压气沉箱工法的几种现代技术及其应用

随着科学技术的不断进步，日本的压气沉箱技术已经实现了在施工方面的机械化、无人化、自动化、大深度化。现代压气沉箱技术巳非常广泛地应用于桥梁基础、隧道基坑、地下工程等建设施工领域。本文简要地介绍该工法在日本的一些现代技术及其应用状况。     

井中化探技术在识别烃源岩中的应用

井中化探逐渐成为鉴别油气属性、识别烃源岩特征的重要技术方法。本文以井中化探多指标、多参数方法，对我国东部某盆地探井中的烃源岩进行识别，为油气勘探中选择目的层和储量评估提供了地球化学依据。     

澜沧江断裂中段雪山河变质岩群的岩石学特征及地质意义

澜沧江断裂中段（永平－云龙）出露一条变质岩带，矿物成分主要为石英、黑云母和白云母。岩石化学成分表明该变质岩属于铝硅酸盐类，元素地球化学特征表明，该变质岩系的原岩主要为沉积岩，但可能有火山凝灰物质加入，从而表明该变质岩带的南北两端出露的火山岩带在该区段内是不连续的。因此，在该区开展找矿时重点应注意与沉积变质作用有关的类型矿床。     

Early Yanshanian post-orogenic granitoids in the Nanling region-- Petrological constraints and geodynamic settings

Early Yanshanian magmatic suites predominate absolutely in the Nanling granite belt.They consist mainly of monzogranite and K-feldspar granite.There occur associations of early Yanshanian A-type granitoids(176 Ma-178 Ma) and bimodal volcanic rocks(158 Ma-179 Ma) in southern Jiangxi and southwestern Fujian in the eastern sector of the granite belt and early Yanshanian basalts(177 Ma-178 Ma) in southern Hunan in the central sector of the belt.Both the acid end-member rhyolite in the bimodal volcanic rock association and A-type granitoids in southern Jiangxi have the geochemical characteristics of intraplate granitic rocks and the basic end-member basalt of the association is intraplate tholeiite,while the basaltic rocks in southern Hunan include not only intraplate tholeiite but also intraplate alkali basalt.Therefore the early Yanshanian magmatic suites in the Nanling region are undoubtedly typical post-orogenic rock associations.Post-orogenic suites mark the end of a post-collision or late orogenic event and the initiation of Pangaea break-up,indicating that a new orogenic Wilson cycle is about to start.Therefore it may be considered that the early Yanshanian geodynamic settings in the Nanling region should be related to post-orogenic continental break-up after the Indosinian orogeny and the break-up did not begin in the Cretaceous.     

Crustal movement and deformation in Taiwan and its coastal area

Introduction Both Taiwan Island and Chinese mainland belong to Eurasian plate in geological structure. And the nearest distance between Taiwan Island and Fujian Province, which is located on the opposite coast, is only 130 km. Although there are high-precision GPS networks in both Taiwan and Fujian Province, joint GPS measurement cannot be made directly because of the inconvenient contact due to the strait between them. However, the GPS networks arranged on b…     

济阳坳陷油田卤水溶解金属元素的初步实验研究

本文用模拟实验方法研究了不同水型的油田卤水在低温（40－150℃）条件下对金、银等金属元素的溶解和迁移作用，以及不同络阴离了对金属元素溶解迁移的贡献。结果表明，油田卤水促进了含油气盆地中Au、Ag、Pb、Zn元素的淋滤、溶解和迁移，起到了成矿流体的作用，从而积极参与了沉积改造矿床的成矿作用。CaCl2型油田卤水易溶解Pb、Zn，而NaHCO3型油田卤水溶解Au、Ag的能力较强。在油田卤水中HS^-及SO4^2-离子对Au、Ag元素的络合能力强，而乙酸根离子及HS^-(或S^2-）易络合Pb、Zn元素。     

遗传算法在反演三维地下水流模型参数中的应用

本文以非均质各向同性承压三维非稳定流为理想模型，结合有限元法讨论了用遗传算法反演水文地质参数问题，计算结果表明，本文在瘴简单遗传算法（SGA）的基础上提出的优体克隆＋子体优生遗传算法（BCC－YGCD－GA）具有收敛速度快，解的精度高和避免出现早期等优点，在水资源评价和矿床疏干计算中有广阔的应用前景。     

斜方顽火辉石-正铁辉石固溶体出溶机制的研究

通过组成－自由能关系曲线的分析，提出斜方顽火辉石－正铁辉石（MgSiO3-FeSiO3)固溶体出溶的临界温度约为753K；组成XFe为0.82左右的富铁辉石固溶体处于介稳态，出溶作用有利于系统自由能降低；出溶作用是以Fe^2 、Mg^2 离子逆扩散的方式进行的；出溶作用的推动力是上凸区域介稳相与平衡相之间的化学位差。     

GIS在数字校园建设中的应用

随着“数字地球”的提出及GIS技术的飞速发展，数字城市、数字小区建设也有了显著的成果，本文以数字校园为例，详细阐述了GIS以及MapObjects IMS软件网上发布地图信息进行的技术与方法在数字校园建设、管理中的应用及其意义。