共搜索到29480条信息,每页显示10条信息,共2948页。用时:0小时0分0秒426毫秒
黑龙江省逊克县高松山金矿区岩石地球化学特征尹西君1,连永牢1,潘超1(1.黑龙江省牡丹江市人民武装警察部队黄金第一支队)摘 要:通过对高松山金矿床特征,地球化学特征的分析研究,认为高松山金矿床为浅成低温热液型金矿床,成矿地层是甘河期火山岩,以亚碱性系列之钙碱性高钾火山岩为特征.火山岩稀土元素分析结果表明,该火山岩属轻稀土富集型,铕无明显异常,稀土配分曲线为平缓的右倾.岩石微量元素曲线形态基本相似,表明岩浆具有同源特点.火山岩成因类型为壳-壳幔活动大陆边缘的产物.岩浆演化以分异作用为主,并受一定陆壳混染.
with a large component of K-rich granites from intracrustal melting [16]. There are relatively few papers with comprehensive major and trace element data for shales in lower Silurian series shales...%).The average CaO (2.24%) and Na2O (0.88%) contents in USLS are lower than those in the LSLS (CaO, 2.43%; Na2O, 1.06%). Table 1 Major element concentrations for shales of Longmaxi Formation 4.2 Trace......
are from Ref. [6]) 表2 浸铜湖铜钼矿中罗卜岭花岗闪长斑岩与花岗斑岩的微量元素成分(质量分数,10-6) Table 2 Trace element concentrations of Luoboling granodiorite porphyries and Jintonghu granites, Fujian province, SE China...及其地质意义[J]. 中国有色金属学报, 2015, 25(3): 776-785. LIU Qing-quan, ZHANG Yu, ZHANG Zhi-hui, LI Bing, ZHANG Chi. Ziron trace element characteristics and its implication of monzogranite in Yaochong Mo deposit......
) is enhanced from 5.0 MPa·m1/2 to 12.6 MPa·m1/2 and exfoliation corrosion from EC to EB-. Key words: Al-Zn-Mg-Cu alloys; trace element; grain refinement; microstructure; corrosion 高性能铝合金是航空航天等武器平台的主要结构材料,并正向地面和..., Zr, Ti and B on grain refinement of as-cast Al-Zn-Mg-Cu alloys[J]. Rare Metal Materials and Engineering, 2010, 39(7): 1135-1140. [31] GAO Tong, ZHANG Yongrui, LIU Xiangfa. Influence of trace Ti......
......
metal; trace impurities; element concentration distribution; glow-discharge mass spectrometry; [全文内容正在添加中] ......
金矿床不同阶段黄铁矿微量元素含量 Table 2 Trace element abundances on different stages pyrites in Longtoushan gold deposit 据表2中数据作出矿区不同成矿阶段Zr/Hf,Nb/Ta图(见图6),矿区与成矿关系密切的(角砾状)流纹斑岩及不同成矿阶段的Y/Ho值变化图[30](见图7).由图6和7可见... and trace element component of auriferous pyrite[J]. Acta Petrologica Sinica, 2014, 30(9): 2518-2532. [20] SHANNON R D. Revised effective ionic radii systematic studies of interatomic distances in halides......
granite and granite porphyry are exposed. Systematic geological survey and trace element analysis were used to identify the geological features and genetic type of the deposit. The results show...矿区及区域岩石微量元素含量 Table 2 Trace element contents of rock in Angou and regional area 表3 矿质元素Pearson(皮尔逊)相关系数 Table 3 Pearson correlation coefficients of mineral elements 3.4 矿床分带与......
高分辨电感耦合等离子体质谱法测定电池锌粉中杂质元素周学忠1,聂西度2,谢华林1(1.湖南省衡阳市湖南工学院化学化工系2.中南大学化学化工学院,湖南长沙 410083)摘 要:应用高分辨电感耦合等离子体质谱法(HR-ICP-MS)测定电池锌粉中Mg,Mn,Fe,Co,Ni,Cu,As,Mo,Cd,Sb,Pb,Bi 12种痕量元素.考察了试样消解时引入的氯离子,试样中基体锌和共存元素对被测元素的影响及其消除方法.结果表明,高浓度氯离子对Bi,Cd,Mn,Mg,Fe的信号产生抑制作用,但其浓度小于5%时影响较小,因此......
Elasto-plastic finite element analysis of squaring circular tube HUANG Yuung-ming(黄永明) Department of Mechanical and Computer-Aided Engineering, St. John’s University, Taipei 25135, China...; Abstract: The flow rule of Prandtl-Reuss was adopted and incremental elasto-plastic finite-element analysis formulation of Coulomb’s friction law combining the finite......