坳陷湖盆古地貌对沉积体系的控制作用 ——以准噶尔盆地中部侏罗系三工河组二段一砂组为例     

厚刚福  王力宝  宋兵  曾德龙  贾开富  窦洋  李亚哲  彭博  郭华军  邹志文  司学强 《地质学报》2022,96(7):2519-2531

为了明确坳陷湖盆古地貌对沉积体系的控制作用，认识沉积体系展布规律，优选下一步勘探领域，以准噶尔盆地中部侏罗系三工河组二段为例，采用地层厚度法恢复了古地貌，细化了古地貌单元，并通过岩芯观察，识别了沉积微相，在此基础上，通过古地貌单元与沉积微相叠合分析，提出了坳陷湖盆沉积期古地貌对沉积体系、沉积微相和岩性圈闭的形成具有重要的控制作用。研究结果表明：准噶尔盆地中部三工河期为隆凹相间的古地貌格局，具有水下古低凸、水下古沟槽、古坡折和水下古平台等4类古地貌单元，发育湖泊-三角洲沉积体系，可进一步识别出水下分流河道、分流间湾、席状砂和砂质碎屑流微相。水下古沟槽充填水下分流河道微相砂体，水下古低凸主体部位发育分流间湾相泥岩，古坡折之下的水下古平台发育砂质碎屑流砂体。水下古低凸翼部发育的水下分流河道砂体向低凸方向超覆尖灭，水下古平台发育的砂质碎屑流砂体呈“泥包砂”结构，储层性质较优，岩性圈闭条件好，成藏条件优越，为下一步最有利勘探领域。  相似文献   

基于卡尔曼滤波方法的WM手持机BDS/GPS单频RTK算法研究     

曹兵  赵文全 《测绘与空间地理信息》2021,44(12):125-127

首先对基于卡尔曼滤波的单频RTK定位模型进行研究,介绍了基于RTCM的数据流解码过程,并通过实时数据分别对基于卡尔曼滤波方法的WM手持机BDS/GPS单频RTK定位算法进行计算.在静态条件下,该算法在东方向精度优于0.13 m、北方向优于0.14 m、高方向优于0.35 m;在动态环境下轨迹轮廓与实际地物符合较好,定位状态稳定.  相似文献   

    

Shen Bing 《中国地理科学(英文版)》2004,14(2):97-103

While China’s economic growth has been impressive since 1978, regional disparity in terms of provincial per capita GDP has been increasing. On the other hand, this rapid but uneven growth was accompanied by China’s deepening openness and structural reforms including the development of non-state-owned enterprises (non-SOEs) and fiscal decentralization. Based on quantitative analyses, this paper tries to explore the features of regional disparity in China and the relationships between regional growth and China’s openness and economic structure reforms in the period from 1981 to 2000. The paper finds that the catching-up of the coastal region to the initially rich provinces, which are mainly located in inland areas, brought about a convergence of the growth pattern across provinces in the 1980s. The subsequent divergence in the provincial growth rates between the coast and the interior generated an enlarging regional disparity in China in the 1990s. The ever-faster growth in the coastal region was benefited by China’s openness and the development of non-state-owned enterprises. The development of non-state-owned enterprises underlies the higher operational efficiency in the coastal region. Additionally, with the insignificant regression results, fiscal decentralization was observed to facilitate faster growth in the coast region. The findings justify the initiative of the "West Region Development Strategy" and offer some policy implications for China. Biography: SHEN Bing (1966–), female, a native of Hebei Province, associate professor, specialized in regional economy and urban development. E-mail: shenbing@mx.cei.gov.cn  相似文献   

三个连续性台风特征分析   总被引：2，自引：2，他引：0  

张劲梅  何冰  叶昌儒 《广东气象》2003,(3):10-12

“榴莲”、“尤特”、“玉兔”三个台风前后相隔不到4天、20天在同一月份相继登陆广东沿海,且均严重影响粤西地区,在历史同期是首例。本文从有利台风形成、发展的大尺度环流背景、制约台风移向的有利环境场演变和台风登陆带来茂名地区风雨分布悬殊特点进行分析,为探讨热带气旋预报累积一定经验。  相似文献   

Pressurised Extraction Using Dilute Ammonia: A Simple Method for Determination of Iodine in Soil, Sediment and Biological Samples by Inductively Coupled Plasma-Mass Spectrometry     

Li Bing  Ma Xinrong  Han Lirong  Yang Hongxia 《Geostandards and Geoanalytical Research》2004,28(2):317-323

A simple sample treatment method for the accurate and precise determination of iodine in soil, sediment and biological samples by inductively coupled plasma-mass spectrometry (ICP-MS) is described. Iodine in samples was extracted in screw top PTFE-lined stainless steel bombs using a 10% v/v ammonia solution at 185 C for 18 hours (overnight), after which the extract was introduced into the ICP-MS for direct measurement. ¹²⁶Te was employed as the internal standard to compensate for matrix effects and instrument drift. The limit of detection (LOD, three times the standard deviation of the procedural blank solution, expressed as the concentration in the sample solution) was 0.003 ng ml-^-1. The limit of quantitation (LOQ, ten times the standard deviation of the procedural blank solution, expressed as the concentration in the solid samples, dilution factor DF = 100) was 0.01 μg g-^-1 (dry mass). The accuracy and precision of the method were demonstrated by analysing different Chinese geological certified reference materials (soils, stream sediments and a hair sample). The measured concentrations were in a good agreement with the certified values indicating that bias in the method was not significant. The precision (n = 10) for different concentrations ranged from 1.82% to 4.32% RSD. Comparison of the ammonia extraction procedure with a "sintering" method indicated that there was no significant difference in results obtained with the two methods for geological soil and stream sediment samples. However, for biological samples, such as hair, kelp, tea etc., the results obtained by the sintering method were far below those of the ammonia extraction method. The ammonia extraction has advantages, as it is simpler than the "sintering" method, and has a lower procedural blank, better detection limits and reproducibility. Due to the simplicity of the method, a high rate of sample throughput is possible.  相似文献   

山东胶莱盆地形成的动力学条件及其与金成矿作用的相关性讨论   总被引：5，自引：5，他引：5  

徐贵忠  蔡燕杰  周瑞  佘宏全  王艺芬  宋明  李兵 《现代地质》2004,18(1):8-16

山东胶莱盆地位于胶东地区的胶北隆起区和胶南造山带之间,在大地构造位置上,位于叠置在华北板块和扬子板块的拼合带部位,它的周边被深断裂所围限和控制,因此属于一个断陷盆地。自晚侏罗世至晚白垩世,胶莱盆地经历了初始拉张、强烈拉张、稳定扩张和萎缩消亡的几个构造演化阶段。它的形成和发展与中生代库拉—太平洋板块向欧亚板块俯冲以及郯—庐断裂带的强烈活动的动力学背景密切相关。胶莱盆地在形成和发育过程中,对胶北隆起区的大规模金成矿作用中的控矿构造的时空演化、矿液上侵驱动转移、成矿热动力、成矿流体和金属来源等方面均有一定的贡献。  相似文献   

深圳抽水蓄能电站区域构造稳定性评价     

全旭东  李名松  梁春利  汪冰  马密堂  何钦华 《水文地质工程地质》2004,31(1):32-35,94

在深圳抽水蓄能电站区域地质构造背景分析的基础上 ,认为深圳大断裂和横岗—盐田断裂是控制电站场址区域构造稳定性的重要断裂 ,挽近期以来活动较明显 ,但全新世或晚更新世以来趋于稳定 ,对本电站场址构造稳定性没有构成威胁。同时 ,对地震危险性进行了进一步研究分析 ,并综合评价了场址区的构造稳定性问题。根据地震危险性分析结果以及未来 5 0年 10 %概率烈度计算值 ,本场址基本烈度为Ⅶ度 ,本工程场地可按Ⅶ度抗震设防。  相似文献   

高层建筑动态和静态风荷载的确定   总被引：5，自引：0，他引：5  

李会知  吴义章  郑冰 《世界地震工程》2004,20(2):101-105

简单介绍了利用高频天平测量高层建筑风荷载的原理和试验方法，讨论了高层建筑风响应的计算，提出了一种动态风荷载和静态风荷载沿高度分布的计算方法。结果分析指出：提出的求沿高层建筑高度分布的等效静态风荷载的方法适用于顺风向风力，应用于横风向风力有理论误差。  相似文献   

民乐-山丹地震的区域构造变形背景与中短期前兆   总被引：9，自引：1，他引：9  

张希  王双绪  崔笃信  张晓亮  薛富平  陈兵 《中国地震》2004,20(3):238-246

利用青藏块体北缘地区2001～2003年GPS水平运动资料和1988—2003年跨断层短水准流动观测资料，借助改进的负位错模型及断层形变应变强度比一时变曲线，研究了与2003年10月25日民乐-山丹Ms6．1，Ms5．8地震孕育有关的区域构造变形背景与中短期前兆异常。分析表明，在昆仑山Ms8．1大震引起的大区域形变调整-短期松弛-开始恢复的背景下，民乐-山丹地震震源位于可能反映应变能积累加速的块体边界压性锁定段之间的剪应力强度增强段北侧；距震中最近的石灰窑口跨断层短水准流动场地在震前3个月呈现显著应变强度比异常，而震前10余天至数月内整个监测区异常个数、震前3个月相对近源区异常集中与局部增强均是对这两次地震的某种预示。  相似文献   

面向应用的海量高光谱影像处理与分析系统集成与实践   总被引：1，自引：0，他引：1  

胡兴堂  张兵  李俊生  郑兰芬  童庆禧 《遥感学报》2005,9(5):604-609

论述了基于VC 6.0平台开发的高光谱遥感影像处理与分析系统H IPAS V1.0TM系统关键技术与总体架构,详细讨论了面向海量高光谱影像数据框架设计和针对行业应用的系统集成思路。给出了基于航空平台的高光谱图像处理与分析系统的处理流程和业务模式。解决了海量遥感影像的处理、分析以及地表参量反演等关键问题,并针对具体行业应用(如水环境监测,植被生长监测,岩石矿物填图)提供基础支撑平台。并给出了H IPAS V1.0TM系统典型的应用实例。  相似文献