苏北—鲁东南高压,超高压变质带剥露过程中伸展构造作用

尽管许多地质学家提出了不同的超高压变质岩石形成与折返模式,但高压、超高压变质岩折返与剥露机制仍是大陆造山带动力学研究中的热点和焦点问题。本文明确提出并研究了分布于苏北－胶南变质岩区西北和北部边缘的地壳规模的拆离伸展型韧性剪切带。通过韧性剪切带几何学、运动学、变形环境分析和形成时代的讨论,认为与高压、超高压变质带展布方向斜交的斜向伸展构造作用,是苏北－鲁东南高压、超高压变质带从中地壳抬升至地表的主导     

锦屏一级坝基岩体质量爆破开挖损伤评价

锦屏一级水电站大坝为双曲拱坝,设计坝高305m,拱坝建基岩体以Ⅱ、Ⅲ₁级岩体为主,开挖过程中岩体质量受爆破开挖影响发生程度不等的损伤。为定量评价岩体质量损伤等级,利用开挖爆破检测成果,采用开挖后岩体松弛深度、松弛岩体开挖前后单孔声波衰减率作为岩体质量损伤分级评价的指标,探索一种快速检测、评价岩体质量损伤等级的划分标准,完成坝基开挖后岩体质量损伤的分级分区评价,提出不同损伤等级处理的建议,并评价处理效果。     

基于聚类分析的多波束测深数据滤波方法研究

现有的多波束测深数据滤波方法,在滤波效果和有效信息的保留问题上还不够完善。文中提出对测深数据滤波时,先设定小阈值,尽可能地剔除错误数据,再对滤出数据作聚类分析回收有效信息,防止信息丢失。     

三维激光扫描数据辅助 GBInSAR 相位解缠方法研究

受到周边环境、噪声等因素的影响,GBInSAR影像的干涉相位常出现解缠失真的现象。针对传统解缠算法的不足,利用三维激光扫描数据辅助网络规划解缠算法的方法,对GBInSAR影像数据进行解缠,并结合斜坡实例数据对其进行验证,最终通过评价指标对其解缠结果进行定量分析。结果表明,三维激光扫描数据辅助网络规划解缠算法可以降低不连续点数目和ε值,较好地提高GBInSAR的解缠精度,为GBInSAR的推广应用提供参考。     

土壤重金属污染风险时空变化模拟与分析

针对稀疏采样无法准确揭示土壤重金属污染时空分布及其健康危害的问题,该文集成协同克里格插值和情景预测模型模拟绘制了2005、2020年我国南方某地土壤表层重金属砷、镉含量的时空分布格局,基于污染场地风险评估导则模拟分析了无突变与乐观情景致癌风险动态变化。结果表明:耦合地理要素的协同克里格插值和情景预测可以客观反映研究区土壤重金属砷、镉含量的时空分布特征与变化趋势;研究区土壤重金属污染对人体存在致癌风险,但风险范围与水平在2020年乐观情景下均会降低。     

基于STPIR与EWL组合的北斗三频周跳探测与修复

根据电离层残差法在周跳探测与修复中的应用原理,提出了历元间相位电离层残差二次差分的方法,解决了采样间隔较大时,周跳探测与修复的精度受电离层延迟误差制约的问题,提高了周跳探测的精度;在进行周跳修复时,利用超宽巷组合代替B2和B3组合,解决了无法修复不敏感周跳的问题。结果表明,对于采样间隔较大、历元间电离层状态不稳的观测值,该组合方法有效地探测出不足1周的周跳值,并能够有效地修复任意周跳组合。     

河南省嵩县万村金矿矿床成因及找矿远景

万村金矿床产于华北陆块南缘熊耳山金矿化集中区,花山花岗岩体的南部边缘。通过综合分析、研究矿区探(矿)采(矿)及前人资料,本区金矿具有造山带型金矿的特征。金矿形成于岩体侵入之后,矿体在构造形成过程中由含矿热液充填形成,太华群仍是本区金矿的主要矿源层,花山花岗岩体在成矿过程中提供了重要的成矿物质。矿体主要分布在含矿蚀变带中下部和底部,根据区内化探资料分析,矿体中深部存在第二矿化富集段,显示该区中深部具有较大的找矿潜力。     

Immunogenicity and protective role of antigenic regions from five outer membrane proteins of <Emphasis Type="Italic">Flavobacterium columnare</Emphasis> in grass carp <Emphasis Type="Italic">Ctenopharyngodon idella</Emphasis>

Flavobacterium columnare causes columnaris disease in freshwater fish. In the present study, the antigenic regions of five outer membrane proteins (OMPs), including zinc metalloprotease, prolyl oligopeptidase, thermolysin, collagenase and chondroitin AC lyase, were bioinformatically analyzed, fused together, and then expressed as a recombinant fusion protein in Escherichia coli. The expressed protein of 95.6 kDa, as estimated by 10% sodium dodecyl sulfate-polyacrylamide gel electrophoresis, was consistent with the molecular weight deduced from the amino acid sequence. The purified recombinant protein was used to vaccinate the grass carp, Ctenopharyngodon idella. Following vaccination of the fish their IgM antibody levels were examined, as was the expression of IgM, IgD and IgZ immunoglobulin genes and other genes such as MHC Iα and MHC IIβ, which are also involved in adaptive immunity. Interleukin genes (IL), including IL-1β, IL-8 and IL-10, and type I and type II interferon (IFN) genes were also examined. At 3 and 4 weeks post-vaccination (wpv), significant increases in IgM antibody levels were observed in the fish vaccinated with the recombinant fusion protein, and an increase in the expression levels of IgM, IgD and IgZ genes was also detected following the vaccinations, thus indicating that an adaptive immune response was induced by the vaccinations. Early increases in the expression levels of IL and IFN genes were also observed in the vaccinated fish. At four wpv, the fish were challenged with F. columnare, and the vaccinated fish showed a good level of protection against this pathogen, with 39% relative percent survival (RPS) compared with the control group. It can be concluded, therefore, that the five OMPs, in the form of a recombinant fusion protein vaccine, induced an immune response in fish and protection against F. columnare.     

有关煌斑岩与金矿化新成因模式的讨论

对产在不同地区、具不同岩性、且与不同金属矿化有关的煌斑岩金含量分析表明,煌斑岩原始的金含量一般都不高;Ｒｏｃｋ等人提出的高金含量是煌斑岩的固有特征及有关煌斑岩与金矿化新成因模式的立论依据尚欠充分。     

金伯利岩中石榴石辉石岩捕虏体的特征及其成因意义

在辽宁复县金伯利岩中发现了石榴石辉石岩的深源捕虏体,它是来自软流层的熔／流体在１００～１２０ｋｍ结晶的产物,其中的石榴石及磷灰石富含流体包裹体,有可能代表了地幔中富流体活动的幔内薄弱带的样品,如果该带普遍发育,则可能是中新生代中国东部活化阶段岩石圈地幔的一个拆沉界面。