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| 1 | Geochemical and Sr-Nd-Pb isotopic compositions of volcanic rocks from the Iheya Ridge,the middle Okinawa Trough:implications for petrogenesis and a mantle source显示文摘As an active back-arc basin, the Okinawa Trough is located in the southeastern region of the East China Sea shelf and is strongly influenced by the subduction of the Philippine Sea Plate. Major element, trace element and Sr-NdPb isotopic composition data are presented for volcanic rocks from the Iheya Ridge(IR), the middle Okinawa Trough. The IR rocks record large variations in major elements and range from basalts to rhyolites. Similar trace element distribution characteristics together with small variations in ^(87)Sr/^(86)Sr(0.703 862–0.704 884), ^(144)Nd/^(143)Nd(0.512 763–0.512 880) and Pb isotopic ratios, demonstrate that the IR rocks are derived from a similar magma source. The fractional crystallization of olivine, clinopyroxene, plagioclase, and amphibole, as well as accessory minerals, can reasonably explain the compositional variations of these IR rocks. The simulations suggest that approximately 60% and 75% fractionation of an evolved basaltic magma can produce trace element compositions similar to those of the intermediate rocks and acid rocks, respectively. The analysis of their Sr-Nd-Pb isotopic content ratios suggest that the source of the rocks from the IR is close to the depleted mantle(DM) but extends to the enriched mantle(EMII), indicating that the mantle source of these rocks is a mixture between the DM and EMII end members. The simulations show that the source of the IR volcanic rocks can be best interpreted as the result of the mixing of approximately 0.8%–2.0% subduction sediment components and 98.0%–99.2% mantlederived melts. | LI Xiaohui ZENG Zhigang CHEN Shuai MA Yao YANG Huixin ZHANG Yuxiang CHEN Zuxing | 2018 | Acta Oceanologica Sinica2018，37，1： | 6 |
| 2 | Cylindrical vector beam fiber laser with a symmetric two-mode fiber coupler显示文摘We demonstrate a passively mode-locked all-fiber laser generating cylindrical vector beams(CVBs)only using a symmetric two-mode fiber optical coupler(TMF-OC)for both high-order mode excitation and splitting.Theoretical analyses show that for a symmetric TMF-OC with appropriate taper diameter,the second-order mode can be excited and coupled into output tap with high purity due to the effective index difference of different modes.Based on the fabricated TMF-OC,the passively mode-locked fiber laser delivers pulsed CVBs at a center wavelength of 1564.4 nm with 3 d B linewidth of 11.2 nm,pulse duration of 2.552 ps,and repetition rate of3.96 MHz.The purity of both radially and azimuthally polarized beams is estimated to be over 91%.Due to simple fabrication method of the TMF-OC and high purity of the generated CVBs,this mode-locked CVB fiber laser with all-fiber configuration has potential applications in optical trapping,optical communications,material processing,etc. | YANG XU SU CHEN ZHIQIANG WANG BING SUN HONGDAN WAN ZUXING ZHANG | 2019 | Photonics Research2019，7，12： | 5 |
| 3 | Mineral Chemistry Indicates the Petrogenesis of Rhyolite From The Southwestern Okinawa Trough显示文摘To reveal the petrogenesis of rhyolite from the southwestern Okinawa Trough, the mineral chemistry of plagioclase, orthopyroxene, amphibole, quartz and Fe-Ti oxide phenocrysts were analyzed using an electron microprobe, and in suit Sr and Ba contents of plagioclase analysed by LA-ICPMS were chosen for fingerprinting plagioclases of different provenances. Results indicate an overall homogeneous composition for each of the mineral phases except for plagioclase phenocrysts which have a wide range of composition(An=39~88). Plagioclase crystals characterized by An contents of >70 are not in equilibrium with their whole-rock compositions, and coarse-sieved plagioclase phenocryst interiors record high An contents(>70) and Sr/Ba ratios(>7), which are similar to the those of plagioclase crystals in basalt. Therefore, these crystals must have been introduced to the rhyolitic magma from a more mafic source. Equilibrium temperatures estimated using orthopyroxene-liquid, iron–titanium oxide, titanium-in-quartz and amphibole geothermometers show consistent values ranging from 792 to 869℃. The equilibrium pressure calculated using amphibole compositions is close to 121 MPa which corresponds to an approximate depth of 4 km. The fO_2 conditions estimated from Fe-Ti oxides and amphiboles plot slightly above the NNO buffer, which indicates that the rock formed under more oxidized conditions. Our results suggests that petrogenesis of the rhyolite due to basaltic magma ascend with the high An and Sr/Ba plaigoclases from deep magma chamber into the shallow chamber where the fractional crystallization and crustal assimilation happened. It also indicates that a two-layer magma chamber structure may occur under the southwestern Okinawa Trough. | CHEN Zuxing ZENG Zhigang WANG Xiaoyuan ZHANG Yuxiang YIN Xuebo CHEN Shuai MA Yao LI Xiaohui QI Hanyan | 2017 | Journal of Ocean University of China2017，16，6： | 4 |
| 4 | Geological,physical,and chemical characteristics of seafloor hydrothermal vent fields显示文摘Seafloor hydrothermal vent fields(SHVFs) are located in the mid-ocean ridge(MOR),backarc basin(BAB),island arc and hot-spot environments and hosted mainly by ultramafic,mafic,felsic rocks,and sediments.The hydrothermal vent fluids of SHVFs have low oxygen,abnormal pH and temperature,numerous toxic compounds,and inorganic energy sources,such as sulfuric compounds,methane,and hydrogen.The geological,physical,and chemical characteristics of SHVFs provide important clues to understanding the formation and evolution of seafloor hydrothermal systems,leading to the determination of metal sources and the reconstruction of the physicochemical conditions of metallogenesis.Over the past two decades,we studied the geological settings,volcanic rocks,and hydrothermal products of SHVFs and drawn new conclusions in these areas,including:1) the hydrothermal plumes in the Okinawa Trough are affected by the Kuroshio current;2) S and Pb in the hydrothermal sulfides from MOR are mainly derived from their host igneous rocks;3) Re and Os of vent fluids are more likely to be incorporated into Fe-and Fe-Cu sulfide mineral facies,and Os is enriched under low-temperature(<200℃) hydrothermal conditions in global SHVFs;4) compared with low-temperature hydrothermal sulfides,sulfates,and opal minerals,high-temperature hydrothermal sulfides maintain the helium(He) isotopic composition of the primary vent fluid;5) relatively low temperature(<116℃),oxygenated,and acidic environment conditions are favorable for forming a native sulfur chimney,and a 'glue pudding' growth model can be used to understand the origin of native sulfur balls in the Kueishantao hydrothermal field;and 6) boron isotope from hydrothermal plumes and fluids can be used to describe their diffusive processes.The monitoring and understanding of the physical structure,chemical composition,geological processes,and diverse organism of subseafloor hydrothermal systems will be a future hot spot and frontier of submarine hydrothermal geology. | ZENG Zhigang CHEN Zuxing ZHANG Yuxiang LI Xiaohui | 2020 | Journal of Oceanology and Limnology2020，38，4： | 4 |
| 5 | Mineralogy,geochemistry,and sulfur isotope characteristics of sediment-hosted hydrothermal sulfide minerals from the southern Okinawa Trough显示文摘Studies of the mineralogy and sulfur isotope composition of sediment-hosted hydrothermal sulfide minerals in cores are important for understanding the seafloor mineralization environment and material source and reconstructing the hydrothermal history.However,the source of ore-forming materials and the history of hydrothermal activity in the southern Okinawa Trough(SOT)remain unclear.Here,the mineralogy and sulfur isotope characteristics of sulfides from gravity core HOBAB4-S2,collected between the Yonaguni Knoll IV hydrothermal field(HF)and the Tangyin HF,was investigated.Enrichments in Zn(up to 321×10^(-6)),Cu(up to73.7×10^(-6)),and Pb(up to 160×10^(-6))and the presence of pyrite,galena,pyrrhotite and minor sphalerite and chalcopyrite provide evidence for the input of hydrothermal materials into the sediments.The pyrite morphologies include disseminated cubic,pentagonal dodecahedron,and framboidal forms.Except for minor framboidal pyrite,euhedral pyrite from core HOBAB4-S2 is mainly of hydrothermal origin with Co/Ni ratios>1 and S/Fe atomic ratios<2 in the Cu-Zn-Pb-rich layers.The occurrences of hexagonal pyrrhotite,high-Co(up to0.17%)pyrite and high-Fe sphalerite indicate that the hydrothermal precipitates formed at medium-high temperatures and low-sulfur fugacity(f S_(2))environments.The δ^(34) S values of sulfides(0.21‰–3.45‰)with low-f S_(2) mineral assemblages(e.g.,pyrrhotite±high-Fe sphalerite)in the core are significantly lower than those of magmatic rocks and seawater,indicating possible incorporation of previously formed biogenic sulfur in the sediment.Combined with the age model of the core,it is suggested that hydrothermal activity likely began in the Tangyin HF before AD 1445–1483 and that at least three active episodes may have occurred since then. | Yamin Yang Zhigang Zeng Xuebo Yin Xiaoyuan Wang Shuai Chen Haiyan Qi Zuxing Chen Bowen Zhu | 2021 | Acta Oceanologica Sinica2021，40，10： | 2 |
| 6 | Ultralarge Rabi splitting and broadband strong coupling in a spherical hyperbolic metamaterial cavity显示文摘Strong coupling(SC) between two resonant plasmon modes can result in the formation of new hybrid modes exhibiting Rabi splitting with strong energy exchange at the nanoscale. However, normal Rabi splitting is often limited to ~50–320 me V due to the short lifetime of the plasmon mode. Here, we theoretically demonstrate a record Rabi splitting energy as large as 805 me V arising from the SC between the high-Q plasmonic whispering gallery mode and high-Q cavity plasmon resonance supported by a spherical hyperbolic metamaterial cavity,which consists of a dielectric nanosphere core wrapped in 7 alternating layers of silver/dielectric materials.In addition, the new hybrid modes formed by the SC are shown to exhibit an extralong lifetime of up to 71.9–81.6 fs, with the large electric field intensity enhancement at both the dielectric core and the dielectric layers. More importantly, the spectral ranges of SC can be tuned across an ultrabroad range from the visible to the near-IR by simply changing the dielectric core size. These findings may have potential applications in bright single-photon sources. | PING GU JING CHEN SIYU CHEN CHUN YANG ZUXING ZHANG WEI DU ZHENGDONG YAN CHAOJUN TANG ZHUO CHEN | 2021 | Photonics Research2021，9，5： | 2 |
| 7 | Study on production of aerated concrete by circulating fluidized bed fly ash显示文摘 | LIU Xinzhong REN Gui CHEN Zuxing | 2009 | Acta Scientiarum Naturalium Universitatis Sunyatseni2009，48，2： | 1 |
| 8 | Novel synthesis of monoethers of hydroquinone and resorcinol on soluble polymer-supports显示文摘 | Yang Guichun Chen Zuxing Zhang Zhaojun | 2002 | Synth Commun2002，32，22： | 1 |
| 9 | A review: Non-cross-linked polystyrene bound reagents, catalysts and syntheses显示文摘 | Jianian Chen Guichun Yang Haiqing Zhang Zuxing Chen | 2006 | Reactive and Functional Polymers2006，，12： | 1 |
| 10 | Recyclable tertaaryphosphonium supported chiral imidazolidin-4-one organocatalyst for Diels Alder reactions显示文摘 | Lin Zihan Chen Zuxing Yang Guichun | 2013 | Catalysis Communications2013，35，： | 1 |
| 11 | Novel synthesis of monoethers of hydroquinone and resorcinol on soluble polymer-supports显示文摘 | Yang Guichun Chen Zuxing Zhang Zhaojun | 2002 | Synth Commun2002，32，22： | 1 |
| 12 | External-Oxidant-Free Electrochemical Oxidative Trifluoromethylation of Arenes Using CF3SO2Na as the CF3 Source显示文摘Summary of main observation and conclusion An efficient and environmentally benign electrochemical oxidative radical C-H trifluoromethylation of arenes by employing Langlois reagent as the CF3 source was developed in this work.Neither transition metal catalysts nor external chemical oxidants were required in this trifluoromethylation process.The reaction could be conducted in gram scale with high reaction efficiency. | Yong Deng Fangling Lu Siqi You Tianrui Xia Yifan Zheng Cuifen Lu Guichun Yang Zuxing Chen Meng Gao Aiwen Lei | 2019 | Chinese Journal of Chemistry2019，37，8： | 0 |
| 13 | Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry:A Case of the Bipindi Banded Iron Formations,Nyong Complex,SW Cameroon显示文摘The Bipindi iron ore district is located in the central section of the Nyong Complex at the northwestern margin of the Congo Craton in Southwest Cameroon.This iron district contains numerous iron mineralization hosted by the Mewongo,Bibole,Kouambo,and Zambi banded iron formations(BIFs).These BIFs contain magnetite as the main iron ore mineral associated with pyrite,and gangue minerals are quartz with minor chlorite and amphibole.The origin of iron ore from these BIFs was investigated using a combination of in-situ magnetite and whole-rock chemistry.The studied BIF ore samples have a narrow range of TFe between 30.90 wt.%and 43.20 wt.%,indicating a low-grade ore.The geochemical signatures of magnetite such as low contents of base metals(e.g.,Cu,Co,V,and Zn)and low Co/Zn ratios<0.85 indicate a hydrothermal origin.Combined with the geochemical features of these BIFs,e.g.,high Fe/Ti and Fe/Al ratios(mean>600 and>75,respectively),we suggest that magnetite was derived from a mixture of seawater and~0.1%low-temperature hydrothermal fluids in an oxidizing environment.Collectively,low-temperature hydrothermal and later metamorphic fluids were necessary for the transformation of the protolith Nyong Complex BIFs to iron ore. | Landry Soh Tamehe Huan Li Sylvestre Ganno Zuxing Chen Yanick Brice Lemdjou Safiyanu Muhammad Elatikpo | 2024 | Journal of Earth Science2024，35，1： | 0 |
| 14 | Non-cross-linked Polystyrene Supported Cyclosulfamide: A New Chiral Auxiliary for Highly Stereoselective Alkylation Reactions显示文摘 | LU Taotao NIE Junqi CHEN Zuxing YANG Guichun LU Cuifen | 2014 | Chemical Research in Chinese Universities2014，30，6： | 0 |
| 15 | Scope and Limitations of Optical Pure Hydantoins as Chiral Auxiliaries in Asymmetric Mannich Reactions显示文摘 | CHEN Feng LU Cuifen NIE Junqi CHEN Zuxing YANG Guichun | 2016 | Chemical Research in Chinese Universities2016，32，2： | 0 |
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