Different provenance of separate loess sites in Yangtze River Basin and its paleoenvironmental implications
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摘要
The dust deposits in the Yangtze River Basin(YRB) have been widely distributed along the Yangtze River valley. Previous studies mainly concentrated in its provenance of each loess site,however, the differences in provenance of loess among different sites in this area have rarely been studied. Here, the geochemical characteristics of the<20 μm fraction in the loess in separate Jiujiang,Xuancheng and Nanjing sites were analyzed. The result shows that the loess in Jiujiang and Nanjing sites, near Yangtze River riverway, share similar geochemical characteristics that may commonly derived from the detrital materials of Yangtze River.However, both sites have significantly different elemental compositions compared with Xuancheng site, which is ～60 km away from the Yangtze River riverway. These sites share different geochemical characteristics with Eastern Qinling Mountains and Xifeng section on the Chinese Loess Plateau, North China. Combining the distribution of the aeolian sand hills and the loess in this area published by previous studies, we suggest that the exposed river valley floodplain caused by weak summer monsoon provided abundant materials to form local dust cells controlled by strong winter monsoon during the glacial periods. Therefore, those local loess deposits should be identified as the "valley-sourced loess".These reveal the inherent connection between the monsoon system and the loess deposits in Yangtze River Basin.
The dust deposits in the Yangtze River Basin(YRB) have been widely distributed along the Yangtze River valley. Previous studies mainly concentrated in its provenance of each loess site,however, the differences in provenance of loess among different sites in this area have rarely been studied. Here, the geochemical characteristics of the<20 μm fraction in the loess in separate Jiujiang,Xuancheng and Nanjing sites were analyzed. The result shows that the loess in Jiujiang and Nanjing sites, near Yangtze River riverway, share similar geochemical characteristics that may commonly derived from the detrital materials of Yangtze River.However, both sites have significantly different elemental compositions compared with Xuancheng site, which is ～60 km away from the Yangtze River riverway. These sites share different geochemical characteristics with Eastern Qinling Mountains and Xifeng section on the Chinese Loess Plateau, North China. Combining the distribution of the aeolian sand hills and the loess in this area published by previous studies, we suggest that the exposed river valley floodplain caused by weak summer monsoon provided abundant materials to form local dust cells controlled by strong winter monsoon during the glacial periods. Therefore, those local loess deposits should be identified as the "valley-sourced loess".These reveal the inherent connection between the monsoon system and the loess deposits in Yangtze River Basin.
The dust deposits in the Yangtze River Basin(YRB) have been widely distributed along the Yangtze River valley. Previous studies mainly concentrated in its provenance of each loess site,however, the differences in provenance of loess among different sites in this area have rarely been studied. Here, the geochemical characteristics of the<20 μm fraction in the loess in separate Jiujiang,Xuancheng and Nanjing sites were analyzed. The result shows that the loess in Jiujiang and Nanjing sites, near Yangtze River riverway, share similar geochemical characteristics that may commonly derived from the detrital materials of Yangtze River.However, both sites have significantly different elemental compositions compared with Xuancheng site, which is ～60 km away from the Yangtze River riverway. These sites share different geochemical characteristics with Eastern Qinling Mountains and Xifeng section on the Chinese Loess Plateau, North China. Combining the distribution of the aeolian sand hills and the loess in this area published by previous studies, we suggest that the exposed river valley floodplain caused by weak summer monsoon provided abundant materials to form local dust cells controlled by strong winter monsoon during the glacial periods. Therefore, those local loess deposits should be identified as the "valley-sourced loess".These reveal the inherent connection between the monsoon system and the loess deposits in Yangtze River Basin.
引文
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Broecker WS,Peng TH(1982)Tracers in the Sea.Eldigio Press,New York.https://doi.org/10.2307/1309641
Bhatia MR,Crook KA W(1986)Trace element characteristics of graywackes and tectonic setting discrimination of sedimentary basins.Contributions to Mineralogy Petrology 92:181-193.https://doi.org/10.1007/BF00375292
Barth MG,Mcdonough WF,Rudnick RL(2000)Tracking the budget of Nb and Ta in the continental crust.Chemical Geology 165:197-213.https://doi.org/10.1016/S0009-2541(99)00173-4
Cox R,Lowe DR,Cullers RL(1995)The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States.Geochimica&Cosmochimica Acta 59:2919-2940.https://doi.org/10.1016/0016-7037(95)00185-9
Chen YY,Li XS,Han ZY,et al.(2008)Chemical weathering intensity and element migration feature of the Xiashu loess profile in Zhengjiang,Jiangsu Province.Journal of Geographical Sciences 18:341-352.https://doi.org/10.1007/s11442-008-0341-9
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Ding Z,Liu T,Rutter NW,et al.(1995)Ice-volume forcing of East Asian winter monsoon variations in the past 800,000years.Quaternary Research 44:149-159.https://doi.org/10.1006/qres.1995.1059
Gallet S,Jahn BM,Torii M.(1996)Geochemical characterization of the Luochuan loess-paleosol sequence,China,and paleoclimatic implications.Chemical Geology 133:67-88.https://doi.org/10.1016/S0009-2541(96)00070-8
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García R,Petitdomínguez MD,Rucandio MI,et al.(2011)Provenance of loess from the Spanish central region:chemometric interpretation.Geological Magazine 148:481-491.https://doi.org/10.1017/s0016756810000889
Guo ZT(2017)Loess Plateau attests to the onsets of monsoon and deserts.Scientia Sinica Terrae 47:421-437.(In Chinese)https://doi.org/10.1360/N072017-00037
Hao QZ,Guo ZT,Qiao YS,et al.(2010)Geochemical evidence for the provenance of middle Pleistocene loess deposits in southern China.Quaternary Science Review 29:3317-3326.https://doi.org/10.1016/j.quascirev.2010.08.004
Hong HL,Wang CW,Zeng KF,et al.(2013)Geochemical constraints on provenance of the mid-Pleistocene red earth sediments in subtropical China.Sedimentary Geology 290:97-108.https://doi.org/10.1016/j.sedgeo.2013.03.008
Hu XF,Gong AT(1999)A"Yellow Cap"on Quaternary Red Clay in Jiujiang,jiangxi Province.Pedosphere 9:311-318.
Hu YP,Jia YL,Zhang Z,et al.(2013)Sand loess system in the middle reaches of Yangtze River since late Interglacial indicated by Grain Size.Journal of Desert Research 33:1324-1332.(In Chinese)https://doi.org/10.7522/j.issn.1000-694X.2013.00137
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Liu TS(1985)Loess and the Environment Beijing:Science Press.pp 1-412.(In Chinese)
Lai ZP,Zhou J,Xia YF,et al.(2001)Luminescence dating of Xiashu loess in Nanjing.Progress Nature Science 11:203-207.(In Chinese)https://doi.org/10.3321/j.issn:1002-008X.2001.02.016
Lai ZP,Zhang WG,Chen X,et al.(2010)OSL chronology of loess deposits in East China and its implications for East Asian monsoon history.Quaternary Geochronology 5:154-158.https://doi.org/10.1016/j.quageo.2009.02.006
Li XG,He JH,Li DS,et al.(1993)The preliminary test of ESR in Xiashu loess dating Journal of Nanjing Normal university(Natural Science)3:86-91.(In Chinese)
Li XS,Han ZY,Yang DY et al.(2006)Aeolian-dust deposit to the southwest of the Poyang lake during the last glacial age.Marine Geology&Quaternary Geology 25:101-108.(In Chinese)
Li JW,Qiao YS,Wang Y,et al.(2009)Aeolian origin of the red earth formation in Jiujian city of Jiagxi province,China:evidence from grain size analysis.Journal of Geomechanics 15:95-104.(In Chinese)https://doi.org/10.3969/j.issn.1006-6616.2009.01.009
Li XS,Han ZY,Lu HY,et al.(2018)Onset of Xiashu loess deposition in southern China by 09 Ma and its implications for regional aridification.Science China Earth Sciences 61:256-269.https://doi.org/10.1007/s11430-017-9134-2
Li N,Hao QZ,Zhang XJ,et al.(2016)Geochemical evidence for the provenance of loess deposits in the eastern mountains,central China.Quaternary Sciences 36:332-346.(In Chinese)https://doi.org/10.11928/j.issn.1001-7410.2016.02.09
Li GJ,Li L,Xu SJ,et al.(2017)Dust source of the loess deposits in the eastern china constrained by uranium comminution age.Quaternary Sciences 37:1037-1044.(In Chinese)https://doi.org/10.11928.j/issn.1001-7410.2017.05.11
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Meng X,Liu L,Balsam W,et al.(2015)Dolomite abundance in Chinese loess deposits:A new proxy of monsoon precipitation intensity.Geophysical Research Letters 42(10):391-310,398.https://doi.org/10.1002/2015GL066681
Meng X,Liu L,Wang XT,et al.(2018)Mineralogical evidence of reduced East Asian summer monsoon rainfall on the Chinese loess plateau during the early Pleistocene interglacials.Earth and Planetary Science Letters 486:61-69.https://doi.org/10.1016/j.epsl.2017.12.048
Meng X,Liu L,Zhao W,et al.(2019)Distant Taklimakan Desert as an important source of aeolian deposits on the Chinese Loess Plateau as evidenced by carbonate minerals.Geophysical Research Letters 46(9):4854-4862.https://doi.org/10.1029/2018GL081551
Muhs DR,Bettis III EA.(2003)Quaternary loess-paleosol sequences as examples of climate-driven sedimentary extremes.Geological Society of America 370:53-74.https://doi.org/10.1130/0-8137-2370-1.53
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Chen YY,Li XS,Han ZY,et al.(2008)Chemical weathering intensity and element migration feature of the Xiashu loess profile in Zhengjiang,Jiangsu Province.Journal of Geographical Sciences 18:341-352.https://doi.org/10.1007/s11442-008-0341-9
Chen J,Li GJ(2011)Geochemical studies on the source region of Asian dust.Science China Earth Sciences 54:1279-1301.(In Chinese)https://doi.org/10.1007/s11430-011-4269-z
Chen J,Li G,Yang J,et al.(2007)Nd and Sr isotopic characteristics of Chinese deserts:Implications for the provenances of Asian dust.Geochimica et Cosmochimica Acta71:3904-3914.https://doi.org/10.1016/j.gca.2007.04.033
Ding Z,Liu T,Rutter NW,et al.(1995)Ice-volume forcing of East Asian winter monsoon variations in the past 800,000years.Quaternary Research 44:149-159.https://doi.org/10.1006/qres.1995.1059
Gallet S,Jahn BM,Torii M.(1996)Geochemical characterization of the Luochuan loess-paleosol sequence,China,and paleoclimatic implications.Chemical Geology 133:67-88.https://doi.org/10.1016/S0009-2541(96)00070-8
Guan QY,Pan BT,Gao HS,et al.(2008)Geochemical evidence of the Chinese loess provenance during the Late Pleistocene.Palaeogeography,Palaeoclimatology,Palaeoecology 270:53-58.https://doi.org/10.1016/j.palaeo.2008.08.013
García R,Petitdomínguez MD,Rucandio MI,et al.(2011)Provenance of loess from the Spanish central region:chemometric interpretation.Geological Magazine 148:481-491.https://doi.org/10.1017/s0016756810000889
Guo ZT(2017)Loess Plateau attests to the onsets of monsoon and deserts.Scientia Sinica Terrae 47:421-437.(In Chinese)https://doi.org/10.1360/N072017-00037
Hao QZ,Guo ZT,Qiao YS,et al.(2010)Geochemical evidence for the provenance of middle Pleistocene loess deposits in southern China.Quaternary Science Review 29:3317-3326.https://doi.org/10.1016/j.quascirev.2010.08.004
Hong HL,Wang CW,Zeng KF,et al.(2013)Geochemical constraints on provenance of the mid-Pleistocene red earth sediments in subtropical China.Sedimentary Geology 290:97-108.https://doi.org/10.1016/j.sedgeo.2013.03.008
Hu XF,Gong AT(1999)A"Yellow Cap"on Quaternary Red Clay in Jiujiang,jiangxi Province.Pedosphere 9:311-318.
Hu YP,Jia YL,Zhang Z,et al.(2013)Sand loess system in the middle reaches of Yangtze River since late Interglacial indicated by Grain Size.Journal of Desert Research 33:1324-1332.(In Chinese)https://doi.org/10.7522/j.issn.1000-694X.2013.00137
Jia YL,Lai ZP,Zhang JR,et al.(2012)Chronology and provenance of aeolian sediments in the middle reaches of the Yangtze River in China.Quaternary Geochronology 10:44-49.https://doi.org/10.1016/j.quageo.2012.01.011
Liu TS(1985)Loess and the Environment Beijing:Science Press.pp 1-412.(In Chinese)
Lai ZP,Zhou J,Xia YF,et al.(2001)Luminescence dating of Xiashu loess in Nanjing.Progress Nature Science 11:203-207.(In Chinese)https://doi.org/10.3321/j.issn:1002-008X.2001.02.016
Lai ZP,Zhang WG,Chen X,et al.(2010)OSL chronology of loess deposits in East China and its implications for East Asian monsoon history.Quaternary Geochronology 5:154-158.https://doi.org/10.1016/j.quageo.2009.02.006
Li XG,He JH,Li DS,et al.(1993)The preliminary test of ESR in Xiashu loess dating Journal of Nanjing Normal university(Natural Science)3:86-91.(In Chinese)
Li XS,Han ZY,Yang DY et al.(2006)Aeolian-dust deposit to the southwest of the Poyang lake during the last glacial age.Marine Geology&Quaternary Geology 25:101-108.(In Chinese)
Li JW,Qiao YS,Wang Y,et al.(2009)Aeolian origin of the red earth formation in Jiujian city of Jiagxi province,China:evidence from grain size analysis.Journal of Geomechanics 15:95-104.(In Chinese)https://doi.org/10.3969/j.issn.1006-6616.2009.01.009
Li XS,Han ZY,Lu HY,et al.(2018)Onset of Xiashu loess deposition in southern China by 09 Ma and its implications for regional aridification.Science China Earth Sciences 61:256-269.https://doi.org/10.1007/s11430-017-9134-2
Li N,Hao QZ,Zhang XJ,et al.(2016)Geochemical evidence for the provenance of loess deposits in the eastern mountains,central China.Quaternary Sciences 36:332-346.(In Chinese)https://doi.org/10.11928/j.issn.1001-7410.2016.02.09
Li GJ,Li L,Xu SJ,et al.(2017)Dust source of the loess deposits in the eastern china constrained by uranium comminution age.Quaternary Sciences 37:1037-1044.(In Chinese)https://doi.org/10.11928.j/issn.1001-7410.2017.05.11
Liu J,Wu XH,Li SQ,et al.(1997)The last glacial stratigraphic sequence,depositional environment and climatic fluctuations from the aeolian sand dune in Hongguang,Pengze,Jiangxi(China).Quaternary science Reviews 16:535-546.https://doi.org/10.1016/S0277-3791(96)00074-1
Liu F,Li GJ,Chen J(2014)U-Pb ages of zircon grains reveal a proximal dust source of the Xiashu loess,Lower Yangtze River region.China Science Bulletin 59:2391-2395.https://doi.org/10.1007/s11434-014-0318-2
Meng X,Liu L,Balsam W,et al.(2015)Dolomite abundance in Chinese loess deposits:A new proxy of monsoon precipitation intensity.Geophysical Research Letters 42(10):391-310,398.https://doi.org/10.1002/2015GL066681
Meng X,Liu L,Wang XT,et al.(2018)Mineralogical evidence of reduced East Asian summer monsoon rainfall on the Chinese loess plateau during the early Pleistocene interglacials.Earth and Planetary Science Letters 486:61-69.https://doi.org/10.1016/j.epsl.2017.12.048
Meng X,Liu L,Zhao W,et al.(2019)Distant Taklimakan Desert as an important source of aeolian deposits on the Chinese Loess Plateau as evidenced by carbonate minerals.Geophysical Research Letters 46(9):4854-4862.https://doi.org/10.1029/2018GL081551
Muhs DR,Bettis III EA.(2003)Quaternary loess-paleosol sequences as examples of climate-driven sedimentary extremes.Geological Society of America 370:53-74.https://doi.org/10.1130/0-8137-2370-1.53
Muhs DR,Bettis EA,Aleinikoff JN,et al.(2008)Origin and paleoclimatic significance of late Quaternary loess in Nebraska:Evidence from stratigraphy,chronology,sedimentology,and geochemistry.Geological Society of America Bulletin 120:1378-1407.https://doi.org/10.1130/B26221.1
Muhs DR,Bettis III,EA.(2000)Geochemical variations in Peoria Loess of western Iowa indicate paleowinds of midcontinental North America during last glaciation.Quaternary Research 53:49-61.https://doi.org/10.1006/qres.1999.2090
Muhs DR(2013)The geologic records of dust in the Quaternary.Aeolian Research 9:3-48.https://doi.org/10.1016/j.aeolia.2012.08.001
Muhs DR,Budahn JR,Skipp GL,et al.(2016)Geochemical evidence for seasonal controls on the transportation of Holocene loess,Matanuska Valley,southern Alaska,USA.Aeolian Research 21:61-73.https://doi.org/10.1016/j.aeolia.2016.02.005
Muhs DR.(2018)The geochemistry of loess:Asian and North American deposits compared.Journal of Asian Earth Sciences155:81-115.https://doi.org/10.1016/j.jseaes.2017.10.032
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