Paleomagnetic dating of the Cenjiawan Paleolithic site in the Nihewan Basin, northern China     

WANG Hongqiang  DENG Chenglong  ZHU Rixiang  XIE Fei 《中国科学D辑(英文版)》2006,49(3):295-303

It draws much attention of scientists how early hu- mans occupy and adapt to the rigorous climate and environment at high northern latitudes in East Asia after they stepped out of Africa, passed West Asia and finally arrived in East Asia[1-4]. Reliable age determi- nations of Paleolithic sites from northeastern Asia not only help to find out the earliest occupation of early humans in this region, but also relate to the founda- tion of the overall framework of human origin and migration[1-8]…  相似文献   

青海省恰卜恰地区深部热储温度估算     

李永革  蔺文静  邢林啸  王贵玲  刘志明 《地质与资源》2021,30(4):479

地下热储温度的确定,可为评价地热资源潜力提供重要参数.青海省恰卜恰地区地热资源丰富,但深部热储温度难以确定.利用青海省恰卜恰地区两个热水井,结合其水化学特征,采用多种方法估算深部热储温度.结果显示：二氧化硅温标指示性最强;PHREEQC软件对冷水混入和脱气作用进行了校正,使得计算结果相对准确可靠.经多种方法相互验证,最终确定恰卜恰地区新近系的热储温度在86~107℃,地温梯度大约为6℃/100 m.  相似文献   

The status quo and prospect of geothermal resources exploration and development in Beijing-Tianj in-Hebei region in China     

《China Geology》2020,3(1):173-181

The Beijing-Tianjin-Hebei region boasts rich geothermal resources and new achievements have been made in the exploration and development of geothermal resources in this region based on previous regional investigation. In detail, geothermal reservoirs of Gaoyuzhuang Formation of Jixian System and Changcheng System in Xiongan New Area have been recently discovered, opening up the second space of geothermal resources; the calculation method of the recoverable resources of geothermal fluid with reinjection being considered has been improved in Beijing-Tianjin-Hebei region, and uniform comprehensive assessment of shallow geothermal energy, hydrothermal geothermal resources, and hot dry rocks (HDR) geothermal resources in the whole Beijing-Tianjin-Shijiazhuang region has been completed. The scientific research base for cascade development and utilization of geothermal resources in Beijing-Tianjin-Hebei region has applied hydraulic fracturing technology to the geothermal reservoirs in Gaoyuzhuang Formation. As a result, the production capacity doubled and two-stage cascade utilization composed of geothermal power generation and geothermal heating were realized, with the first-phase installed capacity of 280 kW and the geothermal hearing is 30000 m². In this way, a model of the exploration, development, and utilization of geothermal resources formed. Large-scale utilization has become the future trend of geothermal resource development in Beijing-Tianjin-Hebei region, and great efforts shall be made to achieve breakthroughs in reinjection technology, geothermal reservoir reconstruction technology, thermoelectric technology and underground heat exchange technology.  相似文献   

The storm of 10 January 1997: electrodynamics ofthe high latitude e region from eiscat data     

《Journal of Atmospheric and Solar》1999,61(3-4):217-222

E region electrodynamic parameters like conductivities, currents and Jouleheating rates have been derived from incoherent scatter measurements (EISCAT) during theregarded storm. They show that this storm did not have a very strong influence on the auroralzone over northern Scandinavia. The electric field was strong but not exceptional, but all the otherparameters were only moderately enhanced compared to quiet conditions. This was mainly aconsequence of the low solar ionisation, since the sun was just barely above the horizon at 90 kmaltitude. The total energy deposition by Joule heating over the EISCAT area was about 6.5 TJcompared to 57,000 TJ of solar wind electromagnetic energy input into the magnetosphere.  相似文献   

基于流动重力资料的平原地区深部构造解释     

刘龙  张展伟  刘贾贾  马旭东  刘晓丹  刘志辉 《地震地磁观测与研究》2018,39(5):69-75

以河北省流动重力测点覆盖区域内邢台地区4条断裂为例,将卫星布格重力异常与实测布格重力异常进行对比,发现流动重力资料可更为详细地反映测点周围构造的空间分布特征,为精细刻画华北平原地区深部构造背景提供可靠资料。采用向上延拓方法,对实测布格重力异常进行处理,获得不同上延高度的布格重力异常图像,结合当地地震地质与构造资料进行分析,并对流动重力资料在构造解释上的应用前景进行展望,认为该方法可提高现有资料的利用价值,适合在流动重力测量地区推广。  相似文献   

河北永清MW4.3地震序列双差定位分析     

朱冰清  曹井泉  谭毅培  董一兵  孙路强  彭研枫  徐小远  赵黎明 《地震地磁观测与研究》2020,(1):13-18

使用双差定位法对2018年2月12日永清MW 4.3地震及其余震序列进行重新定位,共得到38个重新定位结果.结果显示:①余震序列分布更加集中,地震序列震中呈NE向分布,与河西务断裂带走向基本一致;②地震序列的震源深度主要为20—25 km,北东侧震源较浅,南西侧震源较深,主震位于地震剖面下部,此次地震引起的破裂可能为由深部到浅部.  相似文献   

基于正交分解的非线性结构外荷载识别方法研究     

郭丽娜  贾献卓  赵博宇  丁勇  白立波 《地震工程与工程振动》2021,41(1):184-192

提出一种基于切比雪夫正交分解的非线性结构外荷载识别方法及分解阶数确定办法.在识别过程中建立非线性结构体系状态空间方程,并将切比雪夫正交多项式展开系数扩展于状态量,对状态量进行递推估计.通过结构反应频域分析筛选频率范围并确定正交多项式项数.文中将通过6层隔震结构、波形钢腹板PC 组合梁桥的数值仿真和3层隔震框架的振动台试...  相似文献   

基于GIS的突发事件网络舆情传播可视化探究     

王敬泉  王凯 《测绘通报》2019,(12):142-146

我国处于社会转型期，对突发事件引起的网络舆情分析需求迫切。微博由于其大数据特点为公众舆论和自然环境知识发现提供大量数据，将其与位置信息联系能给地理分析提供新的发现。通过用户发布的微博消息进行分析挖掘，为公众舆论监督提供帮助，为政府决策提供信息。本文在微博数据帮助下进行了数据挖掘，在空间维度上分析了舆论传播模式，使用可视化与统计方法相结合的方式探究了舆情传播规律。  相似文献   

海河平原北部地区山前-滨海表层土壤地质地球化学特征   总被引：1，自引：0，他引：1  

王轶  曹峰  李瑞敏  马忠社  郭海全  马浩 《地质通报》2010,29(8):1210-1214

对海河平原北部地区不同地质地貌类型的表层土壤粒度、矿物成分和元素地球化学进行了研究,结果显示,从山前至滨海表层土壤地质地球化学特征与原生沉积环境的相关关系,在空间上表现出随着地质地貌和沉积环境特征的变化而演变的规律。  相似文献   

全站仪和CORS在篮球场地放样中的比较     

孙志鹏 《测绘与空间地理信息》2012,35(11):207-209

全站仪和CORS系统在测绘实际工作中已经广泛引用。本文通过具体工作案例,在篮球场地放样过程中对两种方法进行对比,分析了各个方法的优缺点。通过操作比较,探讨了各种方法的适用环境,为其他测绘部门和相关工作者提供参考。  相似文献