Evaluation of high-resolution elemental analyses of Chinese loess deposits measured by X-ray fluorescence core scanner

Auteur(s) et Affiliation(s)

LIANG, L.

State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, Chine

Graduate Univ. of Chinese Academy of Sciences, Beijing, Chine

SUN, Y.

State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, Chine

YAO, Z.

Key Lab. of Marine Sedimentology and Environment Geology, First Inst. of Oceanography, State Oceanic Administration, Qingdao, Chine

LIU, Y.

Key Lab. of Marine Sedimentology and Environment Geology, First Inst. of Oceanography, State Oceanic Administration, Qingdao, Chine

WU, F.

State Key Lab. of Loess and Quaternary Geology, Inst. of Earth Environment, CAS, Xi'an, Chine

Description :
To investigate geochemical variations of loess sediments at millennial and centennial timescales, and their potential for recording abrupt climate change, powder and U-channel (long plastic single-boxes used to sub-sample the center of split core sections) samples were collected from the Gulang loess section on the northwestern Chinese Loess Plateau for conventional and scanning X-ray fluorescence (XRF) analyses. Results suggest that although 10 elements (Al, Si, K, Ca, Ti, Fe, Zn, Rb, Sr and Zr,) can be detected robustly using scanning XRF method, only 5 elements (Si, Ca, Fe, Sr and Zr) can be employed confidently to infer the chemical weathering and grain size sorting effects. Comparison of scanning XRF-derived elemental data with magnetic susceptibility, grain size and speleothem records indicates that high-resolution elemental records have great potential for evaluating rapid fluctuations of the East Asia monsoon.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 92, p. 75-82, nombre de pages : 8, Références bibliographiques : 1 p.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais