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| 1 | Loess-soil sequences in southern Anhui Province: Magnetostratigraphy and paleoclimatic significance显示文摘Two parallel loess-soil sequences from Xuancheng and Fanchang in southern Anhui Province are dated using geomagnetic and luminescence methods. The Brunhes/Matuyama (B/M) reversal boundary is recognized within the lower part of the so-called Vermiculated Red Soil (VRS) in the Xuancheng section while the entire Fanchang sequence is of Brunhes age. This indicates that the most recent VRS in southern China, a stratigraphic marker and an indication of extremely warm-humid conditions, was formed during the middle Pleistocene, chronologically correlative with the S4 and S5 soil units in northern China. Microscopic and sedimentologic investigations reveal that eolian deposition started in this region at about 0.85 MaBP, roughly synchronous with the well-known Mid-Pleistocene climate change of global significance. The strengthening of both summer and winter monsoon circulations and the consequent river hydrological changes at that time would have provided favorable conditions for sustained eolian deposition in the middle-lower reaches of the Yangtze River since 0.85 MaBP. | QIAO Yansong GUO Zhengtang | 2003 | Chinese Science Bulletin2003，48，19： | 43 |
| 2 | Variations of geochemical compositions and the paleoclimatic significance of a loess-soil sequence from Garzê County of western Sichuan Province,China显示文摘The West Sichuan Plateau is located in the southeast margin of the Tibetan Plateau, where the climate is mainly influenced by the Indian southwest summer monsoon and the Tibetan Plateau monsoon. In this study, detailed geochemical analysis has been carried out on Ganzisi loess-paleosol sequence in Ganzê County of western Sichuan Province. The results indicate that Ganzê loess and paleosol have experienced the incipient stage of chemical weathering in dust source regions, characterized by the decomposition of plagioclase which caused the depletion of mobile elements Na and Ca. The post-depositional chemical weathering is characterized by carbonate dissolution and oxidation of Fe2+. The variations of some geochemical indexes (such as CIA values, Na/K and Fe2+/ Fe3+ ratios) in Ganzisi loess-paleosol sequence indicate a gradually decreased chemical weathering intensity in the dust source regions and deposition areas since 1.15 Ma BP consistent with the general increase of global ice volume, reflecting that the arid trend since 1.15 Ma BP in the southeast Tibetan Plateau is a regional response to the global climate change. The geochemical indexes in this section also reveal an obvious drying step occurred at about 250 ka BP in this region. We interpret this drying step as a result of decreased influence of the Indian southwest summer monsoon. This decrease in monsoon moisture is probably attributable to the uplift of the southeast margin of the Tibetan Plateau at about 250 ka BP. | QIAO YanSong ZHAO ZhiZhong WANG Yan FU JianLi WANG ShuBing JIANG FuChu | 2009 | Chinese Science Bulletin2009，54，24： | 13 |
| 3 | Eolian origin of the Miocene loess-soil sequence at Qin'an,China:Evidence of quartz morphology and quartz grain-size显示文摘 | LIU Jinfeng GUO Zhengtang QIAO Yansong HAO Qingzheng YUAN Baoyin | 2006 | Chinese Science Bulletin2006，51，1： | 12 |
| 4 | Magnetostratigraphic and paleoclimatic studies on the Red Earth Formation from the Chengdu Plain in Sichuan Province,China显示文摘Two red earth sections from the Chengdu Plain in Sichuan Province are dated using geomagnetic methods. The Brunhes/Matuyama (B/M) reversal boundary is recognized within the upper parts of the two sections,and the Jaramillo normal subzone occurs in the middle-lower parts of the vermiculated red soil (VRS),which indicate that the parent material for the VRS deposited in the middle Quaternary. Sedimentologic and geochemical studies suggest that the Chengdu Clay and part of the parent material for the VRS are of aeolian origin. Pollen analysis indicates that the Chengdu Plain was mainly covered by needle-leaved forest with a cool to cool temperate humid climate when the parent material for the VRS deposited. The relatively cool to cool temperate climatic condition in the Chengdu Plain in the middle Quaternary,which may be caused by the uplift of the Tibetan Plateau,was a response to the geo-environmental changes of global significance. | ZHAO ZhiZhong QIAO YanSong WANG Yan FU JianLi WANG ShuBing LI ChaoZhu YAO HaiTao JIANG FuChu | 2007 | Science China Earth Sciences2007，50，6： | 7 |
| 5 | Magnetostratigraphy of a Loess-Paleosol Sequence from Higher Terrace of the Daduhe River in the Eastern Margin of the Tibetan Plateau and Its Geological Significance显示文摘The eolian deposits distributed in the river valleys in the eastern margin of the Tibetan Plateau(TP)are very useful in neotectonic and paleoclimatic studies.Firstly,the climate in the eastern margin of the TP is mainly controlled by the Indian summer monsoon,and detailed studies on the loess-paleosol sequences in this region can provide valuable terrestrial evidence of past changes in the Indian summer monsoon.Secondly,the river terraces in the eastern margin of the TP are considered to be a sensitive recorder of neotectonism to reflect the timing and amplitude of the TP uplift.The formation ages of | QIAO Yansong WANG Yan YAO Haitao QI Lin HE Ze Xin CHENG Yu PENG Shasha GE Junyi | 2015 | Acta Geologica Sinica(English Edition)2015，89，1： | 5 |
| 6 | Formation of the Yalong Downstream Terraces in the SE Tibetan Plateau and Its Implication for the Uplift of the Plateau显示文摘The Yalong River is an important river that runs across the abruptly changing terrain of the SE Tibetan Plateau. The terraces and Quaternary sediments in its valleys preserve the information of tectonic uplift,climate changes,and landform evolution since the Middle Pleistocene. Based on geomorphological,sedimentological,and chronological investigations,6–8 terraces are identified in the lower reaches of Yalong catchment and its tributary—the Anning River. The electron spin resonance(ESR) or optically stimulated luminescence(OSL) data on the alluvial sediments in the upper portion of terraces indicate that they formed in 1.10,0.90,0.72,0.06–0.04,0.03–0.02,and 0.01 Ma. Tectonic uplift and the climatic cycle controlled the formation of the Yalong River terraces. The former dominated the dissection depths and incision rates,whereas the latter controlled the transformation between accumulation,which developed during the glacial period,and incision,which developed during the glacial-interglacial transition. The Yalong downstream incised rapidly from 1.10 to 0.72 Ma and rapidly from 0.06 Ma until the present; the terraces developed during these two periods. The incision rates in space during the two periods indicate the uplifting extent of the Jinpingshan area,which decreases toward the east and the south. The results reveal two rapidly uplifting stages in the SE Tibetan Plateau,including an accelerated uplifting since 0.06 Ma. Since the Middle Pleistocene,the tectonic uplift of the SE and NE parts of the Tibetan Plateau is synchronous,according to the same development stages of the river terraces of the Yalong downstream and the Yellow River in the Lanzhou area of the NE Tibetan Plateau. The difference in the horizontal displacement between the Xianshuihe Fault and the Anninghe Fault bend resulted in the rapid uplift of the Jinpingshan area. The incision rate for the spatial distribution of the Yalong downstream is the geomorphological response of crustal shortening and uplift differences in the SE margin block of the Tibetan Plateau. The southeastward diffusion process of the Tibetan Plateau was recorded. | HE Zexin ZHANG Xujiao QIAO Yansong BAO Shuyan LU Chunyu HE Xiangli | 2015 | Acta Geologica Sinica(English Edition)2015，89，2： | 4 |
| 7 | Chronological Link Between the Abrupt Change of the Loess Grain Size Sequence and the Formation of River Terraces on the Eastern Margin of the Qinghai-Tibetan Plateau Since the Late Early-Pleistocene显示文摘基于 magnetostratigraphy,磁性的危险性和 Garz | LIU Dongyan QIAO Yansong LI Weiran XIE Ruihuang PENG Shasha | 2011 | Acta Geologica Sinica(English Edition)2011，85，3： | 4 |
| 8 | Geochemical Characteristics of Eolian Deposits in the Chengdu Plain of Sichuan Province and the Implications for Provenance显示文摘In this study Chengdu Red Earth(CRE)from the Chengdu Plain(CP),Sichuan province,was analyzed for its elemental(major and trace elements)and isotopic(Sm-Nd)geochemistry and compared with Pleistocene loess and paleosol samples from the Chinese Loess Plateau(CLP)in Northern China.The geochemical composition of CRE is similar to north China loess,and also resembles the average UCC.This indicates that CRE,as loess deposits in Northern China,was derived from well-mixed sedimentary protoliths that have undergone numerous upper crustal recycling processes.However,obvious differences in the geochemical characteristics of CRE and the north China loess are also revealed in our results.For chemically stable elements,CRE has higher Ti,Zr,Hf and lowerΣREE,Ba contents in comparison with loess samples from the CLP.Further analysis shows that CRE has higher TiO2/Al2O3,SiO2/Al2O3,Ba/Rb and lower Ce/Yb,Eu/Yb,LaN/YbN andΣLREE/ΣHREE ratios.In Sm-Nd isotopic geochemistry,Sm and Nd content and theεNd(0)value in CRE are significantly higher than those in north China loess.The higher TiO2content in CRE coincided with a high background concentration of Ti in the Sichuan Basin and the surrounding regions.The lowerΣREE and higher Sm,Nd,εNd(0)values are related to the wide distribution of basalt in the southwest Sichuan Basin.The elemental and isotopic geochemistry of CRE indicates that eolian materials in the CP predominantly come from the Sichuan Basin and the surrounding regions,which differs from loess deposits in the CLP. | TAN Yuanlong QIAO Yansong ZHAO Zhizhong WANG Yan QI Lin FU Jianli LIU Zongxiu YAO Haitao WANG Shubing JIANG Fuchu | 2013 | Acta Geologica Sinica(English Edition)2013，87，6： | 3 |
| 9 | Intensification of the East Asian Monsoon in Southern China at about300-400 kaBP Inferred from Eolian Deposits in the Middle-lower Reaches of the Yangtze River显示文摘In the East Asian monsoon region,eolian deposits widely distributed in the middle-lower reaches of the Yantgze River are among the best materials available for studies on Quaternary climate change in the subtropical zone of Southern China.Typical eolian deposits in this region include upper Xiashu Loess(XL) and underlying Vermiculated Red Soil(VRS) layers.In this paper,chronological and paleoclimatic studies are conducted on an eolian deposit sequence near Jiujiang(JJ) city in northern Jiangxi province.A magnetostratigraphic study,combined with optically stimulated luminescence(OSL) dating,is conducted on the JJ section and provides further evidence that eolian deposits in the middle-lower reaches of the Yangtze River have been formed since the late Early Pleistocene,and that the boundary age between the XL and VRS layers is about 300-400 kaBP.In grain-size records of the JJ section,the median grain-size and content of the >30 μm size fraction increase sharply after 300-400 kaBP,representing an East Asian winter monsoon intensification event.Further pollen analysis reveals differing pollen assemblages before and after 300-400 kaBP:there is an evident increase in plants adapted to grow in a warm humid environment after 300-400 kaBP,implying an increase in precipitation caused by intensification of the East Asian summer monsoon.Global ice volume and uplift of the Tibet Plateau(TP) are regarded as crucial factors influencing variations of the East Asian monsoon on a long-term scale.The deep-sea δ^(18)O record,which reflects variations in global ice volume,shows no obvious change after 300-400 kaBP.Moreover,the influence of global ice volume changes on the East Asian summer and winter monsoons is inverse;the global ice volume increase(decrease) implies a strengthened(weakened) winter monsoon and weakened(strengthened) summer monsoon.We therefore interpret the coupled intensifications of the East Asian summer and winter monsoons at about 300-400 kaBP to the uplift of the TP in the Middle Pleistocene.This climate event is also documented in eolian deposits from the southern margin of the Chinese Loess Plateau(CLP) and from the desert-loess transitional belt.However,it is not recorded in the loess-paleosol sequences from the central part of the CLP,thereby indicating differing climate responses to TP uplift in different regions,which requires further study. | QI Lin QIAO Yansong LI Yuehui WANG Yan PENG Shasha HE Zexin YANG Shuaibin HAN Chao ZHANG Xujiao | 2017 | Acta Geologica Sinica(English Edition)2017，91，3： | 3 |
| 10 | Magnetostratigraphy and provenance of the Qingzhou loess in Shandong province显示文摘Loess deposits with varying thickness are widely distributed on the intermontane valleys and piedmont zones on the northern side of the central Shandong mountainous regions. However, the basal ages and material resources of the loess deposits are not clear. The paper studied the Qingzhou loess profile in Shandong with magnetostratigraphic and optical stimulated luminescence (OSL) methods and further investigated its main provenances with the mineralogical methods. The magnetostratigraphic results showed that the Brunhes/Matuyama (B/M) reversal boundary was not recognized, suggesting a basal age younger than 0.78 Ma. Extrapolations by sedimentation rates, based on the upper part depositional rate from the OSL age, the basal age of the Qingzhou loess is about 0.5 Ma. Until now, older loess deposits have not been reported on the northern side of the central Shandong mountainous regions. The results of the paper indicate that the loess deposits in this area might have strated from the Middle Pleistocene. The basal age of Qingzhou loess is approximately synchronous with the Xiashu loess in the middle-lower reaches of Yangtze River. Major components of clay minerals in the Qingzhou profile are dominated by illite. Other clay mineral compositions are mainly smectite, chlorite and kaolinite, which are similar with the Xifeng loess in the Loess Plateau. However, the contents of smectite and the ratios of illite and kaolinte in the Qingzhou loess samples are higher than those in the Xifeng loess samples of the Loess Plateau, indicating that the loess in the northern side of the central Shandong mountainous regions has different sources from that of the loess deposits in the Loess Plateau. The clay mineral analysis further reinforces the earlier conclu- sion that the marine strata exposed in the Laizhou Bay and the fluvial plain of the lower reaches of Yellow River during the glacier periods are the main material sources for the Qingzhou loess deposits, which is an indicator to the local aridification of the lower reaches of the Yellow River. Loess deposition in the central Shandong mountainous regions started at around 0.5 Ma. The age of Qingzhou loess is approximately synchronous with the ongoing high-latitude cold since the Middle Pleistocene, which indicates that strengthened East Asian winter monsoon was sufficiently energetic to bring substantial quantities of material from the marine strata exposed in the Laizhou Bay and the fluvial plain of the lower reaches of the Yellow River to the central Shandong mountainous regions. The results therefore suggest that both regional geological process and global changes were responsible for the formation of Qingzhou loess since Middle Pleistocene. | ShuZhen PENG LiJun ZHU GuoQiao XIAO YanSong QIAO ZhiDong GAO DongDong CHEN | 2011 | Journal of Arid Land2011，3，3： | 3 |
| 11 | Geochemical evidence for the provenance of middle Pleistocene loess deposits in southern China显示文摘 | Hao Qingzhen Guo Zhengtang Qiao Yansong | 2010 | Quaternary Science Review2010，29，2324： | 1 |
| 12 | A New Method to Identify Quaternary Moraine:Acoustic Emission Stress Measurement显示文摘How to effectively identify glacial sediments,especially Quaternary moraine,has been in dispute for decades.The traditional methods,e.g.,sedimentary and geomorphologic ones,are facing challenge in eastern China where controversial moraine deposits are dominatingly distributed.Here,for the first time,we introduce the acoustic emission(AE)stress measurement,a kind of historical stress measurement,to identify Quaternary moraine.The results demonstrate that it can be employed to reconstruct stress information of glaciation remaining in gravels,and may shed light on the identification of Quaternary moraine in eastern China.First,we measured the AE stress of gravels of glacial origin that are underlying the Xidatan Glacier,eastern Kunlun Mountains in western China.Second,we calculated the stress according to the actual thickness of the glacier.The almost identical stress values suggest that the glacial gravels can memorize and preserve the overlying glacier-derived aplomb stress.And then we introduce this new approach to the controversial moraine in Mount Lushan,eastern China.The results indicate that the stress is attributed to the Quaternary glacier,and the muddy gravels in the controversial moraine in Mount Lushan are moraine deposits but not others. | ZHAO Zhizhong QIAO Yansong TIAN Jiaorong WANG Min LI Mingze HE Peiyuan QIAN Fang | 2006 | Acta Geologica Sinica(English Edition)2006，80，5： | 1 |
| 13 | Geochemical evidence for the provenance of middle Pleistocene loess deposits in southern China显示文摘 | Qingzhen Hao Zhengtang Guo Yansong Qiao Bing Xu Frank Oldfield | 2010 | Quaternary Science Reviews2010，，23： | 1 |
| 14 | Paleoearthquake Investigation along the Chenghai Fault Zone since~500 ka,Southeast Margin of the Tibetan Plateau显示文摘The Chenghai fault zone is located in the Sichuan–Yunnan rhombus block,which is surrounded by the Honghe River,Xianshuihe–Xiaojiang,and Jinsha River fault zones.As a mid-continental active fault,it is one of the most important seismogenic fractures in the southeast margin of the Tibetan Plateau.Geological seismic study is an important supplement to the historical seismic record;therefore,identification of paleoearthquake events in this region is of great significance to reveal the pattern and mechanism of earthquake development.In this study,detailed investigation has been carried out on the earthquake traces that formed in the Quaternary sediments in the Jinsha River section of the Chenghai fault zone,and samples for dating chronology testing were also collected.Many paleoearthquake traces were discovered in the field,including earthquake fissions,dammed lake sediments and landslides,earthquake-generated rock falls,seismic faults,and sand liquefaction veins.The collected samples were tested using optically stimulated luminescence,electron-spin resonance,and U-series methods.A total of 68 chronological samples were dated,combined with the results of field investigations,and 10 large paleoearthquake events were discovered in this region since 500 ka,which are at approximately 450,400,345,300,250,190,155,105,75,and 25 ka.Ten tectonic activity periods that produced multiple paleoearthquake events were identified since 500 ka.This study identifies paleoearthquake events in longer scales,larger spaces,and more extensive sediments,which provides new perspectives and new ideas for paleoearthquake research. | YANG Shuaibin QIAO Yansong WU Zhonghai ZHANG Xujiao QI Lin HE Zexin LIANG Ying | 2021 | Acta Geologica Sinica(English Edition)2021，95，4： | 0 |
| 15 | Late Cenozoic Geology and Paleo-environment Change in the Eastern Edge of Qinghai-Xizang Plateau显示文摘在 Qinghai-Xizang 高原的东方边有迟了的新生代湖的存款和黄土和红泥土和冰碛。各种各样的基因沉积在迟了的新生代 paleo 环境变化上记录了富有的信息。Xigeda 湖在在那里的 4.2 妈 B.P.-2.6 妈 B.P 期间形成了是 9 周期的温暖寒冷的引申。在西方的四川的 Eolian 免职在黄土土壤序列连续地记录了的 1.15 妈 B.P 开始了 14 个 paleo 季风气候周期。自从在那里的 1.13 妈 B.P 是在东方 Qinghai-Xizang 高原的 4.3 妈 B.P 的一个旧冰川的时期,在 Chengdu 平原的红土记录了 paleoclimatic 阶段的 5 个阶段。在期间第四级,有与 5 冻结成冰相应的 5 个极端 paleoclimatic 事件。 | ZHAO Zhizhong QIAO Yansong WANG Shubing YAO Haitao WANG Yan LI Chaozhu FU Jianli LIU Zongxiu LI Mingze MIAO Qi JIANG Fuchu | 2008 | Acta Geologica Sinica(English Edition)2008，82，5： | 0 |
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