Relative contributions of silicate and carbonate rocks to riverine Sr fluxes in the headwaters of the Ganges

Bickle, M. J.; Chapman, H. J.; Bunbury, Judith; Harris, Nigel; Fairchild, Ian J.; Ahmad, Talat; Pomies, C.

doi:10.1016/j.gca.2004.11.019

Cited by 148 publications

(127 citation statements)

References 38 publications

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“…In these streams, supersaturation of carbonate species may result in the preferential precipitation of secondary calcite during fluvial transport. In some Himalayan waters (Jacobson et al, 2002;Bickle et al, 2005), up to $70% of Ca 2+ derived from carbonate weathering may be removed during transport from the High Himalaya to Lesser Himalaya due to changes in stream temperature and degassing of CO 2 from stream waters resulting in an increase in Mg 2+ /Ca 2+ ratios. Thus, Ca 2+ /Na + or Mg 2+ /Na + ratios in solution may change during transport of solutes.…”

Section: Silicate Versus Carbonate Weathering Reactionsmentioning

confidence: 99%

Major ion chemistry of the Yarlung Tsangpo–Brahmaputra river: Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya

Hren

Chamberlain

Hilley

et al. 2007

Geochimica et Cosmochimica Acta

168

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The Yarlung Tsangpo-Brahmaputra river drains a large portion of the Himalaya and southern Tibetan plateau, including the eastern Himalayan syntaxis, one of the most tectonically active regions on the globe. We measured the solute chemistry of 161 streams and major tributaries of the Tsangpo-Brahmaputra to examine the effect of tectonic, climatic, and geologic factors on chemical weathering rates. Specifically, we quantify chemical weathering fluxes and CO 2 consumption by silicate weathering in southern Tibet and the eastern syntaxis of the Himalaya, examine the major chemical weathering reactions in the tributaries of the Tsangpo-Brahmaputra, and determine the total weathering flux from carbonate and silicate weathering processes in this region. We show that high precipitation, rapid tectonic uplift, steep channel slopes, and high stream power generate high rates of chemical weathering in the eastern syntaxis. The total dissolved solids (TDS) flux from the this area is greater than 520 tons km À2 yr À1 and the silicate cation flux more than 34 tons km À2 yr À1 . In total, chemical weathering in this area consumes 15.2 · 10 5 mol CO 2 km À2 yr À1 , which is twice the Brahmaputra average. These data show that 15-20% of the total CO 2 consumption by silicate weathering in the Brahmaputra catchment is derived from only 4% of the total land area of the basin. Hot springs and evaporite weathering provide significant contributions to dissolved Na + and Cl À fluxes throughout southern Tibet, comprising more than 50% of all Na + in some stream systems. Carbonate weathering generates 80-90% of all dissolved Ca 2+ and Mg 2+ cations in much of the Yarlung Tsangpo catchment.

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Section: Silicate Versus Carbonate Weathering Reactionsmentioning

confidence: 99%

Major ion chemistry of the Yarlung Tsangpo–Brahmaputra river: Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya

Hren

Chamberlain

Hilley

et al. 2007

Geochimica et Cosmochimica Acta

168

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“…There is a continuing controversy over the quantification of carbonate and silicate derived Sr during weathering (e.g. Edmond, 1992;Krishnaswami et al, 1992;Palmer and Edmond, 1992;Pande et al, 1994;Quade et al, 1997;Harris et al, 1998;English et al, 2000;Bickle et al, 2003;Oliver et al, 2003;Bickle et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Calcium and magnesium isotope systematics in rivers draining the Himalaya-Tibetan-Plateau region: Lithological or fractionation control?

Tipper

Galy

Bickle

2008

Geochimica et Cosmochimica Acta

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200

130

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“…also contribute sediments to the Ganga Plain. The Sr and Nd isotope composition of the Himalayan and Peninsular rivers are quite distinct and is reflected by their bank sediments and river water (Krishnaswami et al, 1992;Jacobson and Blum, 2000;Bickle et al, 2001Bickle et al, , 2003Bickle et al, , 2005Dalai et al, 2003;Tripathi et al, 2004;Das et al, 2006;Rengarajan et al, 2009;Singh et al, 2008;Tripathy et al, 2010). A significant amount of Ganga Plain sediments are reworked by plainsfed river and again re-deposited within the Ganga Plain (Sinha and Friend, 1994;Gibling et al, 2005;Tripathi and Rajamani, 1999;Sinha et al, 2007; to sediments of the Bay of Bengal, information are scanty on erosion pattern of the Himalaya and their controlling factors from the Ganga Plain (Agrawal et al, 2013a, b).…”

Section: Climate Induced Temporal Change In Sr-nd Isotope Ratios In Tmentioning

confidence: 99%

Climate induced temporal change in Sr-Nd isotope ratios in the valley-fill deposits of the Ganga river

Agrawal

Sanyal²,

Balakrishnan

2014

Geochem. J.

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Relative contributions of silicate and carbonate rocks to riverine Sr fluxes in the headwaters of the Ganges

Cited by 148 publications

References 38 publications

Major ion chemistry of the Yarlung Tsangpo–Brahmaputra river: Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya

Major ion chemistry of the Yarlung Tsangpo–Brahmaputra river: Chemical weathering, erosion, and CO2 consumption in the southern Tibetan plateau and eastern syntaxis of the Himalaya

Calcium and magnesium isotope systematics in rivers draining the Himalaya-Tibetan-Plateau region: Lithological or fractionation control?

Climate induced temporal change in Sr-Nd isotope ratios in the valley-fill deposits of the Ganga river

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