On the significance of CO2 inclusions in plagioclase microphenocrysts in tholeiite from Moeraki,New Zealand

Liquid plus vapour inclusions of CO₂ are widespread in plagioclase microphenocrysts in small tholeiitic intrusions and tephra of the Moeraki and adjacent areas of northeast Otago, New Zealand. They imply the presence of immiscible CO₂ droplets in the magma at depths of about 7–14 km. Their presence within 5 μm of the edges of microphenocrysts as little as 35 μm thick and 118 μm long indicates minimal feldspar crystal growth during the final ascent and quenching of the magma. Delicate branching clusters of lath-like microphenocrysts escaped disruption during this ascent. Such CO₂ inclusions are a potential source of ‘excess argon’ perturbing K-Ar age determinations. Received March 24, 1993/Accepted September 10, 1993     

多元素与大骨节病关系的稳定性研究

对内蒙古三个典型大骨节病区<15岁人群发中21个元素和病情进行了三年连续定期观察,统计分析结果表明:(1)病区食物对人体元素含量的影响可以分为二种情况,一是元素在食物链中含量过低,食物的变化虽可使机体该元素发生变化,但变幅甚小,致使其代谢处于缺乏状态;另一类是机体内这些元素的含量因食物的改变而发生较大变化,显示这些元素与病情无内在联系.(2)对发中硒等2l个元素与病情分别作单相关和多元逐步回归分析,结果证明,硒缺乏是导致大骨节病早期病变的基本因素,而其它元素与病情的关系具有不确定性.     

AN~2 APPLICATION IN THE METRODS OF POPULATION GEOGRAPHY

1.PoPulation~aphyisthestudy0fthespatialdistributionmdarrangnatsofhumanpoPulation.ItisthesdenceofhowspatialvariarionsinthecomPosihon,growth,whgraion,anddistribLItionofpoPulatonsaiere1ataltospatialvariationsinthenatureofplaces.ThemethodsplayanimPohanroleinr…     

ADVANCES IN APPLIED RESEARCH OF THE OUTGOING LONGWAVE RADIATION IN CHINA

The outgoing longwave radiation(OLR)observed by NOAA satellite series has widely applied in various researchfields since the 1980s in China.In this paper,advances of the applied research of OLR are described in the following re-spects:(1)Studies of the global ITCZ;(2)Climatology of the subtropical high over northern Pacific;(3)Studies of the tropical cyclone over West Pacific;(4)Characteristics of the intraseasonal variation(ISV)of tropical convective activities;(5)Divergence wind and large scale circulation over the tropics;(6)Studies of the air-sea interaction;(7)Estimation of precipitation over the Tibetan Plateau and the Yangtze River(Changjiang River)basin during therainy season;(8)Analyses of regional climates of China;(9)Studies of prediction of the severe and disastrous weather and climate;(10)Atlas of OLR.The distinctive features of these advances are reviewed and the focal points of the OLR applied research in futureare also suggested.     

岩石摩擦-滑动中的声发射b值动态特征及其地震学意义

双剪试验的结果表明,岩石摩擦滑动过程中的AE b 值动态曲线可归纳为锯齿状和台柱状两类,分别对应于不规则粘滑和规则粘滑.滑动瞬间滑面上摩擦系数变化△μ的分布决定岩石的滑动方式,不均匀分布易发生不规则粘滑.均匀分布易引起规则粘滑;破裂和滑动是摩擦滑动过程中的两类AE 机制,两类AE 的能量分别与破裂面面积及△μ成正比.研究结果提示,平直光滑的地震断层可能显示出特征地震的发震特点.     

探地雷达图像的正演合成与偏移处理

本文讨论了射线追踪法实现二维地电断面的探地雷达图像的正演合成问题,其中包括二维地电断面的数字拟合、多层连续界面介质中高频电磁波的反射与透射统一的运动学边界方程;根据Huygen's-Fresnel原理导出了均匀介质中二维管状体模型的衍射雷达波的计算公式;给出了用射线追踪法合成的二维地电模型的探地雷达图像;用衍射波公式合成了二维管状模型的雷达图像,并与物理模拟作了比较.在此基础上,用Kirchhoff积分法对数字模拟与物理模拟记录的雷达图像作了偏移处理,并给出了实例.     

不发达地区区域开发的几个理论问题

本文在论述区域发展一般原理的基础上,分析了不发达地区的特殊性、不发达地区经济起飞必须具备的前提条件,肯定了国家干预对不发达地区开发的作用,提出了不发达地区区域开发的目标选择及综合开发战略。