Abstract
A geological feature in the Qaidam Basin known as the “Shell Bar” contains millions of freshwater clam shells buried in situ. Since the 1980s, this feature in the now hyper-arid basin has been interpreted to be lake deposits that provide evidence for a warmer and more humid climate than present during late marine isotope stage 3 (MIS 3). Global climate during late MIS 3 and the last glacial maximum, however, was cold and dry, with much lower sea levels. We re-investigated the feature geomorphologically and sedimentologically, and employed optically stimulated luminescence (OSL) dating to verify the chronology of the sediments. We interpret the Shell Bar to be a remnant of a river channel formed by a stream that ran across an exposed lake bed during a regressive lake phase. Deflation of the surrounding older, fine-grained lacustrine deposits has left the fluvial channel sediments topographically inverted, indicating the erosive nature of the landscape. Luminescence ages place the formation of the Shell Bar in MIS 5 (~113–99 ka), much older than previous radiocarbon ages of <40 ka BP, but place the paleoclimatic inferences more in accord with other regional and global climate proxy records. We present a brief review of the age differences derived from 14C and OSL dating of some critical sections that were thought to represent a warmer and more humid climate than present during late MIS 3. We attribute the differences to underestimation of 14C ages. We suggest that 14C ages older than ~25 ka BP may require re-investigation, especially dates on samples from arid regions.
Similar content being viewed by others
References
Aitken MJ (1998) An introduction to optical dating: the dating of Quaternary sediments by the use of photon-stimulated luminescence. Oxford University Press, Oxford
Bird MI, Turney CSM, Fifield LK, Smith MA, Miller GH, Roberts RG, Magee JW (2003) Radiocarbon dating of organic- and carbonate carbon in Genyornis and Dromaius eggshell using stepped combustion and stepped acidification. Quat Sci Rev 22:1805–1812
Bowler JM, Huang Q, Chen KZ, Head MJ, Yuan BY (1986) Radiocarbon dating of playa-lake hydrological changes: examples from northwestern China and central Australia. Palaeogeogr Palaeoclimatol Palaeoecol 54:241–260
Briant RM, Bateman MD (2009) Luminescence dating indicates radiocarbon age underestimation in Late Pleistocene fluvial deposits from eastern England. J Quat Sci 24:916–927
Chen KZ, Bowler JM (1985) Preliminary study of sedimentary characteristics and evolution of palaeoclimate of Qarhan salt lake in Qaidam Basin. Sci Sin B 28:1218–1232
Chen K, Bowler JM (1986) Late Pleistocene evolution of salt lakes in the Qaidam Basin, Qinghai Province, China. Palaeogeogr Palaeoclimatol Palaeoecol 54:87–104
Chen K, Bowler JM, Kelts K (1990) Palaeoclimatic evolution within the Qinghai-Xizang (Tibet) Plateau in the last 40000 years. Quat Sci 3:21–31 (in Chinese with English abstract)
Chen FH, Fan Y, Chun X, Madsen DB, Oviatt CG, Zhai H, Yang LP, Sun Y (2008) Preliminary research on megalake Jilantai-Hetao in the arid areas of China during the Late Quaternary. Chin Sci Bull 53:1725–1739
Colman SM, Yu SY, An Z, Shen J, Henderson ACG (2007) Late Cenozoic climate changes in China’s western interior: a review of research on Lake Qinghai and comparison with other records. Quat Sci Rev 26:2281–2300
Duller GAT (2003) Distinguishing quartz and feldspar in single grain luminescence measurements. Radiat Meas 37:161–165
Fan QS, Lai ZP, Long H, Sun YJ, Liu XJ (2010) OSL chronology for lacustrine sediments recording high stands of Gahai Lake in Qaidam Basin, Northeastern Qinghai–Tibetan Plateau. Quat Geochron 5:223–227
Fang X, Ono Y, Fukusawa H, Pan B, Li J, Guan D, Oi K, Tsukamoto S, Torii M, Mishima T (1999) Asian summer monsoon instability during the past 60,000 years: magnetic susceptibility and pedogenic evidence from the western Chinese Loess Plateau. Earth Planet Sci Lett 168:219–232
Hartmann K, Wünnemann B, Hölz S, Kraetschell A, Zhang H (2011) Neotectonic constraints on the Gaxun Nur inland basin in north-central China, derived from remote sensing, geomorphology and geophysical analyses. Geol Soc London Spec Pub 353:221–233
Herzschuh U (2006) Palaeo-moisture evolution in monsoonal Central Asia during the last 50,000 years. Quat Sci Rev 25:163–178
Huang Q, Cai BQ (1987) Geochronological study on the sediments in Qarhan Lake. Proceedings of the Sino-Australian Quaternary meeting, 106–114 (in Chinese with English abstract)
Huang Q, Cai BQ, Yu JQ (1981) The 14C age and cycle of sedimentation of some saline lakes on the Qinghai-Xizang Plateau. Chin Sci Bull 26:66–70
Huang WW, Chen KZ, Yuan BY (1987) Paleolithics of Xiao Qaidam Lake in Qinghai Province in China. Proceedings of the Sino-Australian Quaternary meeting, pp 168–172 (in Chinese)
Huang Q, Meng ZQ, Liu HL (1990) A preliminary study on the climatic change pattern of the Chaerhan Lake in the Qaidam Basin. Sci China 6:652–663 (in Chinese)
Imbrie J, Hays JD, Martinson DC, McIntyre A, Mix AC, Morley JJ, Pisias NG, Prell WL, Shackleton NJ (1984) The orbital theory of Pleistocene climate: support from the revised chronology of the marine δ18O record. In: Berger AL, Imbrie J, Hays J, Kukla G, Saltzman B (eds) Milankovich and Climate Part I. Reidel, Dordrecht, pp 269–305
Jiang H, Mao X, Xu H, Thompson J, Wang P, Ma X (2011) Last glacial pollen record from Lanzhou (northwestern China) and possible forcing mechanisms for the MIS 3 climate change in Middle to East Asia. Quat Sci Rev 30:769–781
Lai ZP (2006) Testing the use of an OSL standardized growth curve (SGC) for De determination on quartz from the Chinese Loess Plateau. Radiat Meas 41:9–16
Lai ZP (2010) Chronology and the upper dating limit for loess samples from Luochuan section in Chinese Loess Plateau using quartz OSL SAR protocol. J Asian Earth Sci 37:176–185
Lai ZP (2012) Was late marine isotope stage (MIS) 3 warm and humid in nowadays arid northwestern China? Quat Int 279–280:261
Lai ZP, Brückner H (2008) Effects of feldspar contamination on equivalent dose and the shape of growth curve for OSL of silt-sized quartz extracted from Chinese loess. Geochronometria 30:49–53
Lai ZP, Brückner H, Zöller L, Fülling A (2007a) Existence of a common growth curve for silt-sized quartz OSL of loess from different continents. Radiat Meas 42:1432–1440
Lai ZP, Wintle AG, Thomas DSG (2007b) Rates of dust deposition between 50 ka and 20 ka revealed by OSL dating at Yuanbao on the Chinese Loess Plateau. Palaeogeogr Palaeoclimatol Palaeoecol 248:431–439
Lai ZP, Zöller L, Fuchs M, Brückner H (2008) Alpha efficiency determination for OSL of quartz extracted from Chinese loess. Radiat Meas 43:767–770
Lehmkuhl F, Haselein F (2000) Quaternary paleoenvironmental change on the Tibetan Plateau and adjacent areas (Western China and Western Mongolia). Quat Int 65–66:121–145
Li SJ, Li SD (1991) The study on two cores from Tianshuihai in the west Kunlun and its implications. J Glaciol Geocryol 13:187–188 (in Chinese)
Li BY, Zhu LP (2001) “Greatest lake period” and its palaeo-environment on the Tibetan Plateau. J Geograph Sci 11:34–42
Li BX, Cai BQ, Liang QS (1989) The sedimentological characteristics of Aiding lake in the Turpan Basin in west China. Chin Sci Bull 8:608–610 (in Chinese)
Li BY, Zhang QS, Wang FB (1991) Evolution of the lake in Karakorum-west Kunlun Mountains. Quat Sci 1:64–71 (in Chinese with English abstract)
Li SJ, Zhang HL, Shi YF, Zhu ZY (2008) A high resolution MIS 3 environmental change record derived from lacustrine deposit of Tianshuihai Lake. Quat Sci 28:122–131 (in Chinese with English abstract)
Liu XJ, Lai ZP (2010) Lake level fluctuations in Qinghai Lake in the Qinghai-Tibetan Plateau since the last interglaciation: a brief review and new data. J Earth Environ 1:79–89 (in Chinese with English abstract)
Liu ZC, Wang YJ, Chen Y, Li XS, Li QC (1998) Magnetostratigraphy and sedimentologically derived geochronology of the Quaternary lacustrine deposits of a 3000 m thick sequence in the central Qaidam Basin, Western China. Palaeogeogr Palaeoclimatol Palaeoecol 140:459–473
Liu XJ, Lai ZP, Fan QS, Long H, Sun YJ (2010) Timing for high lake levels of Qinghai Lake in the Qinghai-Tibetan Plateau since the last interglaciation based on quartz OSL dating. Quat Geochron 5:218–222
Liu XJ, Lai ZP, Yu LP, Sun YJ, Madsen D (2012) Luminescence chronology of aeolian deposits from the Qinghai Lake area in the Northeastern Qinghai-Tibetan Plateau and its palaeoenvironmental implications. Quat Geochron 10:37–43
Long H, Lai ZP, Fuchs M, Zhang JR, Yang LH (2012a) Palaeodunes intercalated in loess strata from the western Chinese Loess Plateau: timing and palaeoclimatic implications. Quat Int 263:37–45
Long H, Lai ZP, Fuchs M, Zhang JR, Li Y (2012b) Timing of Late Quaternary palaeolake evolution in Tengger Desert of northern China and its possible forcing mechanisms. Global Planet Change 92–93:119–129
Madsen DB, Ma H, Rhode D, Brantingham PJ, Forman SL (2008) Age constraints on the late Quaternary evolution of Qinghai Lake, Tibetan Plateau. Quat Res 69:316–325
Madsen DB, Lai ZP, Sun YJ, Rhode D, Liu XJ, Brantingham PJ (2013) Late Quaternary Qaidam lake histories and implications for an MIS 3 “Greatest Lakes” period in northwest China. J Paleolimnol. doi:10.1007/s10933-012-9662-x
Mischke S, Lai ZP, Zhang CJ (2013) Re-assessment of the paleoclimate implications of the Shell Bar in the Qaidam Basin, China. J Paleolimnol. doi:10.1007/s10933-012-9674-6
Mischke S, Sun Z, Herzschuh U, Qiao Z, Sun N (2010) An ostracod-inferred large Middle Pleistocene freshwater lake in the presently hyper-arid Qaidam Basin (NW China). Quat Int 218:74–85
Murray AS, Wintle AG (2000) Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol. Radiat Meas 32:57–73
Murray AS, Wintle AG (2003) The single aliquot regenerative dose protocol: potential for improvements in reliability. Radiat Meas 37:377–381
Ning Y, Liu W, An Z (2009) A 130-ka reconstruction of precipitation on the Chinese Loess Plateau from organic carbon isotopes. Palaeogeogr Palaeoclimatol Palaeoecol 270:59–64
Ou XJ, Lai ZP, Zeng LH, Zhou SZ (2012) OSL dating of glacial sediments from the Qinghai-Tibetan Plateau and its bordering mountains: a review and methodological suggestions. J Earth Environ 3:829–842
Oviatt CG, Madsen DB, Schmitt DN (2003) Late Pleistocene and early Holocene rivers and wetlands in the Bonneville Basin of western North America. Quat Res 60:200–210
Pachur HJ, Wünnemann B, Zhang HC (1995) Lake evolution in the Tengger Desert, Northwestern China, during the last 40000 years. Quat Res 44:171–180
Pigati JS, Quade J, Wilson J, Jull AJT, Lifton NA (2007) Development of low-background vacuum extraction and graphitization systems for 14C dating of old (40–60 ka) samples. Quat Int 166:4–14
Prell WE, Kutzbach JE (1987) Monsoon variability over the past 150,000 years. J Geophys Res 92:8411–8425
Prescott JR, Hutton JT (1994) Cosmic ray contributions to dose rates for luminescence and ESR dating: large depths and long-term time variations. Radiat Meas 23:497–500
Rhode D, Ma HZ, Madsen DB, Brantingham PJ, Forman SL, Olsen JW (2010) Paleoenvironmental and archaeological investigation at Qinghai Lake, western China: geomorphic and chronometric evidence of lake level history. Quat Int 218:29–44
Rhodes TE, Gasse F, Lin RF, Fontes JC, Wei K, Bertrand P, Gibert E, Melieres F, Tucholka P, Wang Z, Chen Z (1996) A Late Pleistocene-Holocene lacustrine record from Lake Manas, Zunggar (northern Xinjiang Western China). Palaeogeogr Palaeoclimatol Palaeoecol 120:105–125
Rick TC, Vellanoweth RL, Erlandson JM (2005) Radiocarbon dating and the “old shell” problem: direct dating of artifacts and cultural chronologies in coastal and other aquatic regions. J Archaeol Sci 32:1641–1648
Roberts HM, Duller GAT (2004) Standardised growth curves for optical dating of sediment using multiple-grain aliquots. Radiat Meas 38:241–252
Shi YF, Liu XD, Li BY, Yao TD (1999) A very strong summer monsoon event during 30–40 ka BP in the Qinghai-Xizang (Tibet) Plateau and its relation to precessional cycle. Chin Sci Bull 44:1851–1858
Shi Y, Yu G, Liu X, Li B, Yao T (2001) Reconstruction of the 30–40 ka BP enhanced Indian monsoon climate based on geological records from the Tibetan Plateau. Palaeogeogr Palaeoclimatol Palaeoecol 160:69–83
Shi XM, Li YL, Yang JC (2008) Climate and tectonic analysis of Manas Lake changes. Scientia Geograph Sin 28:266–271 (in Chinese with English abstract)
Simms AR, DeWitt R, Rodriguez AB, Lambeck K, Anderson JB (2009) Revisiting marine isotope stage 3 and 5a (MIS3–5a) sea levels within the northwestern Gulf of Mexico. Global Planet Change 66:100–111
Sun YJ, Lai ZP, Long H, Liu XJ, Fan QS (2010) Quartz OSL dating of archaeological sites in Xiao Qaidam Lake of the Qinghai–Tibetan Plateau and its implications for palaeoenvironmental changes. Quat Geochronol 5:360–364
Tang LY, Wang SL (1988) The pollen flora in the Gonghe formation of the Gonghe Basin in China. Acta Palaeontol Sin 27:583–608 (in Chinese with English abstract)
Thompson LG, Yao T, Davis ME, Henderson KA, Mosley-Thompson E, Lin P-N, Beer J, Synal H-A, Cole-Dai J, Bolzan JF (1997) Tropical climate instability: the last glacial cycle from a Qinghai-Tibetan ice core. Science 276:1821–1825
Wang FB, Ma CM, Xia XC, Cao QY, Zhu Q (2008) Environmental evolution in Lop Nur since Late Pleistocene and its response to the global changes. Quat Sci 28:150–153 (in Chinese with English abstract)
Webb GE, Price GJ, Nothdurft LD, Deer L, Rintoul L (2007) Cryptic meteoric diagenesis in freshwater bivalves: implications for radiocarbon dating. Geology 37:803–806
Yang X, Scuderi LA (2010) Hydrological and climatic changes in deserts of China since the Late Pleistocene. Quat Res 73:1–9
Yang B, Wang J, Shi Y, Braeuning A (2004) Evidence for a warm-humid climate in arid northwestern China during 40–30 ka BP. Quat Sci Rev 23:537–2548
Yang JF, Lu SW, Zhao H, Cui XF, Lü XH (2006) Lacustrine sediments’ U-series age and its significance in the Jiezechaka Lake of Tibet. J Earth Sci Environ 28:6–10 (in Chinese with English abstract)
Yi L, Lai ZP, Yu HJ, Xu XY, Su Q, Yao J, Wang XL, Shi XF (2013) Chronologies of sedimentary changes in the south Bohai Sea, China: constraints from luminescence and radiocarbon dating. Boreas 42:267–284
Yim WW-S, Ivanovich M, Yu K-F (1990) Young age bias of radiocarbon dates in pre-Holocene marine deposits of Hong Kong and implications for Pleistocene stratigraphy. Geo-Marine Lett 10:165–172
Yu LP, Lai ZP (2012) OSL chronology and palaeoclimatic implications of aeolian sediments in the eastern Qaidam Basin of the northeastern Qinghai-Tibetan Plateau. Palaeogeogr Palaeoclimatol Palaeoecol 337–338:120–129
Yu G, Gui F, Shi YF, Zheng YQ (2007) Late marine isotope stage 3 palaeoclimate for East Asia: a data-model comparison. Palaeogeogr Palaeoclimatol Palaeoecol 250:167–183
Yu LP, Lai ZP, Pan T, Han WX OSL chronology and paleoclimatic implications of paleodunes in the mid- and southwestern Qaidam Basin. Sci Cold Arid Regions (in press)
Zhang H, Lei G, Chang F, Fan H, Yang M, Zhang W (2007) Age determination of Shell Bar section in salt lake Qarhan. Qaidam Basin. Quat Sci 27:511–521 (in Chinese with English abstract)
Zhang H, Lei G, Chang F, Pu Y, Fan H, Lei Y, Yang M, Zhang W, Yang L (2008a) Chronology of the Shell Bar section and a discussion on the ages of the Late Pleistocene lacustrine deposits in the paleolake Qarhan, Qaidam basin. Front Earth Sci China 2:225–235
Zhang H, Wang Q, Peng J, Chen G (2008b) Ostracod assemblages and their paleoenvironmental significance from Shell Bar section of palaeolake Qarhan. Qaidam Basin. Quat Sci 28:103–111 (in Chinese with English abstract)
Zhang W, Zhang H, Lei G, Yang L, Niu J, Chang F, Yang M, Fan H (2008c) Elemental geochemistry and paleoenvironment evolution of Shell Bar section at Qarhan in the Qaidam Basin. Quat Sci 28:917–928 (in Chinese with English abstract)
Zhang JR, Lai ZP, Jia YL (2012) Luminescence chronology for late Quaternary lake levels of enclosed Huangqihai lake in East Asian monsoon marginal area in northern China. Quat Geochronol 10:123–128
Zhao XT, Zhang MP, Li DM (2009) Dating of the Sanchahe formation and development of paleolake Kunlun in Golmud city, Qinghai Province. Quat Sci 29:89–97 (in Chinese with English abstract)
Zheng M, Meng Y, Wei L (2000) Evidence of the pan-lake stage in the period of 40–28 k a BP on the Qinghai-Tibet Plateau. Acta Geol Sin 74:266–272
Zhou W, Head MJ, Wang F, Donahue DJ, Jull AJT (1999) The reliability of AMS radiocarbon dating of shells from China. Radiocarbon 41:17–24
Zhu DG, Meng XG, Zhao XT, Shao ZG, Xu ZF, Yang CB, Ma ZB, Wu ZH, Wu ZH, Wang JP (2004) Evolution of an ancient large lake in the southeast of the northern Tibetan Plateau. Acta Geol Sin 78:982–992
Acknowledgments
We thank two anonymous reviewers and the editor Mark Brenner for constructive comments. This work was supported by China NSF (41290252, 41121001), a SKLCS grant (SKLCS-ZZ-2012-01-04), and the One-Hundred Talent Project of CAS granted to ZPL (A0961).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lai, Z., Mischke, S. & Madsen, D. Paleoenvironmental implications of new OSL dates on the formation of the “Shell Bar” in the Qaidam Basin, northeastern Qinghai-Tibetan Plateau. J Paleolimnol 51, 197–210 (2014). https://doi.org/10.1007/s10933-013-9710-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10933-013-9710-1