|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Metamorphic Characteristics and Tectonic Implications of the Kadui Blueschist in the Central Yarlung Zangbo Suture Zone,Southern Tibet显示文摘The Kadui blueschist is located in the central section of Yarlung Zangbo suture zone(YZSZ), southern Tibet, and has been subjected to the subduction of the Neo-Tethyan Ocean below the Asian Plate and provides important clues for better understanding the evolution of the India-Asia convergence zone. In this paper, the systematical petrographic and mineral chemical studies were carried out on the Kadui blueschist, which reveal a mineral assemblage of sodic amphibole, chlorite, epidote, albite and quartz with accessory minerals of titanite, calcite and zircon. Electron microprobe analyses demonstrate that amphibole shows zoned from actinolite core to ferrowinchite/riebeckite rim composition indicating that the sodic amphibole has formed during a prograde metamorphic event. The protolith of the blueschist is an intermediate-basic pyroclastic rock. The calculated pseudosection indicates a clockwise P-T path and constrains peak metamorphic conditions of about 5.9 kbar at 345 ℃. This condition is transitional between pumpellyite-actinolite, greenschist and blueschist facies with a burial depth of 20–22 km and a thermal gradient of 15–16 ℃/km. This thermal gradient belongs to high pressure intermediate P/T facies series and is possibly related to a warm subduction setting of young oceanic slabs. Our new findings indicate that the Kadui blueschist in the central part of YZSZ experienced a rapid subduction and exhumation process as a response to a northward subduction of the Neo-Tethyan oceanic lithosphere during the initial India-Asia collision stage. | Guangming Sun Xu-Ping Li WenYong Duan Shuang Chen Zeli Wang Lingquan Zhao Qingda Feng | 2018 | Journal of Earth Science2018，29，5： | 12 |
| 2 | Metamorphic Petrology of Clinopyroxene Amphibolite from the Xigaze Ophiolite,Southern Tibet: P-T Constraints and Phase Equilibrium Modeling显示文摘The clinopyroxene amphibolite from the Bailang terrane is located in the central section of the Yarlung Zangbo suture zone(YZSZ),southern Tibet.The study of it is expected to provide important clues for the subduction of the Neo-Tethyan Ocean below the Asian Plate and thus for better understanding of the development of the India-Asia collision zone.Based on integrated textural,mineral compositional,metamorphic reaction history and geothermobarometric studies of the clinopyroxene amphibolite within a serpentinite mélange,four overprinted metamorphic stages are established.They are the first metamorphic record of M1 stage indicated by a relict assemblage of plagioclase+clinopyroxene+amphibole,an early M2 stage characterized by an assemblage of medium-grained clinopyroxene+amphibole+plagioclase+quartz as well as rutile inclusion in titanite,which is formed during burial process,an isobaric cooling M3 stage which is characterized by an assemblage of clinopyroxene+amphibole+plagioclase+titanite,and a decomposing retrograde stage M4,which is represented by the amphibolite+plagioclase symplectite+titanite+rutile+quartz.By applying the THERMOCALC(versions 6.2 and 6.3)technique in the NCFMASHTO system,the P-T conditions estimated from M1 to M4 stages are ca.8.6 kbar/880℃,10.8–13.4 kbar/800–840℃,12.7–13.2 kbar/650–660℃ and<11.2 kbar/640℃,respectively.The mineral assemblages and their P-T conditions define a counterclockwise P-T path for the clinopyroxene amphibolite of the Xigaze ophiolite,suggesting that the rocks underwent a cooling process during burial from magmatic protolith,and a decompressing stage after the pressure peak metamorphic conditions,which implies that the Bailang terrane of the Xigaze ophiolite may have experienced subduction/collision-related tectonic processes.The peak metamorphism reaches to the transitional P-T conditions among amphibolite facies,granulite facies and eclogite facies with a burial depth of 30–40 km.After exhumation of the ophiolitic unit to the shallow crustal levels,the clinopyroxene amphibolite exposes to a high fO2 condition on the basis of the stable epidotebearing assemblage in the T-MO2 diagrams.A late subgreenschist facies overprinting subsequently occurs,the relevant mineral assemblage is prehnite+albite+chlorite+epidote+quartz. | Yancheng Zhang Xu-Ping Li Guangming Sun Zeli Wang Wenyong Duan | 2019 | Journal of Earth Science2019，30，3： | 7 |
| 3 | Regulation of Leaf Angle by Auricle Development n Maize显示文摘 | Fanying Kong Tingting Zhang Jisheng Liu Siqi Heng Qingbiao Shi Haisen Zhang Zeli Wang Lei Ge Pinghua Li Xiaoduo Lu Gang Li | 2017 | Molecular Plant2017，10，3： | 5 |
| 4 | Prevale nee and spatial distribution patterns of human echinococcosis at the township level in Sichuan Province, China显示文摘Background:Echinococcosis is a global zoonotic parasitic disease caused by Echinococcus larvae.This disease is highly endemic in Sichuan Province,China.This study investigates the prevalence and spatial distribution characteristics of human echinococcosis at the township level in Sichuan Province,geared towards providing a future reference for the development of precise prevention and control strategies. | Wei He Li-Ying Wang Wen-Jie Yu Guang-Jia Zhang Bo Zhong Sha Liao Qi Wang Rui-Rui Li Liu Yang Ren-Xin Yao Yang Liu Zeli Dan ba Sheng-Chao Qin Shi-An Wang Yan-Xia Wang Yan Huang Qian Wang | 2021 | Infectious Diseases of Poverty2021，10，3： | 2 |
| 5 | Application of a Bayesian watershed model linking multivariate statistical analysis to support watershed-scale nitrogen management in China显示文摘 | Sha Jian Li Zeli Swaney D P | 2014 | Water Resources Management2014，28，11： | 1 |
| 6 | Fine mapping a major QTL for kernel number per row under different phosphorus regimes in maize ( Zea mays L.)显示文摘 | Guodong Zhang Xiaopeng Wang Bin Wang Yanchen Tian Meng Li Yongxin Nie Qingcai Peng Zeli Wang | 2013 | Theoretical and Applied Genetics2013，，6： | 1 |
| 7 | Record of Early-Stage Rodingitization from the Purang Ophiolite Complex,Western Tibet显示文摘Rodingitization,commonly coupled with serpentinization of ultramafic rocks,bears significant information for fluid-rock interactions and element transfer from sea-floor to subduction zone environments.Numerous outcrops of rodingites are exposed along the Yarlung Zangbo suture zone(YZSZ)of southern Tibet,providing us an excellent opportunity to probe the petrogenetic processes,and unravel their implications for regional tectonic evolution.Several studies have been performed on rodingites from the eastern to central portions of the YZSZ,whereas limited work has ever been conducted on rodingitized rocks from the western segment of the YZSZ,precluding a comprehensive understanding of this lithological type.In this paper,we present detailed studies of petrology,mineral,whole-rock geochemistry and phase equilibrium modeling on a suite of newly recognized rodingites within the Purang ophiolite massif in the southwestern part of the YZSZ.The rodingites have a major metasomatic mineral association of chlorite,clinozoisite,amphibole and minor amounts of plagioclase,representing products of an early-stage rodingitization.They generally present compositions of low SiO2(48.89 wt.%–53.57 wt.%),Fe2O3^T(3.77 wt.%–5.56 wt.%),Na2O(1.31 wt.%–1.93 wt.%),Al2O3(4.78 wt.%–8.84 wt.%),moderate CaO(9.69 wt.%–11.23 wt.%),and high MgO(24.11 wt.%–26.08 wt.%)concentrations with extremely high Mg^# values[Mg^#=100×Mg/(Mg+Fe^2+)molar]of 89–92.Bulk-rock recalculation reveals that the rodingites have a protolith of mantle-derived olivine gabbro or gabbronorite.They have low rare earth element compositions(∑REE=2.4 ppm–6.5 ppm)and are characterized by flat LREE and slightly enriched HREE patterns with positive Eu anomalies;they also exhibit positive anomalies in Sr,U and Pb and negative anomalies in high-field strength elements,including Nb,P and Ti,suggesting for a subduction-zone imprinting.Phase equilibrium modeling shows that the rodingitization did take place at P<2 kbar and T=~350–400℃,consistent with low greenschist facies conditions.Taking into account of all these petrological and geochemical features,we propose that the rodingites record evidence of early-stage fluid-rock interactions between olivine gabbroic rocks and Ca-rich fluids,which may have derived from weakly serpentinized ultramafic country rocks.Although this process may initially have occurred in a mid-ocean ridge setting,an obvious overprinting by supra-subduction zone fluids in a fore-arc environment is recognized. | Songjie Wang Xu-Ping Li Wenyong Duan Fanmei Kong Zeli Wang | 2019 | Journal of Earth Science2019，30，6： | 1 |
| 8 | Enhanced energy-storage density and temperature stability of Pb_(0.89)La_(0.06)Sr_(0.05)(Zr_(0.95)Ti_(0.05))O_(3) anti-ferroelectric thin film capacitor显示文摘As the fundamental energy storage components in electronic systems,dielectric capacitors with high power densities were demanded.In this work,the anti-ferroelectric Pb_(0.89)La_(0.06)Sr_(0.05)(Zr_(0.95)Ti_(0.05))O_(3)(PLSZT)ceramics and thin film capacitor were successfully fabricated by a solid-state reaction route and pulsed laser deposition method,respectively.The ferroelectric,dielectric,energy-storage properties,and temperature stability of anti-ferroelectric PLSZT capacitor were investigated in detail.By compared with the PLSZT ceramic(energy storage density is 1.29 J/cm^(3) with an efficiency of 78.7%under 75 kV/cm),the anti-ferroelectric PLSZT thin film capacitors exhibited the enhanced energy storage density of 52.6 J/cm^(3) with efficiency of 67.7%under an electric field as high as 2068.9 kV/cm,and the enhanced energy-storage temperature stabilities from room temperature(RT)to more than 200℃ were demonstrated,and the oxygen defects mechanism and size effect were discussed.Moreover,the fast charging(~0.05 μs)and discharging(~0.15 μs)time were certified for the anti-ferroelectric PLSZT film capacitor.These findings broaden the horizon for PLSZT anti-ferroelectrics in high energy storage properties and show promising for manufacturing pulse power capacitor. | Zhenhua Tang Songcheng Hu Dijie Yao Zeli Li Zhigang Liu Xiaobin Guo Biao Lu Jingmin Fan Xin-Gui Tang Sheng-Guo Lu Ju Gao | 2022 | Journal of Materiomics2022，8，1： | 0 |
| 9 | A Knowledge Survey on Health Education of Echinococcosis Among Students — Ganzi Tibetan Autonomous Prefecture, Sichuan Province, China, 2020显示文摘Summary What is already known about this topic?Previous surveys have mainly focused on how well residents and primary school students have understood the core knowledge of echinococcosis control and are limited in terms of the comprehensiveness of the knowledge category and respondents.What is added by this report?There were some shortcomings in related knowledge of echinococcosis among students,which showed a tendency to know methods but not the rationale.The differences among regions indicated a lack of a unified system for training educators and allocating comprehensive educational material.What are the implications for public health practices?The results of this study provide evidence to potentially help improve health education programs in the new phase of echinococcosis prevention and control in China. | Xu Wang Meihua Fu Qian Wang Wei Li Zeli Danba Shuai Han Xiaozhou He Jianfeng Ba Chumu Luorong Quzhen Jiangyang Yixi Luorong Dali Chunyang Li Dandan Shi Yayi Guan Weiping Wu Ning Xiao | 2022 | China CDC weekly2022，4，8： | 0 |
| 10 | Sirolimus eye drops inhibit acute alkali-burn-induced corneal neovascularization by regulating VEGFR2 and caspase-3 expressions显示文摘Background:To investigate the effect of sirolimus(SRL)eye drops on acute alkali-burn-induced corneal neovascularization(CNV)and explore its possible mechanism.Methods:A total of 57 male Sprague-Dawley rats weighing 160-180 g were randomly divided into four groups including a normal control group(NC group,n=12),an untreated alkali-burned model control group(MC group,n=15),a blank eye drop treatment group(BT group,n=15),and an SRL eye drop treatment group(ST group,n=15).Corneal inflammation and CNV were observed and scored under a slit-lamp microscope 3,7,and 14 days after alkali exposure.Three rats were randomly sacrificed in each group before modeling and 3,7,14 days after modeling,and the corneas of right eyes were harvested for Western blotting to compare the expression levels of VEGFR2 and caspase-3.Results:Corneal inflammation scoring showed that the corneal edema and conjunctival congestion were severe in the MC,BT,and ST groups 1 day after alkali exposure but were alleviated at day 3.The corneal transparency was significantly higher in the ST group than in the MC and BT groups at days 7(F=9.77,P<0.05)and 14(F=5.81,P<0.05).At day 1,the corneal limbal vascular network was markedly filled.SNV was obvious at days 3,7,and 14.The new blood vessels were shorter and sparser in the ST group than in the MC and BT groups,and the CNV scores showed significant differences among these groups(day 3:F=8.60,P<0.05;day 7:F=11.40,P<0.05;and day 14:F=41.59,P<0.01).Western blotting showed that the expressions of VEGFR2 and caspase-3 were low before modeling and showed no significant difference among the different groups(F=0.52,P>0.05;F=0.98,P>0.05).The corneal expression of VEGFR2 became significantly higher in the MC and BT groups than in the ST group 3,7,and 14 days after alkali exposure,and there were significant differences in relative gray-scale values among these groups(day 3:F=32.16,P<0.01;day 7:F=85.96,P<0.01;day 14:F=57.68,P<0.01).The increase in the corneal expression of caspase-3 was significantly larger in the ST group than in the MC and BT groups at days 3,7,and 14,and there were significant differences in relative gray-scale values among groups(day 3:F=32.16,P<0.01;day 7:F=53.02,P<0.01;day 14:F=38.67,P<0.01).Conclusions:SRL eye drops can alleviate acute alkali-burn-induced corneal inflammation and inhibit alkali-burn-induced CNV in rat models.It can reduce VEGFR2 expression and increase caspase-3 expression in the corneal tissue,which may contribute to the inhibition of alkali-burn-induced CNV. | Yang Gao Xiangchao Yao Yujun Li Chen Cao Chulong Huang Zeli Guo Yandong Wang | 2019 | Annals of Eye Science2019，，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员