|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | SIMS U-Pb zircon age of a tuff layer in the Meishucun section, Yunnan, southwest China: Constraint on the age of the Precambrian-Cambrian boundary显示文摘Determination of the age of the Precambrian-Cambrian boundary is critical in understanding early evolution of life on Earth. SIMS U-Pb zircon analyses of the Bed 5 tuff layer of the Meishucun section were carried out closely following the guidance of cathodoluminescence images, and the majority of analyses were conducted on the oscillatory zircon grains. Thirteen measurements yield a highly reliable Concordia U-Pb age of 536.7 ± 3.9 Ma for the Bed 5 horizon. A grand mean of 206Pb/238U age of 535.2± 1.7 Ma (MSWD = 0.53) is calculated based on 13 concordant SIMS measurements of this study and 4 nano-SIMS measurements of Sawaki et al., which is the best estimate of the deposition age of the tuff layer within Bed 5 in the Meishucun section. This age has provided a robust age constraint on the significant Precambrian-Cambrian boundary strata in southern China, which independently suggested the placement of the Precambrian-Cambrian boundary at the bottom of the Xiaowaitoushan Member (Marker A). | RiXiang Zhu XianHua Li XianGuang Hou YongXin Pan Fei Wang ChengLong Deng HuaiYu He | 2009 | Science China Earth Sciences2009，52，9： | 24 |
| 2 | ^(40)Ar/^(39)Ar chronology and geochemistry of high-K volcanic rocks in the Mangkang basin, Tibet显示文摘Our two newly obtained high-quality 40Ar/39Ar ages suggest that the high-K volcanic rocks of the Lawuxiang Formation in the Mangkang basin, Tibet were formed at 33.5 ( 0.2 Ma. The tracing of elemental and Pb-Sr-Nd isotopic geochemistry indicates that they were derived from an EM2 enriched mantle in continental subduction caused by transpression. Their evidently negative anomalies in HFSEs such as Nb and Ta make clear that there is an input of continental material into the mantle source. The high-K rocks at 33.5 ( 0.2 Ma in the Mangkang basin may temporally, spatially and compositionally compare with the early one of two-pulse high-K rocks in eastern Tibet distinguished by Wang J. H. Et al., implying that they were formed in the same tectonic setting. | ZHANG Huihua, HE Huaiyu, WANG Jianghai & XIE Guanghong Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China College of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China | 2005 | Science China Earth Sciences2005，48，1： | 13 |
| 3 | Effect of gas emissions from Tianchi volcano (NE China) on environment and its potential volcanic hazards显示文摘The Tianchi volcano in the Changbai Mountains is located on the boundary between China and North Korea. There are many times of eruptions of the Tianchi volcano during the Holocene. One of its large eruptions occurred around 1000 years ago dated by 14C method and historical records. Composition of products of the largest Tianchi volcanic eruption studied is characterized by comendi- tic Plinian fallout and unwelded ignimbrite, which are mainly distributed in China and North Korea. Caldera is about 4.4 km long and 3.4 km wide, which had filled with water (e.g. Tianchi Lake). The Tianchi volcanic cone is about 2700 m high above sea level. The Tianchi Lake is located on the summit of the volcanic cone, that is also highest peak of the Changbai Mountains in northeastern China. This study analyzed Cl, F, S and H2O concentrations of melt inclusions in the phenocryst min- erals (anorthoclase and quartz) and co-existing matrix glasses using the electron microprobe and estimated environmental effect of Tianchi volcanic gases. The authors proposed a new method to evaluate future eruption of active volcano and estimate potential volcanic hazards based on contents of volatile emissions. Using this method, we made a perspective of future volcanic hazard in this re- gion. | GUO Zhengfu LIU Jiaqi HAN Jingtai HE Huaiyu DAI Guoliang YOU Haitao | 2006 | Science China Earth Sciences2006，49，3： | 9 |
| 4 | Rapid drift of the Tethyan Himalaya terrane before two-stage India-Asia collision显示文摘The India-Asia collision is an outstanding smoking gun in the study of continental collision dynamics.How and when the continental collision occurred remains a long-standing controversy.Here we present two new paleomagnetic data sets from rocks deposited on the distal part of the Indian passive margin,which indicate that the Tethyan Himalaya terrane was situated at a paleolatitude of∼19.4°S at∼75 Ma and moved rapidly northward to reach a paleolatitude of∼13.7°N at∼61 Ma.This implies that the Tethyan Himalaya terrane rifted from India after∼75 Ma,generating the North India Sea.We document a new two-stage continental collision,first at∼61 Ma between the Lhasa and Tethyan Himalaya terranes,and subsequently at∼53−48 Ma between the Tethyan Himalaya terrane and India,diachronously closing the North India Sea from west to east.Our scenario matches the history of India-Asia convergence rates and reconciles multiple lines of geologic evidence for the collision. | Jie Yuan Zhenyu Yang Chenglong Deng Wout Krijgsman Xiumian Hu Shihu Li Zhongshan Shen Huafeng Qin Wei An Huaiyu He Lin Ding Zhengtang Guo Rixiang Zhu | 2021 | National Science Review2021，8，7： | 7 |
| 5 | He and Ar isotope geochemistry of pyroxene megacrysts and mantle xenoliths in Cenozoic basalt from the Changle–Linqu area in western Shandong显示文摘We performed a combined study of He–Ar isotopes and element geochemistry for pyroxene megacrysts and mantle xenoliths from Cenozoic basalt in the Changle–Linqu area in western Shandong.The results are used to trace the evolution of subcontinental lithospheric mantle after destruction of the North China Craton.The3He/4He ratios of pyroxene megacrysts,websterite,and dunites are 7.0–7.7 Ra,7.4 Ra,and 7.0–7.7 Ra,respectively.They are related to the origin of host basalts,and are slightly lower than that of mid-ocean ridge basalts(MORB).Their40Ar/36Ar ratios are much lower than that of MORB and close to that of air.The lherzolites and wehrlites represent the fragments of the newly accreted lithospheric mantle,and their REE and trace elements indicate that they experienced melt metasomatism and partial melting.The3He/4He ratios of their olivine are slightly lower than that of MORB,but3He/4He ratios of their clinopyroxene are low(2.3–7.1 Ra)and display an inverse correlation with(La/Yb)N.The40Ar/36Ar ratios of these clinopyroxene are much lower than that of MORB and close to the air ratio.Combining existing studies of petrology,Sr–Nd–Pb isotopes,O isotopes,trace elements,and Mg isotopes,we infer that the juvenile lithospheric mantle in the Changle–Linqu area was metasomatized by oceanic crust-derived melts,which transfer the supracrustal Ar isotope signatures to the mantle sources.The low4He abundance and low3He/4He ratios of clinopyroxene in the lherzolites and wehrlites are ascribed to metasomatism by crustal melts from the subducted Pacific plate. | Fei Su Yan Xiao Huaiyu He Benxun Su Ying Wang Rixiang Zhu | 2014 | Chinese Science Bulletin2014，59，4： | 6 |
| 6 | Intercalibration of international and domestic ^(40)Ar/^(39)Ar dating standards显示文摘Four international standards, Ga1550, MMhb-1, Lp-6, Bern 4M, and one domestic standard BT-1 have been intercalibrated. The repeated measurements on MMhb-1 with different mass demonstrate that MMhb-1 is inhomogeneous in age and its average age is 519.8 Ma. The results of Bern 4M and Lp-6 reflect that they have an invariable value of 40Ar*/39Ark (F) and the ages we obtained are consensus with their K-Ar age: Lp-6=127.7Ma; Bern 4M=18.2 Ma. Analyses of BT-1 age spectra, Ca/K and Cl/K spectra as well as inverse isochrons indicate that the sample is homogeneous and invariable and keeps close chemically, with its trapped argon isotope composition close to the at- mosphere. The dating results show that age values are reproducible and steady, total fusion age, step-heating age, plateau age and isochron age are in accord with each other within the error range (2σ). Therefore, we recommend 28.7 Ma as the calibrated age of BT-1. We also discuss the variation in neutron flux gradients of Beijing 49-2 reactor. It was found that the neutron flux gradient varies considerably, and more monitors (standard samples) are needed to fix the trend of variation. The coefficient of the 49-2 reactor that transfers the ratio of production rate of 37ArCa/39ArK into Ca/K ratio is 1.78. This is different from that reported earlier, 2.0, which may be caused by the reconstruction of the reactor. | WANG Fei HE Huaiyu ZHU Rixiang SANG Haiqing WANG Yinglan YANG Liekun | 2006 | Science China Earth Sciences2006，49，5： | 6 |
| 7 | Stratigraphy and age of the Daohugou Bed in Ningcheng,Inner Mongolia显示文摘Recent fieldwork has extended the distribution of the Daohugou Bed deposits from the Daohugou Village to its several neighboring areas. The fossil-bearing Daohugou deposits uncomformably overlie complex bedrocks, and com- prise three major parts. The red shales in the lower part were misidentified as belonging to the Tuchengzi Formation. Field excavation has indicated that the shales of upper part of the bed are the major fossil-bearing horizon. Due to strong tectonic activities, sediments were often folded with the se- quences inverted in the region. Some newly recognized con- tacts between the Daohugou Bed and the volcanic rocks showed that the ignimbrite of the Tiaojishan Formation (159―164 Ma) underlies the Daohugou deposits, rather than overlying the latter as previously proposed. Thus, the age of the Daohugou deposits should be younger than the age of the ignimbrite, and thus it was incorrect to correlate the Dao- hugou Bed with the Middle Jurassic Jiulongshan Formation. Although biostratigraphic studies based on conchostracans and insects support a Middle Jurassic-early Late Jurassic age for the Daohugou deposits, vertebrate fossils such as Liaoxitriton, Jeholopterus and feathered maniraptorans show much resemblance to those of the Yixian Formation. In other words, despite the absence of Lycoptera, a typical fish of the Jehol Biota, the Daohugou vertebrate assemblage is closer to that of the Early Cretaceous Jehol Biota than to any other biota. We propose that the Daohugou fossil assemblage probably represents the earliest evolutionary stage of the Jehol Biota based on both vertebrate biostratigraphy and the sedimentological and volcanic features which suggest the Daohugou deposit belongs to the same cycle of volcanism and sedimentation as the Yixian Formation of the Jehol Group. | WANG Xiaolin ZHOU Zhonghe HE Huaiyu JIN Fan WANG Yuanqing ZHANG Jiangyong WANG Yuan XU Xing ZHANG Fucheng | 2005 | Chinese Science Bulletin2005，50，20： | 6 |
| 8 | 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 |
| 9 | Laser step-heating ^(40)Ar/^(39)Ar dating on young volcanic rocks显示文摘An attempt was made to use CO_2 laser step-heating method to date the late Pleistocene basaltic groundmass (DF-2) from Tengchong volcanic field. Among the fourteen heating steps, ten define a good inverse isochron (MSWD = 1.4) with an age of 32.2 ± 7.1 ka (2 σ).The inverse isochron also shows that the initial argon isotopic ratio is 297.1±2.0 (2σ) which is the same as the atmospheric argon at the 2σ error level. Study indicates that it is a useful means to date young volcanic groundmass with low K content by using CO_2 laser step-heating ^(40)Ar/^(39)Ar method. | WANG Fei HE Huaiyu ZHU Rixiang YANG Liekun SANG Haiqing WANG Yinglan | 2006 | Chinese Science Bulletin2006，51，23： | 4 |
| 10 | Nature and evolution of the lithospheric mantle revealed by water contents and He-Ar isotopes of peridotite xenoliths from Changbaishan and Longgang basalts in Northeast China显示文摘The nature and evolution of the lithospheric mantle underlying Northeast(NE)China were investigated by assessing the mineral chemistry,water contents,and noble gas(He-Ar)isotopes of peridotite xenoliths captured by Cenozoic basalts from the Changbaishan and Longgang regions.The xenoliths,which have863–1141℃ equilibration temperatures,primarily comprise spinel lherzolites and rare spinel harzburgites.The Mg#(Fo)values of olivine in the peridotite xenoliths vary from 86.9 to 91.3.The clinopyroxenes have high Ti/Eu and low(La/Yb)N,and their chondrite-normalized rare earth elements(REEs)exhibit light REE-depletion to-enrichment patterns,indicating that the mantle underneath the investigated region was predominantly subjected to partial melting(1%–10%)and was metasomatized by silicate melts.The measured3He/4He ratios of the Changbaishan xenoliths have a narrow range from 5.8 Ra to 8.4 Ra with an average of 7.4 Ra.The3He/4He isotopic ratios of the Longgang xenoliths varied from 4.7 Ra to8.1 Ra with an average of 5.9 Ra;slightly lower than the Changbaishan xenoliths.The whole-rock H2Ocontents of the studied peridotite ranged from 9 to 132 ppm.The high H2O contents in excess of50 ppm(up to 132 ppm)might represent newly accreted and cooled asthenospheric materials,while those with H2O contents lower than 50 ppm(as little as 9 ppm)may represent thinned,relic,ancient lithospheric mantle.These geochemical evidences,in combination with published data,indicated that the lithospheric mantle beneath the Changbaishan and Longgang in NE China is dominated by the younger and more fertile lithospheric mantle with a minor ancient and refractory keel.In addition,the lithospheric mantle of this area was metasomatized by melts related to the recent subduction event(e.g.,Pacific oceanic plate).Therefore,the westward-dipping Pacific oceanic plate subduction had an important contribution to the transformation of the lithospheric mantle beneath NE China. | Qinghu Xu Jiaqi Liu Huaiyu He Yunhui Zhang | 2019 | Science Bulletin2019，64，18： | 4 |
| 11 | Characteristics of carbonaceous aerosol in the region of Beijing, Tianjin, and Hebei, China显示文摘 | Zhao Pusheng Dong Fan Yang Yadong He Di Zhao Xiujuan Zhang Wenzong Yao Qing Liu Huaiyu | 2013 | Atmospheric Environment2013，，： | 2 |
| 12 | Timing of the Jiufotang Formation (Jehol Group) in Lia- oning, northeastern China and its implications 显示文摘 | HE Huaiyu WANG Xiao-lin ZHOU Zhong-he | 2004 | Geophysical Research Letters2004，31，12： | 1 |
| 13 | New agedetermination of the Cenozoic Lunpola basin, central Tibet 显示文摘 | He Huaiyu Sun Jimin Li Qiuli Zhu Rixiang | 2012 | Geol Mag2012，149，14： | 1 |
| 14 | HMM-based malicious user detection for robust collaborative spectrum sensing显示文摘 | He Xiaofan Dai Huaiyu Ning Peng | 2013 | IEEE Journal on Selected Areas in Communications2013，31，11： | 1 |
| 15 | Thermo-kinetic connectivity by integrating thermo-kinetic correlation and generalized stability显示文摘Designing structured materials with optimized mechanical properties generally focuses on engineering microstructures,which are closely determined by the processing routes,such as phase transformations(PTs)and plastic deformations(PDs).Both PTs and PDs follow inherent trade-off relation between thermodynamic driving force ΔG and kinetic energy barrier Q,i.e.,so-called thermo-kinetic correlation.By analyzing nucleation and growth and proposing a conception of negative driving force integrating strain energy,interface energy and any kind of energy that equivalently inhibits the PT itself,ΔG^(S),unified expressions for the thermo-kinetic correlation and generalized stability(GS)were derived for three kinds of PTs,i.e.,diffusive PTs with simultaneously decreasedΔG and increased Q,diffusive PTs with simultaneously increasedΔG and decreased Q,and displacive PTs with simultaneously increased ΔG and decreased Q.This leads to so-called thermo-kinetic connectivity by integrating the thermo-kinetic correlation and the GS,where,by application in typical PTs,it was clearly shown,a criterion of high ΔG-high GS can be predicted by modulating chemical driving force,negative driving force and kinetic energy barrier for diffusion or nucleation.Following thermo-kinetic connectivity,analogous procedure for dislocation evolution upon PDs was performed,and materials design in terms of the highΔG-high GS criterion was discussed and prospected. | Yuqing He Shaojie Song Jinglian Du Haoran Peng Zhigang Ding Huaiyu Hou Linke Huang Yongchang Liu Feng Liu | 2022 | Journal of Materials Science & Technology2022，，32： | 1 |
| 16 | Potassic magmatism in western Sichuan and Yunnan provinces, SE Tibet, China: Petrological and geochemical constraints on petrogenesis 显示文摘 | Guo Zhengfu Hertogen J Liu Jiaqi Pasteels P Boven A Punzalan L He Huaiyu Luo Xiangjun Zhang Wenhua | 2005 | J Petrol2005，46，1： | 1 |
| 17 | Structures and mechanism for the design of highly potent glucocorticoids显示文摘glucocorticoid 药的进化被降低讨厌的副作用的需求驾驶,当保留有益的反煽动性的效果时。当许多不受欢迎的副作用与高剂量的 glucocorticoids 的使用被联系,力量是这进化的一个重要方面。副作用能被最小化由高度有势力 glucocorticoids 在更低的剂量完成一样的治疗效果。这个要求推进了有增加的力量的合成 glucocorticoids 的连续发展,而是他们的力量的结构的基础糟糕被理解。决定位于力量下面的机制,我们解决了 ligand 有约束力的领域(LBD ) 绑了在它的内长的 ligand 的 glucocorticoid 受体(GR ) 的 X 光检查结构,皮质醇,有相对低的力量,并且一高度有势力合成 glucocorticoid, mometasone furoate (MF ) 。皮质醇界限 GR LBD 表明在类固醇 A 的 C1-C2 单个契约的灵活性响为与 GR 的皮质醇的低亲密关系主要负责。相反,我们证明 MF 的高力量被它的 C-17α 完成;完全充满 ligand 有约束力的衣袋的 furoate 组,因此为高亲密关系的绑定提供另外的锚接触。ligand 有约束力的衣袋里的单个氨基酸, Q642,在在 MF 和皮质醇之间的 ligand 力量起一个区别作用。基于结构的设计与许多改进力量和功效导致了几新奇 glucocorticoids 的合成。一起,这些结果揭示 glucocorticoid 力量的关键结构的机制并且为高度开发小说提供一个合理基础有势力 glucocorticoids。 | Yuanzheng He Wei Yi Kelly Suino-Powell X Edward Zhou W David Tolbert Xiaobo Tang Jing Yang Huaiyu Yang Jingjing Shi Li Hou Hualiang Jiang Karsten Melcher H Eric Xu | 2014 | Cell Research2014，24，6： | 1 |
| 18 | Analysis of synonymous codon usage in Zea mays显示文摘 | Hanmei Liu Rui He Huaiyu Zhang Yubi Huang Mengliang Tian Junjie Zhang | 2010 | Molecular Biology Reports2010，，2： | 1 |
| 19 | A Byzantine Attack Defender in Cognitive Radio Networks:The Conditional Frequency Check显示文摘 | Xiaofan He Huaiyu Dai Peng Ning | 2013 | IEEE Transactions on Wireless Communications2013，12，5： | 1 |
| 20 | Hmm-based Malicious User Detection for Robust Collaborative Spectrum Sensing显示文摘 | He Xiaofan Dai Huaiyu Ning Peng | 2013 | IEEE Journal on Selected Areas in Communications2013，31，11： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员