伴生金赋存状态的几种主要研究方法

作者总结了在多年研究伴生金赋存状态中常采用的光学显微镜法、电子探针分析法、元素的化学分析法、选择性溶解法及元素平衡配分法等几种有效的研究方法,并给出一些应用的例子.通过这些研究方法,能够有效、快捷地查清伴生金的赋存状态特征及分布规律,为今后的研究提供可借鉴的经验.     

江苏金坛地质遗迹特征及旅游开发建议

金坛市拥有丰富的地质遗迹资源，包括地层剖面、古生物化石产地与古文化遗址、地质构造形迹、地质地貌景观、水体景观、岩溶洞穴、矿产产地与观赏石景点8大类。对其应遵循原态保护的原则，以茅山风景名胜区为重点，因地制宜地开展有特色的大众地学科普旅游，为地方经济和社会发展作出贡献。     

磁通门磁变仪与经典磁变仪状态函数之比较

分析了影响磁通门磁变仪定向状态函数和经典磁变仪定向状态函数改变的因素，对磁通门磁变仪定向状态函数和经典磁变仪定向状态函数及其稳定性进行了比较，得出了有益的结论。     

国际锂镁产业最新动态

就 1999年末以来国际锂镁产业领域一些新的变化予以报道 ,并就目前公开资料中所能获取锂镁的年产能力、销售份额、产品产值等实事数据一并予以提供     

天马山硫金矿床金的赋存状肪及分布规律

矿床中金主要以独立矿物相存在，少数为细粒分散相，金的载体矿物主要有黄铜矿，毒砂，黄铁矿，综合脉石和磁黄铁矿等，金矿物主要为自然金，银金矿，平均成色745．57，金的嵌布类型有粒间金，包裹金，裂隙金3种，金在矿石中及不同矿体中的分布不均匀，金与流，金与砷的相关性因矿体类型及矿石类型的不同而有差异。     

The Character of Shear-wave Splitting in Marble in the Critical State of Rupture

This paper mainly observed and analyzed the character of shear-wave splitting in rock specimens while they were in the critical state of rupture. The rock specimens for study are made of Laizhou marble from Shandong, China. A series of records were obtained from two rock specimens when they were in the critical state of rupture. The result shows that, in the critical state just before rock rupture, there may be the phenomenon of rise and fall in the time delay of shear-wave splitting, even though the load was kept constant. That is to say, the time delay of shear-wave splitting may have a falling process before rock rupture.     

孕震动力系统的研究趋势与展望

该文综述了近年来应用浑沌动力学研究固化介质中裂纹的传播问题，描述了地震发生的动力学模拟，探讨了利用时间序列的相空间重构问题，最后对这些问题进行了简略的讨论。     

岩石受力状态对弹性波传播速度影响的初步研究

岩石所受的三向应力状态对其弹性波传播性质有一定的影响，此认识为所做的以泥质砂岩、泥岩和硅质胶结的坚硬砂岩为试样的实验所证实。为保证岩石中存在微隙，对部分试样还作了高温预热处理。实验结果表明，泥质砂岩和泥岩的Ｖ＿ｐ／Ｖ＿ｓ值几乎保持不变，但坚硬砂岩的Ｖ＿ｐ／Ｖ＿ｓ值曲线却在应力达破坏荷载的９０％左右时出现下凹现象，经热处理的硬砂岩的这一下凹现象则更突出。     

Chaotic seismic faulting with a mass-spring model and velocity-weakening friction

We present a systematic analysis of the dynamical behavior introduced by fault zone heterogeneities, using a simple mass-spring model with velocity-weakening friction. The model consists of two sliding blocks coupled to each other and to a constant velocity driver by clastic springs. The state of this system can be characterized by the positions of the two blocks relative to the driver. Symmetry stabilizes the system and generates only cyclic behavior. For an asymmetric system where the frictional forces for the two blocks are not equal, the solutions exhibit chaotic behavior. The transition from stable cyclic behavior to chaos is characterized by the period-doubling route to chaos. Lyapunov exponents are computed to quantify the deterministic chaos and to locate the onset of the chaotic evolution in parameter space. In many examples of deterministic chaos, chaotic behavior of a low-order system implies chaos in similar higher order systems. Thus, our results provide substantial evidence that crustal deformation is an example of deterministic chaos.     

论异常地层压力在构造研究中的意义

本文将异常地层压力、压力系数及平衡深度等概念和构造研究联系起来,着重探讨压力系数在构造发育中的重要意义。