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Environmental evolution in the salt-water intrusion area south of Laizhou Bay since late pleistocene

Journal of Geographical Sciences 2008年第1期18卷 37-45页

作者： ZHANG Zulu LIU Enfeng ZHANG Yan XIN Liangjie Geography Department of Shandong Normal University Jinan 250014 China Nanjing Institute of Geography ＆ Limnology CAS Nanjing 210008 China Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China

The south coastal plain of Laizhou Bay is one of the typical salt-water intrusion areas in China, the occurrence and development of which was closely related with the palaeoenvironment evolution. Systematic analyses of pollen, foraminifera and grain size composition based on ^14C and luminescence dating from two sediment cores were performed for the purpose of understanding the salt-water intrusion in the coastal plain of Laizhou Bay from the perspective of environmental evolution since late pleistocene. It could be classified into seven evolution stages since 120 kaBP： 120-85 kaBP was a transition period from cold to warm; 85-76 kaBP was a period with warm and wet climate having swamp lakes developed in the lower reaches of the Weihe River, south coastal plain of Laizhou Bay; 76-50 kaBP was characterized by grassland vegetation and coarse sediments in terrestrial environment, which was the early stage of Dali Ice-Age; 50-24 kaBP was a period with alternate sea deposition in the south coastal plain of Laizhou Bay; 24-10 kaBP was the late stage of Dali Ice-Age with coldest period of Quaternary, the south coastal plain of Laizhou Bay was dry grassland and loess deposition environment; 10-4 kaBP was another warm and wet climate period, sea level was high and regressed at 4 kaBP; and has been the modern sedimentary environment since 4 kaBP. Among the three warm stages, including 85-76 kaBP, 50-24 kaBP and 10-4 kaBP, corresponded to late Yangkou, Guangrao and Kenli seawater transgression respectively. The duration of the latter one in south coastal plain of Laizhou Bay was longer than that in west coast of Bohai Sea and east coast of Laizhou Bay. The three periods of seawater transgression formed the foundation of salt-water intrusion in this area.

关键词： environmental evolution salt-water intrusion late pleistocene south coastal plain of Laizhou Bay, China

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A FOSSIL FEATHER FROM THE late pleistocene DEPOSITS OF JEJU ISLAND, KOREA

A FOSSIL FEATHER FROM THE LATE PLEISTOCENE DEPOSITS OF JEJU ...

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第二届国际古生物学大会

作者： Jeong Yul KIM Kyung Soo KIM Sam Hyang KIM Sung Me KIM Dept.of Earth Sci.Edu. Korea National Univ.of Edu.Korea Chungbuk Science High School Korea

A fossil feather found from the late pleistocene sediments of Jeju Island, Korea is described. The sediments were deposited in a shoreline environment and have yielded numerous footprints of diverse birds and mammals including hominids. A fossil feather well preserved as a thin white film on the light gray mudstone is a part of a vaned flight feather. Although the specimen is small in size, 10.3 mm long and 9.0 nun wide,

关键词： fossil feather late pleistocene Jeju Island Korea

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Environmental evolution recorded by lipid biomarkers from the Tawan loess-paleosol sequences on the west Chinese Loess Plateau during the late pleistocene

Environmental evolution recorded by lipid biomarkers from th...

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Fangming Zeng·Shuyuan Xiang·Kexin Zhang·Yulin Lu Institute of Geology and Geophysics,Graduate University, Chinese Academy of Sciences,Box 9825,Beijing 100029,China Faculty of Earth Sciences,State Key Lab of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China Development and Research Center,China Geological Survey, Beijing 100037,China

This study provides a reconstruction of the environmental evolution since 128 ka recorded by the lipid biomarkers of the C-C n-alkanes,the C-C n-alkan- 2-ones and the C-C n-alkanols isolated from the Tawan loess section,Northwest *** in paleoenvironment are reconstmcted from the values of the carbon preference index(CPI),the average chain length(ACL), the L/H(ratio of lower-molecular-weight to higher-molecular -weight homologues),the n-alkane C/C ratios,and the n-alkan-2-one C/C *** parameters indicate the dominance of grasses over the west Chinese Loess Plateau(CLP) during the late pleistocene. Lower values of the CPI and the ACL values,respectively, indicate stronger microbial reworking of organic matter and changes in plant species,which are both indicative of a warmer-wetter ***,the fluctuations of environment recorded in the Tawan section exhibit ten phases that show obvious cycles between warm periods and cold *** study reveals that changes in the biomarker proxies agree well with changes in the magnetic susceptibility and grain size,and it indicates a huge potential for paleoenvironmental reconstructions by using the n-alkan-2-one and n-alkanol proxies.

关键词： Loess Lipid biomarker Linxia late pleistocene Earth environment

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Paleoenvironmental changes in southern Siberia during the late pleistocene and Holocene-evidence from multiproxy records of the Lake Baikal Region

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地球环境学报 2011年第1期 309-309页

作者： Bezrukova E Tarasov PA Riedel F Kuzmin M I A.P.Vinogradov Institute of GeochemistrySO RASIrkutsk 664033Russia Institute of Geological Sciences Free University Berlin

Worldwide terrestrial and marine sedimentary archives demonstrate that the last 50 ka interval in the Earth’s history experienced a number of long- and short-term climatic ***-resolution and accurately dated pollen and sedimentary records of the late-glacial/early Holocene interval exist for several regions of Europe and East Asia,providing important insight into the environmental dynamics in the North Pacific and North Atlantic ***,a recent global-scale synthesis of the Holocene climatic data demonstrates a lack of palaeorecords of comparable dating quality and resolution from the vast areas of Eurasia,including *** dating problem becomes even more obvious,when the pre-Holocene interval of the late Quaternary is *** Siberia— the region of Russia between;0—120°E and;0—60°N— consists of numerous sublatitudinal mountain ranges and lakes,including Lake Baikal in the *** lake sediments are one of the most promising sources of detailed palaeoenvironmental information,which provide an opportunity for bridging the European and Asian palaeoclimate archives and addressing critical questions concerning Quaternary climatology and *** publications on the Lake Baikal region presented coarse-resolution（millennial- or multicentury-scale） qualitative reconstructions of the Quaternary *** the long cores from Lake Baikal span millions of years research was mainly focused on the Holocene and earlier ***,little is known about glacial intervals due to the problems associated with very low pollen concentrations,poor organic content,low sedimentation rates and poor *** recently,even the YD cooling was not unequivocally identified and dated in the Baikal *** study presents new pollen and diatom records from Lake Kotokel and several regional peadands,and aims to reconstruct regional vegetation and environmental history since;7 ka BP（1 ka=1000 cal a）;to compare it w

关键词： late pleistocene MIS 3-1 changes in vegetation cover and climate southern Siberia chronology forcing feedback

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New occurrences of Altingiaceae fossil woods from the Miocene and upper pleistocene of South China with phytogeographic implications

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Journal of Palaeogeography 2021年第4期10卷 482-493页

作者： Lu-Liang Huang Jian-Hua Jin Cheng Quan Alexei A.Oskolski State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyCASNanjing 210008Jiangsu ProvinceChina School of Earth Science and Resources Chang'an UniversityXi'an 710054Shaanxi ProvinceChina Department of Botany and Plant Biotechnology University of JohannesburgAuckland Park 2006JohannesburgSouth Africa Komarov Botanical Institute of the Russian Academy of Sciences Prof.Popov Str.2St.Petersburg 197376Russia Ab

Mummified fossil woods of Liquidambar from the Miocene of the Guiping Basin of Guangxi and the upper pleistocene sediments of the Maoming Basin of Guangdong,South China are recognized as the new species Liquidambar guipingensis *** the extant species Liquidambar formosana Hance,*** fossil wood of *** shows the greatest structural affinity to the extant species Liquidambar excelsa(Noronha)Oken,which is widespread from SW China and NE India(Assam)through Myanmar and Malaysia to *** finding of *** may be considered as evidence for the early diversification of this lineage that occurred at least partly outside the modern range of this extant *** fossil wood of *** from the Maoming Basin represents the only pleistocene megafossil of Altingiaceae known to date,and provides confirmation for its presence in the interglacial vegetation of South China prior the Last Glacial Maximum.

关键词： Altingiaceae Fossil wood Miocene late pleistocene South China

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Phytolith evidence for human-plant subsistence in Yahuai Cave(Guangxi, South China) over the past 30000 years

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Science China Earth Sciences 2020年第11期63卷 1745-1757页

作者： Yan WU Guangmao XIE Limi MAO Zhijun ZHAO Miriam BELMAKER Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China College of History Culture and TourismGuangxi Normal UniversityGuilin 541001China Guangxi Institute of Cultural Relic Protection and Archaeology Nanning 530022China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Institute of Archaeology Chinese Academy of Social SciencesBeijing 100710China Department of Anthropology University of TulsaTulsaOklahoma 74104USA

South China preserves a rich archaeological record elucidating the evolution of early modern humans during the late ***,few studies on plant utilization were conducted in this *** used phytolith analysis from Yahuai Cave,Guangxi,to infer human use of plant resources over the past 30000 *** 14C dating was used to constrain the chronological *** indicate that several economically essential species were present throughout the sequence including Urticineae(*** sp.),which appears in the lower layers of the sequence(Marine Isotope Stage 3 through Heinrich 1);bamboo and palm which appear throughout the sequence,and wild rice which appears in a clear archaeological context dating to 16000 years *** is the earliest record of wild rice in South China and a prerequisite for rice *** unique stone tool assemblages,which resemble those in north China as opposed to South China,point to the possibility that humans,seeking refuge from the colder north,brought their tool kit with them and utilized familiar northern *** South China would have served as a refuge for human populations escaping the cold,harsh climate in the north with more ameliorate conditions in the south.

关键词： Phytolith Wild rice South China Bamboo late pleistocene

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Luminescence chronology and age model application for the upper part of the Chumbur-Kosa loess sequence in the Sea of Azov, Russia

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Journal of Mountain Science 2018年第3期15卷 504-518页

作者： CHEN Jie YANG Tai-bao G.G.MATISHOV A.A.VELICHKO ZENG Biao HE Yi SHI Pei-hong Institute of Glaciology and Ecogeography College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China Southern Scientific Center Russian Academy of Sciences Chekhov Av. 41 344006 Rostov-on-Don Russia Institute of C-eography Russian Academy of Sciences Staromonetny 29 Moscow 109027 Russia Faculty of Geomatics Lanzhou Jiaotong University Lanzhou 730000 China College of Tourism and Environment Shananxi Normal University Xi'an 710119 China

A reliable chronology is essentially critical for correlating loess records with other paleoenvironmental time series, as well as for continuing improvements in the reconstruction of paleoenvironment and paleoclimate changes. It is exactly that the scarcity of chronologies across the Sea of Azov has limited the interpretation of climatic and environmental information in the East European Plain. In view of this, this paper conducted an exploratory study to investigate whether the optically stimulated luminescence(OSL) dating of medium-grained quartz could be used to obtain a set of chronologies and the age models could be used to establish an independent time scale since the late pleistocene for the Sea of Azov loess. The results showed that an internally consistent set of optical ages for the Azov loess deposited up to ~76 ka. In addition, the ages developed based on magnetic susceptibility and grain size ages models showed good comparability with independent OSL ages at an acceptable range, suggesting that it might be practicable to establish an independent time scale using age models at the Sea of Azov loess, at least for the uppermost part of the Chumbur-Kosa section. Comparison with the ages based on two age models,the grain size ages using fine-grain fractions may provide a more reliable chronological sequence at the Azov loess since the late pleistocene. With the help of absolute ages and climate proxies(magnetic susceptibility and grain size), paleoclimatic change in the Sea of Azov have been traced for the late pleistocene.

关键词： Optical dating Age models Loess late pleistocene Sea of Azov

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Sea-level changes controlled detrital sediment inputs to the Bicol Shelf in the western Philippine Sea since 150 ka

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Journal of Oceanology and Limnology 2020年第4期38卷 1153-1168页

作者： ZHANG Zhishun JIANG Fuqing LI Tiegang YANG Dezhou ZHOU Xiaojing XIONG Zhifang QIU Xiaohua JIA Qi YAN Yu FENG Xuguang Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of ScienceQingdao 266071China School of Marine Science and Environment Dalian Ocean UniversityDalian 116023China No.1 Institute of Geology and Mineral Resources of Shandong Province Jinan 250014China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China

Detrital sediments derived from the Philippine Islands are one of the main sources of deep-sea sediments in the western Philippine ***,systematic research on their characteristics and transport mechanisms are *** used parametric end-member analysis to quantitatively partition the grain size of detrital sediments in core MD06-3052 from the Bicol Shelf in the western Philippine Sea;three endmembers EMI,EM2,and EM3,whose respective modes were at 2,10,and 45 μm,were *** also measured the Sr and Nd isotopic compositions of different size fractions(20 μm) of the detrital sediments and the results showed that the detrital sediments mainly originate from the Philippine *** EMI and EM2 are transported to the Bicol Shelf mainly by surface and bottom currents from the islands,and component EM3 is delivered by gravity flow from the exposed shelf during low sea-level *** content of the total detrital fraction and the three end-members,as well as the mass accumulation rates(MARs) of the coarse detritus(EM2 and EM3),were considerably higher during glacial periods(40-14 ka and 150-130 ka) than during other intervals;the glacials corresponded to a low sea level,while the MAR of the fine detritus(EMI) did not increase remarkably during 40-14 *** therefore concluded that the input of coarse detritus to the Bicol Shelf from the islands was mainly controlled by sea-level *** of the input of fine-grained detritus(EM1) was influenced not only by sea level but also by ocean currents and regional ***,our results help understand "source-to-sink" processes in the western Pacific marginal seas and their response to global change.

关键词： Bicol Shelf late pleistocene grain size sea level change

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Metapodials of ancient bison(Bison priscus)of northeast Russia:“stress markers,”sex and withers height

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Integrative Zoology 2019年第3期14卷 270-279页

作者： Irina Vladimirovna KIRILLOVA Fedor Kasperovich SHIDLOVSKIY Andrei Valerievich ZINOVIEV National Alliance of Shidlovskiy“Ice Age Museum ”MoscowRussia Tver State University TverRussia

A total of 175 metapodials(MP)of pleistocene and early Holocene bison(Bison priscus Boj.)from the vast area of northeast Russia were *** were attributed to males and females both visually and *** on the withers height of bison from northeast Russia are *** markers were recorded,including so-called“buttresses.”With rare exceptions,stress markers were not of a pathological *** origin and development of the buttresses are age-related;their prevalence in bison females can be considered as the response to an increased load during *** in the periosteum,found in males,are related to their greater *** are also well developed on metatarsals of the red deer and the elk;they are less developed in reindeer and not found in giant deer.A relationship among stress markers,locomotion and the environment is *** peculiarities of the Rauchua River bison locomotion are discussed.

关键词： bison buttressing late pleistocene locomotion metapodia northeast Russia

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Climate Reconstruction based on Pollen Analysis in Inner Mongolia, North China from 51.9 to 30.6 kaBP

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Acta Geologica Sinica(English Edition) 2013年第5期87卷 1444-1459页

作者： LI Suping David K.FERGUSON WANG Yong LI Jinfeng YAO Jianxin Key Laboratory of Stratigraphy and Palaeontology Institute of Geology Chinese Academy of Geological Sciences Institute of Palaeontology University of Vienna State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences

The palynomorph assemblage of lake sediments younger than 51.9 kaBP from Wulagai Gobi in Inner Mongolia was analyzed to reconstruct the vegetation and climate. From 51.9 to 30.6 kaBP, the vegetation was arid to semi-arid grassland with only slight changes. According to the palynomorphs, trees and shrubs were very rare. The large number and diversity of algae indicate the presence of a lake. Quantitative climatic conditions were reconstructed using the Best Analogues Method. The results indicate that the annual mean temperature was higher than that at present. The combination of temperature and annual precipitation suggests a change in the climate from cool dry to warm dry and then cool humid. Our results show that the annual precipitation values were mostly higher than that at present but were lower than 400 mm. It infers that the study area was already within the arid to semi-arid regions but with a stronger influence of the summer monsoon during 51.9 to 30.6 kaBP than at present. With slight differences mainly in time scale, the changing trend of the annual temperature curve is consistent with the other climatic records from Antarctica, Greenland, Hulu Cave （East China）, and the Tibetan Plateau during the last glacial period. From 30.6 kaBP to present, very few palynomorphs were detected in the samples. Hence, no information about the vegetation and climate could be extracted. Combined with other studies during late pleistocene, we presume that the reason for the lack of pollen during this period was caused by an abrupt temperature fall after 30.6 kaBP or that the lacustrine conditions were unsuitable for pollen deposition. It was probably incurred by the oxidation on land prior to deposition. But for those samples only with algae, it might be caused by the fact that algae could finish their life history in a very short time in a seasonal lake.

关键词： paleoclimate paleovegetation pollen analysis late pleistocene Inner Mongolia

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