Abstract:依据弹性理论分析了张性结构面的应力，应变与两向主应力的对应关系。笔者认为在挤压应力条件下，甚至双向挤压应力作用下，完全有可能在最大主压应力方向两侧一定角域内产生张性或张扭性结构面。在两向压缩应力作用下，只有当σ２／σ１≥０．５时，才不会有张性构造区域出现。

Abstract:Moulins are powerful evidence for glacial development as well as a historic witness to paleo-climatic and paleoenvironmental shifts. Available data indicate that most moulins are developed on the bottom of glacial valleys and glacial beds and that they are small in size and limited in number. But the moulin swarms discovered in the medium-low mountains areas of Hebei and Inner Mongolia are mostly distributed on the mountain crests and peaks of hard granites. Moulins of five moulin swarms discovered and investigated on the spot now amount to more than 400~500, which are distributed at elevations of ca. 650~1500 m above sea level. These moulins are generally 0. 5~2 m in diameter and 0. 2-1 m or so in depth. The largest moulin is about 10 m wide and about 3. 5 m deep, whereas the mouth width and depth of the smallest moulin are both about a few centimeters; the deepest moulin is about 5 m in depth with a mouth width of only 0. 12 m. Most moulins are round, elliptical or irregular in shape with a small mouth, a large belly and a flat bottom. The discovery of large numbers of moulin swarms in the medium-low mountains areas of Hebei and Inner Mongolia provides evidence that large-scale glaciation did took place in the early Quaternary in medium-low mountains areas of eastern China. This discovery provides very important grounds for the study of the global paleoclimatic and paleoenvironmental evolution and also has great significance for the tourist resources and economic development.

Abstract:本文通过对安徽北部两个奥陶系剖面豹皮灰岩(俗称豹斑)的宏观、微观及地球化学特征研究,认为豹皮灰岩的形成与奥陶纪灰岩沉积过程中的古岩溶作用及其后生改造密切相关。其形成演化模式可概括为4个阶段:①碳酸盐岩沉积间断暴露地表发育裂隙;②各种裂隙淋滤溶蚀形成沉积岩溶洞穴体系;③海侵导致海相沉积物充填岩溶洞穴;④回流渗透或混合作用使充填物白云石化而形成“斑”。

Abstract:The arsenate minerals are the secondary minerals which occur mainly in oxidized zones of sulfide deposits. More than 250 arsenate minerals have been found in nature , but only 39 are found in China. One of the remarkable characteristics of arsenate minerals is that most of them are bright-coloured in green (yellow or red). These minerals commonly show fibrous, acicular, columnar, tabular and cubic crystalline forms, but, being formed in surface conditions, they often occur in botryoidal,kidney and spherulitic aggregates with low degrees of crystallization. These minerals are of complicated chemical compositions, consisting of poly-metallic elements and molecular groups, especidly H2O, OH or halogens. They are closely related to arsenopyrite, As-bearing minerals, chalcopyrite, pyrite, galenite etc. during their formation and development, generally formed in an environment of weakly acid-neutral oxidizational media (pH=3~7) in warm, humid and rain tropic-subtropical zone, and with the carbonatites as wall rocks of the deposit. Arsenate minerals are one of the important products at the latest stage of development of oxidized zones of sulfide deposits. Their paragenic types are often closely related to the mineral compositions of the primary ores. So, arsenate minerals may be used as one of the indicators for seeking Cu (Sn)-Pb-Zn poly-metallic sulfide deposits in the gossans and oxidized zones of well-developed arsenate minerals.

Abstract:The nappe structure of the Funiu Mountains is an important structure in Qinling orogenic belt. It is formed by three structural zones. There are a lot of strong folds and reversed faults in the front zone of this nappe structure. The Luonan-Luanchuan fault is the demarcation line between the front zone and the middle zone. The middle zone consists of typical structures in the Luanchuan area, which show duplex structures. The Zhuyuangou-Zushimiao fault is the line of demarcation between the middle zone and the root zone. There are a lot of deep-seated rocks in the root zone. The nappe structure of the Funiu Mountains was formed in the late Yanshanian to the early Himalayan. It is a product of the continuous northward subduction of the Yangtze plate and the southward intracontinental subduction of the North China plate and also the result of superposition of structures of different ages and features.

Abstract:Ostracod fossils described in this paper were collected from the Sarezheyi Formation of the Qiudayisayi section in the northeast area of the Tarim basin. The formation consists lithologically of grayish brown calcareous lithic sandstone, siltstone and silty mudstone. Fossils are rich and include nine genera and 16 species, making up an ostracod fauna represented by Roundyella, Heal-dia, Sulcella and Bairdia. The more abundant forms are Roundyella and Healdia with subordinate Sulcella, Bairdia and Pseudoparaparchites. The new species form the bulk of the fauna, so the fauna displays a very strong endemic character, which makes the fauna notably different from the ostracod fauna dominated by Bairdia in Early Permian strata of southern China. The fossils associated with ostracods are fusulinids, conodonts and foraminifers. This fauna is Early Permian in age and it is inferred that it might belong to the forms living in a warm, semi-enclosed shallow-sea bay environment with weak hydrodynamic conditions.

Abstract:塔里木盆地自震旦系－第四系可划分为３个巨层序组，６个≤级层上吉级层序和４２个Ⅱ级层序，３层且反映了区域构造发展的３个大地构造旋回及其相应的区域大地构造事件在其巨层序组演化过程中的影响。

Abstract:The Neogene Yinggehai-Huangliu Formation in the Qiongdongnan basin consists of very thick marine deposits. Many cycles of sea-level changes have occurred in this epoch. The sea-level changes were related to sequences and bioevents. Based on quantitative studies of the abundance and diversity of foraminifers from the Ya-A-2 well and oxygen and carbon isotopic records of planktonic foraminiferal tests from the Ya-A-1 well, the relative sea level change curve has been constructed in the Yinggehai-Huanglui Formation. In addition, the paper analyzes the migration of the onlap point in main seismic data and reconstructs the paleodepth of the sea water according to the slope-basin depositional system in the Qiongdongnan basin. Nine sequences have been recognized based on seismic data. Sequence chronostratigraphy has been established in the light of newly-revised geomagnetic polarity time scale for the Cenozoic, new late Neogene time scale and Cenozoic geologic time scale. The ages of nine depositional sequence boundaries have been determined again.

Abstract:将元素分析仪与气体质谱仪连接起来，能够进行硅酸盐岩石微量碳的含量和同位素比值测定。本文介绍了笔者建立这－ＥＡ－ＭＳ连续技术对天然岩石样品方法中全碳的含量和同位素组成，结果发现这些岩石普遍含有较高的轻碳。

Abstract:将黔西南煤层中不同同成因的７种主要矿物分离，对其进行光学显微镜，扫描电镜及能谱分析，利用冷原子吸光谱测定煤及矿物中汞的含量；并结合矿物包裹体测量和硫同位素分析，研究结果表明，黔西南煤层中汞主发布于矿物中。

Abstract:宁芜向山—皇姑山地区铁硫矿床中及附近存在大片硅质岩,属热泉沉积的硅华。其微量元素Al、Mn、Cu、Pb、Zn含量较高,且具有稀土元素总量较低,Ce明显亏损,Eu明显富集等特征。据岩石学、岩石化学特征,结合微量元素、稀土元素与同位素等综合研究表明,矿床附近硅质岩为热水成因,硅质可能来自下伏及深部地层。

Abstract:强烈构造活动区重大工程场址的评价是目前国内外研究的难题。本文以新疆乌鲁木齐二电厂为例，应用风险度和专家系统对该厂区及附近断裂的活动性及其地震工程地质交效应进行了研究。采用Ｗｅｉｂｕｌｌ函数，综合考虑了裂活动可能产生的振动、错动，蠕滑，地面裂缝，液化和崩塌等６种因素，建立了该区断裂地震工程地质模型；运用ＣＲＵＳＴＡＢ专家系统，综合了地质条件，地震条件和地震球理对厂区断断裂可能产生的地震地面运动，断及