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塔拉  陈阜超  韩月萍 《大地测量与地球动力学》2013,33(5):11-15

????1998-2006??????????????????????????????????????о??????????????????????????????????????????39.3°N??磬?????????????????С???????????????????1998-2002???в????????????????????????2002-2004??????????????????????2004-2006??????????  相似文献   

云南地区地壳垂直运动与地震的关系     

郭良迁  塔拉  陈阜超  周海涛  陈聚忠  薄万举 《大地测量与地球动力学》2013,33(1):1-5

利用云南地区1951—2011年的水准复测资料,计算获得了1951—1980年、1980—1994年、1994—2011年、1951—2011年的垂直形变速率图和各个阶段的形变增量场,结合该区的地震活动,研究了垂直形变与地震的关系。结果表明：7级以上地震主要发生在上升区,与区域性上升有关;地震多数发生在垂直形变速率增量场的正值区。  相似文献   

A Preliminary Study on the Occurrence of Pharmaceutically Active Compounds in Hospital Wastewater and Surface Water in Hanoi,Vietnam          下载免费PDF全文

Ngoc Han Tran  Taro Urase  Thi Thao Ta 《洁净——土壤、空气、水》2014,42(3):267-275

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一次华北地区西南涡暴雨的数值模拟分析     

王爱君  高万泉  石燕茹  宋晓辉  张聪利 《内蒙古气象》2015,(1):3-8

采用WRFV3.01模式对2010年7月18—20日发生在华北地区的西南涡暴雨过程进行了模拟与分析。结果表明:这次西南涡暴雨主要降水机制是高低空急流的耦合。暴雨出现在低空急流的前方和高空急流的右后方;高空急流为强降水提供了高层的辐散场和高层的干冷空气,低空急流为降水区提供了充足的水汽和能量;这次西南涡降水有明显的暖锋降水性质。  相似文献   

Grain boundaries as microreactors during reactive fluid flow: experimental dolomitization of a calcite marble   总被引：2，自引：0，他引：2  

B.?Etschmann  J.?BruggerEmail author  M.?A.?Pearce  C.?Ta  D.?Brautigan  M.?Jung  A.?Pring 《Contributions to Mineralogy and Petrology》2014,168(2):1045

Limestone dolomitization is an example of a fluid-induced mineralogical transformation that commonly affects extensive rock volumes. To understand the mechanisms enabling these efficient replacement reactions, we investigated experimentally the dolomitization of a fractured calcite marble under flow-through conditions at mild hydrothermal conditions. Contrary to most earlier studies of coupled dissolution reprecipitation reactions that were conducted using small, individual grains, in this study, the integrity of the rock was preserved, so that the experiment explored the links between flow in a fracture and fluid–rock interaction. In these experiments, grain boundaries acted as microreactors, in which a Mg-poor ‘protodolomite’ formed initially, and then transformed into dolomite. The difficulty in nucleating dolomite played a key role in controlling the evolution of the porosity, by allowing for (1) initial dissolution along grain boundaries, and (2) formation of coarse porosity at the reaction interface. This porosity evolution not only enabled the reaction to progress efficiently, but also controlled the mineralogy of the system, as shown by brucite replacing calcite near the fracture once the fluid along calcite grain boundaries became sufficiently connected to the fluid flowing through the fracture. This study illustrates the role of grain boundaries, porosity evolution and nucleation in controlling reaction progress as well as the nature and textures of the products in pervasive mineralogical transformations.  相似文献