东川运动及其对东川矿区褶皱构造的影响

分析了当前东川运动的各种认识,通过上下地层的特征、构造、变质作用、火山-岩浆活动、形成背景以及汤丹、落雪和拖布卡3个典型剖面的研究,确定该运动是一次大规模的构造运动。东川运动是南北向挤压运动,在东川矿区下（昆阳）亚群形成东西向褶皱构造,被后期小黑箐和晋宁运动叠加改造后,其构造形迹变得模糊和复杂,但经仔细研究分辨出了10个较大的褶皱构造。      

山东省前寒武纪几个基础地质问题

根据１∶５万区调及科研所取得的新资料、新成果,论述了山东前寒武纪几个基础地质问题：关于山东大地构造划分问题;山东早元古宙粉子山群与荆山群的关系;山东前寒武纪侵入岩的填图方法。     

青海卡巴纽尔多地区上三叠统巴颜喀拉山群牙形石的发现及其意义

在青藏高原北部卡巴纽尔多湖-错坎巴昂日东湖一带上三叠统巴颜喀拉山群中首次发现牙形石Epigondolella sp.、Metapolygnathus communisti、Metapolygnathus spp.、Metapolygnathus primitius及有孔虫Gaudryina sp.、Jacullella sp.、Verneulinoides maurtii（Terquem）、Gaudryina triassica Trifonova、Ammodiscus sp.等。其中,Epigondolella与Metapolygnathus均为晚三叠世诺利期典型牙形石和常见类型,有孔虫亦显示为晚三叠世常见分子,从而为厘定该套地层时代提供了重要生物依据,对于该地区巴颜喀拉山群形成于早三叠世和中三叠世早期的观点有待于重新审视。     

江山—绍兴断裂带陈蔡岩群片麻岩SHRIMP锆石U-Pb年龄及其地质意义

浙江诸暨陈蔡地区发育一套副变质岩层,由中深度变质的片麻岩、片岩和大理岩组成,与双溪坞群为断层接触,其地质时代多被视为与江山—绍兴断裂带南东侧的华夏地块古老变质基底相同。陈蔡岩群地处江绍断裂带北东端,变质和变形较深,前人将其划归为华夏古陆的小块体,地层时代曾与福建古元古代麻源岩群或浙江八都岩群和江西中元古代铁砂街组对比。在陈蔡岩群下吴宅组含榴夕线黑云斜长片麻岩及含榴黑云斜长片麻岩中获得大量的锆石,具有典型的核、幔、边结构,核部年龄集中在新元古代,206Pb/238U年龄加权平均值为848±10Ma和845±9Ma,锆石后期增生边部年龄多为加里东期的年龄,206Pb/238U年龄加权平均值为431.4±7.8Ma。陈蔡岩群斜长片麻岩获得的锆石核部较单一的U-Pb年龄,反映出陈蔡岩群下吴宅组夕线石所代表的泥质成分所含的锆石单一,其锆石核部年龄应代表陈蔡岩群下吴宅组的原岩年龄;同时,认为陈蔡岩群既不能与福建古元古代的麻源岩群对比,也不能与江西地区中元古代铁砂街组对比。其原岩为稍晚于双溪坞群（905~877Ma）的新元古代地层（848~845Ma）,从年代上倾向于江南造山带范畴。该年龄对江山—绍兴断裂带变质地层的区域对比和构造演化有重要意义。     

新疆喀喇昆仑地区甜水海岩群发现青白口纪叠层石

2003年在对新疆喀喇昆仑地区原划长城系甜水海岩群进行地质填图及实测剖面的工作中,采集到了大量叠层石化石,时代为新元古代青白口纪。该群岩石变形非常强烈,变质达绿片岩相。本次区调依据其岩石变形变质特征,结合叠层石化石资料,对其形成时代进行了重新厘定。     

Taphofacies of Lower-Middle Pennsylvanian marine invertebrates from the Monte Alegre and Itaituba formations,part of the outcropped marine sequence of the Tapajós Group (Southern Amazonas Basin,Brazil) – regional palaeoecological models

One of the most relevant characteristics of the Pennsylvanian shallow-water carbonates of the Amazonas Basin is its diverse and well preserved invertebrate fossiliferous assemblages. In order to better understand the origin of these fossil concentrations, taphonomic data were obtained along well exposed areas of the uppermost part of the Monte Alegre Formation and basal part of the Itaituba Formation, which, based on conodonts, fusulinids and palynomorphs is of Atokan age. The taphonomic data focused on invertebrate organisms were supported by petrographic analysis. The understanding of the stacking pattern of the strata in the studied section allowed the identification of five type taphofacies, which contributed in the development of regional palaeoecological models, expressed as block-diagrams. These characterize the distribution of the environmental parameters, the composition of the faunal associations and the distribution and amplitude of the taphonomic processes that created the taphonomic signatures of the bioclastic elements throughout the supratidal to lower intertidal/deep subtidal depositional environments pertinent to the studied depositional environment. The regional palaeoecological models here presented are related to the particularities of the depositional environments of the studied rocks and are exclusive for the characterization of this intracratonic basin set influenced by high frequency climatic variations. Lithofacies, biofacies and taphofacies associations also reflect depositional conditions pertinent to the studied regional context, differing from the elements observed in modern intracratonic contexts analogous to the one studied, from different sedimentary basins around the world. Therefore, invertebrate taphonomy, supported by the analysis of sedimentary facies, fulfills the purposes recommended in this work, demonstrating its potential as a tool for palaeoecological analysis in the Pennsylvanian outcropping section in the southern platform of the Amazonas Basin.     

珲春7.0级深源地震前地下流体加卸载响应比群体异常的变化特征

用加卸载理论对珲春7．0级深震前加卸载响应比群体异常随时空的变化进行了研究，结果表明响应比群体异常项次具有配套性，在时间上具有突变性，在空间上具有迁移性，是中期异常阶段向短期异常阶段过渡中的标志，是非线性系统失稳的过程。     

The Somerset Dam Layered basic intrusion,Southeastern Queensland

The Somerset Dam Layered Basic Intrusion is probably a sub‐volcanic magma chamber, and it consists of 20 saucer‐shaped layers composed of troctolites, olivine gabbros, ferrigabbros, and leucogabbros. The layered sequence is 1650 ft (500 m) thick, and comprises several repetitions of a standard pattern termed a zone. Each zone is generally composed of four layers, and successive mineral assemblages from the base upwards are: plagioclase‐olivine, plagioclase‐augite‐olivine, plagioclase‐augite‐magnetite‐ilmenite, and plagioclase‐uralite. Pronounced modal and textural changes define the boundaries between these layers. Within a zone, systematic variation in the proportions and compositions of minerals is thought to be the result of a slight decrease in temperature, and an increase in the partial pressures of water vapour and oxygen from the base to the top.

Repetition of zones is explained by a mechanism involving periodic renewals of magma. Lack of progressive changes in mineral compositions and proportions from the base to the top of the layered sequence is also a consequence of the magma composition, the control of water vapour pressure, and the limited range of crystallisation temperatures. Gravitational settling of early minerals does not explain the variation within a zone, or the small‐scale rhythmic layering that is locally developed, and it is concluded that diffusion has been an important control.     

湘西南元古宙高涧群微量元素主成分分析

主成分分析法（PCA）是多元样本数据的数理统计方法。本文结合湘西南元古宙高涧群地层剖面等离子光谱分析所得Au、Ag、As、Sb、Cu、Pb、Zn、Sr、Ba、Mn、Co、Ti、Cr共13个微量元素的主成分计算结果和图解,解释了主成分参数和图解的地质含义。在C剖面和L剖面上,主成分F1具有相似的信息量,反映高涧群“原始”沉积物以铁镁矿物为主要特征。F2的信息量不同,在L剖面上,F1－F2图解可以将13个“原”变量分为5组“原”变量的组合：Co-Zn-Cu(Mn、Ba)、Ti-Cr、As-Pb、Au-Pb-Sr和Ag,Ag主要来自碎屑沉积物;在C剖面上,“原”变量的组合特征不明显,As、Cr、Sb、Ti与F2呈正相关,Sr与F2呈负相关。在L剖面上,Au主要受氧化条件制约;在C剖面上,海水较深,还原条件有利于Au、Ag的沉积。由于沉积环境不同,研究区的南部和北部一些微量元素存在明显的差异。根据（di^k)^2计算值,Ag、Pb的分布部分与后期构造破坏有关。