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




Seasonal variations in the Sr-Nd isotopic compositions of suspended particulate matter in the lower Changjiang River: Provenance and erosion constraints - Download this document for free, or read online. Document in PDF available to download.

Chinese Science Bulletin

, Volume 56, Issue 22, pp 2371–2378

First Online: 12 July 2011Received: 21 January 2011Accepted: 16 May 2011

Abstract

Suspended particulate matter samples were collected monthly for more than 2 years in Nanjing, China to examine seasonal changes in the Sr-Nd isotopic compositions of the lower Changjiang River CR. The results indicate that the Sr-Sr ratios of the samples ranges from 0.725352 to 0.738128, and the values of ɛNd0 ranges from −10.55 to −12.29. The Sr-Nd isotopic compositions show distinct seasonal variations. The samples had lower Sr-Sr ratios and higher ɛNd0 values during the flood season than the dry seasons. The seasonal variations primarily reflect the controls of provenance rocks and erosion in different sub-catchments. The relative decrease in Sr-Sr ratios and the increase in ɛNd0 values during the flood season may reflect an increasing in the mechanical erosion rate in the upper basin and the contribution of more sediment from the upper reaches. The end member values of Sr-Sr and ɛNd0 of the samples were 0.728254 and −11.26, respectively.

KeywordsChangjiang River suspended particulate matter Sr-Nd isotopic compositions seasonality provenance This article is published with open access at Springerlink.com

Download to read the full article text



Author: ChangPing Mao - Jun Chen - XuYin Yuan - ZhongFang Yang - JunFeng Ji

Source: https://link.springer.com/article/10.1007/s11434-011-4589-6



DOWNLOAD PDF




Related documents