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Subaqueous volcanism in the Paleo-Pacific Ocean based on Jurassic basaltic tuff and pillow basalt in the Raohe Complex,NE China

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Science China Earth Sciences 2018年第8期61卷 1042-1056页

作者： sun mingdao XU YiGang CHEN HanLin State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Earth Science College Zhejiang University Hangzhou 310027 China

On-land records of subaqueous explosive volcanic eruptions are rarely *** understand this phenomenon and discuss its global significance,we studied the geochronology and geochemistry of basaltic tuff and pillow basalt in the Raohe Complex,NE *** basaltic tuff consists of well-sorted vitreous,crystal(mostly clinopyroxene),and minor lithic *** is characterized by a high Mg O(15.7–15.9%)content and zero Eu anomalies(Eu/Eu~*=99–102).The tuff erupted at 172±1 Ma based on SHRIMP zircon U-Pb dating,coeval with the previously reported age of the pillow *** pillow basalt has intermediate Mg O content and weakly negative Eu anomalies(Eu/Eu~*=90–99).Based on immobile trace element discrimination,the basaltic tuff and pillow basalt belong to alkali basalt displaying an OIB-type trace element pattern,and consistent Nd isotope signatures ofε_(Nd)(t)=4.4–6.2,indicating an identical mantle *** pillow basalt has coupled Sr-Nd isotopic values,whereas the basaltic tuff has significantly higher initial^(87)Sr/^(86)Sr values that are similar to synchronous *** indicates that the elemental exchange between the mantle-derived material and seawater most likely occurred in a subaqueous explosive volcanic eruption,rather than in an effusive *** calculations suggest that the high efficiency of the Sr-isotope exchange between seawater and the mantle-derived material triggered by a subaqueous explosive volcanic eruption is likely one of the main reasons for the rapid decrease of the global seawater^(87)Sr/^(86)Sr value.

关键词： Raohe Complex Subaqueous volcanism Jurassic Paleo-Pacific Ocean Seawater Sr isotope

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Generation of Cenozoic intraplate basalts in the big mantle wedge under eastern Asia

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Science China Earth Sciences 2018年第7期61卷 869-886页

作者： Yigang XU Hongyan LI Lubing HONG Liang MA Qiang MA mingdao sun State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The roles of subduction of the Pacific plate and the big mantle wedge(BMW) in the evolution of east Asian continental margin have attracted lots of attention in past years. This paper reviews recent progresses regarding the composition and chemical heterogeneity of the BMW beneath eastern Asia and geochemistry of Cenozoic basalts in the region, with attempts to put forward a general model accounting for the generation of intraplate magma in a BMW system. Some key points of this review are summarized in the following.(1) Cenozoic basalts from eastern China are interpreted as a mixture of high-Si melts and low-Si melts. Wherever they are from, northeast, north or south China, Cenozoic basalts share a common low-Si basalt endmember, which is characterized by high alkali, Fe_2O_3~T and TiO_2 contents, HIMU-like trace element composition and relatively low ^(206)Pb/^(204)Pb compared to classic HIMU basalts. Their Nd-Hf isotopic compositions resemble that of Pacific Mantle domain and their source is composed of carbonated eclogites and peridotites. The high-Si basalt endmember is characterized by low alkali, Fe_2O_3~T and TiO_2 contents, Indian Mantle-type Pb-Nd-Hf isotopic compositions, and a predominant garnet pyroxenitic source. High-Si basalts show isotopic provinciality, with those from North China and South China displaying EM1-type and EM2-type components, respectively, while basalts from Northeast China containing both EM1-and EM2-type components.(2) The source of Cenozoic basalts from eastern China contains abundant recycled materials, including oceanic crust and lithospheric mantle components as well as carbonate sediments and water. According to their spatial distribution and deep seismic tomography, it is inferred that the recycled components are mostly from stagnant slabs in the mantle transition zone,whereas EM1 and EM2 components are from the shallow mantle.(3) Comparison of solidi of garnet pyroxenite, carbonated eclogite and peridotite with regional geoth

关键词： Big mantle wedge Subduction of west Pacific plate Cenozoic intraplate basalt Eastern China East Asia

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形塑皇帝:万历前期馆阁应制与宫廷绘画活动中的权力

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文艺研究 2023年第5期 144-160页

作者：孙明道曲阜师范大学美术学院

在明代内阁制度发展史上,隆庆六年七月至万历十年六月是最为特殊的十年。这一时期,“代王行政”的张居正使文渊阁成为真正的权力中心,也使与之毗邻的文华殿成为对皇帝实施教育的真正所在。此时发生在文华殿中的绘画鉴赏和进献活动,辅以... 详细信息

在明代内阁制度发展史上,隆庆六年七月至万历十年六月是最为特殊的十年。这一时期,“代王行政”的张居正使文渊阁成为真正的权力中心,也使与之毗邻的文华殿成为对皇帝实施教育的真正所在。此时发生在文华殿中的绘画鉴赏和进献活动,辅以馆阁官员的应制诗写作,体现了参与各方之间的权力关系。明代内阁权力随皇帝和阁臣个性变化的特性,在造成万历时期政治跌宕的同时,也促进了万历前期由皇帝和馆阁官员参与的宫廷绘画活动的繁荣。这一时期因文官理念和理想的投入,万历皇帝的形象出现在表现王朝礼仪的绘画中,推动了明代帝王图对表现皇帝私人兴趣的行乐图、好道图的超越,在展现皇威、记录历史、传达治世理念等方面为明代宫廷绘画增添了历史和政治高度。但因参与者的权力变化,这一局面最终无以为继。

关键词：馆阁万历皇帝万历十年宫廷绘画文华殿应制诗万历时期文渊阁

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2-9 Research Progress in the Exotic Nuclei Group

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IMP & HIRFL Annual Report 2015年第1期 62-63页

作者： Liu Zhong Huang Tianheng Ding Bing Zhang Wenqiang sun mingdao Liu Xiaoyu 不详

We joined the SEASTAR (Shell Evolution And Search for 2+ energies At RIBF) collaboration at RIKEN and are analyzing the data of n-rich V and Mn isotopes with N 40. Three -rays in each of 63;65;67Mn are *** ?? coincidence relationships are being analyzed for establishing their level schemes. The progress in the data analysis is presented in Ref. [1].

关键词： Exotic Nuclei Group

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2-10 Identi cation of a Positive-parity Band in 117Ba

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IMP & HIRFL Annual Report 2015年第1期 63-64页

作者： Ding Bing Liu Zhong Huang Tianheng sun mingdao Zhang Wenqiang Liu Xiaoyu Lu Hongyang 不详

The Z=56 barium nuclei represent one of the best example of an isotopic chain to explore the evolution of quadrupole deformation as the neutron number decreases. The neutron-deficient barium isotopes with mass number A ranging from 120 to 130 could be easily produced by the heavy-ion fusionevaporation reactions, and thus have been well studied in ray spectroscopy experiments.

关键词： Positive-parity Band reaction

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2-18 Research Progress in the Exotic Nuclei Group

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IMP & HIRFL Annual Report 2016年第1期 52-53页

作者： Liu Zhong Huang Tianheng Ding Bing Zhang Wenqiang sun mingdao Liu Xiaoyu Lu Hongyang 不详

Digital decay spectroscopy of actinide isotopes at the gas filled separator SHANS All over the chart of nuclides,the region to the“north-east”of 208Pb,with Z≥84 and N=128~130,hosts the shortest-livedαradioactivities,with half-lives in the range of nanoseconds to *** and detection of neutron-deficient isotopes above thorium in this region are challenging due to their low production cross sections and short half-lives.

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2-20α-decay Studies of 220Pa Using Digital Pulse Processing Technique

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IMP & HIRFL Annual Report 2016年第1期 55-56页

作者： Huang Tianheng sun mingdao Liu Zhong Zhang Wenqiang Liu Xiaoyu Ding Bing Lu Hongyang 不详

Theα-decay of neutron-deficient heavy nuclei far from stability is an indispensable spectroscopic tool to study their low-energy structure.220Pa,a trans-lead isotope near the shell closure N=126,its decay properties are still not well established,though it was studied in twoα-decay experiments 30 years ago[1,2].Recently,we applied successfully the modern digital pulse processing(DPP)technique[3,4]to the decay spectroscopy in the Z≥91 and N=128~131 region[5]and the decay chain of 220Pa was established at the first time.

关键词： Pulse pulse tool its was far

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2-19 First Identification of theγh11/2 band in 117Ba

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IMP & HIRFL Annual Report 2016年第1期 53-54页

作者： Ding Bing Liu Zhong Huang Tianheng sun mingdao Zhang Wenqiang Liu Xiaoyu Lu Hongyang 不详

Taking advantage of the largeγ-detector array Gammasphere and the recoil mass separator FMA,highspin states in 117Ba were investigated through the recoil-β-delayed proton decay tagging technique via the heavy-ion induced fusion-evaporation reaction 64Zn(58Ni,2p3n)117Ba,at a beam energy of 305 ***γrays belonging to 117Ba have been identified furthermore,a rotational band has been identified for the first time and presented as band A in Fig.1.

关键词： advantage FMA via has

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2-23 Study of the Octupole Deformation Properties in 224U Using the RDT Method

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IMP & HIRFL Annual Report 2016年第1期 59-60页

作者： Zhang Wenqiang Liu Zhong Huang Tianheng Ding Bing sun mingdao Liu Xiaoyu Lu Hongyang 不详

The nuclear reflection asymmetry is attributed to octupole correlation,i:e:the coupling between single-particle orbits with opposite parities andΔl/Δj/3 near the Fermi *** strongest correlations tend to occur just above closed shells,namely at particle(proton or neutron)numbers 34(g9/2■p3/2 coupling),56(h11/2■d5/2 coupling),88(i13/2■f7/2 coupling)and 134(j15/2■g9/2 coupling).An overview of the experimental and theoretical evidence for octupole correlations is given in Ref.[1].

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Research Progress in the Exotic Nuclei Group

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IMP & HIRFL Annual Report 2017年第1期 37-39页

作者： Liu Zhong Huang Tianheng Ding Bing Zhang Wenqiang sun mingdao Liu Xiaoyu Lu Hongyang Hou Dongsheng 不详

Digital decay spectroscopy of actinide isotopes at the gas lled separator SHANS Deacy spectroscopy of nuclei with Z>90 were performed using the ^(187)Re+^(40)Ar reaction with isotopically enriched 187Re *** 40Ar beam was accelerated to 188 MeV by the Sector-Focusing Cyclotron(SFC)of the Heavy Ion Research Facility in Lanzhou(HIRFL).The beam intensity on target,monitored via Faraday Cups upstream and downstream of the target chamber,was around 320 pnA in average during the entire experiment of 110 h.

关键词： beam Faraday decay

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