震前自然电场的前兆及其可能机理

研究了震前自然电场的前兆及礤可能机理。主要结论：（１）５．４￣６．２级地震在１５０￣２００ｋｍ,７．０￣７．９级地震在２５０ｋｍ范围内自然电场出现前兆;（２）过滤电场、电化学电场、土体受压变密和机电转换可能是自然电场的前兆机理。     

碱性玄武岩中幔源岩石包体内尖晶石成分特征及其岩石学成因意义

通过对我国东部北起黑龙江省南至海南省３１个产地的新生代碱性玄武岩中橄榄岩类 （纯橄岩、方辉橄榄岩及二辉橄榄岩） 包体和辉石岩类包体中的１６０ 多个尖晶石电子探针分析数据, 论述了尖晶石的Ｃｒ－Ａｌ, Ｆｅ－Ｍｇ, Ｎｉ－Ｍｇ 主元素及有关比值和端员组分之间的关系, 分析研究了不同岩类包体中尖晶石的颜色、成分及成因之间的联系。并利用所分析的有关橄榄石、斜方辉石、单斜辉石共生矿物的电子探针分析数据, 采用新的、较合理的Ｂｒｅｙ－Ｋｏｈｌｅｒ温度计及Ｋｏｈｌｅｒ－Ｂｒｅｙ 压力计和Ｂａｌｌｈａｕｓ ｅｔａｌ． 氧逸度计算方法进行了计算, 探讨了尖晶石成分与其形成温度、压力和氧逸度状态的关系, 指出了尖晶石成分所反映的地幔亏损程度及部分熔融程度的变化规律及尖晶石 （相） 稳定的温度、压力和氧逸度范围。     

一种自动绘制聚类分析谱系图的新算法

聚类分析是最常用的多元统计方法之一,其结果常用谱系图来表示,用计算机自动绘制谱系图时,过去常用的做法比较繁杂、新算法先将结果数据进行排序,再使用二叉树的方法,不算法直观,且速度加快。     

秦岭煎茶岭金矿床含金富砷黄铁矿增生环带研究

在秦岭剪茶岭金矿床中发现了含金富砷黄铁矿增生环带。其产状,结构构造和成分特征共同显示了,金成矿主期金与砷有密切的地球化学相关性,在富砷增生环带发育时,金与砷共沉淀并可能在其中发育了不可见金。这种环带包含有重要的成矿作用信息,至少在矿区范围内可用于判别是否有主期矿化发育。     

N—间甲苯基—N‘—（对氨基苯磺酸钠）硫脲与铜的显色反应及应用

研究了新试剂N-间甲苯基-N'-(对氨基苯磺酸钠)硫脲(MMPT)与Cu2+的显色反应.结果表明,在pH 4.6～5.6的HAc-NaAc介质中,Cu2+与MMPT形成的配合物至少稳定5 h,其λmax=370 nm,表观摩尔吸光系数为1.12×105 L.mol-1.cm-1.Cu2+的质量浓度在0.08～1.4 mg/L时符合比尔定律,相关系数r=0.9991.方法简便、快速,用于铅矿中铜的分析,测定结果与监控样推荐值相符,对w(Cu)=0.8%的试样测定6次,RSD=3.2%.     

关于台风风场研究进展的若干问题探讨

台风是对我国造成严重危害的中尺度天气系统,随着沿海地区经济的发展以及越来越多的海洋开发工程的进行,对台风的研究也日益受到重视。本文从台风的观测、理论和数值研究几个方面综合分析了台风研究中的若干问题,并对现阶段存在的问题进行了讨论。     

海洋生态系统动力学研究的相关网上资源

分４部分介绍互联网上与海洋生态系统动力学研究有关的信息资源、主要网址及其主要内容：（１）海洋生态系统模拟研究;（２）海洋科学研究组织和国际研究计划;（３）网上新闻讨论组;（４）海洋生态杂志。     

易县地震台四分量钻孔应变观测震前异常特征

通过对河北易县地震台钻孔应变资料进行处理,发现在2014年9月6日涿鹿4.3级和2015年9月14日昌黎4.2级地震前,该台四分量钻孔应变观测到显著前兆异常变化,与2012年5月28日唐山4.8级地震前出现的异常相似度较高,异常形态均表现为"来快去慢",均在极值附近维持数日后,逐渐恢复原值过程中发生地震。     

Identification and assessment of water safety risk for groundwater recharge with reclaimed water in China

Groundwater recharge using reclaimed water has developed rapidly around the world to relieve the groundwater resource shortage and declining of the water table. Traditional water treatment systems are inefficient to remove all the types of contaminants, so it is urgent to identify the priority chemical substances (CSs) that deserve our first concern. In this study, we developed a method (EER method) to identify priority CSs in groundwater recharge by surface spreading and direct aquifer injection. Three stages were processed which were exposure assessment, effect assessment and ranking for identification of priority CSs. Fourteen cities in China were selected for data collected and 90 pollutants in reclaimed water samples were analyzed as the target pollutants for a case study. According to three stages, the 90 CSs studied were divided into five groups (primary control CSs and high, moderate and low and no risk control CSs). In the primary control CSs and high, moderate and low and no risk control CSs group there were 14, 18, 21, 21 and 16 CSs, respectively when groundwater recharged by surface spreading, while there were 15, 18, 21, 21 and 15 CSs when recharged by direct injection. This method provided an indicator of prioritizing the risk of 90 compounds in the reclaimed water for groundwater recharge.     

Distribution,potential sources and ecological risks of two persistent organic pollutants in the intertidal sediment at the Shuangtaizi Estuary,Bohai Sea of China

Spatial distribution, source apportionment, and potential ecological risks of sixteen polycyclic aromatic hydrocarbons (PAHs) and seven endocrine disrupting compounds (EDCs) in the intertidal sediment at the Shuangtaizi Estuary, Bohai Sea of China were analyzed. Results showed that the total PAH concentrations ranged from 28.79 ng g^? 1 dw to 281.97 ng g^? 1 dw (mean: 115.92 ng g^? 1 dw) and the total EDC concentrations from 0.52 ng g^? 1 dw to 126.73 ng g^? 1 dw (mean: 37.49 ng g^? 1 dw). The distribution pattern for the PAHs was generally different from that of the EDCs possibly due to their distinct sources and n-octanol-/water partition coefficients (K_OW). Qualitative and quantitative analytical results showed that PAH sources were mainly from a mixture of pyrogenic and petrogenic contributions. The higher levels at the southeast of Geligang indicated that the EDC pollutants may have mainly originated from the plastic industry and other chemical plants located along the Liao River. Ecological risk assessment revealed that PAHs exhibited low ecotoxicological effects, whereas EDCs, especially 4-tert-octylphenol and bisphenol A, had high ecological hazard to the estuarine biota.