共查询到20条相似文献,搜索用时 593 毫秒
1.
Statusreportonthetunablemonochromaticgamma-raysourceM.Bertschy;J.Jolie(PhysicsDepartment,UniversityofFribourp,Perolles,CH-170... 相似文献
2.
王光裕 《核技术(英文版)》1996,(1)
TheoreticalstudyoninteractionofneonlikeGeX-raylasersingainsaturationWangGuang-Yu(王光裕)(InstituteofAppliedPhysicsandComputation... 相似文献
3.
Effectofsteamqualityontwo-phaseflowinanaturalcirculationloopJiaHai-Jun(贾海军);WuShao-Rong(吴少融);WangNing(王宁)andYaoSi-Min(姚思民)(In... 相似文献
4.
Effectsofradiation-inducedoxideandinterfacechargesonmobilitydegradationin MOSFETsRenDi-Yuan(任迪远);YuXue-Feng(余学锋);LuWu(陆妩);Gao... 相似文献
5.
Inhibitoryeffectoflowdoseirradiationontumormetastasesin tumorbearinginmiceWeiDao-Yan(魏道严);JinAo-Xing(金敖兴);HuangGuo(黄帼);WangSi... 相似文献
6.
Synthesis,labelingandanimalexperimentsofthederivativeofphenylpentadecanoicacid(CACPPA)WuChunYing,JiShuRen,FangPing,ZhouXia... 相似文献
7.
CalculationofresponseofChinesehamstercelstoionsbasedontrackstructuretheoryLiuXiaoWei,ZhangChunXiang(DepartmentofPhysics,Zh... 相似文献
8.
1IntroductionManyrecentforeignanddomesticreportsshowedthehumanserumpepsinogen(PG)levelswerevaluableinthediagnosisofgastricdis... 相似文献
9.
BiologicaleffectsofsynchrotronradiationoncropsTangZhang-Xiong(唐掌雄);ShiJin-Guo(施巾帼);HuJiang-Chao(胡江朝)(InstitutefortheApplicati... 相似文献
10.
Liu Chang Shi 《核技术(英文版)》1997,(4)
MeasurementofmeanexcitationenergybyenergylosLiuChangShi(BasicsDepartment,XinjiangPetroleumColege,Urumqi830000)AbstractThemea... 相似文献
11.
尖晶石-石榴石相转变过程中矿物的微量元素组成与分布特征 总被引:1,自引:0,他引:1
利用质子微探针和微束PIXE定量分析技术对山东梭罗树地慢橄榄岩中橄榄石、斜方辉石、单斜辉石、尖晶石和石榴石等矿物的微量元素组成与分布进行了研究。结果表明,不相容元素(Sr、Y、Zr)主要富集于单斜辉石内,尖晶石则几乎富集质子探针所能检出的所有微量元素,而石榴石中微量元素含量最少。该研究表明,在矿物微区微量元素分布是十分不均匀的,推测可能受地幔交代过程中溶液的渗滤效应以及存在微粒包裹体的共同制约。 相似文献
12.
Mantle metasomatism for metaperidotite from Shuanggou ophiolite of Yunnan Province by proton microprobe 总被引:1,自引:0,他引:1
This study shows that olivine,serpentine and orthopyroxene are enriched with compatible element Ni;clinopyroxene with Ni and Y;spinel strongly with Ni,Zn,Ga,Ge,As and Zr;chlorite with Ni,Zn,Sr and Zr,However,grossulatrite is poor in all of these trace elements,except Sr.The trace element composition and distribution in the minearls are heterogeneous.The distributions of trace elements in the minerals further demonstrate that they result from mantle metasomatism under open system. 相似文献
13.
YUFu-Sheng HANSong HUANGYu-Ying HEWei CAOJie WANGHong-Yue 《核技术(英文版)》2005,16(2):108-113
Basaltic samples from different locations in Aershan area determined by instrumental neutron activation analysis (INAA) have the same distribution patterns of REE and trace elements. The similar REE contents of the same minerals without inclusions from different xenolith suggest that the mantle source region under different active volcanoes have the same composition. The REE content differences between the same minerals with and without melt inclusions selected from the same mantle xenolith indicate that the melt inclusions are rich in REE. The same patterns of trace elements of inclusions and host minerals from different xenolith analyzed by SRXRF suggest that the mantle fluid has no notable heterogeneity in Aershan area. 相似文献
14.
Synchrotron radiation X-ray fluorescence (SRXRF) microprobe was used to ananlyse altered mineral muscovite and its surrounding feldspar in Yuerya gold deposit. The major, minor and trace elements of the two minerals were detected and analyzed. SRXRF analysis showed that the Yuerya muscovite had a complex chemical composition. containing K, Fe, Ca, Ti, Cr, Mn, Co, Cu, Zn and many trace or ultra-trace elements. Since muscovite resulted from the alteration of hydrothermal ore fluid acting on feldspar (plagioclase), the difference of chemical composition between the two minerals shows the components of ore fluid, which are characterized by the enrichment of alkaline and alkaline-earth metal elements K, Ca and ore-associated elements Fe, Cu, Zn. And gold. silver and platinum, invisible under microscope, were detected in some areas of muscovite but not found in feldspar. Especially platinum, a mantle material is rarely seen in the earth crust but now found in the gold deposit of magmatic sources; its appearance approves the idea of mantle flux participating in the gold mineralization, which suggests that the tectonic event controlling gold mineralization in the Yuerya district is a mantle phenomenon. 相似文献
15.
Cenozoic basalts in the eastern part of Liaoning-Jilin contain abundant mantle-derived inclusions. The rock types of the ultramafic inclusions are composed mostly of spinel lherzolite and a few websterites. In order to study the origin of inclusions, the concnetrations of several trace elements have been measured in samples by NAA. According to geochemical characteristics of trace elements, there are two types of spinel Iherzolite inclusions. The first type is refractory residues left after partial melting of the upper mantle and the second type is metasomatizing refractory residues. The websterites inclusions formed by segregation of basaltic melt derived from high degree of melting of mantle source rocks. 相似文献
16.
辽宁-吉林东部地区超镁铁质岩包体的微量元素地球化学特征 总被引:1,自引:0,他引:1
发展了预浓集中子活化分析方法,结合仪器中子活化分析对辽宁—吉林东部地区新生代火山岩中尖晶石二辉橄榄岩包体的稀土元素(REE)及其他微量元素进行了测定。它们的过渡金属元素中不相容元素Ti以及适度相容元素V和Sc相对于原始地慢(PM)均具亏损的特征;而相容元素Co、Ni和Cr含量略高或类似于PM,反映了它们应为经历了部分熔融后的残余地幔。依据REE特征尖晶石二辉橄榄岩可分为两类:第一类包体的REE含量和REE分配型式与PM相比呈现明显的亏损,提供了它们是残余地慢岩的又一证据。第二类包体的重稀土元素(HREE)比前者低,但轻稀土元素(LREE)比前者明显的高,揭示了它们在地幔源岩经历了部分熔融,使REE发生了亏损之后又遭受了LREE富集,即地幔交代作用。 相似文献
17.
克洛斯湖地区花岗伟晶岩脉中磷灰石的PIXE分析 总被引:1,自引:0,他引:1
应用质子激发X 射线(PIXE)方法分析克洛斯湖地区花岗伟晶岩中的31个磷灰石样品。讨论在伟晶岩系统中稀土元素和其它痕量元素的行为以及磷灰石中元素浓度分布与地理位置的关系。围岩钾长石中钾铷的比值c_k/c_(Rb)一般被认为是“世代”和结晶分异总体水平的指示。因此磷灰石中元素浓度对于钾长石中钾铷比值的相关图可以给出磷灰石中元素在“交代”过程中的“世代”差异。 相似文献
18.
S. Murao S. H. Sie X. Hu Gary F. Suter 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》1999,150(1-4):502-509
The Xuefeng uplifted belt and the neighboring Xikuangshan region of southern China is the largest antimony producing area in the world. The mineralizing solution which was responsible for the antimony deposition is considered to be derived mainly from deep crustal fluids during a large tectonic movement of the Jurassic time. We analyzed trace elements of ore minerals and fluid inclusions from this area by CSIRO’s micro-PIXE to understand characteristics of the mineralizing solution. We selected three representative “super-large” deposits, one in the Xikuangshan area and the others within the Xuefeng belt: (1) Xikuangshan (simple Sb) which is structurally controlled by large-scale transcrustal faults and fractures, and mainly hosted by limestone; (2) Wuxi (Sb–Au–W), embedded in slate and structurally controlled by large-scale faults and fractures; and (3) Banxi (simple Sb) which is hosted by slate and controlled by local fractures. Our preliminary result indicated that the trace element distribution is highly contrasting for these three deposits corresponding to each geologic setting. Our case study showed that being combined with field evidence, micro-PIXE can contribute to understand large tectonic movements and to establish an effective exploration model for super-large mineral deposits. 相似文献
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