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Late Quaternary downcutting rates of the Qianyou river from U/Th speleothem Dates, Qinling mountains, China

Published online by Cambridge University Press:  20 January 2017

Wang Fei ,
Li Hongchun ,
Zhu Rixiang  and
Qin Feizhou
Wang Fei*
Affiliation:
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Li Hongchun
Affiliation:
Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA
Zhu Rixiang
Affiliation:
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Qin Feizhou
Affiliation:
Department of Physics and Information, University of Ningxia, Yinchuan 750021, China
*
*Corresponding author. Fax: +86 10 62010846. E-mail address:[email protected](F. Wang).
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Abstract

Dating deposits in caves formed by rivers may yield insight into rates and processes of bedrock incision. Three cave passages at different levels have developed in the walls of the Qianyou River valley in the Qinling mountains, south of the city of Xian, China. Twelve speleothem samples near the position of palaeowater tables in three cave passages are dated by the 230Th dating method. The results show that the river cut down at the rate of 0.23 ± 0.02 mm/yr from 358,000 ± 38,000 to 247,000 ± 28,000 yr ago, 0.19 ± 0.03 mm/yr from 247,000 ± 28,000 to 118,000 ± 19,000 yr ago, and 0.51 ± 0.08 mm/yr from 118,000 ± 19,000 yr ago until today. These fall very close to the glacial–interglacial transition following marine oxygen isotope stages 10, 8, and 6, respectively. The increase in downcutting rates during the interglacial period is consistent with warm, wet weather, increasing rates of erosion. This may lead us toward an underlying mechanism for modulating incision that is not in a direct response to the presence of headwater glaciers.

Keywords

Qianyou RiverSpeleothemQinling mountains, China
Type
Research Article
Information
Quaternary Research , Volume 62 , Issue 2 , September 2004 , pp. 194 - 200
Copyright
University of Washington

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References

Anderson, R.S., Repka, J.L., Dick, G.S., (1996). Explicit treatment of inheritance in dating depositional surfaces using in-situ 10Be and 26Al. Geology 24, 47–51.2.3.CO;2>CrossRefGoogle Scholar
Atkinson, T.C., Rowe, P.J., (1992). Applications of dating to denudation chronology and landscape evolution. Ivanovich, M., Harmon, R.S., Uranium-Series Disequilibrium: Applications to Earth, Marine, and Environmental Sciences second ed. Oxford University, New York., 669–703.Google Scholar
Burbank, D.W., Leland, J., Fielding, E., Anderson, R.S., Brozovic, N., Reid, M.R., Duncan, C., (1996). Bedrock incision, rock uplift, and threshold hillslopes in the northwestern Himalayas. Nature 379, 505–510.CrossRefGoogle Scholar
Edwards, R.L., Chen, J.H., Wasserburg, G.J., (1986). 238U–234U–230Th–232Th systematics and the precise measurement of time over the past 500,000 years. Earth and Planetary Science Letters 81, 175–191.CrossRefGoogle Scholar
Edwards, R.L., Chen, J.H., Ku, T.L., (1987). Precise timing of the last interglacial period from mass spectrometric determination of Thorium-230 in corals. Science 236, 1547–1551.CrossRefGoogle ScholarPubMed
Farrant, A.R., Smart, P.L., Whitaker, F.F., Tarling, D.H., (1995). Long-term quaternary uplift rates inferred from limestone caves in Sarawak, Malaysia. Geology 23, 357–360.Google Scholar
Ford, D.C., Thompson, P., Schwarcz, H.P., (1972). Dating cave calcite deposits by uranium disequilibrium method. Some preliminary results from Crowsnest Pass, Alberta. Yatsu, E., Falconer, A., Research Methods in Pleistocene Geomorphology University of Guelph, Guelph, Ontario., 247–255.Google Scholar
Ford, D.C., Schwarcz, H.P., Drake, J.J., Gascoyne, M., Harmon, R.S., Latham, A.G., (1981). Estimates of the age of the existing relief within the southern rocky mountains of Canada. Arctic and Alpine Research 13, 1–10.CrossRefGoogle Scholar
Granger, D.E., Kirchner, J.W., Finkel, R.C., (1997). Quaternary downcutting rate of the New River, Virginia, measured from differential decay of cosmogenic 26Al and 10Be in cave-deposited alluvium. Geology 25, 107–110.2.3.CO;2>CrossRefGoogle Scholar
Granger, D.E., Fabel, D., Palmer, A.N., (2001). Pliocene–Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments. Geological Society of America Bulletin 113, 825–836.2.0.CO;2>CrossRefGoogle Scholar
Imbria, J., Hays, J.D., Martinson, D.G., Mcintyre, A., Mix, A.C., Chorley, J.J., Pisias, N.G., Prell, W.L., Shackleton, N.J., (1984). The orbital theory of Pleistocene climate: support from a revised chronology of the marine δ18O record. Berger, A.L., Milankovich and Climate, Reidel, Dordrecht., 12–23.Google Scholar
Ku, T., Joshi, L.U., (1980). Dating terrestrial carbonate cementation with uranium-series isotopes. Patel, B., Management of Environment Wiley Eastern, Bombay., 551–557.Google Scholar
Laurizen, S.E., Abbot, J., Arnesen, R., Crossley, G., Grepperund, D., Ive, A., Johnson, S., (1985). Morphology and hydraulics of an active phreatic conduit. Cave Science, Transactions of British Cave Research Association 12, 139–146.Google Scholar
Luo, S.D., Ku, T.L., (1991). U-series isochron dating: a generalized method employing total-sample dissolution. Geochemica et Cocmochemica Acta 55, 555–564.CrossRefGoogle Scholar
Pan, B.T., Burbank, D., Wang, Y., Wu, G., Li, J.J., Guan, Q., (2003). A 900 k.y. record of strath terrace formation during glacial–interglacial transition in northwest China. Geology 31, 957–960.Google Scholar
Peltzer, G., Tapponnier, P., Zhang, Z., Xu, Z.Q., (1985). Neogene and Quaternary faulting in and along the Qinling Shan. Nature 317, 500–505.CrossRefGoogle Scholar
Saswsky, I.D., White, W.B., Schmidt, V.A., (1995). Determination of stream-incision rate in the Appalachian plateaus by using cave-sediment magnetostratigraghy. Geology 23, 415–418.Google Scholar
Schmidt, V.A., (1982). Magnetostratigraghy of sediments in Mammoth Cave, Kentucky. Science 217, 827–829.Google Scholar
Stock, G.M., Anderson, R.S., Finkel, R.C., (2004). Pace of landscape evolution in the Sierra Nevada, California. Geology 32, 193–196.Google Scholar
Teng, Z.H., Wang, X.H., (1996). The study of uplifts of Qinling orogenic belt in the Cenozoic and their effects on the regional environment. Shanxi Geology 14, 2 33–41.In Chinese.Google Scholar
The Second Hydrogeology Team of Shanxi Geological Bureau(1979). The Hydrogeological Map and Its Instruction. Geological Press, Beijing., 1–20.(In chinese).Google Scholar
Thompson, R., Maher, B.A., (1995). Age models, sediment fluxes and palaeoclimatic reconstructions for the Chinese loess and palaeosol sequences. Geophysical Journal of International 123, 611–622.CrossRefGoogle Scholar
Xue, F., Lerch, F.M., KrÖner, A., Reischmann, T., (1996). Tectonic evolution of the East Qinling Mountains, China, in the Palaeozoic: a review and new tectonic model. Tectonophysics 253, 271–284.CrossRefGoogle Scholar
Young, R., McDougall, I., (1993). Long-term landscape evolution: early miocene and modern rivers in southern New South Wales, Australia. Journal of Geology 101, 35–49.CrossRefGoogle Scholar
Yuan, D.X., Cai, G.H., (1988). Karst Environment. Chongqin Press, Chongqing., 79–88.In Chinese.Google Scholar
Zhang, P., Molnar, P., Downs, W.R., (2001). Increased sedimentation rates and grain sizes 2–4 Myr ago due to the influence of climate change on erosion rates. Nature 410, 891–897.Google Scholar