岩石力学联锁咬合岩块结构稳定性分析

首次建立了岩石力学中的多种联锁咬合岩块结构模型,介绍了块体理论的进展,并采用改进的DDA（块体不连续变形分析）法对块体进行了稳定性分析。     

Geochemistry of granitoid rocks and crustal evolution, Zhejiang Province, China— II. Proterozoic granitoid rocks

Proterozoic granitoid rocks in Zhejiang Province were formed in the Shengongian period (1.8–1.9 Ga) and the Late Jinningian period (0.6–0.9 Ga), respectively. Petrogenetic problems are discussed based on chemical (major, trace elements and REEs) and Nd-Sr isotopic compositions. The Shengongian granites resulted from partial melting of the Badu Group and the Late Jinningian granites are of mantle derivation with or without contamination of crustal material. The crust in Zhejiang had undergone three major periods of growth during 2.6–2.7 Ga, 0.8–1.1 Ga and 0.10–0.12 Ga after it was generated in Archean time. Compositional fractionation in the process of crust evolution is not evident. The presence of Late Jinningian granites of mantle and mantle-crust-derivation along the Jiangshan-Shaoxing Fault is indicative of crust subduction at that time. This project was finantially supported by both the National Natural Science Foundation of China (No. 9490011) and the Zhongguancun Test Center.     

云南省武定县地质灾害发育规律及其防治对策研究

武定县属抬升区,新构造运动较强烈,在野外调查的基础上,运用环境与灾害地质学的原理和方法,对境内地质灾害类型、空间分布特征及其成因和影响因素进行了分析,武定县具一定规模和危害的地质灾害点144处,北部相对集中分布,认为武定县地质灾害类型多样,活动频繁,灾情较重,并提出了防治对策,为武定县的地质灾害防治和减少人民生命财产的损失,提供了一定的参考依据.     

新疆东昆仑东部砂金分布及成因探讨

通过对新疆东昆仑东部地区砂金资源的野外实地调查,研究了区内砂金的分布类型,总结分析了砂金分布特征及规律。在成矿地质背景分析基础上,结合本地地理环境特点,气候特点,提出该区砂金的分布及形成与区内特定的高寒环境相关,并对原生金的寻找远景进行了初步评价。     

浙江省的地质灾害现状及防治对策

浙江省发育有崩塌、滑坡、泥石流、地面塌陷、水土流失、地面沉降等10余种地质灾害,人类工程经济活动是地质灾害发生的主要因素,减轻地质灾害危害的对策应以防为主。     

主题公园发展的影响因素系统分析

主题公园是一种投资大、风险高的新型旅游项目，通过大量的实证调查和文献总结，本文对影响主题公园发展的主要因素进行系统分析，这些因素是：客源市场和交通条件、区域经济发展水平、城市旅游感知形象、空间集聚和竞争以及决策者行为。     

溆浦县栏桥─景江砂锡矿床地质特征

溆浦砂锡矿床赋存在第四系冲积层中，锡石主要富集在底部砂砾石层。矿体呈层状，平均厚０．９２－１．６６ｍ，锡石平均品位６３２～１２２９ｇ／ｍ３。伴生锆石、独居石。本砂锡矿床与白马山花岗岩风化壳密切有关，矿床成因属第四系全新统冲积─堆积型细谷砂矿。     

冀西北水泉沟正长岩杂岩体的成因

水泉沟碱性正长岩杂岩体侵入于太古宇桑干群变质岩中，岩体主要由碱性长石正长岩、角闪碱长正长岩、正长岩、石英碱长正长岩等组成，属碱性岩系列，在岩石的石英颗粒中见有熔融包体的存在。岩石的稀土元素分布模式呈平滑的右倾模式，无明显的铕异常。岩石的Ｐｂ同位素组成为２０６Ｐｂ／２０４Ｐｂ＝１６．４５７～１８．２８６、２０７Ｐｂ／２０４Ｐｂ＝１５．２７０～１５．４７２、２０８Ｐｂ／２０４Ｐｂ＝３６．５３９～３７．３９３，石英的δ１８Ｏ值为８．０‰～８．５‰，（８７Ｓｒ／８６Ｓｒ）ｉ≈０．７０５，岩石的ｔＤＭ为１．６～１．９Ｇａ，εＮｄ（ｔ）为－７．４５～－１３．１，明显大于区域基底的εＮｄ（ｔ）值（－２０±）。以上结果表明，岩体为上地幔和下地壳物质部分熔融的产物。岩体角闪石３９Ａｒ－４０Ａｒ年龄３２７Ｍａ，为海西期岩浆作用的产物     

荒漠化及其系统过程

荒漠化是全球重大的社会经济和环境问题。本文通过分析荒漠化及其系统过程认为，荒漠化是在土地利用系统中由于不合理的土地利用方式造成植被覆盖度下降，并通过一系列反馈机制形成的土地退化过程。由于系统内植被破坏对土壤侵蚀存在放大效应，应注重对我国南方山地丘陵水蚀荒漠化的研究。     

Early hydrocarbon generation of biological lipids in non-marine lacustrine basins—a genetic mechanism of immature oil

Taking both eastern Linqing Depression and North Jiangsu Basin as examples, based on geochemical features of immature oils as well as source inputs of hydrocarbons and macerals, it is revealed that a mixed source input of alga bio-lipids and higher plant waxes is a basic characteristic of source material for immature oils in non-marine brackish-saline lacustrine basins. Project supported by the “85–102” Chinese National Key Science and Technology Project and the National Gas Geochemistry Key Laboratory, Lanzhou Institute of Geology, Chinese Academy of Sciences.