Program for Session 16a

Thursday 17th July PM: Room SRC

16a (Poster): Isotopic and geochemical insights into the rates and mechanisms of erosion and weathering Download PDF

218  Bedrock Erosion Rates in the Antarctic Dry Valleys
Balco G, Putkonen J, Morgan D, Schaefer J & Winckler G
219  Pb, Sr and Nd Isotopic Constraints on the Evolving Provenance of the Red River
Clift P, Ellam R, Hinton R & Tan MT
220  Isotope Fractionation of Dissolved Silicon in Groundwater – Weathering of Secondary Minerals?
Georg B, Zhu C, Basu A & Halliday A
**221  Hot Spring Spurted into Laterite Layer: Geology and Geochemistry Evidence
Gong Q, Deng J, Yang L, Wang Q & Wang W
222  Seasonal Trends in Solutes and 87Sr/86Sr Ratios of SE Tibet Rivers: Yarlung Tsangpo and Parlung
Hagedorn B, Nelson B, Kennell T, Henck A & Hallet B
**223  Weathering Processes and Source of DIC for Two Contrasting Small Watersheds in the Subtropical Zone, China
Ji H, Jiang Y & Li T
224  Chemical Weathering of Qinghai-Tibet Plateau: Geochemical Study of Jinsha Jiang, Lancang Jiang, and Nu Jiang River Water, China
Liu C-Q, Zhao Z-Q, Tao F & Li S-L
225  Landscape Evolution of Northern New Mexico as Recorded in Jarosite
Samuels K, Lueth V, Campbell A & Peters L
226  The Behaviour of Mg and Li Isotopes during the Dissolution and Precipitation of Silicate Minerals
Wimpenny J, James R, Gislason S, Gannoun M & Burton K
227  Lithium Isotope Geochemistry in a Polar Desert, McMurdo Dry Valleys, Antarctica
Witherow R, Henderson G & Lyons WB
**228  Geochemistry of Silicon and Oxygen in the Regolith on Feihong Ultramafic Complex,West Yunnan,China
Yang Z, Liu Y & Tian S

Friday 18th July AM: Room W5

16a (Oral): Isotopic and geochemical insights into the rates and mechanisms of erosion and weathering Download PDF
Session chaired by Anthony Dosseto, Gavin Foster, Kate Maher & Joerg Schaefer

10:00  Keynote: U-Isotope Fractionation during Chemical Weathering
Bourdon B, Andersen M, Erel Y & Pili E
10:30  Calibrating U-Series Tools for Weathering Rate and Duration on a Soil Sequence of Known Ages
Keech A, Pett-Ridge J, West J & Henderson G
10:45  Invited: U-Series Comminution Ages from a Pleistocene Alluvial Fan
Lee V, DePaolo D & Christensen J
11:00  Quaternary Weathering Rates and Marine Geochemical Budgets
Vance D, Teagle D & Foster G
11:15  Invited: Chemical Weathering Trends and North American Freshwater Discharge Recorded in the Western North Atlantic during Termination 1
Gutjahr M, Frank M, Halliday AN & Keigwin LD
11:30  The Marine Pb Isotope Response to Ice Sheet Growth and Decay
Crocket KC, Foster GL, Richards DA, Vance D, Tranter M & Wadham JL
12:00  Strontium Stable Isotope Variations Accompanying Continental Weathering with Implications for the Marine Radiogenic Strontium Record
Burton K, Parkinson I & Mokadem F
12:15  Ca Isotopes and the Rainfall Limit of Silicate Weathering on Earth
Ewing S, Amundson R, Stewart BW, Thiemens M & DePaolo D

Friday 18th July PM: Room W5

16a (Oral): Isotopic and geochemical insights into the rates and mechanisms of erosion and weathering Download PDF
Session chaired by Anthony Dosseto, Gavin Foster, Kate Maher & Joerg Schaefer

14:00  Ca Isotope Ratios in the Largest Rivers in the World: Implications for the Global Ca Budget and Weathering Processes
Tipper E, Gaillardet J, Galy A, Louvat P & Bickle M
14:15  Geochemical Signatures are Driven by Seasonal Flow Regimes in the Chena River Near Fairbanks, Alaska
Douglas T, Blum J, Keller K, Guo L & Cai Y
14:30  Isotopic Tracing of Carbon Weathering in the Amazon River
Bouchez J, Gaillardet J, France-Lanord C & Galy V
14:45  Origin of Riverine Dissolved Inorganic Carbon: Comparison between West Indies, Reunion and Iceland
Rive K, Agrinier P & Gaillardet J
**15:00  Transition Metal Isotopes in Rivers and the Weathering Environment
Archer C & Vance D
15:15  Molybdenum Isotope Fractionation Accompanying Weathering, Riverine Transport and Estuarine Mixing
Pearce CR, Burton K, Pogge von Strandmann P, James R & Cohen A
15:30  Molybdenum Isotopes as Proxy for Redox Conditions during Weathering
Pett-Ridge J, Siebert C & Halliday A
15:45  Lithium Isotope Fractionation along a Weathering Chronosequence
Lemarchand E, Reynolds BC, Wiederhold JG, Bourdon B & Kretzschmar R
16:00  Silicon Cycle in Weathering Sequences of Volcanic Soils in Cameroon Using δ30Si and Ge/Si
Opfergelt S, Delvaux B, Cardinal D, Delvigne C & André L