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| 1 | New SHRIMP U-Pb age from the Wuqiangxi Formation of Banxi Group:Implications for rifting and stratigraphic erosion associated with the early Cryogenian (Sturtian) glaciation in South China显示文摘In South China, the Wuqiangxi Formation of the Banxi Group and its equivalents underlie the early Cryogenian (Sturtian) glacial deposits but their thickness varies from <200 m to >2000 m. In the Guzhang section of western Hunan, the Wuqiangxi Formation is only 152 m thick, and an ash bed 58 m below the glacial diamictite yielded a SHRIMP U-Pb age of 809.3±8.4 Ma. In contrast, 90 km south of the Guzhang section towards the basin in Zhijiang area where the Wuqiangxi Formation is ~2200 m thick, an age of 725±10 Ma has been reported from the top of this unit, 300 m below the glacial diamictite. These ages provide new evidence for the regional stratigraphic correlation across the Nanhua basin, and suggest unusually large (>2 km) stratigraphic erosion potentially associated with the Sturtian glaciation in South China. The magnitude of erosion may imply significant uplifting and tectonotopography at the onset of the Sturtian glaciation. | ZHANG ShiHong JIANG GanQing DONG Jin HAN YiGui WU HuaiChun | 2008 | Science China Earth Sciences2008，51，11： | 33 |
| 2 | New paleomagnetic results from the Yangzhuang Formation of the Jixian System,North China,and tectonic implications显示文摘A paleomagnetic study was carried out on the Yangzhuang Formation (~1350 Ma) of the Jixian System in the North China Block (NCB). Detailed stepwise thermal demagnetization isolated two components. The soft compo- nent (component A) was interpreted as a remagnetization in the recent geomagnetic field. The hard component (compo- nent B) with higher unblocking-temperatures was carried by hematite. Its site-mean direction is D/I = 77.6°/-24.3° (κ = 5.4, α95 = 18.3°, N = 15 sites) before, and D/I = 72.2°/11.5° (κ = 24.6, α95 = 7.9°) after tilt correction. It passes a fold test (Mesozoic folding) at 99% confidence level and reversal test at 95% confidence level. The corresponding pole locates at 17.3°N, 214.5°E (dp = 4.1°, dm = 8.0°). A best fit of paleo- magnetic poles from the NCB, Baltica, Siberia and the ap- parent polar wander path for Laurentia suggests a long-lived connection between these paleo-continents between ~1800 and 1350 Ma. | WU Huaichun ZHANG Shihong LI Zheng-Xiang LI Haiyan DONG Jin | 2005 | Chinese Science Bulletin2005，50，14： | 16 |
| 3 | Recognition of Milankovitch Cycles in the Natural Gamma—Ray Logging of Upper Cretaceous Terrestrial Strata in the Songliao Basin显示文摘沉积 cyclicities 由 Milankovitch 气候频率控制了的七自然 gamma 光线记载近来,在 Songliao 盆的白垩纪年龄揭示的成员 1 Qingshankou 形成(K_2qn^1 ) Nenjiang 形成和成员 1 和 2 (K_2n^(1-2 )) 的光谱图分析。Milankovitch 周期的识别为 K_2n^(1-2 ) 节为 K_2qn^1 节,和~ 6 .69-10.16 cm/ka 允许~ 7 .55-8.62 cm/ka 的平均累积率的评价。二个海洋的违反事件发生在 K_2qn^1 和 K_2n~ 和他们的年龄(1-2 ) 的免职期间分别地在~ 0 .74-1.10 妈和~ 2 .38-4.84 妈。Milankovitch 的鉴定从在 Songliao 盆的沉积岩石可以提供的有细密纹理的深湖骑车为高分辨率的 stratigraphic 分和关联的大潜力。 | WU Huaichun ZHANG Shihong SUI Suwen HUANG Qinghua | 2007 | Acta Geologica Sinica(English Edition)2007，81，6： | 6 |
| 4 | High-precision geochronology of the Early Cretaceous Yingcheng Formation and its stratigraphic implications for Songliao Basin,China显示文摘The Songliao Basin in Northeast Asia is the largest and longest-lived rift basin and preserves a nearcontinuous continental succession of the most of the Cretaceous period,providing great material to investigate the adaption of the terrestrial systems to the Cretaceous greenhouse climate and tectonic events.However,the paucity of precise and accurate radioisotopic ages from the Early Cretaceous strata of the Songliao Basin has greatly held back the temporal and causal correlation of the continental records to the global Early Cretaceous records.Three tuff layers intercalated in the Yingcheng Formation have been intercepted by the SK-2 borehole,which offer excellent materials for radioisotopic dating and calibration of the chronostratigraphy of the Lower Cretaceous sequence of Songliao Basin.Moreover,the Yingcheng Formation recorded the largest and the last of the two major volcanic events in Songliao Basin,which also represents a turning point in the basin evolution history of Songliao from syn-rift stage to post-rift stage.Here we report high-precision U–Pb zircon geochronology by the CA-ID-TIMS technique on three tuff samples from the Yingcheng Formation of the SK-2 borehole in the Songliao Basin to construct a greatly improved,absolute age framework for the Yingcheng Formation and provide crucial age constraints for the Songliao Lower Cretaceous Strata.The new CA-ID-TIMS geochronology constrained the Yingcheng Formation at 102.571+0.320/-2.346 Ma to ca.113 Ma,correlating to the Albian Stage.Combined with the previous published Songliao geochronology,the Quantou Formation is constrained to between 96.442+0.475/-0.086 Ma and 91.923+0.475/-0.086 Ma;the Denglouku Formation is constrained to between 102.571+0.320/-2.346 Ma and 96.442+0.475/-0.086 Ma;the age of the Shahezi Formation is estimated at ca.113 Ma to ca.118 Ma,which could extend to ca.125 Ma in some locations in Songliao Basin.The major unconformity between the Yingcheng Formation and the Denglouku Formation,which represents the transition of the basin from syn-rift to post-rift is thus confined to between 102.571+0.320/-2.346 Ma and 96.442+0.475/-0.086 Ma.This is roughly contemporaneous with the change in the direction of the paleo-Pacific plate motion from west-southwest to north or northwest in mid-Cretaceous,suggesting their possible connections. | Tiantian Wang Chengshan Wang Jahandar Ramezani Xiaoqiao Wan Zhiqiang Yu Youfeng Gao Huaiyu He Huaichun Wu | 2022 | Geoscience Frontiers2022，13，4： | 5 |
| 5 | Reliability of Relative Paleointensity Recorded in Chinese Loess-Paleosol Sediments显示文摘A detailed paleomagnetic and rock-magnetic investigation spanning loess L7 to paleosol S8 has been carried out at the Baoji and Xifeng sections. Results of anisotropy of magnetic susceptibility confirm that the studied loess-paleosol sediments retain primary sedimentary fabrics. Stepwise thermal demagnetization shows that two well-defined magnetization components can be isolated from both loess and paleosol specimens. A low-temperature component, isolated between 100°C and 200°C, is consistent with the present geomagnetic field direction, and a high-temperature component, isolated between 200-300°C and 620-680°C, includes clearly normal and reversed polarities. Isothermal remanent magnetization and thermomagnetic analyses indicate that characteristic remanent magnetization is mainly carried by magnetite and hematite. The Day plot, together with the stratigraphic variations of rock-magnetic parameters, shows that the uniformity of magnetic mineralogy and grain size fulfills the criteria for relative paleointensity (RPI) studies. RPI records have been constructed using natural remanent magnetization (NRM) intensity after thermal demagnetization at 300°C normalized by low-frequency magnetic susceptibility (NRM 300 /χ). The results show that the RPI record from the Baoji section, where pedogenesis is quite weak, is compatible with the stacked PISO-1500 paleointensity record, suggesting that it might reflect the paleointensity variation of the geomagnetic field. The RPI record from the Xifeng section, where pedogenesis is rather strong, indicates a clear dissimilarity with the stacked PISO-1500 paleointensity record, implying that it does not reflect the paleointensity variation of the geomagnetic field. Our new results show that the NRM 300 /χ from the strongly pedogenetic paleosols does not completely eliminate the pedogenetic (climatic) influence, so it might be unsuitable for a reliable paleointensity study. | YANG Tianshui LI Haiyan WU Huaichun YANG Zhenyu ZHANG Shihong HYODO Masayuki | 2012 | Acta Geologica Sinica(English Edition)2012，86，5： | 2 |
| 6 | miR-34 is associated with poor prognosis of patients with gallbladder cancer through regulating telomere length in tumor stem cells显示文摘 | Ke Jin Yonghua Xiang Jing Tang Guangchun Wu Junwei Li Huaichun Xiao Chunwang Li Yuxiang Chen Jingfeng Zhao | 2014 | Tumor Biology2014，，2： | 1 |
| 7 | Time-cali- brated Milankovitch cycles for the late Permian显示文摘 | Wu Huaichun Zhang $hihong Hinnov L A | 2013 | Nature Communication2013，4，： | 1 |
| 8 | Evolvement of permeability of ore granular media duringheap leaching based on image analysis显示文摘 | Yang Baohua Wu Aixiang Jiang Huaichun | 2008 | Transaction of Nonferrous Metals Society of China2008，18，2： | 1 |
| 9 | Pre-Rodinia supercontinent Nuna shaping up: A global synthesis with new paleomagnetic results from North China显示文摘 | Shihong Zhang Zheng-Xiang Li David A.D. Evans Huaichun Wu Haiyan Li Jin Dong | 2012 | Earth and Planetary Science Letters2012，，： | 1 |
| 10 | A comprehensive construction of the domain ontology for stratigraphy显示文摘Stratigraphic knowledge,the cornerstone of geoscience,needs to be represented by the Knowledge Graph based upon ontology,in order to apply the state-of-the-art big-data techniques.This study aims to comprehensively construct the ontologies for the stratigraphic domain.This has been achieved by a federated,crowd intelligence-based collaboration among domain experts of major stratigraphic subdisciplines.The initial step is to enumerate key terms from authoritative references and incorporate them into the Geoscience Professional Knowledge Graphs(GPKGs)of Deep-time Digital Earth Project.During this process,semantic heterogeneities were meticulously addressed by professional judgement aided by an automatic detection of Homonyms at the GPKGs platform.Afterwards,these terms were further differentiated as either classes or properties and arranged in a hierarchical framework in a top-down process.Consequently,seven ontologies are constructed for major stratigraphic branches,i.e.,Lithostratigraphy,Biostratigraphy,Chronostratigraphy,Chemostratigraphy,Magnetostratigraphy,Cyclostratigraphy and Sequence Stratigraphy.The ontology of Biostratigraphy,among them,is elaborated here,as no biostratigraphic ontology has been attempted before to our knowledge.The constructed biostratigraphic ontology comprises following major root classes:Fossil,Biostratigraphic unit,Biostratigraphic horizon.Altogether,they contribute to the eventual dating and correlating of strata in another root class:Biostratigraphic correlation.In summary,the achievements of this study are probably heretofore the most comprehensive ontologies for the stratigraphic domain.Moreover,a proto model of semantic search engine was conceived to discuss potential application of our work for better querying stratigraphic references,utilizing the semantic liaison of the classes in the constructed ontologies. | Huiqing Xu Yingying Zhao Hao Huang Shaochun Dong Yukun Shi Chunju Huang Huaichun Wu Zhiqi Qian Qiang Fang Huaguo Wen Zhongtang Su Shuang Dai Ronghua Wang Chao Li Chao Sun Junxuan Fan | 2023 | Geoscience Frontiers2023，14，5： | 0 |
| 11 | High-frequency polarity swings during the Gauss-Matuyama reversal from Baoji loess sediment显示文摘Paleomagnetic records of the Gauss-Matuyama reversal were obtained from two loess sections at Baoji on the Chinese Loes Plateau. Stepwise thermal demagnetization shows two obvious magnetization components. A low-temperature component iso lated between 100 and 200–250℃ is close to the present geomagnetic field direction, and a high-temperature component iso lated above 200–250℃ reveals clearly normal, reversed, and transitional polarities. Magnetostratigraphic results of both sec tions indicated that the Gauss-Matuyama reversal consists of a high-frequency polarity fluctuation zone, but the characteristic remanent magnetization directions during the reversal are clearly inconsistent. Rock magnetic experiments demonstrated tha for all the specimens with normal, reversed, and transitional polarities magnetite and hematite are the main magnetic carriers Anisotropy of magnetic susceptibility indicates that the studied loess sediments have a primary sedimentary fabric. Based on virtual geomagnetic pole latitudes, the Gauss-Matuyama reversal records in the two sections are accompanied by 14 short-lived geomagnetic episodes(15 rapid polarity swings) and 12 short-lived geomagnetic episodes(13 rapid polarity swings), respec tively. Our new records, together with previous ones from lacustrine, marine, and aeolian deposits, suggest that high-frequency polarity swings coexist with the Gauss-Matuyama reversal, and that the Gauss-Matuyama reversal may have taken more than11 kyr to complete. However, we need more detailed analyses of sections across polarity swings during reversals as well a more high-resolution reversal records to understand geomagnetic behavior and inconsistent characteristic remanent magnetiza tion directions during polarity reversals. | YANG TianShui Masayuki HYODO YANG ZhenYu ZHANG ShiHong Toshiaki MISHIMA WU HuaiChun LI HaiYan LI Yi SHI XingAn WANG Kan MA YiMing | 2014 | Science China Earth Sciences2014，57，8： | 0 |
| 12 | New Zircon SHRIMP U-Pb Ages of the Langjiu Formation Volcanic Rocks in the Shiquanhe Area,Western Lhasa Terrane and their Implications显示文摘Objective The potassic and ultrapotassic rocks relating to the India-Eurasia collision and continual plate convergence are widely distributed in the Lhasa terrane.These rocks are very important to understand the deep processes of the India-Eurasia collision and the uplift and evolution of the Tibetan Plateau.Although high-potassic volcanic rocks are also exposed in the western Lhasa terrane,their | BIAN Weiwei YANG Tianshui SHI Yuruo MA Yiming JIN Jingjie GAO Feng PENG Wenxiao ZHANG Shihong WU Huaichun LI Haiyan | 2017 | Acta Geologica Sinica(English Edition)2017，91，2： | 0 |
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