对东应和太平洋北西部之间过渡带构造的新探讨

通过对东亚和太平洋西北部之间过渡带构造资料的详细分析,得出如下结论,边缘海和岛弧的起源可能只是由于一种很普通的机制。这种机理就是地球自转速度的变化。地球物质的特性与流变体类似,这使得地球保持的形态看起来很象旋转椭球体的形态。然而,由地球自转速度的变化可以导致物质块体的运动。自转速度的减慢增加了大陆板块在地幔下层的压力,在这种情况下,大陆板块就从大陆边缘的下面被向上置换,并由于惯性能的积累,而使其运动速度超过已经减慢了的东     

受应力岩石中由物理—化学反馈引起的分异构造

本文回顾了一些我们描述变形岩石与其所含流体之间相互反应的数学模型,特别是,我们主张用自组织作用概念作为一种理解从成岩作用到变质条件范围岩石中所观察到的图案状构造演化的一种方式。由于矿物自由能依赖于围岩的结构,这些结构由导源于物理力与化学反应迁移的耦合作用所形成的反馈。在不同极限或初始条件中,同一公式抓住了许多行为的本质,把相关的变形构造观察成缝合线、粒间压溶、破壁理、变质层状构造与由结晶生长力所产生的矿化分异作用。这些方程可预测变质分异作用任何趋势的可能性,并显示了化学因素是如何对岩石的变形效应施加了强烈的影响。     

法国中央地块Rouergue地区的逆变质分带现象与华力西期推覆构造及其矿物和区域规模的P-T-t轨迹

野外证据及显微构造分析证明了Rouergue地区华力西期地体中有三种构造成因的逆变质成带现象,它们与大规模岩片逆冲作用相关,而且变质作用早于岩片向南的构造就位过程。矿物平衡、石榴石—黑云母地质温度计及石榴石—斜长石地质压力计揭示了变质后期、变质同期及变质前期的变形作用导致的三种不同的P-T模式。变质期后的变形作用对逆变质带及相对分带有直接影响,该区变质作用的不连续性是推覆体运移的重要证据。变质周期的逆冲作用导致了与逆冲相关的、剖面上为具有热逆转及正常压力的变质带,明显的压力差异人为地认为是不同的P-T轨迹及不同的抬升速率的产物,在快速上隆(如逆冲层序)时,温度处于峰期而压力最低。变质作用时限可以持续到整个构造事件(除晚期褶皱作用外)结束,此时,同构造期侵入体在推覆接触带内就位,它们对剖面上强烈的温度逆转效应有影响,并且强烈地改变了下伏变质推覆构造单元的等变线分布。     

Interweaving the public and the private: women's responses to population policy shifts in Singapore

This study examined perceptions of the impacts of the antinatalist (OPP) and pronatalist (NPP) policies in Singapore. Data were obtained from a sample of 209 men and 280 women under 45 years old who lived in Ang Mo Kio New Town in the center of the island. Findings indicate that 53.4% of women said that fertility decisions were joint ones. 50% of women and 65% of men said that family size was jointly determined. Over 70% were aware of the OPP "stop at 2" policy. Those who gave accurate, detailed knowledge were mostly over 35 years old. Knowledge of OPP did not vary by education, but did vary by awareness of incentives and disincentives. 45.4% of women believed that OPP was a necessary state policy; 25.4% did not. 36.4% thought that OPP was fair; 28.3% did not. 60.3% of women said that OPP did influence family size in society, but 63.8% said it did not influence their individual family size. Finances, education, and child care were explanatory factors in individual planning. OPP is viewed as a successful policy not because of ideology, but because of the value placed on improved socioeconomic standards. 58.2% of women and 55.5% of men knew the details about the NPP. 51.9% of women said the NPP would encourage larger family size, but 87.8% said it would not affect them personally. Findings suggest that personal freedoms and public ideology are not binary, public-private concepts in fertility decision making.     

直接解释地表地质构造的重力异常剖面的近似方法

前言关于求解引起重力异常的地质体形状的问题,在一般情况下还没有直接的解法.对这种问题.为了求得严格的解必须求助于尝试法(迭代法).对于二度地质体,博特(1960)、福尔尼埃和克鲁皮卡(1973)等人曾较详细地讨论过这一问题.对某些理想化的物体,斯基尔斯(1963)还提出了估计最大深度的方法.对于异常地质体的一般形状和密度差作     

ASCA Observation of the Quiescent X-Ray Counterpart to SGR 1627-41

We present a 2-10 keV ASCA observation of the field around the soft gamma repeater SGR 1627-41. A quiescent X-ray source, whose position is consistent both with that of a recently discovered BeppoSAX X-ray source and with the Interplanetary Network localization for this soft gamma repeater, was detected in this observation. In 2-10 keV X-rays, the spectrum of the X-ray source may be fit equally well by a power-law, blackbody, or bremsstrahlung function, with unabsorbed flux approximately 5x10-12 ergs cm-2 s-1. We do not confirm a continuation of a fading trend in the flux, and we find no evidence for periodicity, both of which were noted in the earlier BeppoSAX observations.     

磁层顶的法向和形状

利用ISEE1& 2 ,AMPTE/IRM和IMP8的高分辨率数据 ,以及MV和TD分析法首次给出了在同一辨认原则下找到的所有磁层顶穿越的法线方向 .在此基础上 ,用分段拟合法研究了磁层顶的平均位形 .结果表明 :(ⅰ )大多数磁层顶穿越是切向间断面 ;(ⅱ )赤道面内的磁层顶存在着某种不对称性 ;(ⅲ )无论行星际磁场南向还是北向 ,夜间一侧的磁层顶截面的张角明显大于白天一侧 ,现有经验模型采用的简单单一曲线可能难以完整描述整个磁层顶的位形 .