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Environmental change since mid-pleistocene recorded in Shangshan achaeological site of Zhejiang

Journal of Geographical Sciences 2008年第2期18卷 247-256页

作者： MAO Longjiang MO Duowen JIANG Leping JIA Yaofeng LIU Xiaoyan LI Minglin ZHOU Kunshu SHI Chenxi College of Urban and Environmental Sciences Peking University Beijing 100871 China Zhejiang Provincial institute of Cultural Relics and Archaeology Hangzhou 310014 China Department of Tourism and Environment Shaanxi Normal University Xi＇an 710062 China Department of Resources Environment and Tourism Hengyang Normal University Hengyang 421008 China Institute of Geology and Geophysics CAS Beijing 100029 China

At about 173 ka BP of the late period of mid-pleistocene, the second terrace of the river had been formed as a result of uplift happening in Shangshan area because of the climate, sea level change and tectonic action. Between 173-75 ka BP, aeolian deposited on the terrace, a layer of reticulate red clayey soil about 80-100 cm thick deposited and developed under the warmer and higher temperature. In the last glacial period, the drop of the temperature and the decrease of the precipitation induced the dust-storms increased, A layer of Xiashu loess about 1.0-1.5 m thick accumulated on Shangshan terrace in the last glacial, which has the reticulate red clayey soil buried. At the beginning of the Holocene （11500 a BP-）, temperature went higher gradually and precipitation got more, the pre-persons moved on the Shangshan terrace （11,400-8600 a BP）, which is one of the most important archaeological sites, and can connect the paleolithic culture with Neolithic culture. It could be assumed from the results that the lower reaches of the Yangtze River are the home of rice cultivation, too. The lower place to the west of the Shangshan site experienced the two cycles process of the fluvial facies and the lacustrine facies, indicating that the water source of the pre-historical Shangshan is the river water or lake water. Two AMS 14C age proved the water source disappeared more than 1000 years ago.

关键词： environmental change reticulate red clay TL/OSL dating mid-pleistocene Shangshan culture Zhejiang

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Regional Environmental Differentiation in China Sincethe mid-pleistocene Inferred from Lake Recordsand Its Relation with East Asian Monsoons

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Acta Geologica Sinica(English Edition) 1998年第3期72卷 314-320页

作者： Wang Sumin Xue Bin Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing Jiangsu 210008

Abstract: Comparative study of long lake records in different regions in China can provide some significant information about the regional differentiation of the environment and Asian monsoon activities. However, intensively studied lacustrine cores with a span of a few hundred thousand years are very rare in China. The available examples are only three long cores from the Zoigê basin in the eastern Qinghai-Tibet plateau, the Qaidam basin in the northern Qinghai-Tibet plateau and the Dianchi basin in the Yunnan plateau respectively. The results show that the regional environmental differentiation since the mid-pleistocene involved three stages, i.e. 780–480, 480–160, 160–0 ka B.P. In each of the three stages different regions of China had their own distinctive environmental characteristics, indicating that the uplift of the Qinghai-Tibet plateau played a major role in the environmental differentiation process.

关键词： mid-pleistocene regional differentiation Asian monsoon lacustrine deposits

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Age estimation of the mid-pleistocene microtektite event in the South China Sea: A case showing the complexity of the sea-land correlation

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Chinese Science Bulletin 2000年第24期45卷 2277-2280页

作者： Jiliang Wang Quanhong Zhao Xinrong Cheng Rujian Wang Pinxian Wang Tongji Univ MOE Lab Marine Geol Shanghai 200092 Peoples R China

The present study confirms the stratigraphical position of microtektite layer being clearly located below the Brunhes/Matuyama (B/M) boundary. Based on the sedimentation rate derived from the stable isotopic and magnetic data of ODP Site 772A, cores 17957 and 17959 in the South China Sea, the age of the mid-pleistocene impact event was estimated at 10-12 ka earlier than the Brunhes-Matuyama polarity reversal. However, the microtektites were found above the measured B/M boundary in the loess profile due to the downward deviation of the measured B/M boundary from its true position. This demonstrates the complexity of paleo-magnetic records in the loess profiles which, in turn, causes the confusion in the sea-land stratigraphic correlation.

关键词： microtektites Brunhes/Matuyama (B/M) boundary mid-pleistocene sea-land correlation.

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Abrupt variations of the radiolarian fauna at mid-pleistocene climate transition in the South China Sea

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Chinese Science Bulletin 2000年第10期45卷 952-955页

作者： Andrea Abelmann Alfred Wegener Institute for Polar and Marine Research 27515 BremerhavenGermany

Based on a detailed study of the radiolarian fauna, the abundance pattern of planktic foraminifera as well as on isotope and sedimentological records, the mid-pleistocene climate transition as a multiple transition phenomenon could be recognized at Core 17957-2 from the South China Sea. Distinct changes in the radiolarian/foraminfera ratio, the coarse fraction and the radiolarian assemblages can be related to the global climate cooling observed at the mid-pleistocene revolution (MPR) around 900 ka. A pronounced southward shift of the North Equatorial Current that leads to lower sea-surface temperatures in the South China Sea is documented by the shift of tropical to subtropical radiolarian assemblages at 900 ka. Increasing radiolarian abundance after the MPR can be interpreted as a result of stronger upwelling and nutrient supply. These abrupt variations could result from the northern trade wind system and East Asian monsoon circulation.

关键词： radiolarian fauna abrupt variations 900 ka mid-pleistocene climate transition South China Sea.

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Spratlies Archipelago as the Australasian Tektite Impact Crater, Details of Formation &Richard Muller’s Dust Cloud Explanation for the mid-pleistocene Ice Age Cycle Transition

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Open Journal of Geology 2018年第1期8卷 1-8页

作者： Hermann G. W. Burchard Department of Mathematics Oklahoma State University Stillwater USA

Several significant events of a geological nature occurred approximately 800 ka before the present: (1) Australasian tektite fall (AA), (2) Brunhes-Matuyama geomagnetic reversal (BMR), (3) mid-pleistocene changes in ice age cycles. Add to these the undated fault system (4) in the South-West (SW) of the South China Sea (SCS). Here we offer a unified cause for all four of these in (5), an impact in the SCS of a large, massive cosmic object, likely a comet, obliquely coming from the SW at an extremely shallow angle, striking the Sunda shelf yet unexploded with the shock of its compressed air bow wave, and causing the continual shelf and slope to collapse, resulting in the fault system (4), then traveling almost tangentially to the surface, exploding at impact with the sea surface, ejecting the tektites (1), creating the formation underlying the later atolls of Spratlies Archipelago (6), Nansha Islands in Chinese, & causing the BMR (2). An explanation of event (3) was Richard Muller’s hypothesis of planet Earth passing through an interplanetary dust cloud periodically due to ecliptic precession. Here we hypothesize this cloud actually is a belt of Australasian tektites ejected into space at super-orbital velocities that Earth encounters about every 100 ka.

关键词： Spratlies Archipelago Cosmic Object Impact Crater Australasian Tektites Brunhes-Matuyama Geomagnetic Reversal Richard Muller Dust Cloud Hypothesis mid-pleistocene Ice Age Cycle Transition Google Earth High Resolution Update

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Discovery and Analysis of the Fossilised Yuling-Man Skull

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地域研究与开发 1993年第S1期12卷 8-18页

作者： Feng Xingxiang Zhou Huashan Ba Zhigang Zhang Guangye Wang Panji Zhang Zhenyu(Department of Geography, Henan University Kaifeng, Henan 475001, China)

A fossilised paleoanthropological skull was discovered in November 1987, in the guily-head cliff on the east bank of Wenyu River near Xinza village, Yuling - town (hence the name Yuling-Man), Lingbao country, Henan Province, China. The skull, dated to an absolute U-isotope (U234 to U238 ) age of B. P. 156000 ± 13000 years, was found in the upper portion of the alluvial statum of the mid-Pleistocens Series, together with pateoliths of the Kehe Cutture System in the mid-late Paleolithic Periods. Although much research has been nomied out in this area, this is the first fossilised paleoanthropological skull in have been found. Therefore, this project, funded by the Natural Science Foundation/Henan Scientific Committee, is making new contributions to paleoanthropological research in China.

关键词： Yuling-Man late mid-pleistocene Paleolithic Period.

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middle-Late pleistocene Paleo-Climate and Paleo-Altimetry of the Centre of Tibetan Plateau Indicated by the Sporopollen Record of Well QZ-4

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Journal of Geoscience and Environment Protection 2017年第8期5卷 148-165页

作者： Jianglin He Jian Wang Weipeng Li Wei Sun Chengdu Institute of Geology and Mineral Resources Ministry of Land and Resources Chengdu China Key Laboratory for Sedimentary Basin and Oil and Gas Resources Ministry of Land Resources Chengdu China Land and Resources College China West Normal University Nanchong China Key Laboratory of Mountain Environment Evolution and regulation Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu China

The core sample from well QZ-4 is an important climate archive for the central Tibetan Plateau in the middle-late pleistocene. In this work, a detailed pollen analysis of it is carried out to provide a preliminary insight into the paleo-climate and paleo-altimetry change in the central Tibetan Plateau. It can be concluded that the pollen assemblage can be obviously divided into two pollen zones, Pollen zone I (251.1 - 314 m in depth, 120.0 - 345.8 ka BP.) and Pollen zone II (200 - 251.1 m in depth, 105.4 - 120 ka BP.). The paleo-climate during pollen zone I deposition period was comparatively colder and wetter than it during the pollen zone II deposition period. After Gonghe Movement, the center of Tibetan Plateau was uplifted about 300 m (from 3500 - 3700 m to 3800 - 4000 m in elevation). The wind was changed from horizontal or downward direction to upward direction, in the study area. In the central of Tibetan Plateau, the climate change seems to be mainly driven by global climate change, and that tectonic uplift may have been a subordinate influence at the middle-late pleistocene.

关键词： Tibet Plateau mid-pleistocene Palaeo-climate Paleo-Altimetry Gonghe Movement Well QZ-4

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黄土-红粘土记录的构造尺度气候变化

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第四纪研究 2007年第2期27卷 242-250页

作者：熊尚发中国科学院地质与地球物理研究所北京100029

晚新生代约5Ma以来，全球气候系统发生了一系列的重要转型，地球从单极（南极）常年有冰变为两极常年有冰，新生代从“温室”转为“冰室”的漫长历程至此完成。中国连续的黄土-红粘土沉积覆盖了约8—7Ma以来的时段，提供了完整的Pliocen... 详细信息

晚新生代约5Ma以来，全球气候系统发生了一系列的重要转型，地球从单极（南极）常年有冰变为两极常年有冰，新生代从“温室”转为“冰室”的漫长历程至此完成。中国连续的黄土-红粘土沉积覆盖了约8—7Ma以来的时段，提供了完整的Pliocene-pleistocene转型时期的陆相古气候记录，是研究晚新生代构造尺度气候变化和转型的重要记录。黄土-红粘土记录表明，其构造尺度变化既在相当程度上反映了晚中新世-上新世以来的全球变冷信号和Plio／pleistocene转折、***转折等重要构造事件，同时也对重要的区域构造和环境演化过程有显著的响应。今后需要通过对黄土-红粘土记录的研究，就上新世-更新世一系列的转型过程中重要气候系统成员的变化特征、高低纬气候系统相互作用特征以及转型机制等第四纪气候变化的根本问题作出有特色的回答。

关键词：黄土-红粘土构造尺度事件 Plio/pleistocene Transition mid-pleistocene Transition

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