In-situ cosmogenic 36Cl denudation rates of carbonates in Guizhou karst area

Xu, S., Liu, C. Q., Freeman, S. , Lang, Y. C., Schnabel, C., Tu, C. L., Wilcken, K. and Zhao, Z. Q. (2013) In-situ cosmogenic 36Cl denudation rates of carbonates in Guizhou karst area. Chinese Science Bulletin, 58(20), pp. 2473-2479. (doi:10.1007/S11434-013-5756-8)

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Abstract

This study quantifies surface denudation of carbonate rocks by the first application of in-situ cosmogenic 36Cl in China. Concentrations of natural Cl and in-situ cosmogenic 36Cl in bare carbonates from Guizhou karst areas were measured with isotope dilution by accelerator mass spectrometer. The Cl concentration varied from 16 to 206 ppm. The 36Cl concentrations were in range of (0.8–2.4)×106 atom g−1, resulting in total denudation rates of 20–50 mm ka−1 that averaged over a 104–105 a timescale. The 36Cl-denudation rates showed roughly a negative correlation with the local mean temperature. This preliminary observation may suggest the variations of proportions of chemical weathering and physical erosion in denudation process, depending upon local climatic conditions.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wilcken, Mr Klaus and Xu, Dr Sheng and Freeman, Professor Stewart and Schnabel, Dr Christoph
Authors: Xu, S., Liu, C. Q., Freeman, S., Lang, Y. C., Schnabel, C., Tu, C. L., Wilcken, K., and Zhao, Z. Q.
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Chinese Science Bulletin
Publisher:Springer Berlin Heidelberg
ISSN:1001-6538
ISSN (Online):1861-9541
Copyright Holders:Copyright © 2013 The Authors
First Published:First published in Chinese Science Bulletin 58(20):2473-2479
Publisher Policy:Reproduced under a Creative Commons License

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