虎头崖铅锌多金属矿床矿体三维空间变化结构及分布规律          下载免费PDF全文

曹芳  毛先成  邹艳红  赵莹  邹品娟  吴泽权 《地质找矿论丛》2013,28(1):41-49

文章利用Vulcan和Datamine三维可视化软件建立了虎头崖铅锌多金属矿床矿体的三维实体模型、块体模型及地层三维实体模型;运用地质统计学方法分析了虎头崖矿区67线以东和117线以西矿体的Pb,Zn品位空间变化结构,得出搜索椭球体,实现了虎头崖铅锌多金属矿床矿体、地层形态和铅锌品位变化形态的空间分布展示;结合三维建模结果和铅锌矿体空间变化结构,总结出矿体空间分布规律,并用三维可视化软件对矿体分布规律进行显示,指导隐伏矿体的预测,寻找有利的找矿部位。  相似文献   

Simulation of the full two rigid body problem using polyhedral mutual potential and potential derivatives approach   总被引：3，自引：0，他引：3  

Eugene G. Fahnestock  Daniel J. Scheeres 《Celestial Mechanics and Dynamical Astronomy》2006,96(3-4):317-339

Herein we investigate the coupled orbital and rotational dynamics of two rigid bodies modelled as polyhedra, under the influence of their mutual gravitational potential. The bodies may possess any arbitrary shape and mass distribution. A method of calculating the mutual potential’s derivatives with respect to relative position and attitude is derived. Relative equations of motion for the two body system are presented and an implementation of the equations of motion with the potential gradients approach is described. Results obtained with this dynamic simulation software package are presented for multiple cases to validate the approach and illustrate its utility. This simulation capability is useful both for addressing questions in dynamical astronomy and for enabling spacecraft missions to binary asteroid systems.  相似文献   

松辽盆地泰康地区青山口组沉积相及与油气分布关系研究   总被引：8，自引：0，他引：8  

张智礼  刘振文  蒙启安  曹立君 《高校地质学报》2006,12(2):259-265

系统地研究了松辽盆地泰康地区青山口组沉积相类型及沉积特征,其中对青一段与青二、三段的沉积相平面分布与垂向演化规律做了较深入地探讨。研究表明,青山口组主要发育湖泊相与三角洲相2种沉积相类型,其中湖泊相包括2种亚相与4种微相,三角洲相包括2种亚相和2种微相。沉积演化分析表明,青一段以深湖、半深湖相泥岩沉积为特征,青二、三段以浅湖相与三角洲相砂泥岩互层为特征。区内青山口组主要存在三种类型的储层砂体,分别为三角洲前缘河口坝砂体、三角洲前缘远砂坝砂体和浅湖砂体,其中浅湖砂体是最好的含油砂体,浅湖砂体发育的优势区也即浅湖沉积亚相发育区是区内最重要的油气富集区,是今后油气勘探的有利地区。  相似文献   

重新认识和划分矿床类型——隐伏岩金矿体定位预测的一个重要前提   总被引：2，自引：0，他引：2  

张宝林  蔡新平  韩金良 《地学前缘》2000,(Z2)

目前流行的岩金矿床分类方案是依据地表已遭受一定剥蚀的矿床地质特征和成因理论而建立的 ,为了有效地开展隐伏岩金矿体定位预测工作 ,必需重新认识和划分矿床类型 ,弄清哪些特征真正具有可比性。文中分析了现有分类方案中几个亟待解决的问题 ,结合金矿的“特殊性” ,提出应简化矿床类型、将成矿区带作为分类的目标 ,将成矿系统作为分类的基础。  相似文献   

Equations of motion of the restricted problem of (2 + 2) bodies when primaries are magnetic dipoles and minor bodies are taken as electric dipoles     

A. Prasad  Bhola Ishwar 《Celestial Mechanics and Dynamical Astronomy》1996,64(4):305-312

In this problem of the restricted (2 + 2) bodies we have considered two magnetic dipoles of masses M ₁ and M ₂(M ₁ > M ₂) moving in circular Keplarian orbit about their centre of mass. Two minor bodies of masses m ₁, m ₂(m _j< M ₂) are taken as electric dipoles in the field of rotating magnetic dipoles. These minor bodies interact with each other but do not perturb the primaries.We have found equations of motions which differ from that of Goudas and Petsagouraki's (1985).  相似文献   

Figures of equilibrium in close binary systems     

J. A. López Ortí  A. López García  R. López Machí 《Celestial Mechanics and Dynamical Astronomy》1992,53(4):311-322

The equilibrium configurations of close binary systems are analyzed. The autogravitational, centrifugal and tidal potentials are expanded in Clairaut's coordinates. From the set of the total potential angular terms an integral equations system is derived. The reduction of them to ordinary differential equations and the determination of the boundary conditions allow a formulation of the problem in terms of a single variable.  相似文献   

The Study of Kuiper Belt Objects With ESO and ISO     

Nicolas Thomas 《紫金山天文台台刊》1996,(3)

Amajor objective of the Infrared Space Observatory (ISO) is the determination of the sized and albedoes of several objects in the "Kuiper disc".The method by which this will be achieved is described.It is shown that the unknown shapes and surface thermal properties proviede additional complications to the interpretation of ISO data.The requirement for ground-based measurements of the visual light curves of these objects is demonstrated and the implications of the results of the ISO observ Vations is discussed.  相似文献   

Application of the European water framework directive in a Western Mediterranean basin (Málaga,Spain)     

F. Carrasco  D. Sánchez  I. Vadillo  B. Andreo  C. Martínez  L. Fernández 《Environmental Geology》2008,54(3):575-585

The water framework directive (WFD) is applied within the Guadalhorce river basin, a Western Mediterranean basin in the Málaga province (South Spain). Criteria defining different surface and groundwater bodies are described. The basic hydrographic network is constituted of low-mountain and low-altitude Mediterranean mineralized rivers. Heavily modified surface water bodies correspond (1) to areas where dams regulate the main watercourses, (2) to areas downstream of reservoirs, where river flow is reduced, and (3) to the coastal sector of the river where artificial channelling has caused morphological variations. Groundwater bodies are related to carbonate and porous aquifers and, locally, to aquifers influenced by dissolution of evaporites. The main impacts to water bodies are irrigated lands and livestock farming. There are also point sources of pollution, such as wastewater, landfills, golf courses, industrial zones, quarries and petrol stations. In addition, groundwater is frequently pumped for human supply and irrigation. Qualitative status of groundwater bodies was done by chemical analysis of samples from a monitoring network and the quantitative status by examining variations in piezometric levels. Both revealed the existence of water bodies at risk of not meeting the environmental objectives of the WFD. The main indicators of pollution are nitrates related to agricultural activities, and total organic carbon (TOC), PO₄³⁻ and NH₄⁺ in relation to wastewater.  相似文献   

广西金牙金矿床中饱和烃丰度分布特征及其意义   总被引：2，自引：0，他引：2       下载免费PDF全文

肖建新  张爱云 《地球科学》1997,22(2):177-180

对广西金牙金矿床的可溶有机质族组成和气相色谱分析表明，矿体饱和烃的丰度低于围岩，矿体与围岩总抽提物所气相色谱图亦明显不同，尤其是甲醇－丙酮－苯抽提物的区别更明显，矿体与围岩饱和烃丰度的差异为分析有机质在金矿形成过程中的作用提供了线索，对其意义进行了讨论。  相似文献   

黔中茶店桥地下河流域不同水体硫酸盐浓度特征及来源识别   总被引：8，自引：0，他引：8  

任坤  潘晓东  兰干江  焦友军  曾洁  孟小军  庞园 《地质学报》2016,90(8):1922-1932

茶店桥地下河位于西南岩溶区,流域内"三水"转换迅速,地下水是当地的重要饮用水源。本文对流域内雨水、地表水、地下水中的SO_4~(2-)浓度进行了测试,利用氘(δD_(H_2O))、氧(δ~(18) O_(H_2O))同位素示踪地表水、地下水补给来源,用硫酸盐硫(δ~(34)S_(SO4))、氧(δ~(18) O_(SO4))同位素探讨了地表水、地下水中SO_4~(2-)的来源,并计算了地下河出口河水中不同SO_4~(2-)来源的贡献比例。结果表明:1不同水体中SO_4~(2-)浓度大小顺序为地表水地下水雨水,与邻近区域相比,茶店桥地下河流域雨水、地表水、地下水呈现富集SO_4~(2-)的特征。2地表水、地下水的主要补给来源为大气降水,硫酸不仅和HCO_3~-共同参与了流域内碳酸盐岩的溶解,也参与了雨水中含钙镁颗粒物的溶解。3地表水δ~(34)S_(SO4)、δ~(18) O_(SO4)值分别介于-12.98‰~-10.19‰和-0.54‰~+9.13‰之间,地下水δ~(34)S_(SO4)、δ~(18) O_(SO4)值分别介于-14.32‰~+16.58‰和+2.81‰~+14.35‰之间,SW02的SO_4~(2-)主要来源于大气降水,SW01、SW03、GW02、GW03、GW06主要来源于煤层,GW05主要来源于石膏,GW01、GW04为混合输入源。4地下河出口河水中大气降水带来的SO_4~(2-)贡献比例为13%,煤层硫化物氧化的贡献比例为40%,石膏溶解的贡献比例为47%。  相似文献