共搜索到8685条信息,每页显示10条信息,共869页。用时:0小时0分0秒618毫秒
吉林省安图县东方红金矿床断裂构造特征与找矿田莉玉1,臧兴运2,赵成2(1.吉林省长春市吉林大学测试科学实验研究中心2.吉林省地质调查院)摘 要:东方红金矿区断裂构造发育,并为主要控矿地质条件.北东向断裂构造为压扭性,沿断裂构造发育的蚀变带以硅化,绿泥石化,碳酸盐化等矿物组合为主,构造原生晕富Au,贫Cu,Pb,Zn,并控制土壤测量Au元素异常浓集中心的分布;北西西向断裂构造为张扭性,沿断裂构造发育的蚀变带以黄铁矿化,方铅矿化,高岭土化等矿物组合为主,构造原生晕贫Au,富Cu,Pb,Zn,并控制土壤测量Cu,Pb......
西秦岭李子园碎石子斑岩型金矿床地质特征及成矿时代刘云华1,刘怀礼2,黄绍峰3,高洪兴2,张永强3,李志国1,郑绪忠-2(1.陕西省西安市长安大学地球科学与资源学院2.甘肃天水李子金矿有限公司3.中国黄金集团公司)摘 要:西秦岭李子园碎石子金矿床受闪长玢岩脉和断裂破碎带的双重控制,矿体上部主要产于闪长玢岩脉附近的断裂破碎带中,矿体下部产于闪长玢岩脉内部;矿石中金属矿物主要为黄铁矿,黄铜矿,方铅矿;黄铁矿为主要的金,银的载体矿物,矿石以细脉-浸染状,细脉-网脉状构造为主,具有斑岩型矿床的蚀变类型特点.矿区与成矿有关......
和B区. 图1 乘员舱及玻璃分区示意图 Fig. 1 Schematic diagram of the passenger compartment and glass partition 除霜系统内气流流动复杂,因此,对除霜系统内网格进行加密处理;对空气域采用网格质量好,求解稳定性好的六面体网格,玻璃域采用四棱柱网格进行离散;近壁面采用3层四棱柱网格,总厚度为3 mm,网格厚度增长率为1.2.求解域中截面网格划分如图2所示.网格单元数约为629万个,玻璃厚度为4 mm. 图2 求解域中截面网格划分 Fig. 2 Meshing of the section in the solution ......
DOI: 10.11817/j.issn.1672-7207.2020.09.031 (1) 式中:Tx和Ty分别为纵,横向蠕滑力;γx和γy分别为纵,横向蠕滑率.本文所涉动车组的车轮材料为ER8钢,其损伤函数中关键参数取值见图10[8].需说明的是,只有当作用在车轮上的纵向蠕滑力方向与列车运行方向相反时才计算疲劳损伤,这主要是将轮轨接触载荷作用下裂纹闭合效应和液体润滑作用对滚动接触疲劳裂纹扩展的影响考虑在内[15-16]. 图10 损伤函数模型 Fig. 10 Damage function model 3 仿真结果 模拟车辆通过左曲线,各曲线设置参数见表3,选取圆曲线上10 ......
production of B. subtilis strain BS501a; especially, MgSO4 contributes a highly significant effect. The average diameter of inhibition zone of the BS501a filtered fermentation supernatant (FFS) cultured... against M. grisea. 2.3 Assay of antagonistic activity Antagonistic activity was determined by well diffusion assays. A spore suspension (100 μL) of M. gresea (approximately 109 cfu/mL) was spread onto......
time, a larger proportion of smooth zone on the cross section has been achieved. Key words: AZ31 magnesium alloy; cryogenic treatment; mechanical properties; punch shearing Cite this article as: HU Zhi... precipitating from dislocations and other defects, furthermore, the atom diffusion rate is slow and the secondary phase cannot continue to grow under low temperature conditions, thus the secondary phase......
the conventional diffusion processes [27-29]. The characteristic morphology and fine-grained microstructure of borides located in Ni-based matrix in the re-melted zone were the reasons for diminished...-melted zone depended on the paste composition and caused an increase in hardness up to about HV 1000. The wear resistance was evaluated by calculation of mass wear intensity factor Imw and relative......
that the silicide coating is formed by reactive diffusion and the silicification process obeys parabolic relation. The coating is composed of composite structures including MoSi2 outer layer, two-phase transient zone with major NbSi2 and minor Nb5Si3, and Nb5Si3 diffusion inner layer. The coating possesses good high-temperature oxidation resistance and spalling resistance. At high temperature and under......
structural fracture zone and ground fissures in this area, which would be the disadvantageous factors for the construction of the high-rise buildings, the foundation evaluation with controlled source...空层.图9中,D1~D8为钻孔位置. 图9 场区评价分区图 Fig.9 Evaluation zone of working area 由于场区位于市中心繁华地带,工业干扰对勘探结果的影响较大,尽管采用了多种方法去噪和消除非均匀地表的影响,但受勘探方法的限制,对个别异常的判断可能存在误差.然而,由于有多条测线控制,结果可以相互佐证,相互比较,可以反映异常体的效果并......
from the matrix, meanwhile micro-hardness and conductivity of alloy increase obviously. After being homogenizated at 490 ℃ for 1 000 h, a wide precipitate-free zone (PFZ) forms near GB. Key words: 2E12... A. Modeling of precipitate-free zone formed upon homogenization in a multi-component alloy[J]. Acta Materialia, 2007, 55(7): 2539-2553. [11] 杜凤山, 邓少奎, 闫亮, 等. 2E12铝合金过烧温度及高温塑性研究[J]. 材料工程, 2008, 7......