Chemical fluxes from time series sampling of the Irrawaddy and Salween Rivers, Myanmar

Chapman, Hazel and Bickle, Mike and Thaw, San Hla and Thiam, Hrin Nei (2015) Chemical fluxes from time series sampling of the Irrawaddy and Salween Rivers, Myanmar. Chemical Geology, 401. pp. 15-27. ISSN 0009-2541 DOI 10.1016/j.chemgeo.2015.02.012

[img]
Preview
Text
chapman.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview
[img]
Preview
Image
1-s2.0-S0009254115000510-gr1.jpg - Published Version
Available under License Creative Commons Attribution.

Download (36kB) | Preview
[img] Text
mmc1.xlsx - Supplemental Material
Available under License Creative Commons Attribution.

Download (63kB)
[img] Text
mmc2.xlsx - Supplemental Material
Available under License Creative Commons Attribution.

Download (24kB)
[img] Text
mmc3.xlsx - Supplemental Material
Available under License Creative Commons Attribution.

Download (13kB)
Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

The Irrawaddy and Salween rivers in Myanmar deliver water fluxes to the ocean equal to ~ 70% of the Ganges–Brahmaputra river system. Together these systems are thought to deliver about half the dissolved load from the tectonically active Himalayan–Tibetan orogen. Previously very little data was available on the dissolved load and isotopic compositions of these major rivers. Here we present time series data of 171 samples collected fortnightly at intervals throughout 2004 to 2007 from the Irrawaddy and Salween at locations near both the river mouths, the up-stream Irrawaddy at Myitkyina, the Chindwin, a major tributary of the Irrawaddy and a set of 28 small tributaries which rise in the flood plain of the Irrawaddy between Yangon and Mandalay. The samples have been analysed for major cation, anion and 87Sr/86Sr ratios. The new data indicates that the Irrawaddy has an annual average Na concentration only a third of the widely quoted single previously published analysis. The Irrawaddy and Salween drain about 0.5% of global continental area and deliver about 3.3% of the global silicate-derived dissolved Ca + Mg fluxes and 2.6% of the global Sr riverine fluxes to the oceans. This compares with Ganges and Brahmaputra which deliver about 3.4% of the global silicate-derived dissolved Ca + Mg fluxes and 3.2% of the global Sr riverine fluxes to the oceans from about 1.1% of global continental area. The discharge-weighted mean 87Sr/86Sr ratio of the Irrawaddy is 0.71024 and the Salween 0.71466.

Item Type: Article
Uncontrolled Keywords: 2015AREP; IA68;
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
07 - Gold Open Access
Journal or Publication Title: Chemical Geology
Volume: 401
Page Range: pp. 15-27
Identification Number: 10.1016/j.chemgeo.2015.02.012
Depositing User: Sarah Humbert
Date Deposited: 28 Mar 2015 02:10
Last Modified: 09 Apr 2015 09:39
URI: http://eprints.esc.cam.ac.uk/id/eprint/3267

Actions (login required)

View Item View Item

About cookies