Major And Trace Elements ◽  
Weathering Profile ◽  
Normal Behaviour ◽  
Secondary Minerals ◽  
Low Degree ◽  
Bulk Chemical ◽  
Mineral Changes

SummaryThe behaviour of 25 major and trace elements, together with mineral changes, has been examined in a deep weathering profile on the Carnmenellis granite, Cornwall. The bulk chemical and mineralogical composition of the regolith shows only minor changes from the parent rock indicating a low degree of chemical weathering. However, within the regolith marked differences occur between the fine fractions from the various horizons. Chlorite and degraded muscovite characterize the fines of horizons A+B and C whereas gibbsite and kaolinite characterize horizon D. Secondary minerals becoming base deficient with depth is the reverse of normal behaviour and two possible theories are advanced to explain this anomaly. Most of the trace elements are concentrated in the < 10 µm fraction of the various horizons, in part by an association with degraded muscovite. Tin and Zr occur in resistates and Be, Sr, and Co are mainly lost during weathering.

Provenance of quaternary and modern alluvial deposits of the Amazonian floodplain (Brazil) inferred from major and trace elements and Pb–Nd–Sr isotopes

2014 ◽  
Vol 411 ◽  
pp. 144-154 ◽  
Author(s):  
Adriana Maria Coimbra Horbe ◽  
Ivaldo Rodrigues da Trindade ◽  
Elton Luiz Dantas ◽  
Roberto Ventura Santos ◽  
Martin Roddaz
Keyword(s):  
Trace Elements ◽  
Major And Trace Elements ◽  
Sr Isotopes ◽  
Alluvial Deposits

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

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