Yangtze River sediments from source to sink traced with clay mineralogy

He, Miao; Zheng, Hongbo; Huang, Xueyong; Jia, Jihui; Ling, Li

doi:10.1016/j.jseaes.2012.10.001

Cited by 74 publications

(35 citation statements)

References 38 publications

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“…Accelerated reworking of moraines, terraces, and floodplain deposits may lead to anomalous sediment fluxes and overestimated detrital supply. Moreover, results based on bedload sands may not be applicable to the mud fraction carried in suspension (He et al, 2013b).…”

Section: Integrated Bulk-sand Petrography and Heavy-mineral Budgetmentioning

confidence: 99%

Erosion patterns in the Changjiang (Yangtze River) catchment revealed by bulk-sample versus single-mineral provenance budgets

et al. 2016

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Section: Integrated Bulk-sand Petrography and Heavy-mineral Budgetmentioning

confidence: 99%

Erosion patterns in the Changjiang (Yangtze River) catchment revealed by bulk-sample versus single-mineral provenance budgets

et al. 2016

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“…0.35-0.50 Pg organic carbon (OC) to the oceans per annum (Hedges et al, 1997;Lal, 2003). Rivers form a key connection between the terrestrial and marine carbon cycles, constituting the primary mode of carbon transport from continents to the ocean (Smil, 2007) and are thus key focal points in ''source to sink'' studies (Blair et al, 2004;Galy et al, 2007;He et al, 2013). Suspended particulate matter (SPM) is the most important carrier of particulate OC from continent to ocean.…”

Section: Introductionmentioning

confidence: 99%

Sources of organic matter in Changjiang (Yangtze River) bed sediments: Preliminary insights from organic geochemical proxies

Peterse

et al. 2015

Organic Geochemistry

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a b s t r a c tInsight into the content and composition of organic carbon (OC) in river systems contributes to our understanding of the global carbon cycle. The Changjiang (Yangtze River) plays a significant role in global carbon and hydrological cycles, as it is an important supplier of sediment, nutrients and OC to the East China Sea. To provide a preliminary insight into the source of OC transported by the Changjiang, we analyzed bulk (grain size, organic carbon content, d 13 C), and molecular (lignin phenols, branched and isoprenoid GDGTs) characteristics of organic matter in bed sediments at eight locations along the river. The d 13 C values and lignin phenol composition indicate that the OC originates from a mixture of primarily soils and plants. Comparison between branched GDGT (br GDGT) distributions in riverbed sediments and those in the different soil types in the drainage basin indicate that the br GDGT signal in the upper reaches is largely derived from soils from the Qinghai-Tibet Plateau. Downstream changes in br GDGT distributions can be linked to subsequent input of local soil material. The observed variation in br GDGT composition along the river implies that a portion of the OC may be oxidized or replaced by the local input during transit. Although the relationship between d 13 C and lignin phenol composition indicates that the contribution of phytoplankton is limited, comparison of GDGT ratios (GDGT-0:crenarchaeol, iso GDGTs:br GDGTs, BIT index) for the sediments and surrounding soils indicates that at least part of the iso GDGTs has an aquatic origin. Overall, the downstream evolution of br GDGTs in the Changjiang implies that their use as paleoclimate proxy in downcore applications will likely yield a local, rather than a basin-integrated continental climate record.

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“…Clays may occur as primary components of sedimentary rocks, for example, illite (KAl 2 Si 4 O 10 (OH) 2 ) and chlorite ((Mg,Al,Fe) (ZANARDO, 2003;CONCEIÇÃO;BONOTTO, 2006;ZANARDO et al, 2009;ROVERI, 2010;HE et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Using the mineralogy of river sediments as pollution indicator of clay mining activity

Mello

Zanardo

Conceição

et al. 2016

RBRH

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View of the difficulty to elect standards for water pollution control in clay mining activity, this study aimed to verify the possibility of using the mineralogy of river sediments as a pollution indicator of clay mining activity. The study was carried out in the Assistência . The mineralogical analysis of fluvial sediments indicated the presence of quartz, montmorillonite, illite and kaolinite in the fraction <53 micrometers. The kaolinite is from the surface soil erosion. However, the illite, predominant clay mineral in the rocks explored by mining, is practically absent in the surface horizon of the Assistência Stream basin. Thus, its presence in the suspended solids transported by Assistência Stream is associated with atmospheric deposition of dust produced during clay mining activities present in this watershed.

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Yangtze River sediments from source to sink traced with clay mineralogy

Cited by 74 publications

References 38 publications

Erosion patterns in the Changjiang (Yangtze River) catchment revealed by bulk-sample versus single-mineral provenance budgets

Erosion patterns in the Changjiang (Yangtze River) catchment revealed by bulk-sample versus single-mineral provenance budgets

Sources of organic matter in Changjiang (Yangtze River) bed sediments: Preliminary insights from organic geochemical proxies

Using the mineralogy of river sediments as pollution indicator of clay mining activity

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