堡子湾金矿同位素及稀土元素地球化学研究

通过对堡子湾金矿矿石、海西期二长花岗 (斑 )岩 -石英二长 (斑 )岩及燕山期花岗班岩的硫、氢、氧、铅同位素及稀土元素地球化学的研究后认为 ,二长花岗 (斑 )岩 -石英二长 (斑 )岩为堡子湾金矿的成矿母岩。     

威远震旦系天然气与油气生运聚

根据威远震旦系气藏天然气组成、同位素特征、储层包裹体的对比研究 ,我们认为该气藏的天然气主要来源于下寒武统筇竹寺组泥岩 ,其天然气主要是干酪根裂解气 ,次为油的裂解气。威远震旦系气藏是喜山期形成的 ,威远的天然气无论是干酪根裂解气还是油裂解气都由北面古构造聚集的干酪根裂解气和油裂解气转移而来 ,威远构造之所以能形成工业聚集的重要原因就是威远构造的形成与北面古构造的消失的良好匹配关系     

Kinetics of hydrogen peroxide-sulfur (IV) reaction in atmospheric precipitation

The kinetics of the reaction of dissolved S(IV) with H2O2 was studied on 59 precipitation samples collected in Southwestern China, during the period of June 1988 to October 1989, from which the oxidation rates of the reaction were measured. The extent of reaction was followed by continuous amperometric measurement of the concentrations of the reagents. The two systems (i. e. rainwater and purified water) have been studied with the same methodology under identical reaction conditions (e. g. reagent concentrations, ionic strength and temperature). The kinetics was studied in no buffer solutions. The effect of formaldehyde on the reaction has also been studied, including kinetic studies in laboratory and model calculations, and it is indicated that formaldehyde with typical atmospheric concentration exerts no influence on the reaction of dissolved S(IV) with H2O2. In addition, the activation energy of the reaction was also measured in purified water as reaction medium for temperature range 0-50℃ at pH 4.0     

Time series analysis of elemental and isotopic data from biomineralized whale tissue

A temporal record of environmental conditions is often contained within accretionary biological tissue. These records can provide knowledge of the environmental conditions that existed at the time the tissue was formed. In this study, we look at trace element concentrations and isotopic ratios of carbon and nitrogen as contained in baleen from bowhead whales in the eastern and western Arctic Ocean. Time series techniques, including maximum likelihood method and likelihood ratio tests, are applied to analysis of data and inference about their mean structures.     

下喷射自吸吸收在氯化生产废气处理工艺中的应用

介绍了喷射自吸吸收在氯化生产废气处理中的应用。采用喷射泵代替引风机 ,与降膜吸收器串联 ,克服了淹塔、负压低的弊端 ,提高了氯化氢吸收率 ;回收次品盐酸浓度达 31%。     

Pathway of the ozonation of 2,4,6-trichlorophenol in aqueous solution

The reaction mechanism and pathway of the ozonation of 2,4,6-trichlorophenol (2,4,6-TCP) in aqueous solution were investigated. The removal efficiency and the variation of H₂O₂, Cl⁻ formic acid, and oxalic acid were studied during the semi-batch ozonation experiments (continuous for ozone gas supply, fixed volume of water sample). The results showed that when there was no scavenger, the removal efficiency of 0.1 mmol/L 2,4,6-TCP could reach 99% within 6 min by adding 24 mg/L ozone. The reaction of molecular ozone with 2,4,6-TCP resulted in the formation of H₂O₂. The maximal concentration of H₂O₂ detected during the ozonation could reach 22.5% of the original concentration of 2,4,6-TCP. The reaction of ozone with H₂O₂ resulted in the generation of a lot of OH• radicals. Therefore, 2,4,6-TCP was degraded to formic acid and oxalic acid by ozone and OH• radicals together. With the inhibition of OH• radicals, ozone molecule firstly degraded 2,4,6-TCP to form chlorinated quinone, which was subsequently oxidized to formic acid and oxalic acid. Two reaction pathways of the degradation of 2,4,6-TCP by ozone and O₃/OH• were proposed in this study. Translated from Acta Scientiae Circumstantiae, 2005, 25(12): 1619–1623 [译自: 环境科学学报]     

Tertiary metallogenesis in the Eastern Alps: the Waldenstein hematite deposit (Austria)

The specularite deposit at Waldenstein is an epigenetic replacement/vein-type hematite mineralization with distinct alteration zones. It is situated in highly metamorphosed schists and, gneisses of the Koralm Crystalline Complex. Sericitization and chloritization are strictly bound to this alteration and occur within a few meters of the hematite veins. Radiometric dating of the sericitization and the implicity of the mineralization yield a Middle Eocene age. Petrographic evidence proves an early, relatively reduced paragenesis (magnetite, ilmenite) being partly replaced by hematite and chlorite during the main phase of ore formation. Fluid inclusion and stable isotope investigations indicate that formation temperatures were approximately 300°C during the main stage and decreased to 200°C in the latest stage of the hydrothermal event. The H-isotope compositions of chlorites and of fluid inclusions in quartz indicate the influence of seawater. This also explains the high salinities determined by fluid inclusion studies (20–30% NaCl equiv.). According to the genetic model presented in this paper the hydrothermal activity started when the deformation accompanying the uplift of the Koralm Crystalline Complex passed from a ductile to brittle regime (Middle Eocene). The brittle faults acted as channelways for rising, deep fluids, probably of metamorphic origin. Temperature differences between the different uplifting crustal segments supported fluid circulation. Precipitation of the ore occurred at shallow crustal levels where the hydraulic regime was dominated by seawater, and oxidation of the original reducing fluids took place.     

降雨氢离子浓度的参数化研究

对酸雨模式中降雨的物理过程进行了简化假设，在此基础上研究了大气中影响降雨氢离子浓度的几种主要污染物（ＳＯ２ ，ＶＯＣｓ ，ＮＨ３ ，ＮＯｘ） 及温度、天顶角、雨强等因素同降雨氢离子浓度的参数关系     

聚四氟乙烯生产中副产氯化氢及盐酸处理的安全技术措施

简要介绍聚四氟乙烯生产中副产氯化氢及盐酸的处理方法.根据氯化氢和盐酸的特性,设计了相应的安全技术措施,以保证安全生产.     

萤石Sr、Nd同位素地球化学研究评述

本文通过大量实例综述了近年萤石Sr、Nd同位素在定年和示踪方面取得的进展 ,结果表明 :萤石Sm-Nd同位素可以用于测定成矿作用的时代 ,但由于萤石Nd同位素初始值存在不均一性和受次生干扰的影响 ,所获数据最好用其它测年方法获得的数据加以验证 ;萤石Sr、Nd同位素组成是示踪成矿流体来源的有效方法 ,利用Sr、Nd同位素组成还可定量估算出形成成矿流体不同端元所占的比例。