Climate control on erosion distribution over the Himalaya during the past ~100 ka

Seasonal variations in the Sr-Nd isotopic compositions of suspended particulate matter in the lower Changjiang River: Provenance and erosion constraints

“…As a result, the Nd-Sr isotopic signatures of the sediments have been useful for identifying their sources and studying erosion processes [2, [26][27][28][29][30]. In addition, the Nd-Sr isotopic signatures of geological time scale sediments have been widely used to probe evolution of the Asian monsoon and the uplift history of Tibetan Plateau [31][32][33][34][35][36][37][38][39]. Several studies of the Nd-Sr isotopic compositions of the CR sediments have recently been conducted [40][41][42].…”

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

“…1), are directly deposited by the Himalayan river and the observed variations in Sr and Nd isotopic ratios is linked with variable proportion of mixing of the HH and LH sediments under the influence of climate. However, the two isotope system plot of Sr and Nd isotope data from the IITK core (Rahaman et al, 2009) clustered within range of the HH rocks. This kind of clustering can only be observed in the sediments of Bay of Bengal (Galy et al, 2010;Fig.…”

“…We also compared Sr and Nd isotopic composition of the Firozpur core sediments with the existing records generated from the Bay of Bengal (France-Lanord et al, 1993;Galy et al, 2008Galy et al, , 2010Colin et al, 1999Colin et al, , 2006 and the Ganga Plain sediments (Rahaman et al, 2009;Agrawal et al, 2013a). France-Lanord et al (1993) investigated variations in the Sr and Nd isotopic ratios in a sediment core from the Bay of Bengal spanning 17 Ma time period and showed that the dominant source of these sediments is the Higher Himalayan Crystallines with lesser contribution from the LH.…”

“…5. Two isotope system plot (after Singh et al, 2008) of 87 Sr/ 86 Sr and εNd in silicates of the Ganga Plain sediments (Rahaman et al, 2009;Agrawal et al, 2013a) and Bay of Bengal sediments (Galy et al, 2010 example, Bookhagen and Burbank (2006) showed that modern erosion rates over the HH and LH are strongly dependent on rainfall amount with two rainfall maxima along strike of the Himalaya, one at the southern margin of the LH and another at the rising limb of the HH. Erosion rate at latter place is much higher due to its higher elevation and steep gradient.…”

“…Apart from the Bay of Bengal, the sediments of the Ganga Plain have been used to understand change in sediments sources. Based on Sr and Nd isotopic data in silicate which range from 0.72701 to 0.76708 and -16.6 to -14.4 respectively, Rahaman et al (2009) showed that 50 m thick floodplain sediments of Indian Institute of Technology Kanpur (IITK) core, collected from the interfluve area of the Ganga-Yamuna river (Fig. 1), are directly deposited by the Himalayan river and the observed variations in Sr and Nd isotopic ratios is linked with variable proportion of mixing of the HH and LH sediments under the influence of climate.…”