Chemical weathering of monsoonal eastern China: implications from major elements of topsoil

Qiu, Sen; Zhu, Zhaojie; Tian, Yang; Yi, Wu; Bai, Yang; Ouyang, Tingping

doi:10.1016/j.jseaes.2013.12.004

Cited by 38 publications

(16 citation statements)

References 86 publications

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“…The rivers entering East China's marginal seas are mostly latitudinal oriented and span across different climate zones from north to south. Previous studies suggest that climate (average temperature, precipitation and runoff) is the dominant factor controlling silicate weathering intensity in these catchments while tectonic activity and physical erosion exert minor roles [ Yang et al ., ; Li and Yang , ; Shao et al ., ; Qiu et al ., ]. This is likely true when considering that the river basins in East China mainland are all located in tectonically stable terrains.…”

Section: Discussionmentioning

confidence: 99%

“…The Weathering (Mobility) Indexes of aNa, Ak, and aBa For the bulk samples, Changjiang and Taiwan rivers have more or less similar aNa, aK and aBa values, while the Minjiang still has the highest values (supporting information Table S6). Compared to the bulk samples, the clays are more sensitive to the difference of chemical weathering registered in the fluvial sediments [Qiu et al, 2014]. All the river clays, except for the Minjiang (aNa@20), have similar aNa values, ranging from 3.6 to 6.5 ( Figure 5).…”

Section: Element Chemistry In the Riverine Sedimentsmentioning

confidence: 99%

“…Geochemistry, Geophysics, Geosystems 10.1002/2015GC005867 tectonic activity and physical erosion exert minor roles [Yang et al, 2004;Li and Yang, 2010;Shao et al, 2012;Qiu et al, 2014]. This is likely true when considering that the river basins in East China mainland are all located in tectonically stable terrains.…”

Section: Major Constraints Of Silicate Weathering In the River Basinsmentioning

confidence: 99%

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Geochemistry of river‐borne clays entering the East China Sea indicates two contrasting types of weathering and sediment transport processes

Yang

et al. 2015

Geochem Geophys Geosyst

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The East China Sea is characterized by wide continental shelf receiving a huge input of terrigenous matter from both large rivers and mountainous rivers, which makes it an ideal natural laboratory for studying sediment source‐to‐sink transport processes. This paper presents mineralogical and geochemical data of the clays and bulk sediments from the rivers entering the East China Sea, aiming to investigate the general driving mechanism of silicate weathering and sediment transport processes in East Asian continental margin. Two types of river systems, tectonically stable continental rivers and tectonically active mountainous rivers, coexist in East Asia. As the direct weathering products, clays can better reflect the silicate weathering regimes within the two river systems. Provenance rock types are not the dominant factor causing silicate weathering intensity difference existed in the East Asian rivers. The silicate weathering intensity of tectonically stable river basins is primarily driven by monsoon climate, and the sediment transfer is relatively slow because of natural trapping process and increasing damming effect. The geochemistry of these river‐borne sediments can thus indicate paleo‐weathering intensities in East Asian continent. In contrast, silicate weathering intensity in tectonically active mountainous rivers is greatly limited by strong physical erosion despite the high temperature and highest monsoon rainfall. The factors controlling silicate weathering in tectonically active catchments are complex and thus, it should be prudent to use river sediment records to decipher paleoclimate change. These two different silicate weathering regimes and sediment transport processes are manifestations of the landscape evolution and overall dominate the sedimentation in Asian continental margin.

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Section: Discussionmentioning

confidence: 99%

Section: Element Chemistry In the Riverine Sedimentsmentioning

confidence: 99%

Section: Major Constraints Of Silicate Weathering In the River Basinsmentioning

confidence: 99%

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Geochemistry of river‐borne clays entering the East China Sea indicates two contrasting types of weathering and sediment transport processes

Yang

et al. 2015

Geochem Geophys Geosyst

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“…Of the major cations present in soils, K and Ca are regarded as relatively easily weathered elements, while Ti and Fe are considered less reactive (Che et al, 2012;Elias and Mock, 2013;Kylander et al, 2013;Qiu et al, 2014). The removal of cations during chemical weathering is fast.…”

Section: Geological and Geomorphological Constraints On Lake Formationmentioning

confidence: 99%

The Tienchi Pond on Lanyu Island (Western Pacific): Lake formation and potential as environmental archive

Löwemark

Chen

Gunnarson

et al. 2015

Journal of Asian Earth Sciences

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“…Geochemical composition of terrigenous sediments has been widely used to interpret the source rock characteristics (Madhavaraju and Ramasamy, , ; Lee et al ., ; Etemad‐Saeed et al ., ) and weathering condition (Qiu et al ., ; Spalletti et al ., ; Tawfik et al ., ) and also to reconstruct the tectonic setting of a depositional basin (Verma and Armstrong‐Altrin, , ; Armstrong‐Altrin, ; Pundaree et al ., ; Verma et al ., ). Trace elements such as high field strength elements, transition trace elements and rare earth elements (REE) are most suited for provenance study, because of their relatively low mobility during sedimentary processes and their short residence times in sea water (Cullers, ).…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and geochemistry of sands along the Manzanillo and El Carrizal beach areas, southern Mexico: implications for palaeoweathering, provenance and tectonic setting

et al. 2016

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The provenance of sands from the Manzanillo (MN) and El Carrizal (CAR) beach areas along the Mexican Pacific coast (southern Mexico) was investigated based on their modal composition, mineralogy and geochemical data. The average quartz, feldspar and lithic fragment (QFL) ratios revealed that the proportion of quartz is higher in CAR sands than in MN sands. In comparison with MN, the CAR sands are enriched in SiO2 content with higher SiO2/Al2O3 ratio indicating that sediment recycling is greatest for the CAR sands. The variation in K2O/Al2O3 and Na2O/K2O ratios between the MN and CAR sands specified a difference in the relative proportion of plagioclase. The chemical index of alteration (CIA) and Plagioclase Index of Alteration (PIA) values revealed a moderate weathering intensity in the source areas. The MN sands are characterized by a low degree of rare earth element (REE) fractionation (LaCN/YbCN = ~6–7), whereas the CAR sands define fractionated REE patterns (LaCN/YbCN = ~8.8–16.8). The fractionated REE pattern with elevated total low REE (∑LREE) content of the CAR sands suggested that sediment sorting is higher for the CAR than MN sands. Small negative and positive Eu anomalies (Eu/Eu* = ~0.91–1.23) of MN sands indicated the derivation of sediments from felsic‐intermediate source rocks. The CAR sands showed higher concentration of ∑LREE than total heavy REE (∑HREE) and characterized by a significant negative Eu anomaly (Eu/Eu* = ~0.46–0.78), suggested that the source rock is felsic type. The result obtained by the comparison of REE patterns of the beach sands to the probable source rocks is also consistent with this observation. The compositional differences identified between the MN and CAR beach areas suggested that longshore current in the mixing and homogenization of sands is not significant. The new tectonic discriminant‐function‐based multidimensional diagrams showed an arc setting (active) for the MN sands and a rift setting (passive) for the CAR sands, which is consistent with the regional geology of southern Mexico. Copyright © 2016 John Wiley & Sons, Ltd.

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Chemical weathering of monsoonal eastern China: implications from major elements of topsoil

Cited by 38 publications

References 86 publications

Geochemistry of river‐borne clays entering the East China Sea indicates two contrasting types of weathering and sediment transport processes

Geochemistry of river‐borne clays entering the East China Sea indicates two contrasting types of weathering and sediment transport processes

The Tienchi Pond on Lanyu Island (Western Pacific): Lake formation and potential as environmental archive

Mineralogy and geochemistry of sands along the Manzanillo and El Carrizal beach areas, southern Mexico: implications for palaeoweathering, provenance and tectonic setting

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