浅成脉状金矿床及其分类概述

浅成脉状金矿是指在近地在至１．５ｋｍ深度，以充填方式形成，总体形状呈脉状金矿床。其赋矿围岩是多种多样的，以火山岩、次火山岩、浅侵入体最为常见，此外还有变质岩等。热液矿床的形成深度对矿体形状、产状、规模、物质组成和结构构造有重要影响。浅成脉状金矿是我国仅次于中深脉状金矿的第二个重要类型。介绍了浅成脉状金矿的地质特征及进一步分类的方案。     

ECONOMIC COOPERATION BETWEEN CHINA AND PAN-PACIFIC COUNTRIES:IMPLICATIONS FOR ECONOMIC AND REGIONAL DEVELOPMENT OF CHINA

1ntroductionSincel978ChinaembarkedonitsmodemiZaionprogramadopingtheopnDoorPOliCy.Sincethen,cooperationbe~nChinaandtheho-forificcountriesews)havebeenintensifiedandextensified.Noonlybilateraltradeactivitieshavebeenburgeoning,therehasalsobeenPhenomenatgrOWthinthedirectinvestmentineachothefseconomy.Besides,therehasbeenemergingsomenewtypesofmultinationalcoopefationtopromOtefullexploitationofmralandhumanresourcesandtoutilizeeachOther'scomParativeadvantags.TwoPedicularareaswhichmaybelookedaspoe…     

反循环中心取样雾化钻探应用于砾岩型金矿取样地质效果及其编录方法

中心取样钻探是一种全新的钻探方法，具有效率快、取样准确、岩样采取率高的特点。可用于砾岩型金矿勘探评价，获取的矿层深度、品位、厚度、岩心采取率等均能满足地质要求，利用回返物质能够进行正常地质编录。     

新型节水灌溉控制原理的应用研究

在土壤-植物-大气连续体系(SPAC)中,以植物茎、果微增长及其含水量变化作为植物需水信息建立的灌溉自动控制系统,可实现植物水分适度亏缺,有效调控其生长发育。实验结果表明,同充分供水的植株或树体相比,节水15.6%时,玉米长势良好,节水21.4%时,柑桔果实生长未受影响。     

开敞水域中航槽流场的数值模拟

建立了一个模拟开敞水域中航槽流场的平面二维数学模型.利用该模型计算得到的流速分布与袁美琦、李安中等人试验值相吻合,并计算了相当于天然情况下(各种水深、挖深比及航槽与水流的不同交角)的流场,得到了各种航槽与水流交角、不同挖深比的航槽流速折减系数变化规律图,及各种航槽与水流交角、不同挖深比的航槽中流向与航槽轴线交角的变化规律图,为开敞水域中航槽选线设计提供了依据.     

江苏北部开敞淤泥质海岸的侵蚀过程及防护

开敞淤泥质海岸是淤泥质海岸的主要类型，其自然演变过程，主要受沿海河流泥沙供应条件的制约，一旦泥沙供应消失，海岸往往进入不可逆转的侵蚀过程。江苏北部淤泥质海岸的侵蚀过程，起自１８５５年黄河入海口北归利津入海以后，主要是在近岸破波对岸滩物质的冲刷和潮流的输移扩散作用下进行的。通过对淤泥质海岸动力和沉积物性质的认识和概化，对海岸侵蚀过程作出定量模拟，并对该地区海岸防护工程作出评价和讨论。     

区域工业经济增长过程中劳动力、资金和技术的作用——以1973～1988年我国九省市国营工业为例

本文以1973～1988年我国九省市国营工业为例,运用生产函数对不同省区国营工业的劳动力、资金技术进步等要素对产出的贡献进行比较分析.     

VLBI单基线解算地球自转参数的秩亏性证明

本文由VLBI延迟观测的基本方程出发,证明了VLBI单基线观测解算地球自转参数时存在的秩亏性。     

Numerical Simulation of Regional Short-Range Climate Anomalies

With the high-speed development of numerical weather prediction, since the later 1980’s, the prediction of short-range climate anomalies has attracted worldwide meteorologists’ attention. What the so called short-range re-fers to the time scale from one month to one season or more. In dealing with the problem of short-range climate pre-diction, two points are needed noticing: one is the basic research to explore or investigate the mechanism of variability of the slow varying components which mainly include internal dynamics of extratropics, external forcings and tropical dynamics, and the other is the modeling efforts to simulate the process of the long-term evolution of the signal which include the improvement of model quality, stochastic prediction and the air-sea-coupled model (Miyakoda et al.,1986). Previous researches on the numerical prediction of short-term climate anomalies are mostly concentrated in the analysis of variables with global spatial scale, especially the global general atmospheric circulation analysis.As to the simulation or prediction of regional short-term climate anomalies, there exist many difficulties and problems. Though some meteorologists are devoting themself to this field, up to now, they have not reached satisfac-tory results. As a primary effort, by using the 2-level general atmospheric circulation model developed in the Institute of Atmospheric Physics, Chinese Academy of Sciences (IAP-AGCM) (Zeng et al., 1989), and taking the year of 1985 as a case, a numerical simulation of regional short-term climate change is completed. We pay high attention to the predictand of anomalous summer rainfall in the Yangtze River and Yellow River valleys, especially its month-to-month variation.