新疆东准噶尔石炭纪火山机构类型与时限   总被引：10，自引：2，他引：8  

谭佳奕  王淑芳  吴润江  张元元  郭召杰 《岩石学报》2010,26(2):440-448

东准噶尔卡拉麦里大气田的主要储层是石炭纪火山岩,石炭纪古火山机构的样式与组合特征,与火山岩储层展布关系密切。野外调查表明,隐爆角砾岩是东准噶尔石炭纪古火山机构最常见的标志之一。东准噶尔石炭纪古火山机构类型主要有中心式、裂隙式和裂隙-中心式等样式。中心式火山机构以大石头层状火山、柯克巴斯套锥状火山最为典型;巴塔玛依内山附近沿断裂分布的带状火山岩具有裂隙式喷发的特征;东黑山火山具有火山口串珠状排列特征,是裂隙-中心式喷发的产物。大石头地区原缪林托凯陶山组火山岩的锆石SHRIMP U-Pb年龄为345.6±7.1 Ma,而已知巴塔玛依内山组火山岩年龄是350.0±6.3Ma,因此东准噶尔火山活动的主要时期是早石炭世。  相似文献   

宇宙探索与钻探技术          下载免费PDF全文

鄢泰宁  冉恒谦  段新胜 《探矿工程》2010,37(1):3-7

钻探技术已成为人类探索宇宙的首批技术之一。以月球钻探为例,论述了外星球钻探的特点和难点;介绍了美国、前苏联钻探专家与航天专家合作研制的轻便、高可靠性、全自动月表取样钻机及其钻进工艺的现状;分析了各种钻进方案的优缺点;结合我国将要实施的“嫦娥3期”工程,就月球自动采样并返回技术提出了设想。  相似文献   

川东伏旱与日月食关系及其预测     

汪宝山  李跃清  廖崇明 《成都信息工程学院学报》1999,(1)

日月食等天文现象使日、月球对地球的引潮力迅速增长，从而影响天气气候的变化，经分析表明，日月食与当年川东盛夏旱涝气候的发生关系密切。利用日月食出现日期、运行轨迹在若干年前就可以计算出来，信息来源特别超前的这一特点，制作出２１世纪初气候预测。预计：２１世纪初的前１０年，川东有６年为伏旱年，４年为轻或无伏旱年。  相似文献   

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丰海  李建成  张守建  邢乐林 《大地测量与地球动力学》2009,29(3):131-134

??????????????????????????3?????????Ρ?ī??????????o????????????????????GLTM??2???????????LP165????????o?????????????????￡??????????γ???60??Χ????κ?ī????????????????????????????????????????????????????????????15??76 km?????48.6 km???o????????????????  相似文献   

The “susceptibility factor” in the atmospheric response to periodic forcing     

William H. Campbell  Reid A. Bryson 《Journal of Earth System Science》1993,102(1):157-173

Evidence is presented of a periodic component in the inter-annual variability of precipitation and pressure data for India during June, the month of the onset of the Indian southwest monsoon. Two frequencies that explain a statistically significant percent of the variance in these data sets are the same as the two that explain most of the variance of the average monthly lunar tidal potential for June. Not only are the frequencies the same but they are also in phase which strongly suggests that lunar tides in the atmosphere do, in fact, produce an element of climatic variability. The amplitude of the atmospheric response to this periodic forcing was not constant in time but was found to be related to the long term change in northern hemispheric surface temperature. This susceptibility of the atmosphere to an external forcing results in a nonlinear relationship between forcing and response. As a result, nonlinear regression had to be used in order to adequately define the magnitude of the response at a given frequency. The ramifications of this nonlinear response are discussed. The nonlinear interaction of the northern hemisphere temperature and the 18.6 year lunar nodal cycle results in a modulation of the frequency which appears in a linear spectral analysis near 22 years. Thus, the 22-year cycle often found in meteorological data sets may instead be the result of the modulated nodal cycle.  相似文献   

月球地形测绘和月球大地测量(5)   总被引：8，自引：1，他引：8  

陈俊勇 《测绘科学》2004,29(6):7-10

主要介绍月球地形测绘和月球大地测量的情况。第一部分论述了月球大地测量(Selenodesy)的定义和方法。月球大地测量的一个特点是它的观测数据绝大部分都要依靠航天探测器或环月、绕月卫星来获取。月球大地测量的内容可以考虑有三个方面:一是在月球上给出一个有确定定义的坐标参考系,并在其中布测一个控制网;二是确定这一月球参考系的大地测量几何和物理常数;三是求定月球的外部重力场。第二部分介绍月球地形测绘。重点介绍了月球地形的特点,它大体分为月海、月陆、环形山等三种类型。  相似文献   

Low energy trajectories for the Moon-to-Earth space flight     

V. V. Ivashkin 《Journal of Earth System Science》2005,114(6):613-618

The Moon-to-Earth low energy trajectories of ‘detour’ type are found and studied within the frame of the Moon-Earth-Sun-particle system. These trajectories use a passive flight to the Earth from an initial elliptic selenocentric orbit with a high aposelenium. The Earth perturbation increases the particle selenocentric energy from a negative value first to zero and then to a positive one and therefore leads to a passive escape of the particle motion from the Moon attraction near the translunar libration pointL ₂. This results in the particle flight to a distance of about 1.5 million km from the Earth where the Sun gravitation decreases the particle orbit perigee distance to a small value that leads to the particle approaching the Earth vicinity in about 100 days of the flight. A set of the Moon-to-Earth ‘detour’ trajectories is defined numerically. Characteristics of these trajectories are presented. The ‘detour’ trajectories give essential economy of energy (about 150 m/s in Delta V) relative to the usual ones.  相似文献   

Luna-Glob project in the context of the past and present lunar exploration in Russia     

E. M. Galimov 《Journal of Earth System Science》2005,114(6):801-806

The Russian Luna-Glob project has been conceived with a view to understand the origin of the Earth-Moon system. The objectives and main features of the Luna-Glob mission, which will mainly study the internal structure of the Moon by seismic instruments, are described in the context of the past and current program of lunar exploration in Russia.  相似文献   

An analysis of near-circular lunar mapping orbits     

R. V. Ramanan  V. Adimurthy 《Journal of Earth System Science》2005,114(6):619-626

Numerical investigations have been carried out to analyse the evolution of lunar circular orbits and the influence of the higher order harmonics of the lunar gravity field. The aim is to select the appropriate near-circular orbit characteristics, which extend orbit life through passive orbit maintenance. The spherical harmonic terms that make major contributions to the orbital behaviour are identified through many case studies. It is found that for low circular orbits, the 7th and the 9th zonal harmonics have predominant effect in the case of orbits for which the evolution is stable and the life is longer, and also in the case of orbits for which the evolution is unstable and a crash takes place in a short duration. By analysing the contribution of the harmonic terms to the orbit behaviour, the appropriate near-circular orbit characteristics are identified.  相似文献   

中浅成含矿岩浆的隐爆作用机制与两相分离流动   总被引：1，自引：0，他引：1  

黄定华  向树元  朱云海  叶俊林 《地球学报》1996,17(Z1):130-134

本文首次从物理上讨论了隐爆作用的具体机制，指出隐爆作用的本质是由超压导致相变而发生的一种快速物理反应。分析表明，岩浆上侵至低围压的中浅层环境→气水组分分离并产生气泡→后续岩浆提供高压力梯度而导致超压，即为隐爆作用得以发生的充要条件。模拟实验表明，在隐爆发生的瞬间，岩浆中的多相组分因密度差而发生分离流动，围岩则在爆轰冲击下局部碎裂并气、液化，从而使相关的热液活动及多种成矿作用得以进行，由此形成相应的隐爆角砾岩系列及其矿床组合.  相似文献