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61.
雪峰山加里东造山运动及其体制转换 总被引:17,自引:0,他引:17
本文论述了雪峰山地区加里东造山运动的变形序列,加里东运动期间,至少存在3个连续的构造热事件。并且阐述了挤压体制向伸展体制的转换,形成低角度滑脱带,高角度正断层及变质核杂岩。 相似文献
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造山带挤出构造阐述了被边界断裂所围限的造山带深变质块体,在造山带内部垂向和(或)侧向应力的作用下折返变形的过程。研究主要集中在挤出块体的几何形态及其内部变形样式、边界断裂特征、挤出路径以及挤出动力来源等4个方面,其研究目的主要是为了解决造山带深变质岩石折返剥露的机制问题。依据挤出块体的挤出方向与造山带主体走向之间的关系,在三维球形坐标系Lx-Ly-Lz中,将造山带挤出构造大致分为7个端员类型(Ⅰ型~Ⅶ型)。其中Lx为造山带或俯冲带的主体走向;Ly呈水平方向并与Lx相垂直;Lz垂直于Lx和Ly所构成的平面。这些基本端员类型的组合及其之间的过渡类型可以详尽地诠释大别山印支期高压-超高压岩石的挤出过程。其中榴辉岩相挤出阶段介于Ⅳ型与Ⅶ型挤出构造之间,角闪岩相挤出阶段介于Ⅱ型与Ⅵ型挤出构造之间并可能具有渠道流挤出模式,而绿片岩相挤出阶段类似于Ⅴ型挤出构造。 相似文献
64.
First feed support system, which is one of the key technologies of Five hundred meter Aperture Spherical Telescope (FAST)
was discussed in this paper. A 1:30 scaled model (20 m × 20 m × 6 m) has been built to make systemic research on the feasibility
of the system. The root mean square of pointing error of moving cable car was measured and the displacements of cable car
within the wind speed of 8 m/s, which is the maximal wind speed of the place where the FAST will be located, were evaluated.
Then the total maximal pointing error of cable car was computed. Experimental results demonstrate that the total pointing
error of the cable car is less than 50 cm, the required pointing accuracy error of the system.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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As the deployment of large Low Earth Orbiters (LEO) communication constellations, navigation from the LEO satellites becomes an emerging opportunity to enhance ... 相似文献
67.
An inexact inventory-theory-based chance-constrained programming model for solid waste management 总被引:1,自引:1,他引:0
XiuJuan Chen GuoHe Huang MeiQin Suo Hua Zhu Cong Dong 《Stochastic Environmental Research and Risk Assessment (SERRA)》2014,28(8):1939-1955
In this study, an inexact inventory-theory-based chance-constrained programming (IICP) model is proposed for planning waste management systems. The IICP model is derived through introducing inventory theory model into a general inexact chance-constrained programming framework. It can not only tackle uncertainties presented as both probability distributions and discrete intervals, but also reflect the influence of inventory problem in decision-making problems. The developed method is applied to a case study of long-term municipal solid waste (MSW) management planning. Solutions of total waste allocation, waste allocation batch and waste transferring period associated different risk levels of constraint violation are obtained. The results can be used to identify inventory-based MSW management planning with minimum system cost under various constraint-violation risks. Compared with the ICP model, the developed IICP model can more actually reflect the complexity of MSW management systems and provide more useful information for decision makers. 相似文献
68.
Bo Liu Sanzhong Li Suhua Jiang Yanhui Suo Lingli Guo Yongming Wang Huixuan Zhang 《Marine Geophysical Researches》2017,38(1-2):137-147
Transform faults in back-arc basins are the key to revealing the opening and development of marginal seas. The Okinawa Trough (OT) represents an incipient and active back-arc or marginal sea basin oriented in a general NE-SW direction. To determine the strikes and spatial distribution of transform faults in the OT, this paper dissects the NW- and NNE-SN-trending fault patterns on the basis of seismic profiles, gravity anomalies and region geological data. There are three main NW-trending transpressional faults in the OT, which are the seaward propagation of NW-trending faults in the East China Continent. The NNE-SN-trending faults with right-stepping distribution behave as right-lateral shearing. The strike-slip pull-apart process or transtensional faulting triggered the back-arc rifting or extension, and these faults evolved into transform faults with the emergence of oceanic crust. Thus, the transform fault patterns are inherited from pre-existing oblique transtensional faults at the offsets between rifting segments. Therefore, the OT performs the oblique spreading mechanism similar to nascent oceans such as the Red Sea and Gulf of Aden. 相似文献
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