青海聚乎更矿区侏罗纪含煤岩系沉积相研究

木里煤田聚乎更矿区位于祁连拗褶带西段,区内含煤地层为中侏罗统木里组和江仓组。根据野外露头剖面、钻孔岩心的观察及测井曲线特征,对中侏罗统的沉积特征和沉积相平面展布特征进行研究。结果表明：中侏罗统木里组主要发育辫状河-辫状河三角洲沉积体系,江仓组主要发育辫状河三角洲-湖泊沉积体系,厚煤层多发育在辫状河三角洲沉积体系,且物源多来自研究区东北部托莱山和南部大通山地区。该结论有利于查明潜在的赋煤区,为下一步的煤炭地质勘探工作提供理论依据。     

湖南城步地区1：5万区调主要成果与进展

在湖南西南部城步地区开展的1：5万区域地质调查,比较完整地建立了该区地层、构造格架以及岩浆演化序列。在青白口纪黄狮洞组火山岩夹层中获得锆石SHRIMPU—Pb年龄值828＋10Ma,为解决该地区乃至更大区域地层对比等基础地质问题提供了重要的年龄依据。根据岩体的接触关系、岩石学特征以及本次工作获得的同位素年龄资料,首次对...     

基于MODISEVI序列典型指标组合的土地覆盖分类研究

以2008年经Savitzky-Golay滤波技术平滑处理的MODIS EVI时间序列数据为数据源,采用支持向量机分类法对年EVI矢量模、年EVI最大值和年EVI最小值3个指标组成的影像进行土地覆盖分类,并利用验证样本对分类结果进行精度评价.试验结果表明:采用选用的3个指标不仅能减少分类的数据量、加快分类速度,而且还能...     

Sampling strategy to describe the temporal hydrochemical characteristics of an alpine proglacial stream

A hierarchical sampling programme (including continuous monitoring, twice-daily sampling and sampling at hourly intervals over selected 24 hour periods) was devised to support hydrochemical and hydrological research programmes on an alpine proglacial stream. The rationale for the research and for the sampling programme are explained and the hydrochemical time series generated over an ablation season are analysed to assess the degree to which they support the study aims. It appears that there is no satisfactory substitute for the chemical analysis of at least two water samples taken at approximately maximum and minimum discharge every day, if seasonal variations in meltwater chemistry are to be effectively characterized. Such time series data can be used to estimate Box-Jenkins transfer function-noise models between particular solutes (SO²⁻₄, Ca²⁺, Mg²⁺, Na⁺ and possibly K⁺) and either discharge or electrical conductivity, which can then be used to fill any short gaps in the data. This approach is not satisfactory even for filling short gaps in the twice-daily determinations of pH, HCO⁻₃ and NO⁻₃. At the diurnal time-scale (based on hourly determinations over 24 hour periods) electrical conductivity seems to provide a good surrogate for most of the solutes studied. HCO⁻₃, SO²⁻₄, Ca²⁺ and Mg²⁺ were found to be particularly strongly related to electrical conductivity and there was little if any significant serial autocorrelation in the residuals from all of the simple linear regression relationships that were estimated between individual species and conductivity. It is concluded that the hierarchical sampling design was suitable for the purposes of the study, and that the continuous monitoring of electrical conductivity provides excellent supporting information to the chemical analysis of water samples if it is used carefully as a means of short term calibration and interpolation of the solute record.     

广西佛子冲铅锌矿田构造发育过程探讨

广西佛子冲铅锌矿田构造受博白—岑溪断裂带控制，早期形成的ＮＥ向构造以挤压为主，稍晚的ＮＮＥ向构造以水平剪切为主，兼具挤压特征。矿田成矿与地洼晚期的引张应力场有关。文章通过岩石组构、有限应变测量和节理的综合分析，厘定了多期、复杂的矿田构造发展史。     

辽宁省金矿成矿系列划分及特征

通过对辽宁省金矿地质特征和成矿规律的研究，将省内金矿划分为 4个成矿系列组合， 5个成矿系列类型， 7种成矿系列， 13个亚系列和 17个矿床（式）类型，并阐述各成矿系列的主要特征及规律，为金矿的预测和勘查提供理论依据。     

用Hamilton方法计算弹性地球的章动序列

本文利用Hamilton方法研究弹性地球自转运动，采用地球模型PREM参数，给出了形状轴的章动序列．结果表明我们的方法是可行的，计算是可靠的．弹性地幔对地球章动的影响仅在毫角秒量级上，它相对液核对地球竟动的影响要小得多．     

Elliptic Anomaly in Constructing Long-Term and Short-Term Dynamical Theories

The techniques of Brumberg and Brumberg (1999) based on the use of elliptic anomaly are specified in this paper in two aspects. The iteration technique (Broucke, 1969) to construct short-term semi-analytical theories of motion in rectangular coordinates in lines of Encke and Hill is reelaborated in terms of elliptic anomaly resulting in extending this technique for high-eccentricity orbits. In constructing long-term semi-analytical theories the key point is to integrate trigonometric functions of several angular arguments related to time by different differential expressions. This problem is reduced in the paper to linear algebraic recurrence relations admitting efficient solution by iterations.     

西秦岭铁矿床成矿系列及其区域地质对比

西秦岭地区铁矿床分布广泛,类型多样,是进行矿床成矿系列研究的理想地区。按照矿床成矿系列研究的理论与方法,将该区铁矿床成矿系列划分为变质作用铁矿床成矿系列和沉积作用铁矿床成矿系列2个系列6个亚系列,并依据各系列、亚系列含铁建造的时空分布特征、成矿事件、成矿作用类型等地质特征,论述了成矿系列研究在地层分区归属、大地构造属性、区域地质构造发展演化以及区域地质对比研究中的重要作用。