|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | U-Pb zircon geochronology, geochemistry and kinetics of the Huaniushan A-type granite in Northwest China显示文摘The Huaniushan granite is located at the Beishan orogenic belt, northwestern China. At the contact zone between the granite and marble, a hydrothermal Pb-Zn and skarn Au deposit is formed. LA-ICP-MS zircon U-Pb dating yielded a weighted mean 206Pb/238U age of 229.5±2.6 Ma (MSDW=0.93) for the Huaniushan granite, imply-ing its Late Triassic intrusion. Geochemistry analyses show that the Huaniushan granite is enriched in Si, K, Na, and REE, and depleted in Mg and Ca, with contents of SiO2 (70.8% to 74.4%), Na2O+K2O (8.8% to 10.2%), CaO (0.93% to 1.44%), and MgO (0.14% to 0.48%). REE is characterized by obvious negative Eu anomaly. Rb, Th, U, K, Pb, Nb, Zr and Hf elements are rich in the granite while Ba, Sr, P, Ti and Eu are deplete. The granite has a high (Zr+Nb+Ce+Y) abundance and 104 Ga/Al ratios. Petrology, major and trace elements data all indicate that the Hua-niushan granite is A-type granite which intruded in a post-collisional extensional tectonic setting. The magma was dominantly sourced from partial melting of crustal intermediate-felsic igneous rocks. Intensive magmatic activities and Au-Cu-Mo mineralization occurred throughout the Beishan orogenic belt during the period from ca. 240 to 220 Ma. | ZHU Jiang LÜ Xinbiao CAO Xiaofeng MO Yalong CHEN Chao | 2012 | Chinese Journal Of Geochemistry2012，31，1： | 10 |
| 2 | Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction显示文摘Introduced a method of synthesizing hierarchical EU-1 zeolite with organosilanes as additive, and studied the influences of following different kinds of organosilanes on the synthesis of hierarchical EU-1 zeolite: γ-glycidoxy propyl trimethoxy silane(GPTMS), N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxyl silane(APAEDMS),and N-(β-aminoethyl)-γ-aminopropyl dimethoxyl(ethyoxyl) silane(TMPED). The hierarchical EU-1 samples were characterized by XRD, SEM, N_2 adsorption, FT-IR and NH_3-TPD to analyze the crystallinity, morphology, surface area, pore size distribution and acidity. The results showed that hierarchical EU-1 zeolites were successfully synthesized; organosilanes have great influence on crystal morphology of EU-1 zeolites; the exterior surface area of hierarchical EU-1 zeolite, which synthesized with organosilanes(APAEDMS) adding into synthesis system, increased by 62.1% and mesopore volume increased by 129.1% compared with conventional EU-1 zeolites, thus can reduce the diffusional restriction markedly in catalytic reaction. The catalytic performance of hierarchical EU-1zeolites were evaluated in m-xylene isomerization on fixed bed reactor. The catalytic data showed that the isomerization activity PX/X of the hierarchical EU-1 zeolites reached around 24.09% in theoretical thermodynamic equilibrium from 23.83%, and the selectivity of C_8 aromatic hydrocarbon increased from 75.16% to 84.87%. The conversion of p-xylene increased from 16.30% to 18.41%. | Xiaofeng Li Pengchao Ren Yanting Zhang Xiaozhen Liu Xiaotao Sun Meng Gao Miaojuan Jia Zhiping Lü Tao Dou | 2016 | Chinese Journal of Chemical Engineering2016，24，11： | 4 |
| 3 | Improved Visible-light Photocatalytic Properties of ZnFe2O4 Synthesized via Sol-gel Method Combined with a Microwave Treatment显示文摘 | FENG Jing WANG Yuting ZOU Linyi LI Bowen HE Xiaofeng Lü Shengna CHEN Tingting | 2015 | Chemical Research in Chinese Universities2015，31，3： | 2 |
| 4 | Zircon SIMS U-Pb Age of the Shaxinan Melagabbro, Eastern Tianshan and Constraints on Fe-Ti-V Oxide Mineralization显示文摘Objective The late Paleozoic Fe-Ti-V oxide deposit of the eastern Tianshan is an important orthomagmatic deposit type in the Central Asia Orogenic Belt(CAOB).A series of Fe-Ti-V oxide deposits and mineralized mafic-ultramafic intrusions have been recognized recently,such as those in Hongliangzi,Weiya,Yaxi,Shaxinan and Shaxi on the Central Tianshan massif,and Niumaoquan on the | SHI Yu WANG Yuwang WANG Jingbin MAO Qigui XIE Hongjing ZHOU Guochao ZHU Jiangjian WEI Xiaofeng Lü Xiaoqiang | 2018 | Acta Geologica Sinica(English Edition)2018，92，5： | 2 |
| 5 | Silicon saturation coefficient changes in hydrogarnets during the Bayer process with lime addition显示文摘The relationship between the silicon saturation coefficient of hydrogarnets and Bayer reaction parameters was studied. The peak position, crystal plane spacing, and cell edge length of typical hydrogarnet patterns were calculated to find the key factors influencing the relationship. The results showed that the crystal face(420) is the optimal garnet growth direction during hydration and crystal growth along the faces(521) and(611) were not affected significantly by the varying experimental conditions. The reaction temperature significantly influenced the silicon saturation coefficient of hydrogarnets. The silicon saturation coefficient of hydrogarnets increased from 0.2 to about 1.0 in the temperature range of 30–270 °C and a rapid expansion process was observed in the temperature range of 120–150 °C. Moreover, the reaction time, alumina concentration, and C/S were shown to be less important factors. Averaging the results obtained by the 3 methods was shown suitable for calculating the SiO2 saturation coefficient of hydrogarnets. The calculated results of the Al2O3 and SiO2 contents matched the actual ones. However, the actual SiO2 content was about10 % less than the calculated one for SiO2 saturation coefficients higher than 1. | Guozhi Lü Ting’an Zhang Xiaofeng Zhu Chaozhen Zheng Yanxiu Wang Weiguang Zhang Zimu Zhang | 2019 | Chinese Journal of Chemical Engineering2019，27，8： | 2 |
| 6 | LA-ICP-MS U-Pb zircon geochronology and Hf isotope, geochemistry and kinetics of the Daxigou anorthosite from Kuruqtagh block, NW China显示文摘Kuruqtagh block is the best area for Precambrian geology in Xinjiang Autonomous Region, NW China, since it exposed complete Precambrian lithology units. The study of this ancient base will deepen the understanding of the Precambrian evolution of the Tarim Basin. In this paper, we studied the petrology, geochemistry, zircon LA-ICPMS U-Pb chronology and zircon Hf isotope of Daxigou anorthosite(DA) which is located at the northern margin of Tarim craton and discussed the rock formation, tectonic and geological significance. Zircons from the intrusions display oscillatory zoning and high Th/U ratios(0.39–1.35), implying their magmatic origin. Zircon LA-ICP-MS U-Pb dating results indicate that they formed during the Paleoproterozoic age with the weighted 206Pb/238 U average age of 1818±9 Ma, which is significantly different from former's Neoproterozoic age, and is coincidentally identical with its associated syenite granite age within the error range. Studies on petrogeochemistry suggest that DA belongs to medium-sodium peraluminous alkaline type, rich in Pb, La, Th and LILE, and poor in HFSE(Gd, Nd, and Ta). The chondrite-normalized REE pattern is slightly to the right form. The average ∑REE is 317.2×10-6; HREE show moderate fractionation [average LREE/HREE is 14.71, average(La/Yb)N is 24.77; average(La/Sm)N is 3.85, and average(Gd/Yb)N is 3.46]; and the δEu and δCe are not obvious. Their initial Hf isotope ratios and Hf two-stage model ages range from-6.6 to-4.43 and 2.63 to 2.74 Ga, respectively. Taken together, it is suggested that Daxigou anorthosite is a typical volcanic anorthosite and its primary magma could be contaminated by the partial melt Neoarchaean crust and mainly formed in the arc environment, which recoded the tectonic-magma activities response of the Tarim refers to the amalgamation of the supercontinent Columbia. | YUAN Qian CAO Xiaofeng Lü Xinbiao WANG Xiangdong YANG Enlin LIU Yuegao RUAN Banxiao LIU Hong MUNIR Mohammed Abdalla Adama | 2014 | Chinese Journal Of Geochemistry2014，33，3： | 2 |
| 7 | Indexing and querying xml using extended dewey labeling scheme 显示文摘 | Lu Jiaheng Meng Xiaofeng Tok W L | 2011 | Data & Knowledge Engineering2011，70，1： | 1 |
| 8 | Efficiency of cotton bollworm (Helicoverpa armigera Hübner) control of different Bt cotton varieties in North China显示文摘Background: The cotton bollworm(Helicoverpa armigera) is one of cotton's most destructive insect pests in terms of yield and quality. Since 1997, China has grown commercially available transgenic Bacillus thuringiensis(Bt) cotton. We aimed to investigate the variation in resistance of transgenic Bt cotton varieties to cotton bollworm in North China.Methods: Populations of cotton bollworm were monitored from 2008 to 2015 in environments where Bt cotton was planted adjacent to other non-Bt crops. The study included 197 Bt cotton varieties planted in 42 counties/locations in three provinces(Hebei, Shandong and Henan) of North China, which were evaluated through field investigations,bioassays, and enzyme-linked immunosorbent assays(ELISA).Results: The average number of cotton bollworms never exceeded the action threshold(10 larvae per 100 cotton plants), however, their number reached 19.55 per 100 cotton plants in 2011. The ratios of damaged plants to total Bt cotton stem-tips, buds, and bolls was low except in 2010, when the ratios reached 1.82%, 2.09%, and 10.63%,respectively. The results of bioassay showed that the corrected mortality were higher at the second generation cotton bollworm stage than the third and fourth germination stages. Totally, Bt protein content declined sharply at the seedling stage from 2008 to 2015.Conclusions: This study indicated that almost all Bt cotton varieties were capable to effectively control the populations of cotton bollworm in North China. | Lü Limin LUO Junyu ZHANG Shuai YU Qianlin MA Ligang LIU Xiaofeng WANG Chunyi MA Xiaoyan MA Yan CUI Jinjie | 2018 | Journal of Cotton Research2018，1，1： | 1 |
| 9 | Cranioplasty of large cranial defect at an early stage after decompressed craniectomy performed for severe head trauma显示文摘 | Liang W Xiaofeng Y Weiguo L | 2007 | J Craniofac Surg2007，18，3： | 1 |
| 10 | Cranioplasty of large cranial defect at an early stage after decompressive craniec- tomy performed for severe head trauma显示文摘 | Liang W Xiaofeng Y Weiguo L et a/ | 2007 | J Craniofac Surg2007，18，3： | 1 |
| 11 | Traumatic carotid cavernous fistula accompany ing basilar skull fracture:a study on the incidence of traumatic carotid cavernous fistula in the patients with basilar skull fracture and the prognostic ananlysis abourt traumatic carotid cavernous fistula显示文摘 | Liang W Xiaofeng Y Weiguo L | 2007 | J Trauma2007，63，： | 1 |
| 12 | Cranioplasty of largecranial de- fect at an early stage after decompressive craniectomy performed for se- vere head trauma显示文摘 | Liang W Xiaofeng Y Weiguo L | 2007 | Craniofac Surg2007，18，3： | 1 |
| 13 | Magnetic field abnormality caused by welding residual stress显示文摘 | Iuming L SongLing H Xiaofeng W | 2003 | Journal of Magnetism and Magnetic Materials2003，261，3： | 1 |
| 14 | Matrix IGF-1 maintains bone mass by activation of mTOR in mesenchymal stem cells显示文摘 | Xian L Wu X Pang L Lou M Rosen CJ Qiu T Crane J Frassica F Zhang L Rodriguez JP Xiaofeng J Shoshana Y Shouhong X Argiris E Mei W Xu C | | 0，，： | 1 |
| 15 | Cranioplasty of large cranial defect at an early stage after decompressive craniectomy performed for severe head trauma 显示文摘 | LIANG W XIAOFENG Y WEIGUO L | 2007 | J Craniofac Surg2007，18，3： | 1 |
| 16 | Optimization of delivery of adeno - associated virus mediated gene transfer to a transplanted heart in a rat model显示文摘 | XIAOFENG J BURDORF L HINKEL R | 2009 | Exp Clin Transplant2009，7，3： | 1 |
| 17 | Traumatic carotidcavernous fistula accompanying basilar skull fracture : astudy on the incidence of traumatic carotid cavernous fistulain the patients with basilar skull fracture and the prognosticanalysis about traumatic carotid cavernous fistula 显示文摘 | Liang W Xiaofeng Y Weiguo L et a 1 | 2007 | J Trau-ma2007，63，5： | 1 |
| 18 | Fault-Tolerant Relay Node Placement in Heterogeneous Wireless Sensor Networks显示文摘 | Xiaofeng Han Xiang Cao Lloyd E L | 2010 | IEEE Transactions on Mobile Computing2010，9，5： | 1 |
| 19 | Discovery and structure-activity relationships of pipefidinone and pi- peridine-constrainedp phenethylamines as novel, potent, and selective dipeptidyl peptidase IV inhibitors 显示文摘 | Zhonghua P Xiaofeng L Thomas W | 2007 | Jour- nal of Medicinal Chemistry2007，50，： | 1 |
| 20 | Ore-forming age and tectonic setting of the Linjiasandaogou gold deposit in the Liaodong Peninsula,northeast China:constraints from geochronology and geochemistry显示文摘The Linjiasandaogou gold deposit is located in the Qingchengzi Orefield,North China Craton,China,and has not attracted many studies.We present geochronological,whole-rock geochemical,and Sr–Nd–Hf isotopic data to constrain the age and tectonic setting of the mineralization.U–Pb dating of zircon from pre-and post-ore dikes indicates the Linjiasandaogou Au deposit formed at ca.227–226 Ma.The granite porphyry(ca.227 Ma)and quartz diorite porphyry(ca.228 Ma),which are slightly older than the mineralization,have(;Sr/;Sr)i-=0.7127–0.7162,εNd(t)=–13.7 to–17.0,andεHf(t)=–14.6 to–16.9,and display enrichment in light rare earth elements and large ion lithophile elements and depletion in high field strength elements.Two lamprophyres(226 and225 Ma),which are slightly younger than the mineralization,have higher(;Sr/;Sr)i(0.7165–0.7216),negativeεNd(t)(–11.2 to–14.3)andεHf(t)(–15.6 to–18.6)values,and are enriched in light rare earth elements but depleted in high field strength elements(Nb and Ta).The geochemical characteristics of the granitoid and lamprophyres indicate a lower crustal and enriched mantle source,respectively.We infer that the Linjiasandaogou Au deposit formed in a postcollisional tectonic setting,following the collision between the North China,Yangtze craton,and Central Asian Orogeny in Triassic. | Xiaofeng Yao Tingjie Yan Zhicheng Lü Chenggui Lin Kuifeng Mi Shenghui Li Yang Li Wange Du | 2022 | Acta Geochimica2022，41，2： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员